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Sample records for southeast denver colorado

  1. Denver, Colorado: Solar in Action (Brochure)

    SciTech Connect

    Not Available

    2011-10-01

    This brochure provides an overview of the challenges and successes of Denver, Colorado, a 2008 Solar America City awardee, on the path toward becoming a solar-powered community. Accomplishments, case studies, key lessons learned, and local resource information are given.

  2. Health-hazard evaluation report HETA 84-257-1650, Denver Water Department, Denver, Colorado

    SciTech Connect

    Pryor, P.

    1986-01-01

    Environmental surveys conducted on February 4 and July 16, 1985 at the Denver Water Department, Denver, Colorado, included collection of breathing-zone and general-area samples for asbestos and personal sampling for noise exposure. The Denver Water Department had requested an evaluation of potential health hazards to employees during cutting of cement pipes thought to contain asbestos.

  3. National Uranium Resource Evaluation: Denver Quadrangle, Colorado

    SciTech Connect

    Hills, F.A.; Dickinson, K.A.; Nash, J.T.; Otton, J.K.; Dodge, H.W.; Granger, H.C.; Robinson, K.; McDonnell, J.R.; Yancey, C.L.

    1982-09-01

    Nine areas in the Denver 1/sup 0/ x 2/sup 0/ Quadrangle, Colorado have been identified as favorable for the occurrence of uranium deposits containing a minimum of 100 tons U/sub 3/O/sub 8/ at grades of 0.01% or better. Six of these areas are in metamorphic and igneous rocks of the Front Range, one is in sedimentary rocks of South Park, and two are in sedimentary rocks of the Great Plains. Favorable areas and the classes of deposits for which they are thought to be favorable are: Area A, The Foothills Favorable Environment (700 km/sup 2/ to a depth of 1500 m); Areas B-D, The Silver Plume Granite Favorable Environment; Area E, Southern Elkhorn Upthrust Favorable Environment; Area F, South Park Favorable Environments (27 km/sup 2/ in units of variable thickness); Area G, Dawson Arkose Favorable Environment (3600 km/sup 2/ with an estimated thickness of 50 m); and Area H, Fox Hills Formation Favorable Environment (700 km/sup 2/ with an estimated thickness of 38 m). Other areas and environments in the Denver Quadrangle have uranium occurences and some have yielded small amounts of uranium ore in the past (for example the Central City district). These areas are ranked as unfavorable because in our judgment the evidence does not suggest favorability for deposits of the minimum size. However, neither empirical data nor genetic models for uranium deposits are adequate presently to make determinations of favorability with confidence, and changes of rank are to be expected in the future.

  4. Sequence stratigraphic interrelationship of Lower Cretaceous Dakota and Purgatoire Formations in northeast New Mexico/southeast Colorado and correlative strata (Muddy, Skull Creek, Plainview) of the Denver basin

    SciTech Connect

    Holbrook, J.M. )

    1991-03-01

    The Albian Glencairn Member (Purgatoire Formation) and underlying Dakota Sandstone of southeastern Colorado and northeastern New Mexico are related depositionally to the Tucumacari, Mesa Rica, and Pajarito formations of east-central New Mexico and to the Plainview, Skull Creek, and Muddy formations of central Colorado. Depositional interrelationships of these strata are best understood when placed in a sequence-stratigraphic framework. The Plainview Formation, Long Canyon sandstone bed (basal Glencairn) and Campana sandstone bed (basal Tucumcari) overlie a correlative lowstand surface of erosion (LSE) and represent backfilling of valleys during Kiowa-Skull Creek transgression. These strata are separated from overlying marine transgressive shale deposits of the lower Skull Creek, Glencairn, or Tucumcari, respectively, by a correlative transgressive surface of erosion. Fluvial incision during maximum Kiowa-Skull Creek regression is manifest as an LSE atop Skull Creek and Glencairn marine deposits. Southward-flowing streams debouched into the maximum regressive sea forming a lowstand wedge, the remnants of which are represented by the Mesa Rica, Pajarito, and uppermost Tucumcari formations. Stable base level conditions developed near the maximum regressive shoreline resulting in widening of paleovalleys and deposition of a fluvial lowstand sheet sandstone in southeastern Colorado and northeastern New Mexico. Transgression followed lowstand deposition and resulted in backfilling of paleovalleys represented by portions of the Muddy and Dakota sandstones.

  5. Aquifers of the Denver Basin, Colorado

    USGS Publications Warehouse

    Topper, R.

    2004-01-01

    Development of the Denver Basin for water supply has been ongoing since the late 1800s. The Denver Basin aquifer system consists of the water-yielding strata of Tertiary and Cretaceous sedimentary rocks within four overlying formations. The four statutory aquifers contained in these formations are named the Dawson, Denver, Arapahoe, and Laramie-Fox Hills. For water rights administrative purposes, the outcrop/subcrop of the Laramie-Fox Hills aquifer defines the margins of the Basin. Initial estimates of the total recoverable groundwater reserves in storage, under this 6700-mi2 area, were 295 million acre-ft. Recent geologic evidence indicates that the aquifers are very heterogeneous and their composition varies significantly with distance from the source area of the sediments. As a result, available recoverable reserves may be one-third less than previously estimated. There is no legal protection for pressure levels in the aquifer, and water managers are becoming increasingly concerned about the rapid water level declines (30 ft/yr). Approximately 33,700 wells of record have been completed in the sedimentary rock aquifers of the Denver Basin for municipal, industrial, agricultural, and domestic uses.

  6. Health Hazard Evaluation Report HETA 84-340-1606, Denver Laundry and Dry Cleaning, Denver, Colorado

    SciTech Connect

    Pryor, P.

    1985-07-01

    Environmental and breathing zone samples were analyzed for tetrachloroethylene (perchloroethylene) (PCE) at Denver Laundry and Dry Cleaning, Denver, Colorado in July, 1984. The evaluation was requested by a company representative to determine if a health hazard from exposure to PCE existed during the commercial laundry and dry cleaning processes. A noise evaluation was also requested. The author concludes that a health hazard exists due to overexposure to PCE and noise at the facility. Recommendations include replacing the present transfer system by a dry/to/dry closed system if possible, improving work practices, removing clothing from each machine at the same time replacing or cleaning and oiling the bearings in the dryers, and establishing an educational program to instruct new employees on the hazards of chemical and noise exposure.

  7. Hydrogeologic data from parts of the Denver Basin, Colorado

    USGS Publications Warehouse

    Major, T.J.; Robson, S.G.; Romero, J.C.; Zawistowski, Stanley

    1983-01-01

    This report presents hydrogeologic data collected and compiled during 1956-81 as part of a comprehensive hydrogeologic data collected and compiled during 1956-81 as part of a comprehensive hdryogeologic investigation of the Denver basin, Colorado, by the U.S. Geological Survey in cooperation with the Colorado Department of Natural Resources, Division of Water Resources, Office of the State Engineer. The data, in tabular and graphic form, consist of records for 870 wells which include water-level data for 158 wells and water-quality analyses for 561 wells; geophysical logs from three wells which include resistivity, self potential, and natural gamma logs; and gain-and-loss data of streamflow measured at 54 sites. (USGS)

  8. Health-hazard evaluation report HETA-91-161-2225, Denver Police Department, Denver, Colorado

    SciTech Connect

    Lee, S.A.; McCammon, C.S.

    1992-05-01

    In response to a request from the Denver Police Department (SIC-9221) in Denver, Colorado, an investigation was made into lead (7439921) exposures during the use of different ammunition on the firing range. Ventilation rates were measured and personal breathing zone air samples were collected for ten officers during the firing of .45 caliber pistols. Nonlead primers were not yet available for .45 caliber ammunition. Air lead exposure ranged from 1.0 to 16 micrograms/cubic meter (microg/cu m). A slight improvement was noted in ventilation since an earlier NIOSH study had been performed at this site. The improvement resulted from the removal of a 3 foot high partition along the floor on the firing line. There was still, however, turbulent air flow across the entire firing line and backflow in some of the shooting booths. The author concludes that there was no health hazard from lead overexposure at this site at this time, but recommends use of jacketed bullets, nonlead primers, and administrative controls to minimize lead exposures.

  9. Vertical hydraulic conductivity measurements in the Denver Basin, Colorado

    USGS Publications Warehouse

    Barkmann, P.E.

    2004-01-01

    The Denver Basin is a structural basin on the eastern flank of the Rocky Mountain Front Range, Colorado, containing approximately 3000 ft of sediments that hold a critical groundwater resource supplying many thousands of households with water. Managing this groundwater resource requires understanding how water gets into and moves through water-bearing layers in a complex multiple-layered sedimentary sequence. The Denver Basin aquifer system consists of permeable sandstone interbedded with impermeable shale that has been subdivided into four principle aquifers named, in ascending order, the Laramie-Fox Hills, Arapahoe, Denver, and Dawson aquifers. Although shale can dominate the stratigraphic interval containing the aquifers, there is very little empirical data regarding the hydrogeologic properties of the shale layers that control groundwater flow in the basin. The amount of water that flows vertically within the basin is limited by the vertical hydraulic conductivity through the confining shale layers. Low vertical flow volumes translate to low natural recharge rates and can have a profound negative impact on long-term well yields and the economic viability of utilizing the resource. To date, direct measurements of vertical hydraulic conductivity from cores of fine-grained sediments have been published from only five locations; and the data span a wide range from 1??10-3 to 1??10-11 cm/sec. This range may be attributable, in part, to differences in sample handling and analytical methods; however, it may also reflect subtle differences in the lithologic characteristics of the fine-grained sediments such as grain-size, clay mineralogy, and compaction that relate to position in the basin. These limited data certainly call for the collection of additional data.

  10. 75 FR 5283 - Foreign-Trade Zone 123 - Denver, Colorado, Application for Subzone, Vestas Nacelles America, Inc...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-02

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF COMMERCE Foreign-Trade Zones Board Foreign-Trade Zone 123 - Denver, Colorado, Application for Subzone, Vestas Nacelles America, Inc. (Wind Turbine Nacelles, Hubs, Blades and Towers), Brighton, Denver, Pueblo, and Windsor, Colorado An application has been...

  11. 2011 Residential Energy Efficiency Technical Update Meeting Summary Report: Denver, Colorado - August 9-11, 2011

    SciTech Connect

    Not Available

    2011-11-01

    This report provides an overview of the U.S. Department of Energy Building America program's Summer 2011 Residential Energy Efficiency Technical Update Meeting. This meeting was held on August 9-11, 2011, in Denver, Colorado, and brought together more than 290 professionals representing organizations with a vested interest in energy efficiency improvements in residential buildings.

  12. Financing Solar Installations with New Markets Tax Credits: Denver, Colorado (Fact Sheet)

    SciTech Connect

    Coughlin, J.

    2010-09-01

    Fact sheet provides a brief overview of New Markets Tax Credits (NMTCs), a third-party financing incentive for solar installations in the public sector. NMTCs are intended to encourage economic activity in low-income and disadvantaged neighborhoods. The use of NMTCs in an innovative solar project transaction by the City of Denver, Colorado, is highlighted.

  13. Zeolites replacing plant fossils in the Denver formation, Lakewood, Colorado.

    USGS Publications Warehouse

    Modreski, P.J.; Verbeek, E.R.; Grout, M.A.

    1984-01-01

    Well-developed crystals of heulandite and stilbite, within fossil wood, occur in sedimentary rocks in Lakewood, Jefferson County. The rocks belong to the Denver formation, a locally fossiliferous deposit of fluvial claystone, siltstone, sandstone and conglomerate, containing some volcanic mudflows (andesitic) of late Cretaceous to Palaeocene age. Altered volcanic glass released Na and Ca into the ground-water and subsequently zeolites were crystallized in the open spaces between grains and within fossil plant structures. Minor pyrite, quartz (jasper), calcite and apatite also occur as replacements of fossil wood. Similar zeolite occurrences in other areas are reviewed.-R.S.M.

  14. 78 FR 19296 - Notice of Inventory Completion: History Colorado, formerly Colorado Historical Society, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-29

    ... transferred to History Colorado, where they are referred to as Office of Archaeology and Historic Preservation... the Colorado Office of Archaeology and Historic Preservation). The remains described above...

  15. Geologic controls of subdivision damage near Denver, Colorado

    USGS Publications Warehouse

    Noe, D.C.

    2005-01-01

    This case study investigates the geologic controls on damaging ground deformations in a residential subdivision near Denver, Colo. Moderate to severe damage has occurred in certain areas where linear, parallel heave features with up to 0.3 in (1 ft) of differential displacement have formed across roads and under houses. Other areas have small, localized depressions that have formed in the roadsides with no discernable damage to nearby houses. Still other areas show no evidence of ground movements. The bedrock beneath the subdivision consists of steeply dipping Cretaceous strata of the Benton Shale, Niobrara Formation, and Pierre Shale. Quaternary soil deposits and fill, 0-16 m (0-53 ft) thick, overlie the bedrock. The most pronounced and damaging linear-heave features are coincident with steeply dipping, silty claystone with thin layers of very highly plastic bentonite. These heave features diminish as the depth to bedrock increases, and become small to negligible where the bedrock is overlain by 3 m (10 ft) or more of overburden soil deposits or fill. In contrast, areas having no visible damage and those having localized surface depressions are typically underlain by 1-12 m (3-39 ft) of alluvial-terrace deposits or fill. The depressions appear to have been caused by settlement over improperly filled water-and-sewer line trenches. The overall relationship between geology and ground deformations as seen in this subdivision may be useful for predicting, and thereby reducing, damage for future subdivision projects. Journal of Geotechnical and Geoenvironmental Engineering ?? ASCE.

  16. Building America Case Study: New Town Builders' Power of Zero Energy Center, Denver, Colorado (Brochure)

    SciTech Connect

    Not Available

    2014-10-01

    New Town Builders, a builder of energy efficient homes in Denver, Colorado, offers a zero energy option for all the homes it builds. To attract a wide range of potential homebuyers to its energy efficient homes, New Town Builders created a 'Power of Zero Energy Center' linked to its model home in the Stapleton community of Denver. This case study presents New Town Builders' marketing approach, which is targeted to appeal to homebuyers' emotions rather than overwhelming homebuyers with scientific details about the technology. The exhibits in the Power of Zero Energy Center focus on reduced energy expenses for the homeowner, improved occupant comfort, the reputation of the builder, and the lack of sacrificing the homebuyers' desired design features to achieve zero net energy in the home. The case study also contains customer and realtor testimonials related to the effectiveness of the Center in influencing homebuyers to purchase a zero energy home.

  17. New Whole-House Solutions Case Study: A Production Builder's Passive House - Denver, Colorado

    SciTech Connect

    2015-05-01

    Brookfield Home’s first project is in a community called Midtown in Denver, Colorado, in which the builder took on the challenge of increased energy efficiency by creating a Passive House (PH)-certified model home. Brookfield worked with the U.S. Department of Energy’s Building America research team IBACOS to create the home, evaluate advanced building technologies, and use the home as a marketing tool for potential homebuyers. Brookfield also worked with KGA studio architects to create a new floor plan that would be constructed to the PH standard as an upgrade option.

  18. 78 FR 74162 - Sysco Denver LLC, a Subsidiary of Sysco Corporation, IT Department, Denver, Colorado; Notice of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-10

    ... Notice of determination was published in the Federal Register on October 24, 2013 (78 FR 63498). Workers... Employment and Training Administration Sysco Denver LLC, a Subsidiary of Sysco Corporation, IT Department... workers and former workers of Sysco Denver LLC., a subsidiary of Sysco Corporation, IT Department,...

  19. 76 FR 17444 - Notice of Inventory Completion: Colorado Historical Society (History Colorado), Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-29

    ... Ruin had multiple owners, including private citizens and the State of New Mexico. It is not known if... with the human remains should contact Bridget Ambler, Curator of Material Culture, Colorado...

  20. Geohydrology of the shallow aquifers in the Denver metropolitan area, Colorado

    USGS Publications Warehouse

    Robson, Stanley G.

    1996-01-01

    The Denver metropolitan area is underlain by shallow layers of water-bearing sediments (aquifers) consisting of unconsolidated gravel, sand, silt, and clay. The depth to water in these aquifers is less than 20 feet in much of the area, and the aquifers provide a ready source of water to numerous shallow, small-capacity wells. The shallow depth to water also makes the aquifers susceptible to contamination from the land surface. Water percolating downward from residential, commercial, and industrial property, spills of hazardous materials, and leaks from underground storage tanks and pipelines can cause contaminants to enter the shallow aquifers. Wet basements, unstable foundation materials, and waterlogged soils also are common in areas of very shallow ground water.Knowledge of the extent, thickness, and water-table altitude of the shallow aquifers is incomplete. This, coupled with the complexity of development in this large metropolitan area, makes effective use, management, and protection of these aquifers extremely difficult. Mapping of the geologic and hydrologic characteristics of these aquifers would provide the general public and technical users with information needed to better use, manage, and protect this water resource. A study to map the geohydrology of shallow aquifers in the Denver metropolitan area was begun in 1994. The work was undertaken by the U.S. Geological Survey in cooperation with the U.S. Army-Rocky Mountain Arsenal, U.S. Department of Energy-Rocky Flats Field Office, Colorado Department of Public Health and Environment, Colorado Department of Natural Resources-State Engineers Office, Denver Water Department, Littleton-Englewood Wastewater Treatment Plant, East Cherry Creek Valley Water and Sanitation District, Metro Wastewater Reclamation District, Willows Water District, and the cities of Aurora, Lakewood, and Thornton.This report presents the results of a systematic mapping of the extent, thickness, and water-table altitude of the shallow

  1. Median-permeability contour maps of the J sandstone, Dakota Group, in the Denver Basin, Colorado, Nebraska, and Wyoming

    USGS Publications Warehouse

    Higley, D.K.; Gautier, D.L.

    1986-01-01

    Permeability values compiled in this J sandstone study were determined from cores from 134 widely scattered boreholes. Median permeabilities, rather than average permeabilities, were used in order to minimize the effect of anomalous samples. Thirty-five oil companies and independent operators supplied core data. Core Laboratories of Denver, Colorado analyzed the core, which was submitted over a period of 25 years.

  2. Evaporation from seven reservoirs in the Denver water-supply system, central Colorado

    USGS Publications Warehouse

    Ficke, John F.; Adams, D. Briane; Danielson, T.W.

    1977-01-01

    Seven reservoirs in central Colorado, operated by the Denver Board of Water Commissioners, were studied during 1967-73 to determine evaporation losses. These reservoirs, Elevenmile Canyon, Dillon, Gross, Antero, Cheesman, Williams Fork, and Ralston, are located on both sides of the Continental Divide. Methods for computing evaporation include energy-budget, mass-transfer, and pan relationships. Three reservoirs, Elevenmile Canyon, Dillon, and Gross, had mass-transfer coefficients calibrated by energy-budget studies. At the remaining reservoirs, an empirical technique was used to estimate the mass-transfer coefficient. The enery-budget-calibrated methods give the most accurate evaporation values; the empirical coefficients give only a best estimate of evaporation. All reservoirs should be calibrated by energy-budget studies. The pan method of computing evaporation is the least reliable method because of problems of advected energy through the sides of the pan, representative pan exposure , and the irregularity of ratios of reservoir to pan evaporation. (Woodard-USGS)

  3. High-Penetration Photovoltaics Standards and Codes Workshop, Denver, Colorado, May 20, 2010: Workshop Proceedings

    SciTech Connect

    Coddington, M.; Kroposki, B.; Basso, T.; Lynn, K.; Herig, C.; Bower, W.

    2010-09-01

    Effectively interconnecting high-level penetration of photovoltaic (PV) systems requires careful technical attention to ensuring compatibility with electric power systems. Standards, codes, and implementation have been cited as major impediments to widespread use of PV within electric power systems. On May 20, 2010, in Denver, Colorado, the National Renewable Energy Laboratory, in conjunction with the U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE), held a workshop to examine the key technical issues and barriers associated with high PV penetration levels with an emphasis on codes and standards. This workshop included building upon results of the High Penetration of Photovoltaic (PV) Systems into the Distribution Grid workshop held in Ontario California on February 24-25, 2009, and upon the stimulating presentations of the diverse stakeholder presentations.

  4. Health-hazard evaluation report HETA 85-354-1872, Asarco, Denver, Colorado

    SciTech Connect

    Thun, M.J.; Osorio, A.M.; Schober, S.

    1988-02-01

    An evaluation was made of possible hazardous working conditions at the ASARCO Globe facility, Denver, Colorado. The facility was involved in the recovery of cadmium from baghouse dust, a waste byproduct of nonferrous smelters. A medical study of kidney function was conducted in 45 current or former cadmium production workers; results were compared to those for 35 hospital workers. Kidney abnormalities were more common and more severe in the cadmium workers than in the hospital workers. Abnormalities of proximal tubular function included reduced reabsorption of beta-2-microglobulin, retinol binding protein, calcium and phosphate. Glomerular dysfunction was evidenced as elevated serum creatinine. As length of exposure to cadmium increased, changes became more apparent in workers. No reversal of the conditions was noted in workers who had ceased to be exposed to cadmium some time before the study. The authors conclude that occupational overexposure to cadmium caused kidney disease in workers at the facility.

  5. Effects of autocorrelation upon LANDSAT classification accuracy. [Richmond, Virginia and Denver, Colorado

    NASA Technical Reports Server (NTRS)

    Craig, R. G. (Principal Investigator)

    1983-01-01

    Richmond, Virginia and Denver, Colorado were study sites in an effort to determine the effect of autocorrelation on the accuracy of a parallelopiped classifier of LANDSAT digital data. The autocorrelation was assumed to decay to insignificant levels when sampled at distances of at least ten pixels. Spectral themes developed using blocks of adjacent pixels, and using groups of pixels spaced at least 10 pixels apart were used. Effects of geometric distortions were minimized by using only pixels from the interiors of land cover sections. Accuracy was evaluated for three classes; agriculture, residential and "all other"; both type 1 and type 2 errors were evaluated by means of overall classification accuracy. All classes give comparable results. Accuracy is approximately the same in both techniques; however, the variance in accuracy is significantly higher using the themes developed from autocorrelated data. The vectors of mean spectral response were nearly identical regardless of sampling method used. The estimated variances were much larger when using autocorrelated pixels.

  6. Outbreak of Kawasaki syndrome in Denver, Colorado: association with rug and carpet cleaning.

    PubMed

    Rauch, A M; Glode, M P; Wiggins, J W; Rodriguez, J G; Hopkins, R S; Hurwitz, E S; Schonberger, L B

    1991-05-01

    Between October 1984 and January 1985, the largest outbreak of Kawasaki syndrome reported to date in the continental United States (62 cases) occurred in the Front Range of the Rocky Mountains, extending from Colorado Springs, Colorado, to Cheyenne, Wyoming. Fifty-two (84%) of these Kawasaki syndrome patients lived in the Denver metropolitan area. A case-control study revealed that 16 (62%) of 26 Kawasaki syndrome patients compared with 10 (20%) of 49 matched control subjects had a history of exposure to shampooed (19%) or spot-cleaned (81%) rugs or carpets within 30 days of the Kawasaki syndrome onset date (odds ratio = 5, P less than .01). The time of exposure to shampooed or spot-cleaned rugs or carpets for 9 of 10 Kawasaki syndrome patients who had a single exposure and for all 6 Kawasaki syndrome patients who had multiple exposures were clustered within an interval 13 to 30 days before the onset of illness. Although the reason for this unusually large outbreak remains obscure, it is the third in which a statistically significant association between Kawasaki syndrome and rug or carpet cleaning has been found.

  7. Outbreak of Kawasaki syndrome in Denver, Colorado: association with rug and carpet cleaning.

    PubMed

    Rauch, A M; Glode, M P; Wiggins, J W; Rodriguez, J G; Hopkins, R S; Hurwitz, E S; Schonberger, L B

    1991-05-01

    Between October 1984 and January 1985, the largest outbreak of Kawasaki syndrome reported to date in the continental United States (62 cases) occurred in the Front Range of the Rocky Mountains, extending from Colorado Springs, Colorado, to Cheyenne, Wyoming. Fifty-two (84%) of these Kawasaki syndrome patients lived in the Denver metropolitan area. A case-control study revealed that 16 (62%) of 26 Kawasaki syndrome patients compared with 10 (20%) of 49 matched control subjects had a history of exposure to shampooed (19%) or spot-cleaned (81%) rugs or carpets within 30 days of the Kawasaki syndrome onset date (odds ratio = 5, P less than .01). The time of exposure to shampooed or spot-cleaned rugs or carpets for 9 of 10 Kawasaki syndrome patients who had a single exposure and for all 6 Kawasaki syndrome patients who had multiple exposures were clustered within an interval 13 to 30 days before the onset of illness. Although the reason for this unusually large outbreak remains obscure, it is the third in which a statistically significant association between Kawasaki syndrome and rug or carpet cleaning has been found. PMID:2020511

  8. Data from core analyses, aquifer testing, and geophysical logging of Denver Basin bedrock aquifers at Castle Pines, Colorado

    USGS Publications Warehouse

    Robson, S.G.; Banta, E.R.

    1993-01-01

    This report contains data pertaining to the geologic and hydrologic characteristics of the bedrock aquifers of the Denver basin at a site near Castle Pines, Colorado. Data consist of a lithologic- description of about 2,400 ft of drill core and laboratory determinations of mineralogy, grain size, bulk and grain density, porosity, specific yield, and specific retention for selected core samples. Water-level data, atmospheric-pressure measurements, aquifer-compression measurements, and borehole geophysical logs also are included.

  9. Modeling Methane Leakage from Faulty Wellbores in the Denver-Julesburg Basin, Colorado

    NASA Astrophysics Data System (ADS)

    Lackey, G.; Rajaram, H.; Karra, S.; Sherwood, O.; Burke, T. L.

    2015-12-01

    Regulations in the state of Colorado mandate that all oil and gas wells be constructed with surface casings that extend 50 feet below the depth of the deepest potable aquifer, and production casings that are cemented to at least 200 feet above the shallowest producing formation. Building wells in accordance with the minimum regulations leaves an uncemented annulus between the production casing and the surrounding rock matrix, extending from the bottom of the surface casing to the top of the production casing cement. In Colorado, this annulus is sealed at the ground surface by the "bradenhead valve". Stray methane can enter the uncemented annulus through faulty cement in the producing formation or an intermediate gas-bearing zone and migrate upwards along the production casing. The gas dissolves into the annular fluid and accumulates below the bradenhead valve building pressure. Data from the Colorado Oil and Gas Conservation Commission (COGCC) indicates that 1,492 wells in the Denver-Julesburg (DJ) Basin have recorded bradenhead pressures greater than 20 psi since 2007. A leak of this kind creates the potential for both the single-phase transport of dissolved methane and the multiphase transport of methane gas away from the well. The degree to which methane transport occurs depends not only on the size of the leak but also the construction of the wellbore. In Colorado, the definition of potable groundwater has changed with time. To meet increasing demands for water, drinking water wells have been drilled deeper. As a result, there are potentially 4,144 wells in the DJ Basin with surface casings too shallow to protect the deepest potable aquifer. In this work, we investigate how a methane leak into the open annulus of an oil and gas wellbore, could result in the transport of dissolved and gas phase methane into a nearby drinking water aquifer. We construct a multiphase wellbore model that computes the pressure distribution and gas fraction along the uncemented

  10. Hydrogeology of and potential mining impacts on strippable lignite areas in the Denver Aquifer, east-central Colorado

    USGS Publications Warehouse

    Driver, N.E.; Williams, R.S.

    1986-01-01

    This study describes the hydrogeology of and potential impacts of mining on strippable lignite areas in the Denver aquifer in the east-central Colorado plains. Strippable lignitic coal seams , 20 to 60 ft thick, are present in the Denver Formation. The Denver aquifer, the saturated part of the Denver Formation, is likely to be affected locally by surface mining of lignite. Transmissivity of the aquifer in the study area ranges from 145 to 1,000 mg/L to the northeast in the study area as, hydraulic head decreases from 6,600 to 5,400 ft. Distance-drawdown curves show the extent of water level drawdown near a dewatered surface mine. After reclamation of the lignite mine pit, flow through the lignite spoil pile may increase the dissolved solids concentrations in the Denver aquifer. This increase could occur, because, as water from rain and overland flow percolates through the newly-exposed rock surfaces in the spoil material, minerals from the overburden can be dissolved in the water, which then joins with water from the aquifer. This increase could locally change streams, springs, and alluvial and bedrock aquifers. (USGS)

  11. The quality of our Nation's waters: water quality in the Denver Basin aquifer system, Colorado, 2003-05

    USGS Publications Warehouse

    Bauch, Nancy J.; Musgrove, Marylynn; Mahler, Barbara J.; Paschke, Suzanne

    2015-01-01

    Availability and sustainability of groundwater in the Denver Basin aquifer system depend on water quantity and water quality. The Denver Basin aquifer system underlies about 7,000 square miles of the Great Plains in eastern Colorado and is the primary or sole source of water for domestic and public supply in many areas of the basin. Use of groundwater from the Denver Basin sandstone aquifers has been instrumental for development of the south Denver metropolitan area and other areas, but has resulted in a decline in water levels in some parts of the system. Human activities in many areas have adversely affected the quality of water in the aquifer system, especially the shallow parts. Groundwater in deeper parts of the system used for drinking water, once considered isolated from the effects of overlying land use, is increasingly vulnerable to contamination from human activities and geologic materials. Availability and sustainability of high-quality groundwater are vital to the economic health of the Denver Basin area.

  12. Hydrologic effects of pumpage from the Denver basin bedrock aquifers of northern El Paso County, Colorado

    USGS Publications Warehouse

    Banta, E.R.

    1989-01-01

    The Denver groundwater basin underlies a 6,700 sq-mi area in eastern Colorado. To assess current conditions of the four bedrock aquifers in the basin, water levels, streamflow gain and loss, and other data were collected. Current aquifer conditions in the southern part of the basin and likely response to various 100-year pumping scenarios were analyzed using a digital finite-difference model. Simulated predevelopment flow through the bedrock aquifers was about 59 cu ft/sec. Water level changes between 1978 and 1985, likely caused by variations in precipitation and in pumping and by lowering of the water table in the overlying Black Squirrel Creek alluvial aquifer, ranged from rises of more than 40 ft to declines of as much as 80 ft. In 1985, pumping from the bedrock aquifers was about 56 cu ft/sec. Simulations indicate that 43% of the pumpage came from a decrease in volume of groundwater in storage; 37% came from induced recharge and captured discharge. The remaining 20% came from a transient high rate of recharge from precipitation. A baseline 100-yr simulation, beginning in 1985, indicated minimal drawdowns for constant pumping at 1985 rates in the southern part of the basin. Other simulations indicated that the pumpage required to supply the needs of the projected population would be accompanied by drawdowns of as much as 1,300 ft and by large decreases in amount of groundwater in storage. Pumpage from a hypothetical well field, located where the aquifers are thickest , and from the aquifers underlying Colorado Springs also was simulated. (USGS)

  13. Hydrologic data for the drainage basins of Chatfield and Cherry Creek Lakes, Denver metropolitan area, Colorado

    USGS Publications Warehouse

    Gibbs, J.W.; Arnold, L.M.; Reed, R.L.

    1983-01-01

    Chatfield and Cherry Creek Lakes are flood control lakes constructed by the U.S. Army Corps of Engineers and leased to the Colorado Division of Parks and Recreation. Both lakes are in the Denver metropolitan area and provide a variety of recreational activities, including boating, camping, fishing, picnicking, and swimming. The projected increase of urban development in the drainage basins of Chatfield and Cherry Creek lakes could increase the constituent loads delivered to the lakes. Due to the eutrophic condition of Cherry Creek Lake and the potential eutrophic condition of Chatfield Lake, increased constituent loads could affect the suitability of the lakes for recreation. A monitoring program was started to determine the constituent loads of the drainage basins to both lakes. A network of monitoring stations was established to collect ambient water quality samples, storm runoff water quality samples, precipitation, and stream discharge. In the Cherry Creek basin 12 observation wells were established in the alluvium upgradient from Cherry Creek lake. Water levels and water quality data were collected to determine the quantity and quality of groundwater entering Cherry Creek lake. Data were collected from January through December 1982. The data may be used to evaluate the present and projected impact of urbanization in the drainage basins and the effect of increased constituent loads delivered to Chatfield and Cherry Creek lakes. (Author 's abstract)

  14. Water-quality data for Arvada Reservoir, Denver metropolitan area, Colorado

    USGS Publications Warehouse

    Britton, L.J.; Gaggiani, N.G.

    1986-01-01

    Physical, chemical, and biological water quality data were collected and compiled for five sites in Arvada Reservoir, one site in Ralston Creek, and two sites in Croke Canal, in the Denver metropolitan area, Colorado. The purpose of the data collection was to determine the water quality of Arvada Reservoir, evaluate the effect of source waters on the reservoir , and determine the trophic state of the reservoir. Data collected include reservoir profile measurements with depth and inflow measurements of water temperature, specific conductance, dissolved oxygen, and pH. Secchi disk depth measurements also are reported. In addition, water samples were analyzed periodically for concentrations of major chemical constituents, nutrients, trace elements, and selected radiochemicals; for densities and relative abundance of phytoplankton and zooplankton; and for concentrations of chlorophyll alpha. Results of algal growth potential determinations are included. This report describes sampling site locations and methods of data collection and analyses and presents qualitative and quantitative results of water quality data collected during the study. Sampling began during June 1983 and continued through September 1985. (USGS)

  15. Water Sources and Quantity for Energy Development in Colorado's Denver-Julesburg Basin

    NASA Astrophysics Data System (ADS)

    Waskom, R.; Kallenberger, J.; Boone, K.; Plombon, B.; Ryan, J. N.

    2014-12-01

    Over the past decade, Colorado has experienced a significant rise in oil and gas development with the greatest concentration of activity occurring in the Denver-Julesburg Basin (DJB) in the Northeast corner of the state. According to the Colorado Oil and Gas Association, as of June 2014, there are approximately 52,200 active oil and gas wells statewide, with over 21,300 located in Weld County, the epicenter of the DJB. In this water-scarce region, much attention is paid to the source and quantity of water being used to produce energy. This information is not readily accessible, but is of great importance to many. In response, our research team is undertaking an evaluation of water quantity impacts and tradeoffs associated with oil and gas development. Technological advancements in horizontal drilling and hydraulic fracturing require additional sources of water - about 2.8 million gallons of per well (Goodwin et al.). The statewide water use for hydraulic fracturing is estimated to be less than 0.1%; however, on a local scale, when water is transferred from agricultural and municipal uses to industrial use, there are economic, environmental and social tradeoffs. Unfortunately, the pathway of a particular water transfer and its associated tradeoffs can be difficult to predict and quantify, further complicating the ability of local and state stakeholders to make sound and informative decisions about energy development. Energy companies are implementing new strategies to ensure reliable water supplies for their operations. These include tapping into non-tributary aquifers to help reduce competition for fully appropriated surface and tributary groundwater sources and recycling and reusing wastewater that results from the drilling and extraction practices. Many conflicting perspectives shape the water-energy discussion in the DJB so non-biased scientific data plays an important role in addressing the questions surrounding water use for energy development. This

  16. Outbreak of Escherichia coli 0157:H7 Associated with Attencdance at a Large Livestock Exhibition - Denver, Colorado, January-February 2009

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Outbreak of Escherichia coli O157:H7 associated with attendance at a large livestock exhibition – Denver, Colorado, January-February 2009 Nicole Comstock1, Hugh Maguire1, Abby Bronken2, Carol McDonald3, Donna Hite-Bynum4, Mary Kate Cichon1, Lisa Durso5 1 Colorado Department of Public Health and En...

  17. Hydrologic data for urban storm runoff in the Denver metropolitan area, Colorado

    USGS Publications Warehouse

    Gibbs, Johnnie W.; Doefer, John T.

    1982-01-01

    Urban storm-runoff data collected from April through September 1981 from nine Denver Nationwide Urban Runoff Program sites, urban storm-runoff data collected from April 1980 through September 1981 from ten South Platte River Study sites, and rainfall-runoff simulation data from two sites for June 1980 and May 1981 are presented in this report. The Denver Nationwide Urban Runoff Program sites were two single-family residential areas, two multifamily residential areas, one commercial area (shopping center), one mixed commercial and multifamily residential area, one natural area (open space), and two detention ponds. The South Platte River Study sites were six tributaries of the South Platte River and four instream sites on the South Platte River. The tributary sites were Bear Creek at mouth, at Sheridan; Harvard Gulch at Harvard Park, at Denver; Sanderson Gulch at mouth, at Denver; Weir Gulch at mouth, at Denver; Lakewood Gulch at mouth, at Denver; and Cherry Creek at Denver. The instream sites were South Platte River at Littleton; South Platte River at Florida Avenue, at Denver; South Platte River at Denver; and South Platte River at 50th Avenue, at Denver. The rainfall-runoff simulation sites were North Avenue at Denver Federal Center, at Lakewood and Rooney Gulch at Rooney Ranch, near Morrison. Precipitation, rainfall-runoff, water-quality data, and basin characteristics were collected at the urban storm-runoff sites. The urban storm-runoff data may be used to characterize runoff loading for various land-use types in Denver and other semiarid regions. (USGS)

  18. Summary and Evaluation of the Quality of Stormwater in Denver, Colorado, October 2001 to October 2005

    USGS Publications Warehouse

    Bossong, Clifford R.; Fleming, Andrea C.

    2008-01-01

    amount of urban land cover was identified using data available from the U.S. Geological Survey National Land Cover data. Results from 22 discrete samples collected during two storms and used to obtain composited results with various weighting methods indicate that correlation coefficients between time-weighted and volume-weighted concentrations were generally at least 0.65, indicating a strong direct correlation between the two weighting methods for the stations involved in this study. In addition, the central tendency for relative percent differences between the time- and volume-weighting methods typically has an absolute value of about 10 or less, indicating good agreement for these weighting methods for data collected as part of this study. Comparison of stormwater results to numeric standards for streams developed by the Colorado Department of Public Health and Environment on the basis of use classifications indicates that, for water-quality properties and constituents other than bacteriological indicators, there were very few exceptions to numeric standards. Bacteriological indicators, however, such as Escherichia coli and fecal coliform consistently exceeded numeric standards in all bacteriological samples. An evaluation of laboratory results from composite samples on the basis of annual means indicates the presence of some simple upward and downward temporal trends in concentrations. In general, for annual means of results for all stations, hardness, ammonia plus organic nitrogen, total phosphorus, most dissolved metals (lead, manganese, and zinc), and all total metals (copper, lead, manganese, and zinc) all indicate annual means that decrease each year, or downward trends. Some trends were indicated only at individual stations in the network rather than at all stations. Ammonia as nitrogen at Union, Denver, and Henderson, orthophosphate at Sand Creek, and nitrite plus nitrate at Denver and Henderson all indicate decreasing annual means, or downward tr

  19. Summary and evaluation of the quality of stormwater in Denver, Colorado, 2006-2010

    USGS Publications Warehouse

    Stevens, Michael R.; Slaughter, Cecil B.

    2012-01-01

    , samples collected at Toll Gate Creek above 6th Avenue at Aurora station, Sand Creek at mouth near Commerce City station, and the South Platte River at Henderson station, each had about 30 to 50 percent exceedances of both acute and chronic dissolved manganese standards. Of the samples collected at Sand Creek at mouth near Commerce City, 1 sample exceeded the acute standard and 4 samples exceeded the chronic standard for dissolved zinc, but no samples collected from the other sites exceeded either standard for zinc. Almost all samples of stormwater analyzed for Escherichia coli exceeded Colorado numeric standards. A numerical standard for fecal coliform is no longer applicable as of 2004. Results from the 2002-2005 study indicated that the general quality of stormwater had improved during 2002-2005 compared to 1998-2001, having fewer exceedances of Colorado standards, and showing downward trends for many water-quality values and concentrations. These trends coincided with general downward or relatively similar mean streamflows for the 2002-2005 compared to 1998-2001, which indicates that dilution may be a smaller influence on values and concentrations than other factors. For this report, downward trends were indicated for many constituents at each station during 2006-2010 compared to 2002-2005. The trends for mean streamflow for 2006-2010 compared to 2002-2005 are upward at all sites except for the South Platte River at Henderson, indicating that dilution by larger flows could be a factor in the downward concentration trends. At the South Platte River below Union Avenue station, downward trends were indicated for hardness, dissolved ammonia, dissolved orthophosphate, and dissolved copper. Upward trends at South Platte River below Union Avenue were indicated for pH. At the South Platte River at Denver station, downward trends were indicated for total ammonia plus organic nitrogen, dissolved ammonia, dissolved nitrite plus nitrate, dissolved orthophosphate, total phosphorus

  20. Depositional systems of Fountain formation and its basinal equivalents, northwestern Denver Basin, Colorado

    SciTech Connect

    Napp, K.F.; Ethridge, F.G.

    1985-05-01

    The objective of this study is to provide a better understanding of the depositional systems of the Pennsylvanian Fountain Formation in north-central Colorado. The study area is bounded by T4N, T11N, R66W, and R70W, encompassing portions of the foothills outcrop belt and the Denver basin. The sedimentary sequence observed in surface exposures displays little vertical variation. It is composed of vertically stacked, fining-upward, gravel to siltstone and mudstone cycles containing trough and planar cross-beds, horizontal beds, root structures, and nodular limestone. This succession represents deposition in Donjek-type braided streams and abandoned channel-fill sequences, and the development of soil horizons on a subaerial alluvial fan or alluvial plain. In the subsurface, the vertical succession begins with a basal course-grained 140-ft (43-m) thick interval that is identical on the rocks found in surface outcrops to the west. This interval is overlain be 410 ft (125 m) of red shale, siltstone, sandstone, and fossilferous limestone that grades eastward into black organic shale and limestone. Capping the sequence is a 500-ft (152 m) interval of red shale, siltstone, sandstone, gypsum- and anhydrite-bearing dolomites and fossiliferous limestones that interfinger with typical Fountain coarse-grained terrigenous clastics. This vertical succession of Fountain rocks in the subsurface suggests the following sequence of depositional systems from base to top: alluvial fan and braided alluvial plain, fan deltas, and small interfan embayments that grade eastward into a normal-salinity marine shoreface and an offshore hypersaline carbonate shelf. Normal salinity marine conditions were probably maintained in the parallic zone by the influx of ancestral Front Range runoff.

  1. Understanding the Charter School Special Education Gap: Evidence from Denver, Colorado

    ERIC Educational Resources Information Center

    Winters, Marcus A.

    2014-01-01

    Center on Reinventing Public Education (CRPE) commissioned Dr. Marcus Winters to analyze the factors driving the special education gap between Denver's charter and traditional public elementary and middle schools. Using student-level data, Winters shows that Denver's special education enrollment gap starts at roughly 2 percentage points…

  2. Eldorado Springs member of the Skull Creek Shale in the Denver Basin, Colorado

    SciTech Connect

    Dubois, D.P.

    1996-07-01

    The Eldorado Springs Sandstone crops out at the west edge of the Denver Basin and is mapped in the subsurface as an elongate linear sand body that extends at least 70 mi east-southeast of the outcrop. Along its axis, the sand body thickness ranges from 63 ft at the type section to about 25 ft on the east side of the study area. North of the axis, the sandstone thins as the base interfingers with the Lower Cretaceous Skull Creek Shale. To the south of the main axis, the sand interfingers with silty facies. The Eldorado Springs displays a cleaning upward signature, and is thought to have been deposited in an offshore bar sub-parallel to shoreline. The eastward thinning of the sand body suggests an orientation oblique to the Skull Creek shoreline, the thinner end being farther from shore. The overlying Skull Creek Shale thins over this sand body. This subtle paleotopographic effect persisted through the close of Muddy (J) time. The Eldorado Springs consists of very fine- to fine-grained siliceous sandstone with low porosity and permeability. Pore-lining clays that locally bridge pore throats and variable amounts of silica and ankerite cement reduce reservoir quality. this unit is not considered a good stand-alone target for hydrocarbon exploration but instead as a potential secondary pay in wells with primary pay in the D or Muddy (J). Production has been established from this unit in a well located in Sec. 20, T4S, R63W. A large part of this thick and laterally continuous sandstone body falls within the window of the basin center hydrocarbon trap. The Eldorado Springs Member offers a potentially large hydrocarbon resource that is virtually untapped.

  3. Characteristics of urban-ecosystem atmosphere fluxes of CO2, CH4, N2O, and et over Denver, Colorado

    USGS Publications Warehouse

    Anderson, D.E.; Alvarez, C.; Thienelt, T.

    2004-01-01

    The characteristics of urban ecosystems fluxes of carbon dioxide, methane, nitrous oxide, and evapotranspiration (ET) over Denver, Colorado were discussed. These atmospheric fluxes were measured using a methodology that included a combination of eddy covariance sensors at two levels on a tall tower and chamber measurements at 33 locations on the soil surface. There was both strong temporal and spatial heterogeneity of fluxes owing to characteristics of natural and anthropogenic ecosystem components. Although the urban ecosystem was a net carbon dioxide source, tower-based eddy covariance measurements showed it to be a net vegetative sink during the majority of mid-say summer hours.

  4. A preliminary report on a zone containing thick lignite beds, Denver Basin, Colorado

    USGS Publications Warehouse

    Soister, Paul E.

    1973-01-01

    A zone of lignite beds of Paleocene age in the Denver Formation (Upper Cretaceous and Paleocene) lies about 800-1,500 feet above the well-known and extensively mined coal beds of the Laramie Formation (Upper Cretaceous). The zone is a few hundred to as much as 500 feet thick. Where lignite beds lie within 1,000 feet of the surface, this zone underlies an area about 30 miles wide by about 75 miles long, stretching from just northeast of Denver to several miles south of Calhan. Fifteen mines were operated at various periods between 1874 and 1940 and probably produced a total of less than 100,000 tons of lignite, mostly for local use. From 1874 to 1974, several geologists have reported on this lignite zone or the enclosing beds, but no detailed reports have been written except for one by this writer. Drill holes are the main source of geologic data, owing to poor exposure. There are generally about 3 to 6 lignite beds, and they are mostly about 15 or 20 to a few tens of feet apart. Most or all beds typically contain numerous non-coal partings from a fraction of an inch to several inches thick, so that thickness of lignite beds should be stated as gross thickness and as net lignite thickness; net lignite thickness is generally from 70 to 90 percent of gross thickness. Many partings are composed of kaolin, but others are composed of other clay minerals, siltstone, and sandstone. The lignite beds range generally from 1 or 2 to several feet thick, and some are as much as 10-25 feet thick; the thickest known bed has a maximum thickness of 54.5 feet, with a net lignite thickness of 40 feet. Most lignite beds seem to have fair lateral continuity, and at least some beds are several miles in extent. The thickest known lignite bed was traced for at least 18 miles, from northwest to southeast of Watkins. The lignite is brownish-black to black, weathers, checks, and disintegrates rapidly, and even in drill cores from a few hundred feet in depth the lignite is easily broken by

  5. Gas, water, and oil production from Wattenberg field in the Denver Basin, Colorado

    USGS Publications Warehouse

    Nelson, Philip H.; Santus, Stephen L.

    2011-01-01

    Gas, oil, and water production data were compiled from selected wells in two tight gas reservoirs-the Codell-Niobrara interval, comprised of the Codell Sandstone Member of the Carlile Shale and the Niobrara Formation; and the Dakota J interval, comprised mostly of the Muddy (J) Sandstone of the Dakota Group; both intervals are of Cretaceous age-in the Wattenberg field in the Denver Basin of Colorado. Production from each well is represented by two samples spaced five years apart, the first sample typically taken two years after production commenced, which generally was in the 1990s. For each producing interval, summary diagrams and tables of oil-versus-gas production and water-versus-gas production are shown with fluid-production rates, the change in production over five years, the water-gas and oil-gas ratios, and the fluid type. These diagrams and tables permit well-to-well and field-to-field comparisons. Fields producing water at low rates (water dissolved in gas in the reservoir) can be distinguished from fields producing water at moderate or high rates, and the water-gas ratios are quantified. The Dakota J interval produces gas on a per-well basis at roughly three times the rate of the Codell-Niobrara interval. After five years of production, gas data from the second samples show that both intervals produce gas, on average, at about one-half the rate as the first sample. Oil-gas ratios in the Codell-Niobrara interval are characteristic of a retrograde gas and are considerably higher than oil-gas ratios in the Dakota J interval, which are characteristic of a wet gas. Water production from both intervals is low, and records in many wells are discontinuous, particularly in the Codell-Niobrara interval. Water-gas ratios are broadly variable, with some of the variability possibly due to the difficulty of measuring small production rates. Most wells for which water is reported have water-gas ratios exceeding the amount that could exist dissolved in gas at reservoir

  6. Shallow ground-water quality beneath a major urban center: Denver, Colorado, USA

    USGS Publications Warehouse

    Bruce, B.W.; McMahon, P.B.

    1996-01-01

    A survey of the chemical quality of ground water in the unconsolidated alluvial aquifer beneath a major urban center (Denver, Colorado, USA) was performed in 1993 with the objective of characterizing the quality of shallow ground-water in the urban area and relating water quality to land use. Thirty randomly selected alluvial wells were each sampled once for a broad range of dissolved constituents. The urban land use at each well site was sub- classified into one of three land-use settings: residential, commercial, and industrial. Shallow ground-water quality was highly variable in the urban area and the variability could be related to these land-use setting classifications. Sulfate (SO4) was the predominant anion in most samples from the residential and commercial land-use settings, whereas bicarbonate (HCO3) was the predominant anion in samples from the industrial land-use setting, indicating a possible shift in redox conditions associated with land use. Only three of 30 samples had nitrate concentrations that exceeded the US national drinking-water standard of 10 mg l-1 as nitrogen, indicating that nitrate contamination of shallow ground water may not be a serious problem in this urban area. However, the highest median nitrate concentration (4.2 mg l-1) was in samples from the residential setting, where fertilizer application is assumed to be most intense. Twenty-seven of 30 samples had detectable pesticides and nine of 82 analyzed pesticide compounds were detected at low concentrations, indicating that pesticides are widely distributed in shallow ground water in this urban area. Although the highest median total pesticide concentration (0.17 ??g l-1) was in the commercial setting, the herbicides prometon and atrazine were found in each land-use setting. Similarly, 25 of 29 samples analyzed had detectable volatile organic compounds (VOCs) indicating these compounds are also widely distributed in this urban area. The total VOC concentrations in sampled wells

  7. An evaluation of rainfall-runoff data for the Denver Federal Center, Lakewood, Jefferson County, Colorado

    USGS Publications Warehouse

    Jarrett, R.D.; Veenhuis, J.E.

    1984-01-01

    An investigation was made to monitor the storm runoff in McIntyre Gulch basin to determine the rainfall-runoff chracteristics. Results may now be used to evaluate the effects of future development on storm runoff from the Denver Federal Center, which is located in the McIntyre Gulch basin in Lakewood , CO. Rainfall and runoff data were collected at eight streamflow stations and three auxiliary rainfall stations in and adjacent to the Denver Federal Center. The outflow peak discharges from McIntyre Gulch in the Denver Federal Center were higher than the inflow peak discharges for eight of the storms by an average of 38 percent. Outflow peak discharges for eight of the storms were lower by an average of 12 percent. The study demonstrated that runoff varies with location of a storm--even for a relatively small basin. Peak discharges of McIntyre Gulch outflow from the Denver Federal Center were 27 percent greater than the inflow for all storms, but only 15 percent greater for evenly distributed storms. Runoff from the Denver Federal Center increased storm-runoff volumes in McIntyre Gulch by an average of 46 percent. Proper management of storm runoff in the Denver Federal Center requires that proposed improvements to the existing storm-runoff system maintain peak flows at their present levels. (USGS)

  8. Alluvial and bedrock aquifers of the Denver Basin; eastern Colorado's dual ground-water resource

    USGS Publications Warehouse

    Robson, Stanley G.

    1989-01-01

    Large volumes of ground water are contained in alluvial and bedrock aquifers in the semiarid Denver basin of eastern Colorado. The bedrock aquifer, for example, contains 1.2 times as much water as Lake Erie of the Great Lakes, yet it supplies only about 9 percent of the ground water used in the basin. Although this seems to indicate underutilization of this valuable water supply, this is not necessarily the case, for many factors other than the volume of water in the aquifer affect the use of the aquifer. Such factors as climatic conditions, precipitation runoff, geology and water-yielding character of the aquifers, water-level conditions, volume of recharge and discharge, legal and economic constraints, and water-quality conditions can ultimately affect the decision to use ground water. Knowledge of the function and interaction of the various parts of this hydrologic system is important to the proper management and use of the ground-water resources of the region. The semiarid climatic conditions on the Colorado plains produce flash floods of short duration and large peak-flow rates. However, snowmelt runoff from the Rocky Mountains produces the largest volumes of water and is typically of longer duration with smaller peak-flow rates. The alluvial aquifer is recharged easily from both types of runoff and readily stores and transmits the water because it consists of relatively thin deposits of gravel, sand, and clay located in the valleys of principal streams. The bedrock aquifer is recharged less easily because of its greater thickness (as much as 3,000 feet) and prevalent layers of shale which retard the downward movement of water in the formations. Although the bedrock aquifer contains more than 50 times as much water in storage as the alluvial aquifer, it does not store and transmit water as readily as the alluvial aquifer. For example, about 91 percent of the water pumped from wells is obtained from the alluvial aquifer, yet water-level declines generally have

  9. Shallow ground-water quality beneath a major urban center: Denver, Colorado, USA

    NASA Astrophysics Data System (ADS)

    Bruce, Breton W.; McMahon, Peter B.

    1996-11-01

    A survey of the chemical quality of ground water in the unconsolidated alluvial aquifer beneath a major urban center (Denver, Colorado, USA) was performed in 1993 with the objective of characterizing the quality of shallow ground-water in the urban area and relating water quality to land use. Thirty randomly selected alluvial wells were each sampled once for a broad range of dissolved constituents. The urban land use at each well site was sub-classified into one of three land-use settings: residential, commercial, and industrial. Shallow ground-water quality was highly variable in the urban area and the variability could be related to these land-use setting classifications. Sulfate (SO 4) was the predominant anion in most samples from the residential and commercial land-use settings, whereas bicarbonate (HCO 3) was the predominant anion in samples from the industrial land-use setting, indicating a possible shift in redox conditions associated with land use. Only three of 30 samples had nitrate concentrations that exceeded the US national drinking-water standard of 10 mg l -1 as nitrogen, indicating that nitrate contamination of shallow ground water may not be a serious problem in this urban area. However, the highest median nitrate concentration (4.2 mg l -1) was in samples from the residential setting, where fertilizer application is assumed to be most intense. Twenty-seven of 30 samples had detectable pesticides and nine of 82 analyzed pesticide compounds were detected at low concentrations, indicating that pesticides are widely distributed in shallow ground water in this urban area. Although the highest median total pesticide concentration (0.17 μg l -) was in the commercial setting, the herbicides prometon and atrazine were found in each land-use setting. Similarly, 25 of 29 samples analyzed had detectable volatile organic compounds (VOCs) indicating these compounds are also widely distributed in this urban area. The total VOC concentrations in sampled wells

  10. Bedrock aquifers and population growth in the Denver Basin, Colorado, USA

    USGS Publications Warehouse

    Moore, J.E.; Raynolds, R.G.; Dechesne, M.

    2007-01-01

    The Denver Basin bedrock aquifer system consists of Tertiary and Cretaceous age sedimentary rocks known as the Dawson, Denver, Arapahoe and Laramie-Fox Hills aquifers. The number of bedrock wells has increased from 12,000 in 1985 to over 33,700 in 2001 and the withdrawal of groundwater has caused water level declines in excess of 75 meters. Water level declines now range from 3 to 12 meters per year in the critical Arapahoe Aquifer. The groundwater supplies were once thought to be sufficient for 100 years but there is concern that they may be depleted in 10 to 15 years in areas on the west side of the basin. Groundwater is being mined from the aquifer system because the withdrawal through wells exceeds the rate of recharge. Increased groundwater withdrawal will cause further water level declines, increased costs to pump groundwater, and reduced yield from existing wells. In the Denver Basin, hydrologists have some capability to monitor declines in water levels for the Arapaho Aquifer, but generally have a limited ability to monitor water use. More complete and accurate water use data are needed to predict groundwater longevity for the Arapahoe Aquifer. The life of the Arapahoe Aquifer can be extended with artificial recharge using imported surface water, water reuse, restrictions on lawn watering, well permit restrictions and other conservation measures. Availability of groundwater may limit growth in the Denver Basin over the next 20 years unless residents are willing to pay for additional new sources of supply.

  11. 77 FR 42510 - Notice of Inventory Completion: History Colorado, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-19

    ... identified as Office of Archaeology and Historic Preservation (OAHP) Case Number 282. Osteological analysis..., on file with the Colorado Office of Archaeology and Historic Preservation). OAHP 282 was...

  12. New Whole-House Solutions Case Study: New Town Builders' Power of Zero Energy Center - Denver, Colorado

    SciTech Connect

    2014-10-01

    New Town Builders, a builder of energy efficient homes in Denver, Colorado, offers a zero energy option for all the homes it builds. To attract a wide range of potential homebuyers to its energy efficient homes, New Town Builders created a "Power of Zero Energy Center" linked to its model home in the Stapleton community. This case study presents New Town Builders' marketing approach, which is targeted to appeal to homebuyers' emotions rather than overwhelming homebuyers with scientific details about the technology. The exhibits in the Power of Zero Energy Center focus on reduced energy expenses for the homeowner, improved occupant comfort, the reputation of the builder, and the lack of sacrificing the homebuyers' desired design features to achieve zero net energy in the home. This case study also contains customer and realtor testimonials related to the effectiveness of the Center in influencing homebuyers to purchase a zero energy home.

  13. Hydrologic data for urban storm runoff from three localities in the Denver metropolitan area, Colorado

    USGS Publications Warehouse

    Ellis, Sherman R.

    1978-01-01

    Urban storm-runoff data, collected from 1975 to 1977, on three catchment areas in the Denver, Colo., metropolitan area are presented. The catchment are predominantly a single-family residential catchment area in Littleton, a multifamily residential and commercial catchment area in Lakewood, and a high-density residential and commercial catchment area in Denver. Precipitation, rainfall-runoff, snowmelt-runoff, water-quality (common constituents, nutrients, biochemical oxygen demand, coliform bacteria, and solids, trace elements, and pesticides), and catchment-area data are necessary to use the U.S. Environmental Protection Agency 's Storm Water Management Model II. The urban storm-runoff data may be used by planning, water-management, and environmental-protection agencies to assess the impact of urban storm runoff on the hydrologic system. (Woodard-USGS)

  14. Hydrologic data for urban storm runoff from nine sites in the Denver metropolitan area, Colorado

    USGS Publications Warehouse

    Gibbs, Johnnie W.

    1981-01-01

    Urban storm-runoff data were collected April through September 1980, from nine urbanrunoff sites in the Denver metropolitan area, and are presented in this report. The sites consist of two single-family residential areas, two multi-family residential areas, one commercial area (shopping center), one mixed commercial and multi-family residential area, one native area (open space), and two detention ponds. Precipitation, rainfall-runoff, water-quality (common constituents, nutrients, coliform bacteria, solids, and trace elements) and basin-area data are necessary to use the U.S. Geological Survey 's Distributed Routing Rainfall-Runoff Model, Version II. The urban storm-runoff data may be used to characterize runoff pollution loading for various land-use types in Denver and other semi-arid regions. (USGS)

  15. Geologic Map of the Denver West 30' x 60' Quadrangle, North-Central Colorado

    USGS Publications Warehouse

    Kellogg, Karl S.; Shroba, Ralph R.; Bryant, Bruce; Premo, Wayne R.

    2008-01-01

    The Denver West quadrangle extends east-west across the entire axis of the Front Range, one of numerous uplifts in the Rocky Mountain region in which Precambrian rocks are exposed. The history of the basement rocks in the Denver West quadrangle is as old as 1,790 Ma. Along the east side of the range, a sequence of sedimentary rocks as old as Pennsylvanian, but dominated by Cretaceous-age rocks, overlies these ancient basement rocks and was upturned and locally faulted during Laramide (Late Cretaceous to early Tertiary) uplift of the range. The increasingly coarser grained sediments up section in rocks of latest Cretaceous to early Tertiary age record in remarkable detail this Laramide period of mountain building. On the west side of the range, a major Laramide fault (Williams Range thrust) places Precambrian rocks over Cretaceous sedimentary rocks. The geologic history of the quadrangle, therefore, can be divided into four major periods: (1) Proterozoic history, (2) Pennsylvanian to pre-Laramide, Late Cretaceous history, (3) Late Cretaceous to early Tertiary Laramide mountain building, and (4) post-Laramide history. In particular, the Quaternary history of the Denver West quadrangle is described in detail, based largely on extensive new mapping.

  16. Groundwater levels in the Denver Basin bedrock aquifers of Douglas County, Colorado, 2011-2013

    USGS Publications Warehouse

    Everett, Rhett

    2014-01-01

    Manual and automated (time-series) water-level data collection from these sites between 2011 and 2013 showed water level declines in 36 wells. Over the 2-year monitoring period, average declines of approximately 0.4 foot per year were observed in the upper Dawson aquifer, declines of over 2.6 feet per year were observed in the lower Dawson aquifer, declines of about 3.2 feet per year were observed in the Denver aquifer, declines of about 1.9 feet per year were observed in the Arapahoe aquifer, and declines of about 9.9 feet per year were observed in the Laramie-Fox Hills aquifer.

  17. Generalized surficial geologic map of the Denver 1 degree by 2 degrees quadrangle, Colorado

    USGS Publications Warehouse

    Moore, D.W.; Straub, A.W.; Berry, M.E.; Baker, M.L.; Brandt, T.R.

    2000-01-01

    Thirty-nine types of surficial geologic deposits and residual materials of Quaternary age are described and mapped in the greater Denver area, in part of the Front Range, and in the piedmont and plains east of Denver, Boulder, and Castle Rock. Descriptions appear in the pamphlet that accompanies the map. Landslide deposits, colluvium, residuum, alluvium, and other deposits or materials are described in terms of predominant grain size, mineral or rock composition (e.g., gypsiferous, calcareous, granitic, andesitic), thickness of deposits, and other physical characteristics. Origins and ages of the deposits and geologic hazards related to them are noted. Many lines between geologic units on our map were placed by generalizing contacts on published maps. However, in 1997-1999 we mapped new boundaries, as well. The map was projected to the UTM projection. This large map area extends from the Continental Divide near Winter Park and Fairplay (on the west edge), eastward about 107 mi (172 km); and extends from Boulder on the north edge to Woodland Park at the south edge (68 mi; 109 km).

  18. Effects of the May 5-6, 1973, storm in the Greater Denver area, Colorado

    USGS Publications Warehouse

    Hansen, Wallace R.

    1973-01-01

    Rain began falling on the Greater Denver area the evening of Saturday, May 5, 1973, and continued through most of Sunday, May 6. Below about 7,000 feet altitude, the precipitation was mostly rain; above that altitude, it was mostly snow. Although the rate of fall was moderate, at least 4 inches of rain or as much as 4 feet of snow accumulated in some places. Sustained precipitation falling at a moderate rate thoroughly saturated the ground and by midday Sunday sent most of the smaller streams into flood stage. The South Platte River and its major tributaries began to flood by late Sunday evening and early Monday morning. Geologic and hydrologic processes activated by the May 5-6 storm caused extensive damage to lands and to manmade structures in the Greater Denver area. Damage was generally most intense in areas where man had modified the landscape--by channel constrictions, paving, stripping of vegetation and topsoil, and oversteepening of hillslopes. Roads, bridges, culverts, dams, canals, and the like were damaged or destroyed by erosion and sedimentation. Streambanks and structures along them were scoured. Thousands of acres of croplands, pasture, and developed urban lands were coated with mud and sand. Flooding was intensified by inadequate storm sewers, blocked drains, and obstructed drainage courses. Saturation of hillslopes along the Front Range caused rockfalls, landslides, and mudflows as far west as Berthoud Pass. Greater attention to geologic conditions in land-use planning, design, and construction would minimize storm damage in the future.

  19. 77 FR 13629 - Notice of Inventory Completion: History Colorado, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-07

    ... citizen. They are identified as Office of Archaeology and Historic Preservation (OAHP) Case Number 271. In March 2009, after the citizen passed away, the remains were turned over to the Department of Archaeology... State and Private Lands (2008) (unpublished, on file with the Colorado Office of Archaeology...

  20. 75 FR 5109 - Notice of Inventory Completion: Colorado Historical Society, Denver, CO; Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-01

    ... Notice of Inventory Completion published in the Federal Register (69 FR 68162-68169, November 23, 2004... black-on-white ceramic plate, is present. Cranial morphology is consistent with physical features common... the Colorado Historical Society later the same year. Cranial morphology is consistent with...

  1. Proceedings of the advanced seminar on sedimentation, August 15-19, 1983, Denver, Colorado

    USGS Publications Warehouse

    Glysson, G. D.

    1985-01-01

    On August 15-19, 1983, the U.S. Geological Survey 's Water Resources Division sponsored an advanced seminar on sedimentation at the National Training Center in Lakewood, Colorado. Topics discussed were modeling, mud, and debris flows, transport, sediment chemistry, channel morphology, instrumentation, and bed load. This circular presents summaries of 28 presentations. (USGS)

  2. Geologic sources and concentrations of selenium in the West-Central Denver Basin, including the Toll Gate Creek watershed, Aurora, Colorado, 2003-2007

    USGS Publications Warehouse

    Paschke, Suzanne S.; Walton-Day, Katie; Beck, Jennifer A.; Webbers, Ank; Dupree, Jean A.

    2014-01-01

    Toll Gate Creek, in the west-central part of the Denver Basin, is a perennial stream in which concentrations of dissolved selenium have consistently exceeded the Colorado aquatic-life standard of 4.6 micrograms per liter. Recent studies of selenium in Toll Gate Creek identified the Denver lignite zone of the non-marine Cretaceous to Tertiary-aged (Paleocene) Denver Formation underlying the watershed as the geologic source of dissolved selenium to shallow ground-water and surface water. Previous work led to this study by the U.S. Geological Survey, in cooperation with the City of Aurora Utilities Department, which investigated geologic sources of selenium and selenium concentrations in the watershed. This report documents the occurrence of selenium-bearing rocks and groundwater within the Cretaceous- to Tertiary-aged Denver Formation in the west-central part of the Denver Basin, including the Toll Gate Creek watershed. The report presents background information on geochemical processes controlling selenium concentrations in the aquatic environment and possible geologic sources of selenium; the hydrogeologic setting of the watershed; selenium results from groundwater-sampling programs; and chemical analyses of solids samples as evidence that weathering of the Denver Formation is a geologic source of selenium to groundwater and surface water in the west-central part of the Denver Basin, including Toll Gate Creek. Analyses of water samples collected from 61 water-table wells in 2003 and from 19 water-table wells in 2007 indicate dissolved selenium concentrations in groundwater in the west-central Denver Basin frequently exceeded the Colorado aquatic-life standard and in some locations exceeded the primary drinking-water standard of 50 micrograms per liter. The greatest selenium concentrations were associated with oxidized groundwater samples from wells completed in bedrock materials. Selenium analysis of geologic core samples indicates that total selenium

  3. Integrating viral hepatitis prevention services into an urban STD clinic: Denver, Colorado.

    PubMed

    Subiadur, Julie; Harris, Jennie L; Rietmeijer, Cornelis A

    2007-01-01

    The Centers for Disease Control and Prevention recommends integrating viral hepatitis prevention services with services for adults evaluated for sexually transmitted diseases (STDs). The Denver Public Health STD clinic began hepatitis B vaccination in 1999, hepatitis C virus (HCV) antibody (anti-HCV) testing in 2000, and hepatitis A vaccination in 2002. Rapid human immunodeficiency virus (HIV) testing began in late 2004. Hepatitis B vaccinations peaked in 2003 (31/100 client visits) when a full-time nurse was hired to vaccinate and eligibility was expanded. The proportion of clients documented to have received their anti-HCV test results declined from an average of 71% in 2000-2003 to 22% in 2004-2005, coinciding with the introduction of rapid HIV testing. Viral hepatitis prevention services can be incorporated into a busy STD clinic if staff and resources are available. Rapid HIV testing may be associated with lower receipt of anti-HCV test results. PMID:17542447

  4. Collective efficacy in Denver, Colorado: Strengthening neighborhoods and health through community gardens.

    PubMed

    Teig, Ellen; Amulya, Joy; Bardwell, Lisa; Buchenau, Michael; Marshall, Julie A; Litt, Jill S

    2009-12-01

    Community gardens are viewed as a potentially useful environmental change strategy to promote active and healthy lifestyles but the scientific evidence base for gardens is limited. As a step towards understanding whether gardens are a viable health promotion strategy for local communities, we set out to examine the social processes that might explain the connection between gardens, garden participation and health. We analyzed data from semi-structured interviews with community gardeners in Denver. The analysis examined social processes described by community gardeners and how those social processes were cultivated by or supportive of activities in community gardens. After presenting results describing these social processes and the activities supporting them, we discuss the potential for the place-based social processes found in community gardens to support collective efficacy, a powerful mechanism for enhancing the role of gardens in promoting health.

  5. Quality of groundwater in the Denver Basin aquifer system, Colorado, 2003-5

    USGS Publications Warehouse

    Musgrove, MaryLynn; Beck, Jennifer A.; Paschke, Suzanne; Bauch, Nancy J.; Mashburn, Shana L.

    2014-01-01

    The chemistry of groundwater samples collected from the water-table wells was generally different from that of samples collected from the bedrock-aquifer wells. Samples from the water-table wells tended to have higher concentrations of total dissolved solids and most major ions. Concentrations of several constituents with potential human-health concerns, including nitrate, selenium, uranium, and arsenic, decreased with depth and were highest in samples from the water-table wells. Exceedances of drinking-water standards and water-quality benchmarks were more frequently associated with shallow groundwater samples; concentrations of total dissolved solids and sulfate exceeded water-quality benchmarks for about half or more of samples from the water-table wells. The sediments and rocks of the Denver Basin are natural sources of the trace elements selenium, uranium, and arsenic, which affect their concentrations in groundwater. Detections of organic contaminants, which are typically indicative of human sources of contamination to groundwater, were more frequent in samples from the water-table wells. Pesticide compounds and volatile organic compounds were detected in 33 and 62 percent, respectively, of water-table well samples. Detected organic contaminant concentrations were much less than the associated drinking-water standards. Samples collected from the bedrock aquifers had lower concentrations of total dissolved solids than did samples collected from the water-table wells, although within the bedrock-aquifer samples, concentrations increased from the Dawson to Denver to Arapahoe to Laramie-Fox Hills aquifers. Concentrations of total dissolved solids and many constituents varied spatially and with depth in the bedrock aquifers, likely as a result of ion-exchange and oxidation-reduction reactions, which are important processes affecting water quality. Major-ion chemis

  6. Vulnerability of the uppermost ground water to contamination in the greater Denver area, Colorado

    USGS Publications Warehouse

    Hearne, G.A.; Wireman, Michael; Campbell, A.S.; Turner, Sandy; Ingersoll, G.P.

    1995-01-01

    Information about vulnerability of ground water to contamination is needed to facilitate ground-water management. Vulnerability of ground water refers to the intrinsic characteristics that determine the sensitivity of the water to being adversely affected by an imposed contaminant load. Within the greater Denver area, vulnerability of the uppermost ground water to contamination from the surface was assessed by considering the intrinsic characteristics included in a method developed by the U.S. Environmental Protection Agency and the National Water Well Association, the DRASTIC method. The seven geohydrologic characteristics considered are: (1) Aquifer media, (2) hydraulic conductivity, (3) unsaturated media, (4) depth to water, (5) recharge, (6) soil media, and (7) land-surface slope. Recharge from precipitation generally is less than 2 inches per year; no effort was made to quantify the variation of recharge throughout the study area. Data for geology, depth to water, soils, and elevation were obtained and processed to produce maps of the other six characteristics. Spatial and attribute data for these maps were stored and processed by geographic-information-system software to produce a map showing vulnerability of the uppermost ground water to contamination from the surface. This report describes the assessment of each geohydrologic characteristic and the 157 vulnerability response units that were delineated within the greater Denver area. These response units are unique with respect to the geohydrologic characteristics considered. The uppermost ground water within each of the vulnerability response units are described in a series of tables, which include qualitative and selected quantitative data and the vulnerability rating assigned for each of the seven geohydrologic characteristics.

  7. Science for watershed decisions on abandoned mine lands; review of preliminary results, Denver, Colorado, February 4-5, 1998

    USGS Publications Warehouse

    Nimick, David A.; Von Guerard, Paul

    1998-01-01

    From the Preface: There are thousands of abandoned or inactive mines on or adjacent to public lands administered by the U.S. Forest Service, Bureau of Land Management, and National Park Service. Mine wastes from many of these abandoned mines adversely affect resources on public lands. In 1995, an interdepartmental work group within the Federal government developed a strategy to address remediation of the many abandoned mines on public lands. This strategy is based on using a watershed approach to address the abandoned mine lands (AML) problem. The USGS, working closely with the Federal land-management agencies (FLMAs), is key for the success of this watershed approach. In support of this watershed approach, the USGS developed an AML Initiative with pilot studies in the Boulder River in Montana and the Animas River in Colorado. The goal of these studies is to design and implement a reliable strategy that will supply the scientific information to the FLMAs so that land managers can develop efficient and cost-effective remediation of AML. The symposium 'Science for Watershed Decisions on Abandoned Mine Lands: Review of Preliminary Results' held in Denver, Colorado, on February 4-5, 1998, provided the FLMAs a first look at the techniques, data, and interpretations being generated by the USGS pilot studies. This multidisciplined effort already is proving very valuable to land managers in making science-based AML cleanup decisions and will continue to be of increasing value as additional and more complete information is obtained. Ongoing interaction between scientists and land managers is essential to insure the efficient continuation and success of AML cleanup efforts.

  8. Quality of groundwater in the Denver Basin aquifer system, Colorado, 2003-5

    USGS Publications Warehouse

    Musgrove, MaryLynn; Beck, Jennifer A.; Paschke, Suzanne; Bauch, Nancy J.; Mashburn, Shana L.

    2014-01-01

    Water-quality data were synthesized to evaluate factors that affect spatial and depth variability in water quality and to assess aquifer vulnerability to contaminants from geologic materials and those of human origin. The quality of shallow groundwater in the alluvial aquifer and shallow bedrock aquifer system has been adversely affected by development of agricultural and urban areas. Land use has altered the pattern and composition of recharge. Increased recharge from irrigation water has mobilized dissolved constituents and increased concentrations in the shallow groundwater. Concentrations of most constituents associated with poor or degraded water quality in shallow groundwater decreased with depth; many of these constituents are not geochemically conservative and are affected by geochemical reactions such as oxidation-reduction reactions. Groundwater age tracers provide additional insight into aquifer vulnerability and help determine if young groundwater of potentially poor quality has migrated to deeper parts of the bedrock aquifers used for drinking-water supply. Age-tracer results were used to group samples into categories of young, mixed, and old groundwater. Groundwater ages transitioned from mostly young in the water-table wells to mostly mixed in the shallowest bedrock aquifer, the Dawson aquifer, to mostly old in the deeper bedrock aquifers. Although the bedrock aquifers are mostly old groundwater of good water quality, several lines of evidence indicate that young, contaminant-bearing recharge has reached shallow to moderate depths in some areas of the bedrock aquifers. The Dawson aquifer is the most vulnerable of the bedrock aquifers to contamination, but results indicate that the older (deeper) bedrock aquifers are also vulnerable to groundwater contamination and that mixing with young recharge has occurred in some areas. Heavy pumping has caused water-level declines in the bedrock aquifers in some parts of the Denver Basin, which has the potential

  9. Comparison of conceptually based and regression rainfall-runoff models, Denver Metropolitan area, Colorado, and potential applications in urban areas

    USGS Publications Warehouse

    Lindner-Lunsford, J. B.; Ellis, S.R.

    1987-01-01

    Multievent, conceptually based models and a single-event, multiple linear-regression model for estimating storm-runoff quantity and quality from urban areas were calibrated and verified for four small (57 to 167 acres) basins in the Denver metropolitan area, Colorado. The basins represented different land-use types - light commercial, single-family housing, and multi-family housing. Both types of models were calibrated using the same data set for each basin. A comparison was made between the storm-runoff volume, peak flow, and storm-runoff loads of seven water quality constituents simulated by each of the models by use of identical verification data sets. The models studied were the U.S. Geological Survey 's Distributed Routing Rainfall-Runoff Model-Version II (DR3M-II) (a runoff-quantity model designed for urban areas), and a multievent urban runoff quality model (DR3M-QUAL). Water quality constituents modeled were chemical oxygen demand, total suspended solids, total nitrogen, total phosphorus, total lead, total manganese, and total zinc. (USGS)

  10. Proceedings of a U.S. Geological Survey pressure-sensor Workshop, Denver, Colorado, July 28-31, 1992

    USGS Publications Warehouse

    Wilbourn, Sammy L.

    1994-01-01

    The U.S. Geological Survey (USGS) conducted a Pressure Sensor Workshop, oriented toward the measurement of stage in surface waters, in Denver, Colorado, July 28-31, 1992. Twenty attendees from the U.S. Geological Survey and the National Oceanic and Atmospheric Administration gave presentations concerning their experiences with the use of pressure sensors in hydrologic investigations. This report is a compilation of the abstracts of the presentations made at the workshop. Workshop participants concluded that each of the sensors evaluated by the U.S. Geological Survey has strengths and weaknesses. Personnel contemplating the use of pressure sensors discussed at this workshop should contact workshop attendees and consult with them about their experiences with those sensors. The attendees preferred to use stilling wells with float-operated water-level sensors as the primary means for monitoring water levels. However, pressure sensor systems were favored as replacements for mercury manometers and as alternatives to stilling wells at sites where stilling wells are not practical or cost effective.

  11. Quantity and quality of urban runoff from three localities in the Denver Metropolitan area, Colorado

    USGS Publications Warehouse

    Ellis, Sherman R.; Alley, William M.

    1979-01-01

    Considerable variation in constituent concentrations was shown in urban runoff data for 1975-77 from three metropolitan Denver drainage basins. Constituent concentrations, greatest during initial rainfall runoff, generally peaked midday of snowmelt runoff, corresponding with maximum melting and runoff. Instantaneous loads of constituents were largely a function of discharge. Days since last street sweeping or antecedent precipitation had no apparent effect; snowmelt-runoff loads apparently increased with number of days snow had been on the ground. Urban storm runoff may significantly contribute total ammonia nitrogen, total nonfiltrable residue, total copper, total iron, total lead, and total zinc; and snowmelt runoff may significantly contribute sodium and chloride, to local receiving waters. Data from two basins were used for calibration and verification of U.S. Environmental Protection Agency 's Storm Water Management Model II for rainfall-runoff modeling of flow and total nitrogen. The model assumption that land-surface loads of total nitrogen are directly proportional to number of days prior to storm during which accumulated rainfall was less than 1.0 inch was not substantiated. (Woodard-USGS)

  12. Street Level Hydrology: An Urban Application of the WRF-Hydro Framework in Denver, Colorado

    NASA Astrophysics Data System (ADS)

    Read, L.; Hogue, T. S.; Salas, F. R.; Gochis, D.

    2015-12-01

    Urban flood modeling at the watershed scale carries unique challenges in routing complexity, data resolution, social and political issues, and land surface - infrastructure interactions. The ability to accurately trace and predict the flow of water through the urban landscape enables better emergency response management, floodplain mapping, and data for future urban infrastructure planning and development. These services are of growing importance as urban population is expected to continue increasing by 1.84% per year for the next 25 years, increasing the vulnerability of urban regions to damages and loss of life from floods. Although a range of watershed-scale models have been applied in specific urban areas to examine these issues, there is a trend towards national scale hydrologic modeling enabled by supercomputing resources to understand larger system-wide hydrologic impacts and feedbacks. As such it is important to address how urban landscapes can be represented in large scale modeling processes. The current project investigates how coupling terrain and infrastructure routing can improve flow prediction and flooding events over the urban landscape. We utilize the WRF-Hydro modeling framework and a high-resolution terrain routing grid with the goal of compiling standard data needs necessary for fine scale urban modeling and dynamic flood forecasting in the urban setting. The city of Denver is selected as a case study, as it has experienced several large flooding events in the last five years and has an urban annual population growth rate of 1.5%, one of the highest in the U.S. Our work highlights the hydro-informatic challenges associated with linking channel networks and drainage infrastructure in an urban area using the WRF-Hydro modeling framework and high resolution urban models for short-term flood prediction.

  13. Proceedings of the 4th New World Luminescence Dating and Dosimetry Workshop, Denver, Colorado, May 31 June 2, 2006

    USGS Publications Warehouse

    Wise, Richard A.

    2006-01-01

    Introduction: Optically stimulated luminescence (OSL) is one of a class of measurements known as stimulated phenomena. Such phenomena may be stimulated thermally or optically and the reader is referred to works by Aitken (1998) and Botter-Jensen and others (2003) for more detail. In recent years OSL has become a popular procedure for the determination of environmental radiation doses absorbed by archeological and geological materials in an attempt to date these materials. The first OSL measurements on quartz and feldspar were made using an argon ion-laser (Huntley et al., 1985). However, the development of cheaper stimulation systems based first on filtered lamps and then on light- emitting diodes (LEDs) (Spooner, et al., 1990; Botter-Jensen, and others, 1999) has led to a massive expansion in OSL dating applications. The abstracts in this volume represent presentations from a workshop held in May-June 2006, at the Denver Federal Center, Denver, Colorado, in which OSL methodologies and applications were summarized and integrated to provide a current synthesis of the OSL science being applied throughout North America. The workshop, sponsored by the U.S. Geological Survey Crustal Imaging and Characterization Team and North Dakota State University, was open to all scientists interested in OSL dating techniques and radiation dosimetry. Participants included thirty-six research scientists and students in geology, archaeology, and physics from the U.S. Geological Survey, Los Alamos National Labs, Kentucky Geological Survey, eight universities in the United States, one university in Canada, one university in India, and Riso National Labs of Denmark. The workshop included two keynote speakers: Dr. Ashok Singhvi (Physical Research Laboratory, Ahmedabad, India) spoke on 'Some Unexplored Methodological Aspects and Some New Applications of Luminescence Dating,' while Dr. Jim Feathers (University of Seattle, WA) spoke on OSL Dating of Sediments From Paleoindian Sites in Brazil

  14. Geologic map of the greater Denver area, Front Range urban corridor, Colorado

    USGS Publications Warehouse

    Trimble, Donald E.; Machette, Michael N.

    1979-01-01

    This digital map shows the areal extent of surficial deposits and rock stratigraphic units (formations) as compiled by Trimble and Machette from 1973 to 1977 and published in 1979 under the Front Range Urban Corridor Geology Program. Trimble and Machette compiled their geologic map from published geologic maps and unpublished geologic mapping having varied map unit schemes. A convenient feature of the compiled map is its uniform classification of geologic units that mostly matches those of companion maps to the north (USGS I-855-G) and to the south (USGS I-857-F). Published as a color paper map, the Trimble and Machette map was intended for land-use planning in the Front Range Urban Corridor. This map recently (1997-1999) was digitized under the USGS Front Range Infrastructure Resources Project. In general, the mountainous areas in the western part of the map exhibit various igneous and metamorphic bedrock units of Precambrian age, major faults, and fault brecciation zones at the east margin (5-20 km wide) of the Front Range. The eastern and central parts of the map (Colorado Piedmont) depict a mantle of unconsolidated deposits of Quaternary age and interspersed outcroppings of Cretaceous or Tertiary-Cretaceous sedimentary bedrock. The Quaternary mantle comprises eolian deposits (quartz sand and silt), alluvium (gravel, sand, and silt of variable composition), colluvium, and a few landslides. At the mountain front, north-trending, dipping Paleozoic and Mesozoic sandstone, shale, and limestone bedrock formations form hogbacks and intervening valleys.

  15. 78 FR 45962 - Notice of Inventory Completion: University of Denver Museum of Anthropology, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-30

    ... sponsored by the Colorado Museum of Natural History, now the Denver Museum of Nature and Science. In 2012, 1... National Park Service Notice of Inventory Completion: University of Denver Museum of Anthropology, Denver, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The University of Denver......

  16. Uranium in Surface Waters and Sediments Affected by Historical Mining in the Denver West 1:100,000 Quadrangle, Colorado

    USGS Publications Warehouse

    Zielinski, Robert A.; Otton, James K.; Schumann, R. Randall; Wirt, Laurie

    2008-01-01

    Geochemical sampling of 82 stream waters and 87 stream sediments within mountainous areas immediately west of Denver, Colorado, was conducted by the U.S. Geological Survey in October 1994. The primary purpose was to evaluate regionally the effects of geology and past mining on the concentration and distribution of uranium. The study area contains uranium- and thorium-rich bedrock, numerous noneconomic occurrences of uranium minerals, and several uranium deposits of variable size and production history. During the sampling period, local streams had low discharge and were more susceptible to uranium-bearing acid drainage originating from historical mines of base- and precious-metal sulfides. Results indicated that the spatial distribution of Precambrian granites and metamorphic rocks strongly influences the concentration of uranium in stream sediments. Within-stream transport increases the dispersion of uranium- and thorium rich mineral grains derived primarily from granitic source rocks. Dissolved uranium occurs predominantly as uranyl carbonate complexes, and concentrations ranged from less than 1 to 65 micrograms per liter. Most values were less than 5 micrograms per liter, which is less than the current drinking water standard of 30 micrograms per liter and much less than locally applied aquatic-life toxicity standards of several hundred micrograms per liter. In local streams that are affected by uranium-bearing acid mine drainage, dissolved uranium is moderated by dilution and sorptive uptake by stream sediments. Sorbents include mineral alteration products and chemical precipitates of iron- and aluminum-oxyhydroxides, which form where acid drainage enters streams and is neutralized. Suspended uranium is relatively abundant in some stream segments affected by nearby acid drainage, which likely represents mobilization of these chemical precipitates. The 234U/238U activity ratio of acid drainage (0.95-1.0) is distinct from that of local surface waters (more than 1

  17. Third U.S. Geological Survey Wildland Fire-Science Workshop : Denver, Colorado, November 12-15, 2002

    USGS Publications Warehouse

    Livingston, Russell K.

    2004-01-01

    Executive Summary -- The historically significant wildland fire events that occurred in the United States during 2000 and 2002, together with the associated recognition of the need for a different national policy of forest management, has led to an increased awareness of the need for cooperative effort among all Federal agencies in planning for and managing the risks and consequences of wildland fire. The expertise and capabilities of the U.S. Geological Survey (USGS) are significant resources in this regard, and the agency is becoming increasingly involved in fire-science activities in support of the various land-management agencies that are dealing directly with this issue. The First USGS Wildland Fire Workshop was held in Sioux Falls, South Dakota, in 1997 and helped to establish the direction of USGS in sharing its expertise with the fire-management agencies. The Second USGS Wildland Fire Workshop was held in Los Alamos, New Mexico, in 2000 and brought together all the agencies involved in the management of wildland fires in order to determine their needs, to demonstrate USGS capabilities to meet those needs, and to establish methods for the USGS to distribute data and tools useful in fire management. It enhanced the relationships developed during the 1997 workshop and helped to define USGS' role in the fire-management community. The Third USGS Wildland Fire-Science Workshop, held in Denver, Colorado, November 12?15, 2002, was an opportunity for exchange of information on recent progress in the area of fire science and to determine the gaps in fire-science research that could be addressed by the USGS. In addition to more than 90 USGS scientists engaged in fire-related research and managers of organizational units involved in some aspect of wildland fire activities, the workshop was attended by about 30 representatives of 11 other Federal agencies. There also were a number of attendees affiliated with several universities, private companies, and State and local

  18. Impacts of the Denver Cyclone on regional air quality and aerosol formation in the Colorado Front Range during FRAPPÉ 2014

    NASA Astrophysics Data System (ADS)

    Vu, Kennedy T.; Dingle, Justin H.; Bahreini, Roya; Reddy, Patrick J.; Apel, Eric C.; Campos, Teresa L.; DiGangi, Joshua P.; Diskin, Glenn S.; Fried, Alan; Herndon, Scott C.; Hills, Alan J.; Hornbrook, Rebecca S.; Huey, Greg; Kaser, Lisa; Montzka, Denise D.; Nowak, John B.; Pusede, Sally E.; Richter, Dirk; Roscioli, Joseph R.; Sachse, Glen W.; Shertz, Stephen; Stell, Meghan; Tanner, David; Tyndall, Geoffrey S.; Walega, James; Weibring, Peter; Weinheimer, Andrew J.; Pfister, Gabriele; Flocke, Frank

    2016-09-01

    We present airborne measurements made during the 2014 Front Range Air Pollution and Photochemistry Experiment (FRAPPÉ) project to investigate the impacts of the Denver Cyclone on regional air quality in the greater Denver area. Data on trace gases, non-refractory submicron aerosol chemical constituents, and aerosol optical extinction (βext) at λ = 632 nm were evaluated in the presence and absence of the surface mesoscale circulation in three distinct study regions of the Front Range: In-Flow, Northern Front Range, and the Denver metropolitan area. Pronounced increases in mass concentrations of organics, nitrate, and sulfate in the Northern Front Range and the Denver metropolitan area were observed during the cyclone episodes (27-28 July) compared to the non-cyclonic days (26 July, 2-3 August). Organic aerosols dominated the mass concentrations on all evaluated days, with a 45 % increase in organics on cyclone days across all three regions, while the increase during the cyclone episode was up to ˜ 80 % over the Denver metropolitan area. In the most aged air masses (NOx / NOy < 0.5), background organic aerosols over the Denver metropolitan area increased by a factor of ˜ 2.5 due to transport from Northern Front Range. Furthermore, enhanced partitioning of nitric acid to the aerosol phase was observed during the cyclone episodes, mainly due to increased abundance of gas phase ammonia. During the non-cyclone events, βext displayed strong correlations (r = 0.71) with organic and nitrate in the Northern Front Range and only with organics (r = 0.70) in the Denver metropolitan area, while correlation of βext during the cyclone was strongest (r = 0.86) with nitrate over Denver. Mass extinction efficiency (MEE) values in the Denver metropolitan area were similar on cyclone and non-cyclone days despite the dominant influence of different aerosol species on βext. Our analysis showed that the meteorological patterns associated with the Denver Cyclone increased aerosol

  19. Ground-water quality near a sewage-sludge recycling site and a landfill near Denver, Colorado

    USGS Publications Warehouse

    Robson, Stanley G.

    1977-01-01

    The Metropolitan Denver Sewage Disposal District and the city and county of Denver operate a sewage-sludge recycling site and a landfill in an area about 15 miles (24 kilometers) east of Denver. The assessment of the effects of these facilities on the ground-water system indicated that five wells perforated in alluvium were found to have markedly degradedd water quality. One well is located in the landfill and water that was analyzed was obtained from near the base of the buried refuse, two others are located downgradient and near sewage-sludge burial areas, and the remaining two are located near stagnant surface ponds. Concentrations of nitrate in wells downgradient from fields where sludge is plowed into the soil were higher than background concentrations due to the effects of the sludge disposal. No evidence of water-quality degradation was detected in deeper wells perforated in the bedrock formations. (Woodard-USGS)

  20. The Role of Vocational Rehabilitation in the 1980's: Serving Those with Invisible Handicaps Such as Cancer, Cardiac Illness, Epilepsy. A Report of the Mary E. Switzer Memorial Seminar (3rd, Denver, Colorado, June 5-7, 1978).

    ERIC Educational Resources Information Center

    Perlman, Leonard G., Ed.

    This publication includes six action papers presented at the Denver, Colorado, seminar on June 5-7, 1978. Three disability categories highlighted in the seminar are the topics of the papers: cancer, cardiac illness, and epilepsy. There are two papers devoted to each category of disability, one focusing on action for eliminating barriers to…

  1. Vocational Rehabilitation and End Stage Renal Disease. Proceedings of the Workshop (Denver, Colorado, December 11-13, 1979).

    ERIC Educational Resources Information Center

    George Washington Univ. Medical Center, Washington, DC. Rehabilitation Research and Training Center.

    This document contains 12 papers presented to medical and vocational rehabilitation professionals on the topic of vocational rehabilitation and End Stage Renal Disease (ESRD) at a Denver conference in 1979. The following papers are contained in this report: "Rehabilitation and ESRD: Services with a New Thrust" by Kathleen E. Lloyd; "Medical…

  2. Analysis of urban storm-runoff data and the effects on the South Platte River, Denver metropolitan area, Colorado

    USGS Publications Warehouse

    Ellis, S.R.; Doerfer, J.T.; Mustard, M.H.; Blakely, S.R.; Gibbs, J.W.

    1984-01-01

    Denver was selected for inclusion in the Nationwide Urban Runoff Program, sponsored by the U.S. Environmental Protection Agency and the U.S. Geological Survey. This report, prepared in cooperation with the Denver Regional council of governments, contains a synopsis of previous urban runoff studies in the Denver metropolitan area. The report includes a description of the monitored basins, a summary of storm runoff-to-rainfall ratios and estimates of impervious retention, and constituent loads and concentrations from seven small basins. The data from six small and five tributary basins to the South Platte River are analyzed using regression analysis, resulting in two sets of regression equations to predict storm runoff volume and selected constituent loads. The regression equations may be used to estimate storm-runoff volume and constituent loads from unmonitored basins from 15 to 16,000 acres with effective impervious areas of 15 to 90 percent. The effects of urban runoff on the South Platte River in the Denver area are described in three ways. The three methods indicated that storm runoff was a significant contributor of total suspended solids, total organic carbon, total lead, and total zinc to the South Platte River. (USGS)

  3. 78 FR 52758 - Foreign-Trade Zone 123-Denver, Colorado; Application for Subzone, Pillow Kingdom, Inc., Aurora...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-26

    ... Kingdom, Inc., Aurora, Colorado An application has been submitted to the Foreign-Trade Zones (FTZ) Board... Pillow Kingdom, Inc. (Pillow Kingdom), located in Aurora, Colorado. The application was submitted... subzone would consist of the following site: Site 1 (34.66 acres) 24000 E. 19th Avenue, Aurora....

  4. A report from the World Conference on Lung Cancer (September 6-9, 2015 - Denver, Colorado, USA).

    PubMed

    Rabasseda, X

    2015-09-01

    The mile-high city of Denver was the site of this year's World Conference on Lung Cancer, which reached its 16th event. The conference scheduled 3 days of intensive scientific research presentations and discussions arranged in oral, mini-oral and poster sessions, plus an array of additional educational sessions. Being the largest international gathering of lung cancer and thoracic malignancy clinicians and researchers, important new research on prevention, screening and treatment of lung cancer and other malignancies of the thorax, with special emphasis on thymoma and mesothelioma, was presented during the conference.

  5. Median-porosity contour maps of the J Sandstone, Dakota Group, in the Denver Basin, Colorado, Nebraska, and Wyoming

    USGS Publications Warehouse

    Higley, D.K.; Gautier, D.L.

    1987-01-01

    Porosity data compiled in this study were determined from J sandstone cores from 134 widely spaced boreholes. Porosity in areas of poor core coverage was determined from neutron density logs from an additional 20 boreholes ( corrected to core average grain density). Median, rather than average, porosity was used in order to minimize the statistical effect of anomalously high and low porosity values. Thirty-five oil companies and independent operators supplied core porosity data. Core porosities were determined by means of helium porosimetry, primarily by Core Laboratories of Denver, Colo.

  6. Occurrence of Selected Organic Compounds in Groundwater Used for Public Supply in the Plio-Pleistocene Deposits in East-Central Nebraska and the Dawson and Denver Aquifers near Denver, Colorado, 2002-2004

    USGS Publications Warehouse

    Bails, Jeffrey B.; Dietsch, Benjamin J.; Landon, Matthew K.; Paschke, Suzanne S.

    2009-01-01

    The National Water-Quality Assessment Program of the U.S. Geological Survey has an ongoing Source Water-Quality Assessment program designed to characterize the quality of water in aquifers used as a source of drinking-water supply for some of the largest metropolitan areas in the Nation. In addition to the sampling of the source waters, sampling of finished or treated waters was done in the second year of local studies to evaluate if the organic compounds detected in the source waters also were present in the water supplied to the public. An evaluation of source-water quality used in selected groundwater-supplied public water systems in east-central Nebraska and in the south Denver metropolitan area of Colorado was completed during 2002 through 2004. Fifteen wells in the Plio-Pleistocene alluvial and glacial deposits in east-central Nebraska (the High Plains study) and 12 wells in the Dawson and Denver aquifers, south of Denver (the South Platte study), were sampled during the first year to obtain information on the occurrence and distribution of selected organic chemicals in the source waters. During the second year of the study, two wells in east-central Nebraska were resampled, along with the associated finished water derived from these wells, to determine if organic compounds detected in the source water also were present in the finished water. Selection of the second-phase sampling sites was based on detections of the most-frequently occurring organic compounds from the first-year Source Water-Quality Assessment study results. The second-year sampling also required that finished waters had undergone water-quality treatment processes before being distributed to the public. Sample results from the first year of sampling groundwater wells in east-central Nebraska show that the most-frequently detected organic compounds were the pesticide atrazine and its degradate, deethylatrazine (DEA, otherwise known as 2-chloro-4-isopropylamino-6-amino-s-triazine or CIAT

  7. 76 FR 14061 - Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-15

    ... of Nature & Science (then the Denver Museum of Natural History) (AC.9248A (CUI 70)). No known... materials excavated from the site to the Southeast Museum of the American Indian (a private museum founded... National Park Service Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO......

  8. Proceedings of the U.S. Geological Survey Seventh Biennial Geographic Information Science Workshop, Denver, Colorado, May 12-16, 2008

    USGS Publications Warehouse

    Helterbrand, Wm. Steve; Sieverling, Jennifer B.

    2008-01-01

    The U.S. Geological Survey (USGS) Seventh Biennial Geographic Information Science (GIS) Workshop (USGS-GIS 2008) on May 12 through 16, 2008, at the Denver Federal Center in Denver, Colorado, is unique in that it brings together GIS professionals from all of the USGS disciplines across all regions, and focuses primarily on the needs and accomplishments of the USGS. The theme for the 2008 workshop, ?GIS for Tomorrow?s Challenges,? provides an opportunity for USGS GIS professionals to demonstrate how they have responded to the challenges set forth in the USGS Science Strategy. During this workshop, attendees will have an opportunity to present or demonstrate their work; develop their knowledge by attending hands-on workshops and presentations given by professionals from the USGS and other Federal agencies, GIS-related companies, and academia; and to network with other professionals to develop collaborative opportunities. In addition to participation in numerous workshops and presentations, attendees will have opportunities to listen to top-level managers from the USGS present updates and goals concerning the future of several USGS programs. Monday evening?s Star Guest presentation by Thomas Wagner, NSF Office of Polar Programs, and Paul Morin, Antarctic Geospatial Information Center, entitled ?Mapping all that is White: Antarctic Science and Operations Viewed Though Geospatial Data,? will be one of many valuable presentations. This Proceedings volume will serve as an activity reference for workshop attendees, as well as an archive of technical abstracts presented at the workshop. Author, co-author, and presenter names, affiliations, and contact information are listed with presentation titles with the abstracts. Some hands-on sessions are offered twice; in these instances, abstracts submitted for publication are presented in the proceedings on both days on which they are offered. All acronyms used in these proceedings are explained in the text of each abstract.

  9. Proceedings of the U.S. Geological Survey Fourth Biennial Geographic Information Science Workshop: Denver, Colorado, April 23-27, 2001

    USGS Publications Warehouse

    Sieverling, Jennifer B.; Char, Stephen J.; San Juan, Carma A.

    2005-01-01

    Introduction: The U.S. Geological Survey (USGS) Fourth Biennial Geographic Information Science (GIS) Workshop (USGS-GIS 2001) was held April 23-27, 2001, at the Denver Federal Center in Denver, Colorado. The workshop provided an environment for participants to improve their knowledge about GIS and GIS-related applications that are used within the USGS. Two major topics of USGS-GIS 2001 were the application of GIS technology to interdisciplinary science and the distribution and sharing of USGS GIS products. Additionally, several presentations included GIS technology and tools, project applications of GIS, and GIS data management. USGS-GIS 2001 included user and vendor presentations, demonstrations, and hands-on technical workshops. Presentation abstracts that were submitted for publication are included in these proceedings. The keynote speaker was Karen Siderelis, the USGS Associate Director for Information (Geographic Information Officer). In addition to the USGS, other Federal agencies, GIS-related companies, and university researchers presented lectures or demonstrations or conducted hands-on sessions. USGS employees and contractors from every discipline and region attended the workshop. To facilitate the interaction between the Federal agencies, each of the presenting Federal agencies was invited to send a representative to the workshop. One of the most beneficial activities of USGS-GIS 2001, as identified by an informal poll of attendees, was the Monday evening poster session in which more than 75 poster presentations gave attendees a chance to learn of work being performed throughout the USGS. A feature new to USGS-GIS 2001 was internet participation of USGS personnel through cyber seminars of the morning plenary sessions.

  10. Petroleum system and production characteristics of the Muddy (J) Sandstone (Lower Cretaceous) Wattenberg continuous gas field, Denver basin, Colorado

    USGS Publications Warehouse

    Higley, D.K.; Cox, D.O.; Weimer, R.J.

    2003-01-01

    Wattenberg field is a continuous-type gas accumulation. Estimated ultimate recovery from current wells is 1.27 tcf of gas from the Lower Cretaceous Muddy (J) Sandstone. Mean gas resources that have the potential to be added to these reserves in the next 30 yr are 1.09 tcf; this will be primarily through infill drilling to recover a greater percentage of gas in place and to drain areas that are isolated because of geologic compartmentalization. Greatest gas production from the Muddy (J) Sandstone in Wattenberg field occurs (1) from within the most permeable and thickest intervals of Fort Collins Member delta-front and nearshore-marine sandstones, (2) to a lesser extent from the Horsetooth Member valley-fill channel sandstones, (3) in association with a large thermal anomaly that is delineated by measured temperatures in wells and by vitrinite reflectance contours of 0.9% and greater, (4) in proximity to the bounding Mowry, Graneros, and Skull Creek shales that are the hydrocarbon source rocks and reservoir seals, and (5) between the Lafayette and Longmont right-lateral wrench fault zones (WFZs) with secondary faults that act as conduits in areas of the field. The axis of greatest gas production is north 25 to 35?? northeast, which parallels the basin axis. Recurrent movement along five right-lateral WFZs that crosscut Wattenberg field shifted the Denver basin axis to the northeast and influenced depositional and erosional patterns of the reservoir and seal intervals. Levels of thermal maturity within the Wattenberg field are anomalously high compared to other areas of the Denver basin. The Wattenberg field thermal anomaly may be due to upward movement of fluids along faults associated with probable igneous intrusions. Areas of anomalous high heat flow within the field correlate with an increased and variable gas-oil ratio.

  11. Sexual Abuse: Therapeutic & Systems Considerations for the Child and Family. [Report of] Colorado State Department of Social Services Conference (Denver, Colorado, July 7-8, 1982).

    ERIC Educational Resources Information Center

    Carroll, Claudia A., Ed.; Gottlieb, Bruce, Ed.

    This publication presents papers from a 1982 child sexual abuse conference sponsored by the Colorado State Department of Social Services, designed to identify major issues and trends and to stimulate the exchange of perspectives and practices among persons concerned about preventing and treating child sexual abuse. The first section of the…

  12. Proceedings of the U.S. Geological Survey Eighth Biennial Geographic Information Science Workshop and first The National Map Users Conference, Denver, Colorado, May 10-13, 2011

    USGS Publications Warehouse

    Sieverling, Jennifer B.; Dietterle, Jeffrey

    2014-01-01

    The U.S. Geological Survey (USGS) is sponsoring the first The National Map Users Conference in conjunction with the eighth biennial Geographic Information Science (GIS) Workshop on May 10-13, 2011, in Lakewood, Colorado. The GIS Workshop will be held at the USGS National Training Center, located on the Denver Federal Center, Lakewood, Colorado, May 10-11. The National Map Users Conference will be held directly after the GIS Workshop at the Denver Marriott West, a convention hotel in the Lakewood, Colorado area, May 12-13. The National Map is designed to serve the Nation by providing geographic data and knowledge for government, industry, and public uses. The goal of The National Map Users Conference is to enhance communications and collaboration among the communities of users of and contributors to The National Map, including USGS, Department of the Interior, and other government GIS specialists and scientists, as well as the broader geospatial community. The USGS National Geospatial Program intends the conference to serve as a forum to engage users and more fully discover and meet their needs for the products and services of The National Map. The goal of the GIS Workshop is to promote advancement of GIS and related technologies and concepts as well as the sharing of GIS knowledge within the USGS GIS community. This collaborative opportunity for multi-disciplinary GIS and associated professionals will allow attendees to present and discuss a wide variety of geospatial-related topics. The Users Conference and Workshop collaboration will bring together scientists, managers, and data users who, through presentations, posters, seminars, workshops, and informal gatherings, will share accomplishments and progress on a variety of geospatial topics. During this joint event, attendees will have the opportunity to present or demonstrate their work; to develop their knowledge by attending hands-on workshops, seminars, and presentations given by professionals from USGS and

  13. Polygonal fault systems, a new structural style for the Niobrara and Lower Pierre Shale, Denver Basin, Colorado

    NASA Astrophysics Data System (ADS)

    Underwood, David

    2013-01-01

    Faulting in the Niobrara has proven a long standing issue with interpreters in the Rocky Mountain region, as evidenced by a variety of models for similar structural features. A new structural style called a Polygonal Fault System (PFS) is proposed in order to explain many of the observed fault characteristics including tier-constrained faults with random orientations hosted in a fine-grained lithology. Detailed 3D seismic interpretation from a 16mi2 survey within the Denver basin shows random to nearly random oriented faults in at least two discreet tiers, one in the Niobrara and a second in the Lower Pierre Formation. The fault surfaces link up in planview to form partially closed to incomplete polygons. Observed faults have throws less than 150ft, lengths under 6000ft, and dip at approximately 45 degrees. Isochrons used to constrain growth of the faults determine early genesis for the upper and lower tiers (approximately 70-80 Ma and 80-90 Ma respectively) which agrees with previous literature postulating early genesis. Further data acquisition is advised in order to further understand this system throughout the region and its effect on petroleum production. In addition, a future field study of Niobrara PFS observable in outcrop is recommended in Northwest Kansas.

  14. Geologic control of severe expansive clay damage to a subdivision in the Pierre Shale, southwest Denver metropolitan area, Colorado

    USGS Publications Warehouse

    Gill, J.D.; West, M.W.; Noe, D.C.; Olsen, H.W.; McCarty, D.K.

    1996-01-01

    Shortly after construction of a subdivision in the southwest Denver metropolitan area in 1986, a portion of the subdivision built directly on steeply-dipping strata of the Pierre Shale began experiencing damaging differential movements, causing house foundations to fail and pavements to warp and crack. This formation is a Late Cretaceous marine clay-shale composed predominantly of fluvial mixed-layer illite/smectite and quartz. During deposition of the shale, periodic and explosive volcanism generated thin beds of bentonite, consisting initially of volcanic ash and subsequently altered to nearly pure smectite. Some of these bentonite beds were exposed in a trench adjacent to the subdivision and perpendicular to the strike of the steeply-dipping strata. The thickest bentonite beds correlated well with linear heave features that these beds parallel the bedrock strike throughout the subdivision were mapped via severely deformed pavements. Mineralogical data show the bentonite bed that correlates with the worst damage within the subdivision consists of about 62% smectite by weight with mixed-layer illite/smectite expandability of 92%. By comparison, a sample of the typical silty claystone, which is fluvial mixed-layer illite/smectite mixed with detrital quartz from the adjacent strata, had about 23% smectite by weight with 70% to 90% illite/smectite expandability. Geotechnical tests for swell potential show that samples of 2 bentonite beds swelled 39% to 43% compared to 2% to 8% for samples of the typical silty claystone. It is proposed that differential swell resulting from stratigraphically-controlled differences in clay mineralogy and grain-size is the primary factor controlling extreme damage for this geologic setting.

  15. Colorado

    NASA Technical Reports Server (NTRS)

    2002-01-01

    An early-season snowfall accents the Rocky Mountains through western and central Colorado. This true-color image made from data collected by MODIS on October 26, 2001, highlights the contrast between various irrigated areas and the otherwise dry environment at the foothills of the Rockies. One such example is the city of Denver and its outlying suburbs, which can be seen best in the high-resolution image. In areas that would normally harbor drought-tolerant grasses, shrubs and trees, humans are living, watering their lawns, and farming; those watered, green areas differ substantially from the surrounding hues of brown. Numerous National Parks and Monuments dot the Southwestern U.S. The Great Sand Dunes National Monument is one such park. Running along the western base the Sangre de Cristo Range(just below the image's center), a subsection of the Rockies, the monument possesses some of the highest inland sand dunes in the U.S., with crests reaching over 700 feet.

  16. Railroad cars on the siding of the Denver, South Park ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Railroad cars on the siding of the Denver, South Park & Pacific/Colorado & Southern Railway Co., above and just south of the town of Saint Elmo (historical), Chaffee County, Colorado - Paramount Mine, Saint Elmo (historical), Chaffee County, CO

  17. MAKING WAVES, DENVER HEAD START.

    ERIC Educational Resources Information Center

    Denver Opportunity, CO.

    THIS DOCUMENT PROVIDES A DESCRIPTIVE SURVEY OF PROJECT HEAD START ACTIVITIES IN DENVER, COLORADO. THE PRIMARY EDUCATIONAL OBJECTIVES OF THE PROGRAM ARE CITED AS (1) CONCEPT DEVELOPMENT THROUGH EXPERIENCES IN AN ENLARGED ENVIRONMENT, (2) SELF-CONCEPT DEVELOPMENT THROUGH SUCCESSFUL INTERACTION WITH TEACHERS AND WITH PEERS, AND (3) THE DEVELOPMENT OF…

  18. Major- and Trace-Element Concentrations in Soils from Two Geochemical Surveys (1972 and 2005) of the Denver, Colorado, Metropolitan Area

    USGS Publications Warehouse

    Kilburn, James E.; Smith, David B.; Closs, L. Graham; Smith, Steven M.

    2007-01-01

    Introduction This report contains major- and trace-element concentration data for soil samples collected in 1972 and 2005 from the Denver, Colorado, metropolitan area. A total of 405 sites were sampled in the 1972 study from an area approximately bounded by the suburbs of Golden, Thornton, Aurora, and Littleton to the west, north, east, and south, respectively. This data set included 34 duplicate samples collected in the immediate vicinity of the primary sample. In 2005, a total of 464 sites together with 34 duplicates were sampled from the same approximate localities sampled in 1972 as well as additional sites in east Aurora and the area surrounding the Rocky Mountain Arsenal. Sample density for both surveys was on the order of 1 site per square mile. At each site, sample material was collected from a depth of 0-5 inches. Each sample collected was analyzed for near-total major- and trace-element composition by the following methods: (1) inductively coupled plasma-mass spectrometry (ICP-MS) and inductively coupled plasma-atomic emission spectrometry (ICP-AES) for aluminum, antimony, arsenic, barium, beryllium, bismuth, cadmium, calcium, cerium, cesium, chromium, cobalt, copper, gallium, indium, iron, lanthanum, lead, lithium, magnesium, manganese, molybdenum, nickel, niobium, phosphorus, potassium, rubidium, scandium, silver, sodium, strontium, sulfur, tellurium, thallium, thorium, tin, titanium, tungsten, uranium, vanadium, yttrium, and zinc; and (2) hydride generation-atomic absorption spectrometry for selenium. The samples collected in 2005 were also analyzed by a cold vapor-atomic absorption method for mercury. This report makes available the analytical results of these studies.

  19. Groundwater methane in relation to oil and gas development and shallow coal seams in the Denver-Julesburg Basin of Colorado.

    PubMed

    Sherwood, Owen A; Rogers, Jessica D; Lackey, Greg; Burke, Troy L; Osborn, Stephen G; Ryan, Joseph N

    2016-07-26

    Unconventional oil and gas development has generated intense public concerns about potential impacts to groundwater quality. Specific pathways of contamination have been identified; however, overall rates of contamination remain ambiguous. We used an archive of geochemical data collected from 1988 to 2014 to determine the sources and occurrence of groundwater methane in the Denver-Julesburg Basin of northeastern Colorado. This 60,000-km(2) region has a 60-y-long history of hydraulic fracturing, with horizontal drilling and high-volume hydraulic fracturing beginning in 2010. Of 924 sampled water wells in the basin, dissolved methane was detected in 593 wells at depths of 20-190 m. Based on carbon and hydrogen stable isotopes and gas molecular ratios, most of this methane was microbially generated, likely within shallow coal seams. A total of 42 water wells contained thermogenic stray gas originating from underlying oil and gas producing formations. Inadequate surface casing and leaks in production casing and wellhead seals in older, vertical oil and gas wells were identified as stray gas migration pathways. The rate of oil and gas wellbore failure was estimated as 0.06% of the 54,000 oil and gas wells in the basin (lower estimate) to 0.15% of the 20,700 wells in the area where stray gas contamination occurred (upper estimate) and has remained steady at about two cases per year since 2001. These results show that wellbore barrier failure, not high-volume hydraulic fracturing in horizontal wells, is the main cause of thermogenic stray gas migration in this oil- and gas-producing basin.

  20. Groundwater methane in relation to oil and gas development and shallow coal seams in the Denver-Julesburg Basin of Colorado

    PubMed Central

    Sherwood, Owen A.; Rogers, Jessica D.; Lackey, Greg; Burke, Troy L.; Osborn, Stephen G.; Ryan, Joseph N.

    2016-01-01

    Unconventional oil and gas development has generated intense public concerns about potential impacts to groundwater quality. Specific pathways of contamination have been identified; however, overall rates of contamination remain ambiguous. We used an archive of geochemical data collected from 1988 to 2014 to determine the sources and occurrence of groundwater methane in the Denver-Julesburg Basin of northeastern Colorado. This 60,000-km2 region has a 60-y-long history of hydraulic fracturing, with horizontal drilling and high-volume hydraulic fracturing beginning in 2010. Of 924 sampled water wells in the basin, dissolved methane was detected in 593 wells at depths of 20–190 m. Based on carbon and hydrogen stable isotopes and gas molecular ratios, most of this methane was microbially generated, likely within shallow coal seams. A total of 42 water wells contained thermogenic stray gas originating from underlying oil and gas producing formations. Inadequate surface casing and leaks in production casing and wellhead seals in older, vertical oil and gas wells were identified as stray gas migration pathways. The rate of oil and gas wellbore failure was estimated as 0.06% of the 54,000 oil and gas wells in the basin (lower estimate) to 0.15% of the 20,700 wells in the area where stray gas contamination occurred (upper estimate) and has remained steady at about two cases per year since 2001. These results show that wellbore barrier failure, not high-volume hydraulic fracturing in horizontal wells, is the main cause of thermogenic stray gas migration in this oil- and gas-producing basin. PMID:27402747

  1. A new look at methane and nonmethane hydrocarbon emissions from oil and natural gas operations in the Colorado Denver-Julesburg Basin

    NASA Astrophysics Data System (ADS)

    Pétron, Gabrielle; Karion, Anna; Sweeney, Colm; Miller, Benjamin R.; Montzka, Stephen A.; Frost, Gregory J.; Trainer, Michael; Tans, Pieter; Andrews, Arlyn; Kofler, Jonathan; Helmig, Detlev; Guenther, Douglas; Dlugokencky, Ed; Lang, Patricia; Newberger, Tim; Wolter, Sonja; Hall, Bradley; Novelli, Paul; Brewer, Alan; Conley, Stephen; Hardesty, Mike; Banta, Robert; White, Allen; Noone, David; Wolfe, Dan; Schnell, Russ

    2014-06-01

    Emissions of methane (CH4) from oil and natural gas (O&G) operations in the most densely drilled area of the Denver-Julesburg Basin in Weld County located in northeastern Colorado are estimated for 2 days in May 2012 using aircraft-based CH4 observations and planetary boundary layer height and ground-based wind profile measurements. Total top-down CH4 emission estimates are 25.8 ± 8.4 and 26.2 ± 10.7 t CH4/h for the 29 and 31 May flights, respectively. Using inventory data, we estimate the total emissions of CH4 from non-O&G gas-related sources at 7.1 ± 1.7 and 6.3 ± 1.0 t CH4/h for these 2 days. The difference in emissions is attributed to O&G sources in the study region, and their total emission is on average 19.3 ± 6.9 t/h, close to 3 times higher than an hourly emission estimate based on Environmental Protection Agency's Greenhouse Gas Reporting Program data for 2012. We derive top-down emissions estimates for propane, n-butane, i-pentane, n-pentane, and benzene from our total top-down CH4 emission estimate and the relative hydrocarbon abundances in aircraft-based discrete air samples. Emissions for these five nonmethane hydrocarbons alone total 25.4 ± 8.2 t/h. Assuming that these emissions are solely originating from O&G-related activities in the study region, our results show that the state inventory for total volatile organic compounds emitted by O&G activities is at least a factor of 2 too low for May 2012. Our top-down emission estimate of benzene emissions from O&G operations is 173 ± 64 kg/h, or 7 times larger than in the state inventory.

  2. Groundwater methane in relation to oil and gas development and shallow coal seams in the Denver-Julesburg Basin of Colorado.

    PubMed

    Sherwood, Owen A; Rogers, Jessica D; Lackey, Greg; Burke, Troy L; Osborn, Stephen G; Ryan, Joseph N

    2016-07-26

    Unconventional oil and gas development has generated intense public concerns about potential impacts to groundwater quality. Specific pathways of contamination have been identified; however, overall rates of contamination remain ambiguous. We used an archive of geochemical data collected from 1988 to 2014 to determine the sources and occurrence of groundwater methane in the Denver-Julesburg Basin of northeastern Colorado. This 60,000-km(2) region has a 60-y-long history of hydraulic fracturing, with horizontal drilling and high-volume hydraulic fracturing beginning in 2010. Of 924 sampled water wells in the basin, dissolved methane was detected in 593 wells at depths of 20-190 m. Based on carbon and hydrogen stable isotopes and gas molecular ratios, most of this methane was microbially generated, likely within shallow coal seams. A total of 42 water wells contained thermogenic stray gas originating from underlying oil and gas producing formations. Inadequate surface casing and leaks in production casing and wellhead seals in older, vertical oil and gas wells were identified as stray gas migration pathways. The rate of oil and gas wellbore failure was estimated as 0.06% of the 54,000 oil and gas wells in the basin (lower estimate) to 0.15% of the 20,700 wells in the area where stray gas contamination occurred (upper estimate) and has remained steady at about two cases per year since 2001. These results show that wellbore barrier failure, not high-volume hydraulic fracturing in horizontal wells, is the main cause of thermogenic stray gas migration in this oil- and gas-producing basin. PMID:27402747

  3. Occurrence and Origin of Methane in Relation to Major Ion Concentrations in Groundwater Wells of the Denver-Julesburg and Piceance Basins of Colorado

    NASA Astrophysics Data System (ADS)

    Rogers, J. D.; Sherwood, O.; Lackey, G.; Burke, T. L.; Osborn, S. G.; Ryan, J. N.

    2014-12-01

    The rapid expansion of unconventional oil and gas development in North America has generated intense public concerns about potential impacts to groundwater quality. To address these concerns, we examined geochemical data from a publicly available Colorado Oil and Gas Conservation Commission (COGCC) database. The data consist of over 17,000 samples from 4,756 unique surface and groundwater locations collected since 1990, representing one of the most extensive databases of groundwater quality in relation to oil and gas development anywhere. Following rigorous data QA/QC, we classified groundwater samples with respect to major ion composition and compared the assigned water "types" along with other geochemical parameters to methane concentrations and carbon isotopes in the Denver-Julesburg (DJ) and Piceance Basins in Colorado. 88% of samples with elevated methane (defined as > 1 mg L-1) were classified as Na-HCO3 type in the DJ basin and 78% were classified as either Na-HCO3 or Na-Cl type in the Piceance basin. Of the elevated methane samples, 96% and 69% in the DJ and Piceance basins respectively had microbial gas signatures, as determined by d13C values < - 60 ‰. Samples with elevated methane concentrations had higher pH, higher concentrations of chloride and sodium and lower concentrations of calcium in both the DJ and Piceance Basin. Elevated methane concentrations were predominately microbial in origin and correlated to indicators of increased water-rock interactions and anaerobic groundwater conditions, indicating that methane observed in these groundwater samples are largely a result of natural processes. Rare occurrences of stray thermogenic gas (d13C > 55 ‰, gas wetness > 5 % C2+ hydrocarbons) were most frequently associated with the Na-HCO3 water type in the DJ basin (67% of occurrences) and were randomly distributed across water types in the Piceance Basin. Investigation of natural and anthropogenic causes for the presence of methane is ongoing, using

  4. A spatial database of bedding attitudes to accompany Geologic map of the greater Denver area, Front Range Urban Corridor, Colorado

    USGS Publications Warehouse

    Trimble, Donald E.; Machette, Michael N.; Brandt, Theodore R.; Moore, David W.; Murray, Kyle E.

    2003-01-01

    This digital map shows bedding attitude symbols display over the geographic extent of surficial deposits and rock stratigraphic units (formations) as compiled by Trimble and Machette 1973-1977 and published in 1979 (U.S. Geological Survey Map I-856-H) under the Front Range Urban Corridor Geology Program. Trimble and Machette compiled their geologic map from published geologic maps and unpublished geologic mapping having varied map unit schemes. A convenient feature of the compiled map is its uniform classification of geologic units that mostly matches those of companion maps to the north (USGS I-855-G) and to the south (USGS I-857-F). Published as a color paper map, the Trimble and Machette map was intended for land-use planning in the Front Range Urban Corridor. This map recently (1997-1999), was digitized under the USGS Front Range Infrastructure Resources Project (see cross-reference). In general, the mountainous areas in the west part of the map exhibit various igneous and metamorphic bedrock units of Precambrian age, major faults, and fault brecciation zones at the east margin (5-20 km wide) of the Front Range. The eastern and central parts of the map (Colorado Piedmont) depict a mantle of unconsolidated deposits of Quaternary age and interspersed outcroppings of Cretaceous or Tertiary-Cretaceous sedimentary bedrock. The Quaternary mantle is comprised of eolian deposits (quartz sand and silt), alluvium (gravel, sand, and silt of variable composition), colluvium, and few landslides. At the mountain front, north-trending, dipping Paleozoic and Mesozoic sandstone, shale, and limestone bedrock formations form hogbacks and intervening valleys.

  5. Slope stability of proposed ski facilities at the southeast side of Snodgrass Mountain, Gunnison County, Colorado

    USGS Publications Warehouse

    Baum, Rex L.

    1996-01-01

    Part of the proposed expansion of ski facilities at Crested Butte Mountain Resort, Gunnison County, Colorado, is in an area underlain by landslide deposits that are on the southeast side of Snodgrass Mountain. Except for localized movement, the landslides do not appear to be moving at present or to have moved in the past several decades. Shallow sliding and debris flows have occurred in similar materials nearby and are likely to occur in the landslide deposits during the 50-100 year life of the proposed facilities. Hazards related to debris flow, shallow slumping, and expansive soils in the deposits can be reduced by appropriate engineering and remedial measures but maintenance for the proposed facility may become costly. Snow making is likely to aggravate the hazards of shallow slumping, deep-seated sliding, and debris flow. Reactivation and deep-seated movement of a 1.6-million-m3 slide at the east side of the deposits would damage or destroy a proposed gondola, ski lift N-3, and related facilities. Moving the gondola and lift off the slide and prohibiting snow making on the slide will protect the gondola and lift and reduce the chances of debris-flow damage to a proposed development near the toe of the slide. Insufficient data are available to assess the current or future stability of the landslides or to evaluate possible mitigation strategies; detailed stability analyses are needed before developing any facilities on the landslide deposits.

  6. Proceedings of the U.S. Geological Survey Eighth Biennial Geographic Information Science Workshop and first The National Map Users Conference, Denver, Colorado, May 10-13, 2011

    USGS Publications Warehouse

    Sieverling, Jennifer B.; Dietterle, Jeffrey

    2014-01-01

    The U.S. Geological Survey (USGS) is sponsoring the first The National Map Users Conference in conjunction with the eighth biennial Geographic Information Science (GIS) Workshop on May 10-13, 2011, in Lakewood, Colorado. The GIS Workshop will be held at the USGS National Training Center, located on the Denver Federal Center, Lakewood, Colorado, May 10-11. The National Map Users Conference will be held directly after the GIS Workshop at the Denver Marriott West, a convention hotel in the Lakewood, Colorado area, May 12-13. The National Map is designed to serve the Nation by providing geographic data and knowledge for government, industry, and public uses. The goal of The National Map Users Conference is to enhance communications and collaboration among the communities of users of and contributors to The National Map, including USGS, Department of the Interior, and other government GIS specialists and scientists, as well as the broader geospatial community. The USGS National Geospatial Program intends the conference to serve as a forum to engage users and more fully discover and meet their needs for the products and services of The National Map. The goal of the GIS Workshop is to promote advancement of GIS and related technologies and concepts as well as the sharing of GIS knowledge within the USGS GIS community. This collaborative opportunity for multi-disciplinary GIS and associated professionals will allow attendees to present and discuss a wide variety of geospatial-related topics. The Users Conference and Workshop collaboration will bring together scientists, managers, and data users who, through presentations, posters, seminars, workshops, and informal gatherings, will share accomplishments and progress on a variety of geospatial topics. During this joint event, attendees will have the opportunity to present or demonstrate their work; to develop their knowledge by attending hands-on workshops, seminars, and presentations given by professionals from USGS and

  7. Proceedings of the U.S. Geological Survey Sixth Biennial Geographic Information Science Workshop, Denver, Colorado, April 24-28, 2006

    USGS Publications Warehouse

    Brakebill, John W.; Sieverling, Jennifer B.; Chirico, Peter G.

    2006-01-01

    The U.S. Geological Survey's (USGS) Sixth Biennial Geographic Information Science Workshop April 24 - 28, 2006, at the Denver Federal Center in Denver, Colorado, provides a unique opportunity for multi-disciplinary Geographic Information Systems (GIS) and associated scientific professionals to share, learn, present, and discuss a wide variety of geospatial-related topics. Information is exchanged through a series of plenary sessions, hands-on technical workshops, user and commercial vendor demonstrations, lecture and poster sessions, and specialty meetings. Workshop attendance is limited to Department of Interior (DOI) and USGS employees and contractors; however, plenary, hands-on, and lecture sessions have presenters from other Federal agencies, numerous commercial vendors, universities, and several consortia. Over 175 participants are expected to attend the Workshop. Several prominent speakers are featured at this Workshop. Monday evening Star Guest Speaker and National Aeronautics and Space Administration (NASA) Astronaut Captain Dominic Gorie will talk about his experiences as a veteran of three space flights and over 32 days in space, including the NASA Space Shuttle Radar Topography Mission that mapped more than 47 million miles of the Earth's land surface. Selected as an astronaut candidate by NASA in December 1994, Captain Gorie is currently Chief of the Astronaut Shuttle Branch. Monday evening also features a town hall meeting with Geographic Information Office (GIO) leaders Karen Siderelis, Kevin Gallagher, Bob Pierce, Steve Guptill, Mark DeMulder, John Mahoney, and Mark Negri, who will discuss changes and activities within the GIO in an open discussion format. Tuesday plenary sessions feature keynote speaker Dr. P. Patrick Leahy, Acting USGS Director. Dr. Leahy holds undergraduate and graduate degrees in geology (1968) and geophysics (1970) from Boston College. In 1979, he received his doctorate in geology from Rensselaer Polytechnic Institute, where he

  8. A field test of tracer transport and organic contaminant elution in a stratified aquifer at the Rocky Mountain Arsenal (Denver, Colorado, U.S.A.)

    NASA Astrophysics Data System (ADS)

    Thorbjarnarson, Kathryn W.; Mackay, Douglas M.

    1997-01-01

    A tracer-elution experiment was conducted in a 9-m-thick alluvial sand aquifer at the Rocky Mountain Arsenal, Denver, Colorado, within an extensive 1,1,1-trichloroethene and trichloroethene plume. The forced-gradient flow field was controlled by an injection well and an extraction well separated by 8.4 m and aligned in the direction of the natural-gradient flow. Upon extraction, the contaminant-laden water was treated by air stripping and reinjected into the injection well. Iodide tracer was added to the injection flow during the initial 27.5 h of the experiment. Tracer transport and organic contaminant elution were monitored by four 0.15-m-screened drive points and a fully penetrating monitoring well. Relative permeabilities, dispersivities and retardation factors were estimated from tracer breakthrough and contaminant elution curves by the moment method and by curve-fitting with an advection-dispersion model. Tracer transport through the four strata sampled by the drive points indicated a permeability variation of three orders of magnitude. Contaminant elution was not observed in the lowest-permeability stratum monitored during the experiment. In all monitored strata, contaminant elution was controlled primarily by permeability effects on water flow and exhibited minimal retardation or desorption effects. The fully penetrating monitoring well exhibited a tracer response primarily from the more permeable strata with the addition of tracer from the less permeable strata producing an increased breakthrough spreading. This increased spreading or dispersion was reflected in a higher longitudinal dispersivity estimate (1.2 m assuming a homogeneous aquifer) than dispersivity estimates from the drive-point sampler tracer curves (ranging from 5 to 21 cm). Contaminant elution curves from the fully penetrating monitoring well exhibited an initial response primarily from the more permeable strata (rapid elution of contaminants) and provided no insight into the elution

  9. U.S. Geological Survey Middle Rio Grande Basin Study; proceedings of the first annual workshop, Denver, Colorado, November 12-14, 1996

    USGS Publications Warehouse

    Bartolino, J. R.

    1997-01-01

    many USGS scientists working in the Middle Rio Grande Basin, yearly technical meetings are planned for the anticipated 5-year study. These meetings provide an opportunity to present research results and plan new field efforts. This report documents the results of research presented at the first technical workshop held in Denver, Colorado, in November 1996. The report is organized into this introduction, five chapters that focus on USGS investigations in progress in the Middle Rio Grande Basin, and three appendixes with supplemental information. The first chapter provides an overview of the USGS program in the basin. The second chapter describes geographic data and analysis efforts in the basin. The third chapter details work being done on the hydrogeologic framework of the basin. The fourth chapter describes studies on ground-water availability in the basin and is divided into three areas of research: ground-water/surface-water interaction, ground-water flow and aquifer properties, and recharge. The fifth chapter is devoted to an overview of New Mexico District Cooperative Program studies in the basin. Finally, the appendixes list publications and presentations made during the first year of the study and 1996 workshop attendees. The report concludes with a list of selected references relevant to the study. The information in this report presents preliminary results of an evolving study. As the study progresses and individual projects publish their results in more detail, the USGS hopes to expand the scientific basis needed for management decisions regarding the Middle Rio Grande Basin.

  10. Testing Astronomical and 40Ar/39Ar Timescales for the K/Pg Boundary Interval Using High-Resolution Magnetostratigraphy and U-Pb Geochronology in the Denver Basin of Colorado

    NASA Astrophysics Data System (ADS)

    Clyde, W.; Bowring, S. A.; Johnson, K. R.; Ramezani, J.; Jones, M. M.

    2015-12-01

    Accurate and precise calibration of the Geomagnetic Polarity Timescale (GPTS) in absolute time is critical for resolving rates of geological and biological processes which in turn help constrain the underlying causes of those processes. Numerical calibration of the GPTS was traditionally carried out by interpolation between a limited number of 40Ar/39Ar dated volcanic ash deposits from superpositional sequences with well-defined magnetostratigraphies. More recently, the Neogene part of the GPTS has been calibrated using high-resolution astrochronological methods, however the application of these approaches to pre-Neogene parts of the timescale is controversial given the uncertainties in relevant orbital parameters this far back in time and differing interpretations of local cyclostratigraphic records. The Cretaceous-Paleogene (K/Pg) boundary interval is a good example, where various astronomical and 40Ar/39Ar calibrations have been proposed with varying degrees of agreement. The Denver Basin (Colorado, USA) contains one of the most complete stratigraphic sequences across the K/Pg boundary in the world, preserving evidence of bolide impact as well as biotic extinction and recovery in a thick stratigraphic package that is accessible by both core and outcrop. We present a series of high-precision U-Pb age determinations from interbedded volcanic ash deposits within a tightly constrained magnetobiostratigraphic framework across the K/Pg boundary in the Denver Basin. This new timeline provides a precise absolute age for the K/Pg boundary, constrains the ages of magnetic polarity Chrons C28 to C30, and provides a direct and independent test of early Paleogene astronomical and 40Ar/39Ar based timescales. Temporal calibration of fossil pollen evidence of the "fern spike" in the Denver Basin shows that plant extinctions peaked within ~50-500 years of the bolide impact and primary productivity recovered ~500-5000 years after the impact.

  11. Geologic framework for the national assessment of carbon dioxide storage resources: Denver Basin, Colorado, Wyoming, and Nebraska: Chapter G in Geologic framework for the national assessment of carbon dioxide storage resources

    USGS Publications Warehouse

    Drake II, Ronald M.; Brennan, Sean T.; Covault, Jacob A.; Blondes, Madalyn S.; Freeman, P.A.; Cahan, Steven M.; DeVera, Christina A.; Lohr, Celeste D.

    2014-01-01

    This is a report about the geologic characteristics of five storage assessment units (SAUs) within the Denver Basin of Colorado, Wyoming, and Nebraska. These SAUs are Cretaceous in age and include (1) the Plainview and Lytle Formations, (2) the Muddy Sandstone, (3) the Greenhorn Limestone, (4) the Niobrara Formation and Codell Sandstone, and (5) the Terry and Hygiene Sandstone Members. The described characteristics, as specified in the methodology, affect the potential carbon dioxide storage resource in the SAUs. The specific geologic and petrophysical properties of interest include depth to the top of the storage formation, average thickness, net-porous thickness, porosity, permeability, groundwater quality, and the area of structural reservoir traps. Descriptions of the SAU boundaries and the overlying sealing units are also included. Assessment results are not contained in this report; however, the geologic information included here will be used to calculate a statistical Monte Carlo-based distribution of potential storage volume in the SAUs.

  12. Denver: On the Horizon--Reducing Substance Abuse and Addiction.

    ERIC Educational Resources Information Center

    Drug Strategies, Washington, DC.

    This report is designed to inform the residents of Denver and the rest of Colorado about the dimensions of the problems caused by alcohol, tobacco, and other drugs in the states capital city. The report focuses on: the prevalence of substance abuse and addiction in Denver; the adverse impact of substance abuse on the health and well-being of…

  13. Colorado

    Atmospheric Science Data Center

    2014-05-15

    article title:  Spectacular Mountain Views of Northwest Colorado     ... portion of the image (across the top in this orientation) mountain ranges pictured here include the Medicine Bow, Front, Gore and the ...

  14. Demonstration optimization analyses of pumping from selected Arapahoe aquifer municipal wells in the west-central Denver Basin, Colorado, 2010–2109

    USGS Publications Warehouse

    Banta, Edward R.; Paschke, Suzanne S.

    2012-01-01

    Declining water levels caused by withdrawals of water from wells in the west-central part of the Denver Basin bedrock-aquifer system have raised concerns with respect to the ability of the aquifer system to sustain production. The Arapahoe aquifer in particular is heavily used in this area. Two optimization analyses were conducted to demonstrate approaches that could be used to evaluate possible future pumping scenarios intended to prolong the productivity of the aquifer and to delay excessive loss of saturated thickness. These analyses were designed as demonstrations only, and were not intended as a comprehensive optimization study. Optimization analyses were based on a groundwater-flow model of the Denver Basin developed as part of a recently published U.S. Geological Survey groundwater-availability study. For each analysis an optimization problem was set up to maximize total withdrawal rate, subject to withdrawal-rate and hydraulic-head constraints, for 119 selected municipal water-supply wells located in 96 model cells. The optimization analyses were based on 50- and 100-year simulations of groundwater withdrawals. The optimized total withdrawal rate for all selected wells for a 50-year simulation time was about 58.8 cubic feet per second. For an analysis in which the simulation time and head-constraint time were extended to 100 years, the optimized total withdrawal rate for all selected wells was about 53.0 cubic feet per second, demonstrating that a reduction in withdrawal rate of about 10 percent may extend the time before the hydraulic-head constraints are violated by 50 years, provided that pumping rates are optimally distributed. Analysis of simulation results showed that initially, the pumping produces water primarily by release of water from storage in the Arapahoe aquifer. However, because confining layers between the Denver and Arapahoe aquifers are thin, in less than 5 years, most of the water removed by managed-flows pumping likely would be supplied

  15. Cleaning up the Streets of Denver

    SciTech Connect

    Stegen, R.L.; Wood, T.R.; Hackett, J.R.; Sogue, A.

    2006-07-01

    Between 1913 and 1924, several Denver area facilities extracted radium from carnotite ore mined from the Paradox basin region of Colorado. Tailings or abandoned ores from these facilities were apparently incorporated into asphalt used to pave approximately 7.2 kilometers (4.5 miles) of streets in Denver. A majority of the streets are located in residential areas. The radionuclides are bound within the asphalt matrix and pose minimal risk unless they are disturbed. The City and County of Denver (CCoD) is responsible for controlling repairs and maintenance on these impacted streets. Since 2002, the CCoD has embarked on a significant capital improvement project to remove the impacted asphalt for secure disposal followed by street reconstruction. To date, Parsons has removed approximately 55 percent of the impacted asphalt. This paper discusses the history of the Denver Radium Streets and summarizes on-going project efforts. (authors)

  16. 208. Photocopy of photograph, Denver Post photographer, 2 August 1957 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    208. Photocopy of photograph, Denver Post photographer, 2 August 1957 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). NAPALM BOMB PRODUCTION LINE. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

  17. 205. Photocopy of photograph, Denver Post photographer, 19 September 1952 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    205. Photocopy of photograph, Denver Post photographer, 19 September 1952 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). THE 'GOOP' BOMB PRODUCTION LINE. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

  18. 202. Photocopy of photograph, Denver Post photographer, 2 August 1951 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    202. Photocopy of photograph, Denver Post photographer, 2 August 1951 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). NAPALM BOMB ASSEMBLY LINE. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

  19. 224. Photocopy of photograph, Denver Post photographer, 20 July 1971 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    224. Photocopy of photograph, Denver Post photographer, 20 July 1971 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). MUSTARD TON CONTAINERS BEING CHECKED FOR LEAKS PRIOR TO LOADING. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

  20. 207. Photocopy of photograph, Denver Post photographer, 22 March 1954 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    207. Photocopy of photograph, Denver Post photographer, 22 March 1954 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). MUSTARD GAS ASSEMBLY LINE, WHERE ARSENAL EMPLOYEES FILL 105mm ARTILLERY SHELL CASINGS WITH DEADLY GAS. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

  1. 203. Photocopy of photograph, Denver Post photographer, 19 September 1952 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    203. Photocopy of photograph, Denver Post photographer, 19 September 1952 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). PLACING BOMBS IN CLUSTERS OF 38. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

  2. 221. Photocopy of photograph, Denver Post photographer, 20 March 1970 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    221. Photocopy of photograph, Denver Post photographer, 20 March 1970 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). RABBIT USED TO TEST FOR NERVE GAS AT RMA. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

  3. 223. Photocopy of photograph, Denver Post photographer, 20 July 1971 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    223. Photocopy of photograph, Denver Post photographer, 20 July 1971 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). MUSTARD AGENT INCINERATOR. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

  4. OCCUPATIONS IN COLORADO. PART I, OUTLOOK BY INDUSTRIES.

    ERIC Educational Resources Information Center

    1966

    CURRENT AND PROJECTED EMPLOYMENT STATISTICS ARE GIVEN FOR THE STATE AND FOR THE DENVER STANDARD METROPOLITAN STATISTICAL AREA WHICH INCLUDES ADAMS, ARAPAHOE, BOULDER, DENVER, AND JEFFERSON COUNTIES. DATA WERE OBTAINED FROM THE COLORADO DEPARTMENT OF EMPLOYMENT, DENVER RESEARCH INSTITUTE, U.S. CENSUS, UNIVERSITY OF COLORADO, MOUNTAIN STATES…

  5. National Assessment of Oil and Gas Project: Petroleum Systems and Assessment of Undiscovered Oil and Gas in the Denver Basin Province, Colorado, Kansas, Nebraska, South Dakota, and Wyoming - USGS Province 39

    USGS Publications Warehouse

    Higley, Debra K.

    2007-01-01

    INTRODUCTION The purpose of the U.S. Geological Survey's (USGS) National Oil and Gas Assessment is to develop geologically based hypotheses regarding the potential for additions to oil and gas reserves in priority areas of the United States. The USGS recently completed an assessment of undiscovered oil and gas resources of the Denver Basin Province (USGS Province 39), Colorado, Kansas, Nebraska, South Dakota, and Wyoming. Petroleum is produced in the province from sandstone, shale, and limestone reservoirs that range from Pennsylvanian to Upper Cretaceous in age. This assessment is based on geologic principles and uses the total petroleum system concept. The geologic elements of a total petroleum system include hydrocarbon source rocks (source rock maturation, hydrocarbon generation and migration), reservoir rocks (sequence stratigraphy and petrophysical properties), and hydrocarbon traps (trap formation and timing). The USGS used this geologic framework to define seven total petroleum systems and twelve assessment units. Nine of these assessment units were quantitatively assessed for undiscovered oil and gas resources. Gas was not assessed for two coal bed methane assessment units due to lack of information and limited potential; oil resources were not assessed for the Fractured Pierre Shale Assessment Unit due to its mature development status.

  6. Calibration and verification of a rainfall-runoff model and a runoff-quality model for several urban basins in the Denver metropolitan area, Colorado

    USGS Publications Warehouse

    Lindner-Lunsford, J. B.; Ellis, S.R.

    1984-01-01

    The U.S. Geological Survey 's Distributed Routing Rainfall-Runoff Model--Version II was calibrated and verified for five urban basins in the Denver metropolitan area. Land-use types in the basins were light commerical, multifamily housing, single-family housing, and a shopping center. The overall accuracy of model predictions of peak flows and runoff volumes was about 15 percent for storms with rainfall intensities of less than 1 inch per hour and runoff volume of greater than 0.01 inch. Predictions generally were unsatisfactory for storm having a rainfall intensity of more than 1 inch per hour, or runoff of 0.01 inch or less. The Distributed Routing Rainfall-Runoff Model-Quality, a multievent runoff-quality model developed by the U.S. Geological Survey, was calibrated and verified on four basins. The model was found to be most useful in the prediction of seasonal loads of constituents in the runoff resulting from rainfall. The model was not very accurate in the prediction of runoff loads of individual constituents. (USGS)

  7. Confirmation and Characterization of a Previously Unmapped Northeast Extension of the Cheraw Fault, Southeast Colorado

    NASA Astrophysics Data System (ADS)

    Zellman, M.; Ostenaa, D.

    2015-12-01

    Recent geologic field mapping, shallow geophysical surveys, and boreholes, combined with interpretation of reprocessed industry 2D seismic reflection profiles, provide new constraints for the structural characterization of the Cheraw Fault in southeastern Colorado. A previously unmapped topographic scarp extending northeast from of the mapped fault trace exhibits northeast-oriented fractures in Cretaceous Niobrara shale and an apparent ~3m down-to-the-northwest offset across a bedrock/alluvium contact observed in exposures of the scarp near of Haswell, CO. Shallow seismic surveys and a transect of 4 shallow borings across the scarp confirm the vertical displacement estimates. Two industry 2D seismic refraction profiles that cross this scarp were licensed, reprocessed, and depth-migrated. Preliminary analyses of the seismic profiles show ~ 100m or less of down-to-the-northwest displacement across a primary fault that is coincident with the topographic scarp and extends through Mesozoic and Paleozoic strata into Precambrian basement. Fault dip constraints and are pending further seismic data interpretation and analysis. These data show that 1) the Cheraw fault extends an additional 15 km from its currently mapped northern termination, for a minimum total fault length of ~60 km, 2) offset of an early (?) Quaternary pediment along the northeast extension near the town of Haswell of ~3 m, is similar in magnitude to the offset in a late Pleistocene channel reported by Crone et al. (1997) along the main trace of the fault, and 3) seismic reflection data show that the fault extends into crystalline basement rock, supporting a tectonic feature rather than dissolution collapse.

  8. Runoff characteristics and washoff loads from rainfall-simulation experiments on a street surface and a native pasture in the Denver metropolitan area, Colorado

    USGS Publications Warehouse

    Mustard, Martha H.; Ellis, Sherman R.; Gibbs, Johnnie W.

    1987-01-01

    Rainfall simulation studies were conducted in conjunction with the Denver Regional Urban Runoff Program to: (1) Compare runoff quantity and quality from two different intensities of rainfall on impervious plots having identical antecedent conditions, (2) document a first flush of constituent loads in runoff from l,000-square-foot street-surface plots, (3) compare runoff characteristics from a street surface subjected to simulated rainfall with those from a 69-acre urban basin of mixed land use subjected to natural rainfall, (4) perform statistical analysis of constituent loads in the runoff with several independent variables, and (5) compare the quantity and quality of runoff from 400-square-foot plots of native grasses used for pasture and subjected to simulated rainfall with that from a 405-acre basin covered with native grasses used for pasture and subjected to natural rainfall. The rainfall simulations conducted on the street surface showed that higher intensity simulated rainfall produced a higher percentage of runoff than lower intensity rainfall. A first flush of constituent loads occurred for most constituents in the runoff from most rainfall simulations on the street surface; however, a first flush did not occur in the runoff from simulated rainfall on the pasture. The event mean concentrations of constituents in the runoff from simulated storms on the street surface were generally much smaller than the event mean concentrations of constituents in the runoff from an adjacent urban basin. Analysis of the data from the rainfall simulations on a street surface indicates that intensity of rainfall and total rainfall are important variables determining constituent loads. The design of the experiment was such that intensity of rainfall and total rainfall were highly correlated, thus precluding the development of useful regression equations to predict washoff loads. The quality of runoff from the simulated rainfall on the pasture was influenced by the disturbed

  9. Historic Denver for Kids.

    ERIC Educational Resources Information Center

    Smith, Barbara A.

    Although the directory to Denver's historic sites has been compiled particularly for the use of teachers and their classes, it will be useful to all individuals and groups of any age who are interested in exploring the history of the Denver area. Seventy historic sites are listed alphabetically. Information for each provides address, phone, price…

  10. 40 CFR 81.16 - Metropolitan Denver Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... (CONTINUED) AIR PROGRAMS (CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.16 Metropolitan Denver Intrastate Air Quality Control Region. The Metropolitan Denver Intrastate Air Quality Control Region (Colorado) consists of the territorial...

  11. 40 CFR 81.16 - Metropolitan Denver Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... (CONTINUED) AIR PROGRAMS (CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.16 Metropolitan Denver Intrastate Air Quality Control Region. The Metropolitan Denver Intrastate Air Quality Control Region (Colorado) consists of the territorial...

  12. 40 CFR 81.16 - Metropolitan Denver Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... (CONTINUED) AIR PROGRAMS (CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.16 Metropolitan Denver Intrastate Air Quality Control Region. The Metropolitan Denver Intrastate Air Quality Control Region (Colorado) consists of the territorial...

  13. 40 CFR 81.16 - Metropolitan Denver Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... (CONTINUED) AIR PROGRAMS (CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.16 Metropolitan Denver Intrastate Air Quality Control Region. The Metropolitan Denver Intrastate Air Quality Control Region (Colorado) consists of the territorial...

  14. 40 CFR 81.16 - Metropolitan Denver Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... (CONTINUED) AIR PROGRAMS (CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.16 Metropolitan Denver Intrastate Air Quality Control Region. The Metropolitan Denver Intrastate Air Quality Control Region (Colorado) consists of the territorial...

  15. 206. Photocopy of photograph, Denver Post photographer, 20 March 1954 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    206. Photocopy of photograph, Denver Post photographer, 20 March 1954 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). WORKERS USE AIRTIGHT SUITS, GLOVES AND MASKS TO WORK WITH DEADLY GB NERVE GAS. WORKERS ARE NOT PERMITTED TO STAY IN THE BLENDING CHAMBER FOR MORE THAN 20 MINUTES AT A TIME, EVEN WITH THESE PRECAUTIONS. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

  16. 204. Photocopy of photograph, Denver Post photographer, 19 September 1952 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    204. Photocopy of photograph, Denver Post photographer, 19 September 1952 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). THE LAST STEP IN BOMB PRODUCTION-PACKING BOMB CLUSTERS. THE FINISHED PRODUCT WEIGHS 500 POUNDS AND WHEN DETONATED, THROWS BURNING JELLIED GASOLINE OVER A WIDE AREA. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

  17. Interim report on the scientific investigations in the Animas River watershed, Colorado to facilitate remediation decisions by the U.S. Bureau of Land Management and the U.S. Forest Service, March 29, 2000 meeting, Denver, Colorado

    USGS Publications Warehouse

    ,

    2000-01-01

    INTRODUCTION The joint U.S. Department of the Interior and U.S. Department of Agriculture Abandoned Mine Lands Initiative (AMLI) was developed as a collaborative effort between the Federal land management agencies (FLMA, that is the U.S. Bureau of Land Management and the U.S. Forest Service) and the U.S. Geological Survey (USGS) in 1996. The stated goal of the AML Initiative was to develop a strategy for gathering and communicating the scientific information needed to develop effective and cost-efficient remediation of abandoned mines within the framework of a watershed. Four primary objectives of the AMLI are to: 1. Provide the scientific information needed (in the short-term) by the FLMAs to make decisions related to the design and implementation of cleanup actions, 2. Develop a multi-disciplined, multi-division approach that integrates geologic, hydrologic, geochemical and ecological information into a knowledge base for sound decision making, 3. Transfer technologies developed within the scientific programs of the USGS to the field and demonstrate their suitability to solve real, practical problems, and 4. Establish working relationships among involved members of land management and regulatory agencies within the framework of a watershed approach to the cleanup of abandoned mines. Long-term process-based research, including development of analytical tools, is recognized as being critical to the long-term success in remediating watersheds impacted by historical mining activities (AML 5-year plan, http://amli.usgs.gov/amli). In a meeting of Federal agencies (U.S. Bureau of Land Management [BLM], U.S. Bureau of Reclamation [BOR], U.S. National Park Service [NPS], U.S. Forest Service [USFS], the U.S. Environmental Protection Agency [EPA], the U.S. Fish and Wildlife Service [F&WS]), and State agencies (Colorado Division of Public Health and Environment, Colorado Division of Mines and Geology), several watersheds were examined within the state whose water quality was

  18. Social Interaction Patterns and Relative Urban Success: the Denver Navajo

    ERIC Educational Resources Information Center

    Snyder, Peter Z.

    1973-01-01

    This examination of the social factors of urban adaptation of Navajo Indian migrants to Denver, Colorado--based on reference-membership group theory--attempts to isolate primary groups within the Navajo urban enclave'' to investigate the relationship of group membership to adaptation. (JM)

  19. The Denver principles.

    PubMed

    2000-01-01

    The Denver principles articulate the self empowerment movement of People With AIDS (PWA). The statements, written in 1983 by the Advisory Committee of the People With AIDS, include recommendations on how to support those with disease. It also includes suggestions for people who have AIDS. It concludes by listing the "rights of people with AIDS."

  20. A Cooperative Film Effort in Colorado

    ERIC Educational Resources Information Center

    Spetnagel, H. T.; And Others

    1972-01-01

    The mass communications department of the University of Denver assisted in producing a film on community colleges in Colorado which improved the film students' cinema skills while providing greater exposure for the community college system. (NF)

  1. Map showing availability of hydrologic data published by the U.S. Environmental Data Service and by the U.S. Geological Survey and cooperative agencies, greater Denver area, Front Range Urban Corridor, Colorado

    USGS Publications Warehouse

    Hampton, E.R.

    1975-01-01

    What is the rainfall of this region? What areas are prone to periodic flooding? What is the water supply? What is the chemical quality of the ground water and water in the streams? How deep is the water table? Which streams are gaged, and where? These and similar questions are being asked regularly by land and resource developers, urban planners, industrial consultants, and governmental resource managers. This map provides the first step toward answering these questions. It shows by symbols and color the hydrologic data published as of January 1974 for the Greater Denver area by the U.S. Environmental Data Service and by the U.S. Geological Survey and cooperating agencies, and the points or areas where these data have been collected. The sources of the data are given in both the following discussion and the references.

  2. 76 FR 9606 - Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-18

    ... human remains in the possession of the Denver Museum of Nature & Science, Denver, CO. The human remains... National Park Service Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Denver Museum of Nature & Science...

  3. 76 FR 9603 - Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-18

    ... human remains in the possession of the Denver Museum of Nature & Science, Denver, CO. The human remains... National Park Service Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Denver Museum of Nature & Science...

  4. 76 FR 9598 - Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-18

    ... human remains in the possession of the Denver Museum of Nature & Science, Denver, CO. The human remains... National Park Service Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Denver Museum of Nature & Science...

  5. 76 FR 9604 - Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-18

    ... human remains in the possession of the Denver Museum of Nature & Science, Denver, CO. The human remains... National Park Service Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Denver Museum of Nature & Science...

  6. 75 FR 5627 - Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-03

    ... National Park Service Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO AGENCY... of human remains in the possession of the Denver Museum of Nature & Science, Denver, CO. The human... this notice. A detailed assessment of the human remains was made by the Denver Museum of...

  7. 75 FR 23807 - Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-04

    ... National Park Service Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO AGENCY... of human remains in the possession of the Denver Museum of Nature & Science, Denver, CO. The human... this notice. A detailed assessment of the human remains was made by the Denver Museum of...

  8. Turnaround for the Denver Clinic.

    PubMed

    Norris, M J

    1981-01-01

    By renovating its facility, the Denver Clinic was able to meet the needs of its present patient population and attract new patients. Marketing techniques were employed to redesign the facility and to capitalize on the clinic's competitive edge in the Denver market. Useful information is offered to other clinics who are considering facility renovation and on the advantages group practices have in the medical market plan. PMID:10252836

  9. Denver TMA assessment

    NASA Technical Reports Server (NTRS)

    Harwood, Kelly; Sanford, Beverly

    1993-01-01

    This report describes the assessment of the Traffic Management Advisor (TMA) conducted at the Denver Center and TRACON, January 11-February 5, 1993. The assessment addressed the effectiveness of TMA for supporting various traffic management activities. At the Center, traffic management coordinators (TMC's) shadowed traffic operations, using TMA to make metering time and internal release decisions. At the TRACON, TMC's accessed TMA in an advisory mode for different planning activities such as staffing, distributing the traffic load, and changing the airport acceptance rate. These different opportunities for assessing TMA provide insight into TMA as a potential communication aid and planning tool. Findings from this assessment indicate that TMA can be used to support traffic management planning and decisions. TMC's at the center were able to use information provided by TMA to determine metering times as well as internal release times. At the TRACON, TMA supported decisions on airport configuration, airport acceptance rate, load distribution, proactive coordination with the center, and staffing. While findings of TMA use are generally positive, it must be kept in mind that this assessment is a snapshot in time. Not all TMA capabilities were assessed, nor were TMC's fully trained and knowledgeable on all features. Feature use will continue to evolve and strategies emerge as the TMC's gain experience with TMA over a variety of traffic situations and their understanding of TMA capabilities broadens with continued training.

  10. 77 FR 15798 - Notice of Intent To Repatriate Cultural Items: The Colorado College, Colorado Springs, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-16

    ... ladles. The vessel styles are black-on-gray, black-on-white, Tusayan black-on-red, corrugated and gray... collections from The Colorado College Museum, through long-term loans to the Fine Arts Center (formerly known as the Taylor Museum and the Colorado Springs Fine Arts Center) and the Denver Museum of...

  11. Denver School of Science and Technology: A High School that Works

    ERIC Educational Resources Information Center

    Colorado Children's Campaign, 2006

    2006-01-01

    When one sees the new Denver School of Science and Technology (DSST), the first thing one will likely to notice is the building's impressive design. The school looks more like a Silicon Valley biotech firm than a typical new Colorado high school. Indeed, the innovative structure, modeled on a similar facility in San Diego, has already garnered…

  12. Preventing Childhood Bullying: Findings and Lessons from the Denver Public Schools Trial

    ERIC Educational Resources Information Center

    Jenson, Jeffrey M.; Dieterich, William A.; Brisson, Daniel; Bender, Kimberly A.; Powell, Anne

    2010-01-01

    Twelve-month follow-up outcomes from a group-randomized trial (GRT) of a classroom curriculum aimed at preventing bullying and victimization among elementary students in the Denver, Colorado, public school system are presented. Twenty-eight elementary schools were randomly assigned to receive selected modules of "Youth Matters" (YM), a…

  13. A Downtown Denver Law Firm Leverages Tenant Improvement Funds to Cut Operating Expenses

    SciTech Connect

    2013-03-01

    Bryan Cave HRO (formerly Holme Roberts & Owen LLP, headquartered in Denver, Colorado), an international law firm, partnered with the U.S Department of Energy (DOE) to develop and implement solutions to retrofit existing buildings to reduce annual energy consumption by at least 30% versus pre-retrofit energy use as part of DOE’s Commercial Building Partnership (CBP) program.

  14. 76 FR 34711 - Notice of Hearing; Reconsideration of Disapproval of Colorado State Plan Amendments (SPA) 10-034

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-14

    ... Disapproval of Colorado State Plan Amendments (SPA) 10-034 AGENCY: Centers for Medicare & Medicaid Services..., Suite 700, Denver, Colorado 80202-4367 to reconsider CMS' decision to disapprove Colorado SPA 10-034...: This notice announces an administrative hearing to reconsider CMS' decision to disapprove Colorado...

  15. Aerial overview of the Denver International Airport site, looking southwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Aerial overview of the Denver International Airport site, looking southwest - Denver International Airport Site, Between Fifty-sixth & 128th Avenues, Buckley Road & Box Elder Creek, Denver, Denver County, CO

  16. 76 FR 43709 - Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-21

    ... 1983, the Cranes donated the human remains to the Denver Museum of Natural History, as the museum was... National Park Service Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Denver Museum of Nature & Science...

  17. Denver Makes a Fairer Choice

    ERIC Educational Resources Information Center

    Teske, Paul; Yettick, Holly; Ely, Todd; Klute, Mary

    2015-01-01

    Denver Public Schools traditional and charter schools combined to create a single system that allowed all students to indicate their school choice preferences, replacing a system of more than 60 different selection processes. The new system also gave families a wealth of information regarding school quality. A study of the new system found it was…

  18. Extensive Green Roof Research Program at Colorado State University

    EPA Science Inventory

    In the high elevation, semi-arid climate of Colorado, green roofs have not been scientifically tested. This research examined alternative plant species, media blends, and plant interactions on an existing modular extensive green roof in Denver, Colorado. Six plant species were ev...

  19. 2. Lake Havasu on left, Colorado River on right below ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Lake Havasu on left, Colorado River on right below Parker Dam; View southeast from TV Hill above Whitsett Pump Plant. - Parker Dam, Spanning Colorado River between AZ & CA, Parker, La Paz County, AZ

  20. Geochronology Database for Central Colorado

    USGS Publications Warehouse

    Klein, T.L.; Evans, K.V.; deWitt, E.H.

    2010-01-01

    This database is a compilation of published and some unpublished isotopic and fission track age determinations in central Colorado. The compiled area extends from the southern Wyoming border to the northern New Mexico border and from approximately the longitude of Denver on the east to Gunnison on the west. Data for the tephrochronology of Pleistocene volcanic ash, carbon-14, Pb-alpha, common-lead, and U-Pb determinations on uranium ore minerals have been excluded.

  1. 76 FR 27164 - Extension of Accreditation Agreement With Colorado Department of Human Services Under the...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-10

    ... Federal Register 971 FR 8064-8066, February 15, 2006) and became effective on March 17, 2006. The final... (Colorado), with its principal office located at 1575 Sherman Street, Denver, CO 80203-1714, hereinafter...

  2. The Denver-Boulder Hmong: A Geographical Perspective on the Acculturation and Satisfaction of an Indochinese Refugee Community.

    ERIC Educational Resources Information Center

    Monzel, Kristen L.

    This study examines the Lao Hmong, an Indochinese refugee group that has resettled in the Denver-Boulder, Colorado, area. Characteristics examined are the following: (1) migration; (2) location; (3) housing; (4) acculturation; and (5) life satisfaction. An extensive literature review discusses the history, ethnography, and culture of the Hmong in…

  3. 78 FR 45961 - Notice of Inventory Completion: University of Denver Museum of Anthropology, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-30

    ... National Park Service Notice of Inventory Completion: University of Denver Museum of Anthropology, Denver... of Anthropology has completed an inventory of human remains, in consultation with the appropriate... Denver Museum of Anthropology. If no additional requestors come forward, transfer of control of the...

  4. 75 FR 55823 - Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO; Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-14

    ... Register (75 FR 42770-42771, July 22, 2010) with the addition of 13 associated funerary objects. Since the... National Park Service Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO... Museum of Nature & Science, Denver, CO. The human remains and associated funerary objects were...

  5. 76 FR 58032 - Notice of Intent To Repatriate a Cultural Item: Denver Museum of Nature and Science, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-19

    ... by the Cranes to the Denver Museum of Natural History (now Denver Museum of Nature & Science). The... National Park Service Notice of Intent To Repatriate a Cultural Item: Denver Museum of Nature and Science, Denver, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Denver Museum of...

  6. Denver

    ERIC Educational Resources Information Center

    Branscombe, Art

    1977-01-01

    Notes that Denverites are proud that they have accomplished school desegregation with little or no violence. School enrollment statistics, however, indicate that one effect of desegregation has been a movement to the suburbs or to private schools. (Author/AM)

  7. ASARCO to pay over $59 million for damages and cleanup costs at Denver smelting facility

    SciTech Connect

    1993-11-01

    Since 1901, ASARCO, Inc. has owned and operated an 89-acre cadmium-refining smelter in the Globeville neighborhood of north Denver, Colorado. According to complaints filed by EPA and local residents, operations at the smelter have allegedly contaminated the air, ground water, surface water, and soil; contamination from arsenic, cadmium, lead, and zinc has occurred both onsite and offsite. EPA proposed to add the site to the National Priorities List (NPL) in May 1993.

  8. Symposium on Spina Bifida (Denver, Colorado, November, 1969).

    ERIC Educational Resources Information Center

    Colorado Univ., Denver. Medical Center.

    The objectives of the symposium were to define the problems of the child with spina bifida and to present practical means of management, using a multi-disciplinary team approach. Eight papers defining the problem cover the epidemiology of spina bifida, pathophysiology, musculoskeletal defects, incontinence of bladder and bowel, problems of…

  9. Denver Public Schools: Resegregation, Latino Style

    ERIC Educational Resources Information Center

    Lee, Chungmei

    2006-01-01

    The Denver Public Schools (DPS) provide a unique opportunity to study the dynamics of school segregation within the context of rapid demographic changes and key policy changes. This paper, the first of two reports, focuses on the dynamics of segregation, demographic changes, and implications for graduation rates in the Denver Public Schools. It…

  10. Denver's Pioneer Astronomer: Herbert Alonso Howe (1858-1926)

    NASA Astrophysics Data System (ADS)

    Howe, H. J.; Stencel, R. E.; Fisher, S.

    1999-05-01

    Herbert A. Howe arrived at Denver University (DU) to teach autumn 1880 classes, in math, astronomy and surveying. Howe established himself with clever solutions to the Kepler problem for orbit determinations in thesis work at Cincinnati Observatory. Riding the economic expansion of Colorado gold and silver mining in 1888, the University accepted a proposed gift of a major observatory, offered by Denver real estate baron, Humphrey Chamberlin. The result features a 20 inch aperture Alvan Clark refractor, which still ranks among the largest telescopes of the era. With the observatory building ready, the Silver Panic of 1893 -- when the US Congress dropped silver reserves from the currency basis -- burst the Denver economic bubble. Chamberlin was unable to complete payments on the balances due. Clark and G.N.Saegmuller (Fauth and Co.) at personal expense, delivered on the optics and telescope assemblies in 1894, but would wait for repayment. Sadly, this fiscal crisis affected DU for over a decade. Professor Howe, while observatory director, found himself consumed as Dean and Acting Chancellor for a young, struggling university, at the expense of the astronomy future that had looked so bright in 1892. Absent the Silver Panic, Howe would have probably been given an endowed chair in astronomy, as promised by Chamberlin. The complexion of American astronomy at the time of the birth of the American Astronomical Society in 1899 might have been different, in terms of US observing sites, etc. We are fortunate to have extensive Prof.Howe's daily diaries now in the University archives. These describe Howe's view of progress on the observatory, meetings with astronomy notables, plus vignettes of the life and times of Denver and the nation. Grandson, Herbert Julian Howe rediscovered their existence and is summarizing them in the form of a biography entitled: The Pioneer Astronomer. DU archival records contain numerous original letters from late 19th century astronomy luminaries

  11. Effects of using oxygenated fuels on carbon monoxide, formaldehyde and acetaldehyde concentrations in Denver

    SciTech Connect

    Anderson, L.G.; Lanning, J.A.; Wilkes, E.; Jones, R.H.; Wolfe, P.

    1997-12-31

    Oxygenated fuels have been used during the winters in Denver since January 1988, in an attempt to reduce the atmospheric concentration of carbon monoxide. The authors began monitoring ambient concentrations of formaldehyde and acetaldehyde in Denver in December 1987 and have continued that monitoring every winter since. They now have nine seasons of ambient carbonyl data that coincide with oxygenated fuels usage. The authors will present results of the continuing analyses of atmospheric concentration data for CO collected in the Denver area, to determine the effectiveness of the program for reducing ambient CO. The program has been found to have near zero effect at the downtown Denver site, and 5%--12% reductions at several other sites. The formaldehyde and acetaldehyde concentration data will be analyzed to determine the effects of changing oxygenate concentration and composition on carbonyl concentrations. No significant effects have been found on either the concentrations of formaldehyde or acetaldehyde. The authors have also begun analyses of Colorado mandated IM240 emissions test data for CO and NO{sub x} for tests done during an oxygenated fuels period (January, February, November and December 1995) and a nonoxygenated fuels period (April through September 1995). A preliminary analysis of data for more than 100,000 vehicles suggests that oxygenated fuels lead to a reduction of CO emissions of about 13.4% and an increase of NO{sub x} emissions of about 14.6%, as a test fleet weighted average.

  12. 77 FR 23504 - Notice of Inventory Completion: Denver Museum of Nature & Science, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-19

    ... Denver Museum of Nature & Science (then called the Denver Museum of Natural History) and the museum... of the museum, institution, or Federal agency that has control of the Native American human remains... 25, 2008, the museum published a Notice of Inventory Completion (73 FR 10054-10055)......

  13. Archives of Environmental Health, Volume 18 Number 4. Ninth AMA Air Pollution Medical Research Conference, Denver, July 22-24, 1968.

    ERIC Educational Resources Information Center

    Barton, Frank

    Papers read before the Ninth American Medical Association (AMA) Air Pollution Medical Research Conference, Denver, Colorado, July 22-24, 1968, are presented in this document. Topics deal with the relationship and effects of atmospheric pollution to respiratory diseases, epidemiology, human physiological reactions, urban morbidity, health of school…

  14. Colorado as seen from STS-58

    NASA Technical Reports Server (NTRS)

    1993-01-01

    An oblique westward view, across the wheat fields and cattle pastures, of eastern Colorado to the Front Range of the Rocky Mountains. Denver is bisected at the center of the right edge of the frame. Pikes Peak and Colorado Springs are left of center, and the Arkansas River Valley with Canyon City and the Royal Gorge are along the left edge of the frame. This view shows the startling contrast between the nearly-flat High Plains and the ancient geological uplift of the Rockies.

  15. Telehealth: Families Finding Ways to Connect in Rural Colorado

    ERIC Educational Resources Information Center

    Kaiser, Kristen

    2011-01-01

    JFK Partners, at the University of Colorado Denver, School of Medicine, is currently implementing a study on the use of telehealth (receiving treatment or services using videoconferencing technology, such as Skype) and youth with autism spectrum disorder (ASD) and anxiety. The study is an exploratory grant from Health Resources and Services…

  16. Cancer incidence patterns in the Denver metropolitan area in relation to the Rocky Flats plant.

    PubMed

    Crump, K S; Ng, T H; Cuddihy, R G

    1987-07-01

    This study considered whether geographic patterns of cancer suggest any relation with Rocky Flats, a facility located near Denver, Colorado that processes plutonium components for nuclear weapons. The study was based upon cancer incidence data for the years 1969 to 1971 and 1979 to 1981, and census tract data for 1970 and 1980. Data for 1979 to 1981 showed little association with Rocky Flats, even though considerations of the timing of releases of radioactivity from the plant and cancer latency indicate that data from this period should be more indicative of an effect of Rocky Flats than data from the earlier period. The explanatory variable found to be most closely associated with cancer incidence was an urban factor measured by distance from the Colorado State Capitol located in downtown Denver. Indications of correlations of cancer incidence with proximity to Rocky Flats largely disappeared for both time periods when analyses were stratified by this urban factor. This negative finding was not surprising because persons living in the vicinity of the plant have been shown to have no more plutonium in their tissues than persons living in other areas of Colorado. PMID:3591777

  17. Cancer incidence patterns in the Denver metropolitan area in relation to the Rocky Flats plant.

    PubMed

    Crump, K S; Ng, T H; Cuddihy, R G

    1987-07-01

    This study considered whether geographic patterns of cancer suggest any relation with Rocky Flats, a facility located near Denver, Colorado that processes plutonium components for nuclear weapons. The study was based upon cancer incidence data for the years 1969 to 1971 and 1979 to 1981, and census tract data for 1970 and 1980. Data for 1979 to 1981 showed little association with Rocky Flats, even though considerations of the timing of releases of radioactivity from the plant and cancer latency indicate that data from this period should be more indicative of an effect of Rocky Flats than data from the earlier period. The explanatory variable found to be most closely associated with cancer incidence was an urban factor measured by distance from the Colorado State Capitol located in downtown Denver. Indications of correlations of cancer incidence with proximity to Rocky Flats largely disappeared for both time periods when analyses were stratified by this urban factor. This negative finding was not surprising because persons living in the vicinity of the plant have been shown to have no more plutonium in their tissues than persons living in other areas of Colorado.

  18. Building a peer network for a community level HIV prevention program among injecting drug users in Denver.

    PubMed Central

    Simons, P Z; Rietmeijer, C A; Kane, M S; Guenther-Grey, C; Higgins, D L; Cohn, D L

    1996-01-01

    As part of a multi-site Centers for Disease Control and Prevention-funded initiative, a community-level HIV prevention project targeting injection drug users was implemented in the FivePoints community in Denver, Colorado. The protocol for the initiative included the use of peer networks to conduct outreach and disseminate intervention materials to injecting drug users. Since April 1993, project staff established a peer network of 119 participants who distribute approximately 3,000 materials per month. PMID:8862157

  19. 4. CLOSE UP OF FLAME DEFLECTOR, VIEW TOWARDS SOUTHEAST. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. CLOSE UP OF FLAME DEFLECTOR, VIEW TOWARDS SOUTHEAST. - Glenn L. Martin Company, Titan Missile Test Facilities, Captive Test Stand D-1, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

  20. Detail, drivethrough under hoppers, view to southeast. Hungry Horse ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail, drive-through under hoppers, view to southeast. - Hungry Horse Village, Timber Sand Bunker, Approximately 1 mile south of Highway 2 East & 1/4 mile east of Colorado Boulevard, Hungry Horse, Flathead County, MT

  1. 7. COUNTERFORT, NORTHWEST SIDE OF FLAME DEFLECTOR, VIEW TOWARDS SOUTHEAST. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. COUNTERFORT, NORTHWEST SIDE OF FLAME DEFLECTOR, VIEW TOWARDS SOUTHEAST. - Glenn L. Martin Company, Titan Missile Test Facilities, Captive Test Stand D-4, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

  2. 5. SOUTHEAST FLAME DEFLECTOR, VIEW TOWARDS NORTHWEST. Glenn L. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. SOUTHEAST FLAME DEFLECTOR, VIEW TOWARDS NORTHWEST. - Glenn L. Martin Company, Titan Missile Test Facilities, CaptiveTest Stand D-3, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

  3. 6. FLAME DEFLECTOR AND FERROCEMENT APRON, VIEW TOWARD SOUTHEAST. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. FLAME DEFLECTOR AND FERROCEMENT APRON, VIEW TOWARD SOUTHEAST. - Glenn L. Martin Company, Titan Missile Test Facilities, Captive Test Stand D-4, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

  4. 2. FORMER DENVER, SOUTH PARK AND PACIFIC RAILROAD BRIDGE OVER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. FORMER DENVER, SOUTH PARK AND PACIFIC RAILROAD BRIDGE OVER CHALK CREEK, NEAR MT. PRINCETON HOT SPRINGS. VIEW UPSTREAM - Denver South Park & Pacific Railroad Bridge, Spanning Chalk Creek, near Mount Princeton Hot Spring, Romley (historical), Chaffee County, CO

  5. 1. FORMER DENVER, SOUTH PARK AND PACIFIC RAILROAD BRIDGE OVER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. FORMER DENVER, SOUTH PARK AND PACIFIC RAILROAD BRIDGE OVER CHALK CREEK, NEAR MT. PRINCETON HOT SPRINGS. VIEW DOWNSTREAM - Denver South Park & Pacific Railroad Bridge, Spanning Chalk Creek, near Mount Princeton Hot Spring, Romley (historical), Chaffee County, CO

  6. Denver's Urban Ground-Water Quality: Nutrients, Pesticides, and Volatile Organic Compounds

    USGS Publications Warehouse

    Bruce, Breton W.

    1995-01-01

    A recent study by the U.S. Geological Survey (USGS) under the National Water-Quality Assessment (NAWQA) program characterized the ground-water quality in a part of the Denver, Colorado, metropolitan area. The study provides an assessment of water-quality conditions in an alluvial aquifer that drains into the South Platte River. Thirty wells randomly distributed in residential, commercial, and industrial land-use settings were sampled once in 1993 for a broad range of compounds. Nutrients, pesticides, and volatile organic compounds (VOC's), all of which are generally associated with human activities, frequently were detected in the urban wells sampled. Nutrients and VOC's occasionally exceeded drinking-water standards.

  7. Groundwater mining of bedrock aquifers in the Denver Basin - Past, present, and future

    USGS Publications Warehouse

    Moore, J.E.; Raynolds, R.G.; Barkmann, P.E.

    2004-01-01

    The Denver Basin bedrock aquifer system is an important source of water for municipal and agricultural uses in the Denver and Colorado Springs metropolitan areas. The Denver area is one of the fastest growing areas in the United States with a population of 1.2 million in 1960 that has increased to over 2.4 million by 2000. This rapid population growth has produced a corresponding increase in demand for potable water. Historically, the Denver area has relied on surface water, however, in the past 10 years new housing and recreation developments have begun to rely on groundwater from the bedrock aquifers as the surface water is fully appropriated and in short supply. The Denver Basin bedrock aquifer system consists of Tertiary and Cretaceous age sedimentary rocks known as the Dawson, Denver, Arapahoe and Laramie-Fox Hills Aquifers. The number of bedrock wells has increased from 12,000 in 1985 to 33,700 in 2001 and the withdrawal of groundwater has caused water level declines of 76 m. Water level declines for the past 10 years have ranged from 3 to 12 m per year. The groundwater supplies were once thought to last 100 years but there is concern that the groundwater supplies may be essentially depleted in 10 to 15 years in areas on the west side of the basin. Extensive development of the aquifer system has occurred in the last 25 years especially near the center of the basin in Douglas and El Paso Counties where rapid urban growth continues and surface water is lacking. Groundwater is being mined from the aquifer system because the discharge by wells exceeds the rate of recharge. Concern is mounting that increased groundwater withdrawal will cause water level declines, increased costs to withdraw groundwater, reduced well yield, and reduced groundwater storage. As the long-term sustainability of the groundwater resource is in doubt, water managers believe that the life of the Denver Basin aquifers can be extended with artificial recharge, water reuse, restrictions on

  8. PRB CHEMISTRY CASE STUDY: DENVER FEDERAL CENTER

    EPA Science Inventory

    The Denver Federal Center permeable reactive barrier is a funnel-and-gate system with four reactive gates, each separated by up to about 120 m of metal sheet pile. In this study, ground water sampling, core collection, and solid phase characterization studies were carried out in...

  9. Teachers Lead the Way in Denver

    ERIC Educational Resources Information Center

    Nazareno, Lori

    2014-01-01

    This article describes a teacher-led school "Mathematics and Science Leadership Academy" (MSLA) that is part of the Denver Public Schools. At MSLA, teachers collaborate to make authentic and substantive decisions about how the school operates and seek to meet each student's needs. At teacher-led schools, teachers hire their own…

  10. 76 FR 28071 - Notice of Inventory Completion: Colorado Historical Society (History Colorado), Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-13

    ... signs of weathering consistent with prolonged surface exposure. In 1903, human remains representing a..., and two individuals show signs of weathering consistent with prolonged surface exposure. Officials...

  11. 78 FR 72700 - Notice of Inventory Completion: History Colorado, formerly Colorado Historical Society, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-03

    ... consultation with representatives of the Apache Tribe of Oklahoma; Comanche Nation, Oklahoma; Fort Sill Apache Tribe of Oklahoma; Jicarilla Apache Nation, New Mexico; Mescalero Apache Tribe of the Mescalero Reservation, New Mexico; Navajo Nation, Arizona, New Mexico & Utah; San Carlos Apache Tribe of the San...

  12. 76 FR 35010 - Notice of Inventory Completion: Colorado Historical Society (History Colorado), Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-15

    .... The four associated funerary objects are three stone beads and a notched animal bone. Fort Lewis... Register (69 FR 68162-68169, November 23, 2004). Osteological analysis by the Fort Lewis College and Paul... pottery fragments, 1 biface, 1 polishing stone, and 1 sandstone fragment. Osteological analysis by...

  13. 78 FR 50095 - Notice of Inventory Completion: History Colorado, Formerly Colorado Historical Society, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-16

    ... identified as Office of Archaeology and Historic Preservation (OAHP) Case Number 289. Osteological analysis... Archaeology and Historic Preservation). The tribes consulted are those who have ancestral ties to...

  14. Geophysical constraints on the flexural subsidence of the Denver Basin

    NASA Astrophysics Data System (ADS)

    Abdullin, Ayrat

    The Denver Basin is an asymmetric Laramide (Late Cretaceous through Eocene) foreland basin covering portions of eastern Colorado, northwestern Kansas, southwestern Nebraska, and southeastern Wyoming, USA. It is bordered on the west by the Rocky Mountain Front Range Uplift, a basement cored Laramide anticline bounded by thrust faults, and on the east by the Great Plains and stable North American craton. A ˜400 mGal negative Bouguer gravity anomaly exists over the Denver Basin and Front Range Uplift, with its minimum located over the highest topography in the central part of the uplift, approximately 100 km west of the Denver Basin. This study examines three hypotheses concerning the isostatic state of the basin and adjacent Front Range Uplift. These hypotheses are that the modern shape of the basin is due to: 1) flexure of the lithosphere under the surface load of the current topography, or 2) flexure under a subsurface load beneath the Rocky Mountains, or 3) a combination of both surface and subsurface loads. To test these hypotheses, spectral analysis and forward gravity modeling was conducted along three profiles located in the northern, central, and southern parts of the basin. Bouguer gravity power spectra along the profiles reveal 5 major density interfaces interpreted to represent the base of the lithosphere (at depths of 132 to 153 km), base of the crust (45-55 km), a mid-crustal boundary (about 20 km), the top of Precambrian basement (1-2 km), and a boundary between the Pierre Shale and Niobrara Formations within the pre-Laramide sedimentary section (-1-0 km). Flexural modeling shows that the shape of the basin can be fit with an elastic plate model having a line load of magnitude 2-5 × 1012 N/m and an elastic thickness of the lithosphere of 58-80 km. The location of the load is 90-115 km west of the Bouguer gravity minimum on each profile. The gravity anomaly associated with flexural subsidence of the basin, assuming the layered density structure derived

  15. Agronomic factors affecting dryland grain sorghum maturity and production in northeast Colorado

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Grain sorghum [Sorghum bicolor (L.) Moench] is an important dryland crop in southeast Colorado, but expansion into northeast Colorado is thought to be limited due to the shorter growing season. The study examined whether sorghum production could be expanded into northeast Colorado. A 2-year study ...

  16. A Comparison of Web-Based Library Catalogs and Museum Exhibits and Their Impacts on Actual Visits: A Focus Group Evaluation for the Colorado Digitization Project.

    ERIC Educational Resources Information Center

    Fry, Thomas K.; Lance, Keith Curry; Cox, Marti A.; Moe, Tammi

    The Colorado Digitization Project (CDP) commissioned the Library Research Service (LRS) of the Colorado State Library and the University of Denver Library and Information Science Program to evaluate user perceptions of the relative merits of the catalog (or database) and the exhibit approaches to providing access to digital information, especially…

  17. Case Studies of Water Vapor and Surface Liquid Water from AVIRIS Data Measured Over Denver, CO and Death Valley, CA

    NASA Technical Reports Server (NTRS)

    Gao, B.-C.; Kierein-Young, K. S.; Goetz, A. F. H.; Westwater, E. R.; Stankov, B. B.; Birkenheuer, D.

    1991-01-01

    High spatial resolution column atmospheric water vapor amounts and equivalent liquid water thicknesses of surface targets are retrieved from spectral data collected by the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS). The retrievals are made using a nonlinear least squares curve fitting technique. Two case studies from AVIRIS data acquired over Denver-Platteville area, Colorado and over Death Valley, California are presented. The column water vapor values derived from AVIRIS data over the Denver-Platteville area are compared with those obtained from radiosondes, ground level upward-looking microwave radiometers, and geostationary satellite measurements. The column water vapor image shows spatial variation patterns related to the passage of a weather front system. The column water vapor amounts derived from AVIRIS data over Death Valley decrease with increasing surface elevation. The derived liquid water image clearly shows surface drainage patterns.

  18. NREL PV AR D 11th review meeting, May 13--15, 1992, Denver Marriott City Center, Denver, Colorado

    SciTech Connect

    Not Available

    1992-01-01

    This is a collection of abstracts from papers presented at the National Renewable Energy Laboratory (NREL) Photovoltaic (PV) research and development review meeting held May 1992. Subject areas covered include solar cell and solar module manufacturing and development, materials, polycrystalline thin films, applications, amorphous silicon, solar cell performance and testing, crystalline silicon and other photovoltaic and safety perspectives. (GHH)

  19. A Pilot Demonstration of Electrochromic and Thermochromic Windows in the Denver Federal Center, Building 41, Denver, Colorado

    SciTech Connect

    Lee, Eleanor S.; Fernandes, Luis L.; Goudey, Chad Howdy; Jonsson, Carl Jacob; Curcija, D. Charlie; Pang, Xiufeng; DiBartolomeo, Dennis; Hoffmann, Sabine

    2013-07-01

    Chromogenic glazing materials are emerging technologies that tint reversibly from a clear to dark tinted state either passively in response to environmental conditions or actively in response to a command from a switch or building automation system. Switchable coatings on glass manage solar radiation and visible light while enabling unobstructed views to the outdoors. Building energy simulations estimate that actively controlled, near-term chromogenic glazings can reduce perimeter zone heating, ventilation, and airconditioning (HVAC) and lighting energy use by 10-20% and reduce peak electricity demand by 20-30%, achieving energy use levels that are lower than an opaque, insulated wall. This project demonstrates the use of two types of chromogenic windows: thermochromic and electrochromic windows. By 2013, these windows will begin production in the U.S. by multiple vendors at high-volume manufacturing plants, enabling lower cost and larger area window products to be specified. Both technologies are in the late R&D stage of development, where cost reductions and performance improvements are underway. Electrochromic windows have been installed in numerous buildings over the past four years, but monitored energy-efficiency performance has been independently evaluated in very limited applications. Thermochromic windows have been installed in one other building with an independent evaluation, but results have not yet been made public.

  20. 1979 summary of coal resources in Colorado

    SciTech Connect

    Murray, D.K.

    1980-01-01

    Colorado, with 8 coal-bearing regions and 20 coal fields, contains at least 11 percent of the total remaining coal resources of the United States to a depth of 6000 feet. Colorado coals range from early Late Cretaceous to Eocene in age. The higher rank bituminous coals and the largest reserves generally are found in the Upper Cretaceous Dakota and Mesa Verde Groups/Formations in western Colorado. The younger coals, generally of lower rank (subbituminous a to lignite), are found in latest Cretaceous and early Tertiary rocks in the Green River, North and South Park, Raton Mesa, and Denver coal regions. Marginal and premium grades of coking coal are found in the Carbondale, Crested Butte, and Somerset fields, Uinta coal region; in the Trinidad field, Raton Mesa region; and in the Durango field, San Juan River region. Colorado coals range in rank from lignite to anthracite; over 70 percent of the resource is bituminous, approximately 23 percent is subbituminous, 5 percent lignite, and less than one percent anthracite. Moisture, volatile matter, and fixed carbon contents of Colorado coals vary considerably with rank from region to region. According to the U.S. Bureau of Mines, Colorado ranks seventh in the total U.S. demonstrated reserve base of coal (16.3 billion short tons) and fourth in the reserve base of bituminous coal. Furthermore, Colorado ranks first in the reserve base of underground-minable low sulphur bituminous coal. The Green River region produced over 9 million tons of the total 1978 state-wide coal production of 14.3 million tons. Projections for Colorado coal production through 1985 is in the order of 32.2 million tons per year.

  1. 77 FR 12108 - Denver & Rio Grande Railway Historical Foundation d/b/a Denver & Rio Grande Railroad, L.L.C...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-28

    ... Surface Transportation Board Denver & Rio Grande Railway Historical Foundation d/b/a Denver & Rio Grande... of declaratory order proceeding. SUMMARY: In response to a petition filed by the Denver & Rio Grande.... Shank, Denver & Rio Grande Railway Historical ] Foundation, 20 North Broadway Street, Monte Vista,...

  2. Acid clouds and precipitation in eastern Colorado

    NASA Astrophysics Data System (ADS)

    Nagamoto, C. T.; Parungo, F.; Reinking, R.; Pueschel, R.; Gerish, T.

    Rain and snow samples were collected at the eastern foothills of the Rocky Mountains and analyzed for chemical composition. Many precipitation samples had pH values considerably more acidic than the 5.6 value of pure water containing only an equilibrium amount of atmospheric CO 2. Clear and considerable dependencies of the acidity on seasonal synoptic scale weather patterns are demonstrated. Cloud water samples, collected by aircraft over eastern Colorado, also showed low pH values. The acidity of clouds was greatest near the city of Denver.

  3. Capabilities and limitations of existing MST radars: Colorado wind profilers

    NASA Technical Reports Server (NTRS)

    Strauch, R. G.

    1983-01-01

    The Wave Propagation Laboratory is developing a ground-based remote sensing system called PROFILER to measure troposphere parameters currently measured in operational meteorology by radiosondes. The prototype PROFILER uses two radars for wind sounding: a 6-m radar located at Platteville, Colorado, and a 33-cm radar located at Denver's Stapleton International Airport. In addition, a network of three 6-m wind-profiling radars is being installed in Colorado, and a fourth site is planned. The location of the five radars, their characteristics, and their limitations are described.

  4. The New Service: Michelle Jeske--Denver Public Library

    ERIC Educational Resources Information Center

    Library Journal, 2005

    2005-01-01

    It bothers Michelle Jeske that many people still don't know all that their public libraries can do for them, even in Denver, where 80 percent of the population has a library card. Fortunately, as manager of web information services at the Denver Public Library (DPL), she can reach out to people who never come through the library doors. Jeske and…

  5. Teacher Performance Management in Denver Public Schools. Executive Summary

    ERIC Educational Resources Information Center

    New Teacher Project, 2010

    2010-01-01

    In the 2008-2009 school year, The New Teacher Project (TNTP) partnered with Denver Public Schools (DPS) and the Denver Classroom Teachers Association (DCTA) to assess the effectiveness of current teacher performance management policies and practices. DPS and the DCTA have been national leaders in their willingness to examine the difficult issues…

  6. Beyond Averages: School Quality in Denver Public Schools

    ERIC Educational Resources Information Center

    Ooms, Alexander

    2014-01-01

    Since 2009, academic outcomes for students in Denver Public Schools (DPS) have slowly improved. The primary mechanism for increasing academic performance lies within the district's schools, and on an aggregate level Denver has seen a substantial rise in both the number of quality schools and the percentage of students they serve. Every child…

  7. Graduates of Denver Public Schools: College Access and Success

    ERIC Educational Resources Information Center

    Buckley, Pamela; Muraskin, Lana

    2009-01-01

    Denver Public Schools (DPS), the Denver Scholarship Foundation, The Piton Foundation, and the Pell Institute for the Study of Opportunity in Higher Education undertook a study to learn how DPS graduates perform in college. The report describes who enrolls in college, and who persists and earns a college certificate or degree. In addition, the…

  8. Extensive Green Roof Species and Soilless Media Evaluations in Semi-arid Colorado

    EPA Science Inventory

    In the high elevation, semi-arid climate of Colorado, green roofs have not been scientifically tested. This research examined alternative plant species, soilless media blends and plant interactions on an existing, modular-extensive (shallow, 10 cm deep) green roof in Denver, Colo...

  9. Equity in Excellence for Colorado's Future: "A Policy Audit and Analysis"

    ERIC Educational Resources Information Center

    Michelau, Demarée K.

    2014-01-01

    Equity in Excellence is a two-year project launched in 2013 to support the implementation of Colorado's higher education reform agenda. With a focus on the metropolitan Denver area, the project intends to align the state's higher education policies with concrete, equity-focused actions at its public community colleges and four-year institutions.…

  10. A three-dimensional spatial model of plutonium in soil near Rocky Flats, Colorado.

    PubMed

    Webb, S B; Ibrahim, S A; Whicker, F W

    1997-08-01

    The horizontal and depth distribution of plutonium was measured in soil east of the Rocky Flats Environmental Technology Site (formerly the Rocky Flats Plant) near Denver, Colorado, during 1992-1994. The study area was centered on the eastern plume of plutonium contamination and included transects extending from 0.2 km east of the primary origin of the contamination (the 903 Pad) to distances of up to 19 km northeast, east, southeast and south-southeast of the 903 Pad. Soil was collected in 3 cm layers down to 21 cm at exponentially increasing distances along the four transects. Plutonium concentrations decreased rapidly with depth, distance from the 903 Pad, and angle from due east. Depth distributions were independent of distance and angle from the 903 Pad, and our profile model can be used to adjust to a common basis, historical measurements made from sampling to different depths. Based on a total of approximately 1,400 independent measurements, mathematical functions were developed to describe the distance, directional, and depth relationships. These equations, combined with soil density and rock measurements, provided a new method to estimate the plutonium concentration or total deposition per unit area anywhere within the study area. Total deposition per unit area measurements at 50 sites provided an independent test of the model's predictive accuracy. Sampling coefficients of variation based on replicate samples at the main sampling locations averaged 33%, but ranged from 12 to 98%. The analytical measurement coefficient of variation averaged 8%. Mean 0-3 cm soil concentrations of (239,240)Pu among 10 Front Range "background" and 11 community locations near Rocky Flats were 2.1 and 2.3 Bq kg(-1), respectively. PMID:9228169

  11. Anticoagulant rodenticide exposure and toxicosis in coyotes (Canis latrans) in the Denver Metropolitan Area.

    PubMed

    Poessel, Sharon A; Breck, Stewart W; Fox, Karen A; Gese, Eric M

    2015-01-01

    Anticoagulant rodenticides are widely used in urban areas to control rodent pests and are responsible for secondary poisoning in many nontarget wildlife species. We tested the livers of five coyotes (Canis latrans) in the Denver Metropolitan Area, Colorado, US, for anticoagulant rodenticides. All five livers were positive for brodifacoum, with values ranging from 95 ppb to 320 ppb, and one liver was positive for bromadiolone, with a value of 885 ppb. Both of these rodenticides are second-generation anticoagulants, which are more potent and more likely to cause secondary poisoning than first-generation anticoagulants due to their accumulation and persistence in the liver. We concluded that exposure to these rodenticides may have caused the death of at least two of the five coyotes, and urban coyotes in our study area are commonly exposed to rodenticides.

  12. Anticoagulant rodenticide exposure and toxicosis in coyotes (Canis latrans) in the Denver Metropolitan Area.

    PubMed

    Poessel, Sharon A; Breck, Stewart W; Fox, Karen A; Gese, Eric M

    2015-01-01

    Anticoagulant rodenticides are widely used in urban areas to control rodent pests and are responsible for secondary poisoning in many nontarget wildlife species. We tested the livers of five coyotes (Canis latrans) in the Denver Metropolitan Area, Colorado, US, for anticoagulant rodenticides. All five livers were positive for brodifacoum, with values ranging from 95 ppb to 320 ppb, and one liver was positive for bromadiolone, with a value of 885 ppb. Both of these rodenticides are second-generation anticoagulants, which are more potent and more likely to cause secondary poisoning than first-generation anticoagulants due to their accumulation and persistence in the liver. We concluded that exposure to these rodenticides may have caused the death of at least two of the five coyotes, and urban coyotes in our study area are commonly exposed to rodenticides. PMID:25380355

  13. Influence of Transcontinental arch on Cretaceous listric-normal faulting, west flank, Denver basin

    SciTech Connect

    Davis, T.L.

    1983-08-01

    Seismic studies along the west flank of the Denver basin near Boulder and Greeley, Colorado illustrate the interrelationship between shallow listric-normal faulting in the Cretaceous and deeper basement-controlled faulting. Deeper fault systems, primarily associated with the Transcontinental arch, control the styles and causative mechanisms of listric-normal faulting that developed in the Cretaceous. Three major stratigraphic levels of listric-normal faulting occur in the Boulder-Greeley area. These tectonic sensitive intervals are present in the following Cretaceous formations: Laramie-Fox Hills-upper Pierre, middle Pierre Hygiene zone, and the Niobrara-Carlile-Greenhorn. Documentation of the listric-normal fault style reveals a Wattenberg high, a horst block or positive feature of the greater Transcontinental arch, was active in the east Boulder-Greeley area during Cretaceous time. Paleotectonic events associated with the Wattenberg high are traced through analysis of the listric-normal fault systems that occur in the area. These styles are important to recognize because of their stratigraphic and structural influence on Cretaceous petroleum reservoir systems in the Denver basin. Similar styles of listric-normal faulting occur in the Cretaceous in many Rocky Mountain foreland basins.

  14. Southeast Asia

    NASA Technical Reports Server (NTRS)

    2002-01-01

    Home to beautiful jungles, booming industry, and age-old temples, Southeast Asia has become a confluence of ancient and modern life. This true-color image of mainland Southeast Asia was acquired on November 30, 2001, by the Moderate-resolution Imaging Spectroradiometer (MODIS), flying aboard NASA's Terra spacecraft. The body of water in the upper righthand corner of the image is the Gulf of Tonkin. East and southeast of the gulf are the dark green jungles of Vietnam, Laos, and Cambodia. The light brown Mekong River winds its way through the center of the Cambodian jungle and into southern Vietnam. The dark blue patch to the left of the river at the bottom of the image is the Tonle Sap. Literally translated to mean 'Great Lake,' the Tonle Sap is the largest freshwater lake in Southeast Asia. During the rainy season from May to October, the lake will more than double in size growing from its wintertime extent of 3,000 square kilometers to over 7,500 square kilometers. North of the lake, approximately in the center of the image, is a saucer-shaped patch of reddish brown land known as the Khorat Plateau. Situated 90 to 200 meters above sea level in eastern Thailand, the dry plateau is mostly covered with farmland and savanna-type grasses and shrubs. Moving south again, the large body of light blue water at the bottom central portion of the image is the Gulf of Thailand. By switching to the full resolution image (250 meters per pixel) and following the Gulf of Thailand to its northernmost extent, one can see a pinkish beige patch of terrain covered by a faint latticework of fine lines. These are likely to be the network of roads that crisscross Bangkok and its surrounding suburbs and fertile farmland. The narrow strip of land to the east of the Gulf of Thailand is the Malay Peninsula. The body of water to the left of the peninsula is the Gulf of Martaban, which borders Myanmar (Burma). At the far upper lefthand corner of the image, the water has turned light brown from

  15. Colorado composting

    SciTech Connect

    Sheehan, K.

    1994-08-01

    Composting operations come in all shapes and sizes, and there are many variables in operating a successful composting operation. The author looked at two markedly different composting operations in Colorado--the recycling/composting program at the Air Force Academy in Colorado Springs, and the biosolids composting operation at the Upper Eagle Valley Sanitation District, Colorado Springs--to report on how each operation was developed and how both are working today. At the Air Force Academy, a three-acre base for the composting facility was prepared in the fall of 1991. As word of the facility started getting out, people began offering to bring in their clean, green yard trimmings. A Wildcat Compost Turner made it possible for the academy to add a variety of organic matter to the typical yard clippings it was collecting. Material currently being composted at the academy includes a mixture of approximately 15% grass, 25% sod, 10% pine needles, and 50% stable bedding. Four years ago, Colorado's Upper Eagle Valley Consolidated Sanitation District looked to composting as a way to handle its biosolids. A small, two-acre parcel, three miles from the nearest community, was chosen as the composting site. After meeting all of the associated regulations, trucks began hauling biosolids to the site. The sludge was mixed with sawdust and recycled sludge, and then windrowed. The district already has 14,000 cubic yards of compost stored up and ready to go.

  16. 77 FR 23502 - Notice of Inventory Completion: University of Denver Department of Anthropology and Museum of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-19

    ... National Park Service Notice of Inventory Completion: University of Denver Department of Anthropology and Museum of Anthropology, Denver, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The University of Denver Department of Anthropology and Museum of Anthropology, Denver, CO, has completed...

  17. The Creation and Content of an Early "Multicultural" Social Studies Textbook: Learning from "People of Denver"

    ERIC Educational Resources Information Center

    Sevier, Brian R.

    2002-01-01

    Curricular materials of the past have much to offer researchers and educators today. In this article, I examine two pieces of instructional material, a textbook entitled "People of Denver" and a unit on the inequalities of opportunities available to minority groups in Denver. Both these items were written in Denver, by Denver teachers at…

  18. Orphan radon daughters at Denver Radium site

    SciTech Connect

    Holub, R.F.; Droullard, R.F.; Davis, T.H.

    1992-12-31

    During 18 mo of sampling airborne radioactively at a National Priority List ({open_quotes}Superfund{close_quotes}) site in metroPOlitan Denver, Bureau of mines personnel discovered radon daughters that are not supported by the parent radon gas. We refer to them as {open_quotes}orphan{close_quotes} daughters because the parent, radon, is not present in sufficient concentration to support the measured daughter products. Measurements of the {open_quotes}orphan{close_quotes} daughters were made continuously, using the Bureau-developed radon and working-level (radon-daughter) monitors. The data showed high equilibrium ratios, ranging from 0.7 to 3.5, for long periods of time. Repeated, high-volume, 15-min grab samples were made, using the modified Tsivoglou method, to measure radon daughters, to which thoron daughters contributed 26 {+-} 12%. On average 28 {+-} 6% of the particulate activity was contributed by thoron daughters. Most samples were mixtures in which the {sup 218}Po concentration was lower than that of {sup 214}Pb and {sup 214}Bi, in agreement with the high-equilibrium factors obtained from the continuous sampling data. In view of the short half-life of radon progeny, we conclude that the source of the orphan daughters is not far from the Superfund sites. The mechanism of this phenomenon is not understood at this time, but we will discuss its possible significance in evaluating population doses.

  19. Beyond Colorado's Front Range - A new look at Laramide basin subsidence, sedimentation, and deformation in north-central Colorado

    USGS Publications Warehouse

    Cole, James C.; Trexler, James H.; Cashman, Patricia H.; Miller, Ian M.; Shroba, Ralph R.; Cosca, Michael A.; Workman, Jeremiah B.

    2010-01-01

    This field trip highlights recent research into the Laramide uplift, erosion, and sedimentation on the western side of the northern Colorado Front Range. The Laramide history of the North Park?Middle Park basin (designated the Colorado Headwaters Basin in this paper) is distinctly different from that of the Denver basin on the eastern flank of the range. The Denver basin stratigraphy records the transition from Late Cretaceous marine shale to recessional shoreline sandstones to continental, fluvial, marsh, and coal mires environments, followed by orogenic sediments that span the K-T boundary. Upper Cretaceous and Paleogene strata in the Denver basin consist of two mega-fan complexes that are separated by a 9 million-year interval of erosion/non-deposition between about 63 and 54 Ma. In contrast, the marine shale unit on the western flank of the Front Range was deeply eroded over most of the area of the Colorado Headwaters Basin (approximately one km removed) prior to any orogenic sediment accumulation. New 40Ar-39Ar ages indicate the oldest sediments on the western flank of the Front Range were as young as about 61 Ma. They comprise the Windy Gap Volcanic Member of the Middle Park Formation, which consists of coarse, immature volcanic conglomerates derived from nearby alkalic-mafic volcanic edifices that were forming at about 65?61 Ma. Clasts of Proterozoic granite, pegmatite, and gneiss (eroded from the uplifted core of the Front Range) seem to arrive in the Colorado Headwaters Basin at different times in different places, but they become dominant in arkosic sandstones and conglomerates about one km above the base of the Colorado Headwaters Basin section. Paleocurrent trends suggest the southern end of the Colorado Headwaters Basin was structurally closed because all fluvial deposits show a northward component of transport. Lacustrine depositional environments are indicated by various sedimentological features in several sections within the >3 km of sediment

  20. Volatile organic compounds at oil and natural gas production well pads in Colorado and Texas using passive samplers

    EPA Science Inventory

    A pilot study was conducted in application of the U.S. Environmental Protection Agency (EPA) Methods 325A/B variant for monitoring volatile organic compounds (VOCs) near two oil and natural gas (ONG) production well pads in the Texas Barnett Shale formation and Colorado Denver&nd...

  1. 2. Exterior view of instrumentation and gauge panels on southeast ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Exterior view of instrumentation and gauge panels on southeast wall of Signal Transfer Building (T-28A). The piping and tubing visibile in the photograph extends from the structure to the Systems Integration Laboratory Building (T-28) and other structures in the complex. - Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

  2. The Denver Aerosol Sources and Health (DASH) Study: Overview and Early Findings

    PubMed Central

    Vedal, S.; Hannigan, M.P.; Dutton, S.J.; Miller, S. L.; Milford, J.B.; Rabinovitch, N.; Kim, S.-Y.; Sheppard, L.

    2012-01-01

    Improved understanding of the sources of air pollution that are most harmful could aid in developing more effective measures for protecting human health. The Denver Aerosol Sources and Health (DASH) study was designed to identify the sources of ambient fine particulate matter (PM2.5) that are most responsible for the adverse health effects of short-term exposure to PM 2.5. Daily 24-hour PM2.5 sampling began in July 2002 at a residential monitoring site in Denver, Colorado, using both Teflon and quartz filter samplers. Sampling is planned to continue through 2008. Chemical speciation is being carried out for mass, inorganic ionic compounds (sulfate, nitrate and ammonium), and carbonaceous components, including elemental carbon, organic carbon, temperature-resolved organic carbon fractions and a large array of organic compounds. In addition, water soluble metals were measured daily for 12 months in 2003. A receptor-based source apportionment approach utilizing positive matrix factorization (PMF) will be used to identify PM 2.5 source contributions for each 24-hour period. Based on a preliminary assessment using synthetic data, the proposed source apportionment should be able to identify many important sources on a daily basis, including secondary ammonium nitrate and ammonium sulfate, diesel vehicle exhaust, road dust, wood combustion and vegetative debris. Meat cooking, gasoline vehicle exhaust and natural gas combustion were more challenging for PMF to accurately identify due to high detection limits for certain organic molecular marker compounds. Measurements of these compounds are being improved and supplemented with additional organic molecular marker compounds. The health study will investigate associations between daily source contributions and an array of health endpoints, including daily mortality and hospitalizations and measures of asthma control in asthmatic children. Findings from the DASH study, in addition to being of interest to policymakers, by

  3. The Denver Aerosol Sources and Health (DASH) study: Overview and early findings

    NASA Astrophysics Data System (ADS)

    Vedal, S.; Hannigan, M. P.; Dutton, S. J.; Miller, S. L.; Milford, J. B.; Rabinovitch, N.; Kim, S.-Y.; Sheppard, L.

    Improved understanding of the sources of air pollution that are most harmful could aid in developing more effective measures for protecting human health. The Denver Aerosol Sources and Health (DASH) study was designed to identify the sources of ambient fine particulate matter (PM 2.5) that are most responsible for the adverse health effects of short-term exposure to PM 2.5. Daily 24-h PM 2.5 sampling began in July 2002 at a residential monitoring site in Denver, Colorado, using both Teflon and quartz filter samplers. Sampling is planned to continue through 2008. Chemical speciation is being carried out for mass, inorganic ionic compounds (sulfate, nitrate and ammonium), and carbonaceous components, including elemental carbon, organic carbon, temperature-resolved organic carbon fractions and a large array of organic compounds. In addition, water-soluble metals were measured daily for 12 months in 2003. A receptor-based source apportionment approach utilizing positive matrix factorization (PMF) will be used to identify PM 2.5 source contributions for each 24-h period. Based on a preliminary assessment using synthetic data, the proposed source apportionment should be able to identify many important sources on a daily basis, including secondary ammonium nitrate and ammonium sulfate, diesel vehicle exhaust, road dust, wood combustion and vegetative debris. Meat cooking, gasoline vehicle exhaust and natural gas combustion were more challenging for PMF to accurately identify due to high detection limits for certain organic molecular marker compounds. Measurements of these compounds are being improved and supplemented with additional organic molecular marker compounds. The health study will investigate associations between daily source contributions and an array of health endpoints, including daily mortality and hospitalizations and measures of asthma control in asthmatic children. Findings from the DASH study, in addition to being of interest to policymakers, by

  4. Floods of June 1965 in South Platte River basin, Colorado

    USGS Publications Warehouse

    Matthai, Howard Frederick

    1969-01-01

    Heavy, intense rains in three areas on three different days caused outstanding floods on many streams in the South Platte River basin from Plum Creek, just south of Denver, downstream to the Colorado-Nebraska State line. The flood-producing storms followed a relatively wet period, and rainfall of as much as 14 inches in a few hours was reported. The storms occurred over the Greeley-Sterling area on June 14-15, over the Plum Creek and Cherry Creek basins on June 16, and over the headwaters of Kiowa and Bijou Creeks on June 17 after heavy rains on June 15. The flood crest did not pass Julesburg, in the northeast corner of Colorado, until June 20. Previous record high discharges on many tributaries with drainage areas on the plains were exceeded, sometimes severalfold. The six principal tributaries carrying snowmelt runoff were contributing, but not significant, factors in the floods. The attenuation of the peak flow by channel storage as the flood passed through Denver was considerable; yet the peak discharge of 40,300 cfs (cubic feet per second) of the South Platte River at Denver was 1.8 times the previously recorded high of 22,000 cfs in a period of record starting in 1889. The 1965 peak would have been still higher except that all flow from Cherry Creek was stored in Cherry Creek Reservoir. Six persons were drowned, and two other deaths were attributed to the storms. The total damage amounted to $508.2 million, and about 75 percent of this occurred in the Denver metropolitan area. Descriptions of the storms and floods, detailed streamflow records, and information on damages, flood profiles, inundated areas, and flood frequency are included in this report. Several comparisons of the magnitude of the flood are made, and all indicate that an outstanding hydrologic event occurred.

  5. Hayman Fire, Colorado

    NASA Technical Reports Server (NTRS)

    2002-01-01

    The Hayman forest fire, started on June 8, is continuing to burn in the Pike National Forest, 57 km (35 miles) south-southwest of Denver. According to the U.S. Forest Service, the fire has consumed more than 90,000 acres and has become Colorado's worst fire ever. In this ASTER image, acquired Sunday, June 16, 2002 at 10:30 am MST, the dark blue area is burned vegetation and the green areas are healthy vegetation. Red areas are active fires, and the blue cloud at the top center is smoke. Meteorological clouds are white. The image covers an area of 32.2 x 35.2 km (20.0 x 21.8 miles), and displays ASTER bands 8-3-2 in red, green and blue.

    This image was acquired on June 16, 2002 by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA's Terra satellite. With its 14 spectral bands from the visible to the thermal infrared wavelength region, and its high spatial resolution of 15 to 90 meters (about 50 to 300 feet), ASTER will image Earth for the next 6 years to map and monitor the changing surface of our planet.

    ASTER is one of five Earth-observing instruments launched December 18,1999, on NASA's Terra satellite. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and the data products. Dr. Anne Kahle at NASA's Jet Propulsion Laboratory, Pasadena, California, is the U.S. Science team leader; Bjorn Eng of JPL is the project manager. The Terra mission is part of NASA's Earth Science Enterprise, a long-term research and technology program designed to examine Earth's land, oceans, atmosphere, ice and life as a total integrated system.

    The broad spectral coverage and high spectral resolution of ASTER will provide scientists in numerous disciplines with critical information for surface mapping, and monitoring dynamic conditions and temporal change. Example applications are: monitoring glacial advances and retreats

  6. Animation of Panorama of Phoenix Landing Area Looking Southeast

    NASA Technical Reports Server (NTRS)

    2008-01-01

    [figure removed for brevity, see original site] Click on image for animation

    This is an animation of panoramic images taken by NASA's Phoenix Mars Lander's Surface Stereo Imager on Sol 15 (June 9, 2008), the 15th Martian day after landing. The panorama looks to the southeast and shows rocks casting shadows, polygons on the surface and as the image looks to the horizon, Phoenix's backshell gleams in the distance.

    The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

  7. 15. CONCRETE CHECK DAM NORTHWEST OF SOUTHEAST LAKE LADORA (SECTION ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. CONCRETE CHECK DAM NORTHWEST OF SOUTHEAST LAKE LADORA (SECTION 2) WITH THE FORMER EGLI FARM IN THE DISTANCE. - Highline Canal, Sand Creek Lateral, Beginning at intersection of Peoria Street & Highline Canal in Arapahoe County (City of Aurora), Sand Creek lateral Extends 15 miles Northerly through Araphoe County, City & County of Denver, & Adams County to its end point, approximately 1/4 mile Southest of intersectioin of D Street & Ninth Avenue in Adams County (Rocky Mountain Arsenal, Commerce City Vicinity), Commerce City, Adams County, CO

  8. Teacher Retention: Estimating and Understanding the Effects of Financial Incentives in Denver

    ERIC Educational Resources Information Center

    Fulbeck, Eleanor Spindler

    2011-01-01

    Extensive teacher mobility can undermine policy efforts to develop a high-quality workforce. As one response, policymakers have increasingly championed financial incentives as a way to retain teachers. In January, 2006, Denver Public School District, the Denver Classroom Teachers' Association, and Denver voters approved and funded one of the most…

  9. 78 FR 19308 - Notice of Intent To Repatriate Cultural Items: University of Denver Museum of Anthropology...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-29

    ... Anthropology, Denver, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The University of Denver Museum of Anthropology, in consultation with the appropriate Indian tribes, has determined that... University of Denver Museum of Anthropology. DATES: Representatives of any Indian tribe that believes it...

  10. 70. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    70. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. SNAKE RIVER SHALLOWS AFTER TUNNEL CLOSURE; DOWNSTREAM FROM MILNER DAM. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  11. 69. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    69. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. POWER FLUME AND EMPTY RIVER. THE POWER FLUME AFTER GATE CLOSURE. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  12. 74. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    74. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM; LOOKING UP THE EMPTY RIVER BED TOWARD THE MIDDLE DAM. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  13. 45. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    45. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March 1905. SNAKE RIVER BEHIND MILNER DAM; MILNER RESERVOIR RISING. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  14. 48. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    48. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM; WEST VIEW ACROSS DAM FROM MIDDLE DAM; SNAKE RIVER EXITING FROM TUNNELS. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  15. 59. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    59. Photocopy of Photograph (original located in Univ. of Denver collection) C.R. Savage, Photographer, date unknown. MILNER DAM; TUNNEL OUTLETS WITH SNAKE RIVER PASSING THROUGH. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  16. 75. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    75. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. SNAKE RIVER GOING DRY AT MILNER. POWER DITCH AT RIGHT; RIVER IN POOLS FOLLOWING GATE CLOSURE. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  17. 53. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    53. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM TUNNEL CHANNEL AND APPROACH TO TUNNEL GATES. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  18. 47. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    47. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM; RIP-RAPPED UPPER SLOPE OF CENTER DAM; CROWD ALONG CHANNEL TO TUNNELS. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  19. 50. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    50. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM TUNNELS. CHANNEL APPROACHING TUNNELS; SNAKE RIVER PASSING THROUGH. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  20. 64. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    64. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM. WATER FLOODING OVER SPILLWAY FOR FIRST TIME. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  1. 85. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    85. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, date unknown. ROCK CREEK SIPHON, TWIN FALLS COUNTY, SOUTH OF KIMBERLY, IDAHO; EAST VIEW OF SIPHON PIPE. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  2. 86. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    86. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, date unknown. ROCK CREEK SIPHON, TWIN FALLS COUNTY, SOUTH OF KIMBERLY, IDAHO; MEN WORKING ON THE EAST END OF THE SIPHON. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  3. 87. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    87. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, date unknown. ROCK CREEK SIPHON, LOW LINE CANAL, TWIN FALLS COUNTY, SOUTH OF KIMBERLY, IDAHO; UPPER END OF THE SIPHON. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  4. 84. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    84. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, date unknown. ROCK CREEK SIPHON, TWIN FALLS COUNTY, SOUTH OF KIMBERLY, IDAHO; WEST VIEW OF SIPHON PIPE. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  5. 44. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    44. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. NORTH HEADGATES IN FOREGROUND; SPILLWAY AND WEST DAM IN BACKGROUND; SPILLWAY, WEST DAM ARM. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  6. Electronic Book Usage: A Survey at the University of Denver

    ERIC Educational Resources Information Center

    Levine-Clark, Michael

    2006-01-01

    In the spring of 2005, the University of Denver's Penrose Library conducted a survey of its users to determine their degree of awareness of electronic books, how and why they use them, and their level of satisfaction with the format. It is clear from vendor-supplied usage statistics that electronic books are used, but it is not clear how or why…

  7. 62. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    62. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM SPILLWAY. FIRST WATER OVER SPILLWAY. NOTE THAT TUNNELS ARE OPENED AT LEFT -- CLOSURE PROBLEM. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  8. The history of aggregate development in the denver, Co area

    USGS Publications Warehouse

    Langer, W.H.

    2009-01-01

    At the start of the 20th century Denver's population was 203,795. Most streets were unpaved. Buildings were constructed of wood frame or masonry. Transport was by horse-drawn-wagon or rail. Statewide, aggregate consumption was less than 0.25 metric tons per person per year. One hundred years later Denver had a population of 2,365,345. Today Denver is a major metropolitan area at the crossroads of two interstates, home to a new international airport, and in the process of expanding its light rail transit system. The skyline is punctuated with skyscrapers. The urban center is surrounded with edge cities. These changes required huge amounts of aggregate. Statewide, aggregate consumption increased 50 fold to over 13 metric tons per person per year. Denver has a large potential supply of aggregate, but sand and gravel quality decreases downstream from the mountain front and potential sources of crushed stone occur in areas prized for their scenic beauty. These issues, along with urban encroachment and citizen opposition, have complicated aggregate development and have paved a new path for future aggregate development including sustainable resource management and reclamation techniques.

  9. 41. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    41. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. NORTH DAM OF MILNER DAM; DOWNSTREAM AFTER TUNNEL CLOSURE; SILT BERM COMING THROUGH DAM. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  10. 73. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    73. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. SILT FILTERING 'THROUGH NORTH DAM; NORTH DAM FROM DOWNSTREAM SHOWING DIRT FILL FILTERING THROUGH DAM. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  11. 52. Photocopy of Photograph (original located in Univ. of Denver ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    52. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER TUNNEL CLOSURE GATES AND GROUP. GROUP ON GATE PLATFORM JUST BEFORE LOWERING GATES. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  12. Experience in Collaboration: McDenver at McDonald's.

    ERIC Educational Resources Information Center

    Combs, Clarice Sue

    2002-01-01

    The McDenver at McDonald's project provided a nontraditional, community-based teaching and learning environment for faculty and students in a health, physical education, and recreation (HPER) department and a school of nursing. Children and parents come to McDonald's, children received developmental screenings, and parents completed conferences…

  13. Denver's Public Schools: Reforms, Challenges, and the Future

    ERIC Educational Resources Information Center

    Bray, Judy; Medler, Alex

    2009-01-01

    Denver is currently in the national education spotlight, largely because of its willingness to try a unique combination of major education reforms not seen in other large urban school districts. While many observers hold these reforms in high regard, a steep road lies ahead. Current student results are unacceptable by all measures. The time is…

  14. Start with the Facts: Strengthening Denver Public Schools' Education Pipeline

    ERIC Educational Resources Information Center

    Colorado Children's Campaign, 2011

    2011-01-01

    Evaluating student achievement in Denver Public Schools (DPS) starts with taking a hard look at where performance stands. In this report, the researchers examine key transition points across the education pipeline, from preschool through college. They gauge student progress--or lack of progress. And they identify challenges. That way, they can…

  15. ROD MILL ROOM, LOOKING EAST, SHOWING DENVER SPIRAL CLASSIFIER, WITH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    ROD MILL ROOM, LOOKING EAST, SHOWING DENVER SPIRAL CLASSIFIER, WITH DOMINION ROD MILL IN LEFT BACKGROUND. WATER WAS ADDED TO ORE IN ROD MILL TO MAKE A SLURRY CALLED SLIME. - Shenandoah-Dives Mill, 135 County Road 2, Silverton, San Juan County, CO

  16. "Rocky Mountain Talent Search" at the University of Denver

    ERIC Educational Resources Information Center

    Rigby, Kristin

    2005-01-01

    The "Rocky Mountain Talent Search" (RMTS) at the University of Denver was developed based on the talent search model developed by Dr Julian Stanley of Johns Hopkins University. This article summarizes the establishment of RMTS and outlines its contemporary programs. Guided by the philosophy that gifted students have unique needs, require academic…

  17. Colorado amethyst.

    USGS Publications Warehouse

    Michalski, T.C.

    1984-01-01

    Of the 20 or so amethyst localities reported in Colorado, four are described in some detail and comments are given on their geology. The Crystal Hill mine, near La Garita, Saguache County, contains rock crystal (long slender prisms with small rhombohedral terminations) and pale lavender amethyst (generally <3 in. in length). The deposit was worked as early as the 1800's as a gold mine and also contains abundant manganese oxides. Amethyst, associated with argentiferous galena, sphalerite and chalcopyrite, occurs in the Amethyst mine, in the Creede district, on West Willow Creek, Mineral County. The specimens here consist of small pale pinkish-purple crystals interlayered with milky quartz, some as banded forms ("sowbelly agate') and as geode-like vugs. Amethyst also occurs in Unaweep Canyon south of Grand Junction in Mesa County. Pale to very dark amethyst occurs as crystals dominated by large rhombohedra and small prisms (approx 1 in. across). At Red Feather Lakes, Larimer County, amethyst crystals are medium to dark purple and have prism and rhombohedral faces nearly equally developed; some are doubly terminated. -R.S.M.

  18. Pedologic and climatic controls on Rn-222 concentrations in soil gas, Denver, Colorado

    USGS Publications Warehouse

    Asher-Bolinder, S.; Owen, D.E.; Schumann, R.R.

    1990-01-01

    Soil-gas radon concentrations are controlled seasonally by factors of climate and pedology. In a swelling soil of the semiarid Western United States, soil-gas radon concentrations at 100 cm depth increase in winter and spring due to increased emanation with higher soil moisture and the capping effect of surface water or ice. Radon concentrations in soil drop markedly through the summer and fall. The increased insolation of spring and summer warms and dries the soil, limiting the amount of water that reaches 100 cm. Probable controls on the distribution of uranium within the soil column include its downward leaching, its precipitation or adsorption onto B-horizon clays, concretions, or cement, and the uranium content and mineralogy of the soil's granitic and gneissic precursors. -from Authors

  19. RETROSPECTIVE STUDY OF CIPP LINERS USED FOR REHABILITATION IN COLUMBUS, OHIO AND DENVER, COLORADO

    EPA Science Inventory

    Cured-in-place pipe (CIPP) has been successfully used for the rehabilitation of deteriorating wastewater pipes for nearly 30 years in the U.S. However, little quantitative data is available regarding the performance of these liners that can confirm their estimated design life. Wi...

  20. Porosity trends of the Lower Cretaceous J Sandstone, Denver Basin, Colorado

    USGS Publications Warehouse

    Schmoker, J.W.; Higley, D.K.

    1991-01-01

    The petrographic factors that most affect J sandstone porosity variability at a given level of thermal maturity are carbonate cementation and clay content. Carbonate cement, where present, reduces porosity. If previously more widespread, carbonate cement could also introduce porosity heterogeneity by temporarily preserving the pore network relative to uncemented intervals. Abundant detrital and authigenic clay reduces porosity by occupying pores. Low clay content indirectly reduces porosity because the inhibiting effects of clay upon quartz cementation and pressure solution are largely absent. -from Authors

  1. 77 FR 13627 - Notice of Inventory Completion: History Colorado, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-07

    ... bag in fragments; one lock of black hair; one lot of corn cobs; one strand of braided grass; one modified animal bone, possibly a bone bead blank; one lot of cordage fragments; one faunal bone and one... that there was minor deterioration of the bone, suggesting an estimated antiquity of 40 to 150...

  2. 77 FR 11573 - Notice of Inventory Completion: History Colorado, Denver, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-27

    ... Notice of Inventory Completion in the Federal Register (66 FR 10906-10909, Tuesday, February 20, 2001... Register (76 FR 58037-58038, Monday, September 19, 2011). At an unknown date prior to 2002, human remains... Taos, New Mexico; and the Pueblo of Zia, New Mexico. For one case, identified as Office of...

  3. Gamma-emitting radionuclide measurements at the US geological survey national water quality laboratory, Denver, Colorado

    USGS Publications Warehouse

    In, Che Yang; Ambats, E.

    1982-01-01

    Like sediment samples from Scofield Resevior in Utah were analyzed for 210Pb by the gamma-ray spectrometric method. The top 10 cm of surface sediment yielded excess 210Pb activity (excluding in situ 226Ra supported 210Pb) of 1.05 pCi/g dry weight and decreased to 0.25 pCi/g at a depth of 25 cm. Based on these data, sedimentation rate was approximately 0.49 cm/y for a total of 30 cm of lake sediment and a lake history of approximately 60 y. An alternative method of 210Pb measurements using wet chemical procedures followed by beta counting gave equivalent results. ?? 1982.

  4. Invitational Conference on College Prepayment and Savings Plans (Denver, Colorado, June 7-8, 1987). Summary.

    ERIC Educational Resources Information Center

    College Entrance Examination Board, New York, NY.

    Summaries of conference presentations on college savings and prepayment plans and related tax, policy, and social issues are provided. The conference objective was to communicate the issues to constituents with the most at stake: parents, students, and relatives; state and federal legislators and staff; and developers of plans for higher education…

  5. The Dynamics of Academic Productivity. A Seminar (Denver, Colorado, March 2, 1990).

    ERIC Educational Resources Information Center

    Massy, William F.; Zemsky, Robert

    This report is an edited version of the transcript of a seminar held to explore the problem of increasing costs and defining productivity in higher education. The main paper, by William Massey, presents a conceptual model explaining the forces driving up costs in academic departments of institutions of higher education. Under the model there have…

  6. Stormwater-NPDES monitoring program at the Rocky Flats Plant, near Denver, Colorado

    SciTech Connect

    Steele, T.D.; Kunkel, J.R. ); Fiehweg, R.E. )

    1993-01-01

    This paper highlights results of this stormwater NPDES permit-application monitoring program (ASI, 1991b; 1992; 1993). Over a 15-month monitoring period, 32 events were sampled at various surface-water and/or bulk-precipitation sites included in the monitoring network. Evaluation has been made of the effectiveness of obtaining comprehensive hydrograph coverage for a number of storm-runoff/high-flow events as well as in obtaining data over a range of hydrologic conditions and time of year. Examples of event-sample coverage are provided, as well as an assessment of resultant event-generated water-quality data. During the 15-month monitoring period, a total of 116 storm-runoff/high-flow samples (32 events) and 19 bulk-precipitation samples were collected.

  7. Vegetation map of the greater Denver area, Front Range urban corridor, Colorado

    USGS Publications Warehouse

    Marr, J.W.; Boyd, W.S.

    1979-01-01

    Vegetation is one of our most valuable renewable resources; it is the primary producer of organic matter on which all nongreen organisms are dependent for energy, construction materials, aesthetic enjoyment, and other necessities of life. In order to secure the greatest possible returns from the utilization of the different types of vegetation, people need to know what species are present, the ecological processes in which they are involved, and the ways in which they are arranged in the landscape. This vegetation map is designed to help persons in a wide variety of activities to secure that information.

  8. DOE Zero Energy Ready Home Case Study: New Town Builders, Denver, Colorado

    SciTech Connect

    none,

    2013-09-01

    All homes in the Stapleton community must be ENERGY STAR certified; New Town Builders has announced that it will build 250–300 new homes over the next 7–10 years, all of which will be Challenge Homes. New Town received a 2013 Housing Innovation Award in the production builder category.

  9. RETROSPECTIVE STUDY OF CIPP LINERS USED FOR REHABILITATION IN COLUMBUS, OHIO AND DENVER, COLORADO

    EPA Science Inventory

    Cured-in-place pipe (CIPP) has been used for the rehabilitation of deteriorating wastewater pipes for nearly 30 years in the US with much success. However, little quantitative data is available regarding the performance of these liners, which can confirm their estimated design. ...

  10. Mobile Phone and Social Media Use of Homeless Youth in Denver, Colorado.

    PubMed

    Harpin, Scott; Davis, Jillian; Low, Hana; Gilroy, Christine

    2016-01-01

    The purpose of this study was to investigate homeless youth mobile phone and social media use, to plan health promotion efforts. Nearly half (46.7%) of runaway/homeless youth in this sample (n = 181) owned a mobile phone and a majority of those devices were smart phones. Ownership did not vary significantly by shelter location, though regular use of Facebook was more prevalent among those in housing programs or camping, than those living on the streets. Over 90% of youth in the sample reported using Facebook. Such media use might facilitate parent, family, and health provider communications with homeless youth. PMID:27074405

  11. Evidence Use and Advocacy Coalitions: Intermediary Organizations and Philanthropies in Denver, Colorado

    ERIC Educational Resources Information Center

    Scott, Janelle; Jabbar, Huriya; LaLonde, Priya; DeBray, Elizabeth; Lubienski, Christopher

    2015-01-01

    The increasing involvement of philanthropists in education policy has contributed to the emergence of a dynamic sector of intermediary organizations (IOs), entities that serve a number of functions in school reform, including advocacy, consultation, policy design, alternative teacher and leadership preparation, and research. In recent years, many…

  12. Resident perspectives on a dermatology Quality Improvement curriculum: the University of Colorado experience.

    PubMed

    Roberts, Sammie J; Huff, Laura S; Lott, Jason P; Dellavalle, Robert P; Dunnick, Cory A

    2016-01-01

    The Centers for Medicare and Medicaid Services (CMS) have prioritized the objective of optimizing quality healthcare though quality improvement initiatives, yet research on dermatology-specific QI programs and their perceptions among dermatology residents remains limited. We explore residents' opinions of a dermatology-specific QI scholarly project curriculum implemented at University of Colorado Denver (UCD) in 2010 and also evaluate residents' attitudes regarding the value of this curriculum in aiding them to meet ACGME core competencies. PMID:27617468

  13. Seismicity of colorado: consistency of recent earthquakes with those of historical record.

    PubMed

    Simon, R B

    1969-08-29

    Earthquakes instrumentally recorded from 1966 to 1968 have occurred in the same regions of western Colorado, the Arkansas and Platte river valleys, as those felt back to 1870 (from newspaper reports), despite the increasing cultural effects of mining, highway construction, reservoir building, and loading. Thus it appears unnecessary to explain the Denver earthquakes in terms of pressure induced by the introduction of waste fluid. However, the assumption of preexistent tectonic strains in the area of the Rocky Mountain Arsenal seems to be confirmed.

  14. A possible petroleum related helium anomaly in the soil gas, Boulder and Weld Counties, Colorado

    USGS Publications Warehouse

    Roberts, Alan A.; Dalziel, M.C.; Pogorski, L.A.; Quirt, S.G.

    1976-01-01

    A survey of the concentrations of helium in the soil gas conducted over a portion of the Denver Basin in Boulder and Weld Counties, Colorado, supports the existence of a potential petroleum prospect that was suggested by earlier geochemical analyses of the outcropping sandstones. The helium survey technique may prove to be a rapid, inexpensive, and valuable surface prospecting tool for detecting buried petroleum deposits.

  15. Ozone Precursor Trends in Colorado and Their Relevance to Oil and Gas Development

    NASA Astrophysics Data System (ADS)

    Pierce, G. E.; Frazier, A. C.

    2015-12-01

    Oil and gas development has occurred in Colorado for over 150 years. With the increasing use of horizontal drilling and hydraulic fracturing, development of shale oil resources has increased significantly during the past ten years. One of the areas is the Denver-Julesburg (D-J) Basin in northeast Colorado, where there are now over 20,000 active wells. The North Front Range area of Colorado, including Denver, is a non-attainment area for ozone, where emissions from oil and gas development in the D-J Basin are a major concern. If a lower ozone standard is promulgated by EPA, other areas of Colorado will likely be designated as non-attainment as well. Colorado has instituted a number of regulations on the oil and gas industry over the past decade to help reduce emissions. The Denver metropolitan area has also grown significantly over the past decades to a population of over 2.6 million, which adds an urban component to the mix of ozone precursor emissions. Ambient monitoring of ozone precursors, including non-methane organic compounds and carbonyls, has been performed at a number of locations in the North Front Range area of Colorado over the past 12 years. Two of these sites have been in continuous operation since 2012; one site is located in the core of the city of Denver, while the other is located in the center of the oil and gas development area and has recorded high levels of ethane. Additionally, air monitoring sites operating on the western slope of Colorado that includes the Piceance Basin have data as far back as 2004. We present trends from the ozone precursor monitoring conducted in Colorado, and discuss how these precursors may contribute to ozone formation, particularly those related to oil and gas development. These data are valuable for emissions inventory work and model validation related to upcoming State Implementation Plans for ozone. The data will also be used in association with the 2014 Front Range Air Pollution and Photochemistry Experiment

  16. Serum antibodies to Giardia lamblia by age in populations in Colorado and Thailand.

    PubMed Central

    Janoff, E. N.; Taylor, D. N.; Echeverria, P.; Glode, M. P.; Blaser, M. J.

    1990-01-01

    We measured levels of antibodies to Giardia lamblia by age in serum specimens from persons in Denver, Colorado, and Soongnern, Thailand. Serum levels of immunoglobulin (Ig) G, IgM, and IgA G lamblia-specific antibodies measured by enzyme-linked immunosorbent assay increased substantially during childhood in both geographic areas, although children in Soongnern showed significantly higher mean levels of each antibody class (P less than .05). After adolescence, levels of G lamblia-specific IgM fell steadily with age in both populations. In contrast, specific IgA levels remained elevated throughout life among the Thai but decreased to low levels among adults in Denver. Similarly, rates of carriage of G lamblia were high among children aged 1 to 4 years in Denver and Soongnern (14.3% versus 26.5%, respectively) but were much lower among adults in Denver (0% versus 14%; P less than .01). These data suggest that levels of G lamblia-specific IgM may reflect exposure to the parasite early in life in both areas. Levels of parasite-specific IgA may reflect recurrent exposure to G lamblia in Soongnern, where G lamblia is endemic, but less frequent exposure to the parasite in Denver, where exposure is often episodic. PMID:2333701

  17. City and County of Denver: Technical comparison between hythane, CNG and gasoline fueled vehicles

    SciTech Connect

    1996-07-01

    The City and County of Denver, in cooperation with the Urban Consortium Energy Task Force of Public Technology, Inc. has completed a unique two-year research and development project designed to test and compare the technical merits of three transportation fuels. Comparisons of the tailpipe emissions from Hythane - a new, blended, alternative motor fuel comprised of 85% compressed natural gas (CNG) and 15% hydrogen measured by volume - to the emissions from gasoline and 100% CNG were conducted. This project has been one of the first pioneering studies of a hydrogen blended fuel and, through its success, has prompted eight additional Hythane research projects to date. Phase I of the project provided results from the Federal Test Procedure (FTP) testing of a light duty pick-up truck operating on Hythane. The purpose of this testing was to quantify any decrease in tailpipe emissions and to determine whether Hythane could meet the California Ultra Low Emission Vehicle standard (ULEV) for light duty trucks. During Phase I, FTP analyses were conducted in both Colorado (high altitude testing) and California (sea level testing) on a converted Chevrolet S-10, pick-up truck by Hydrogen Consultants (HCl), the Colorado Department of Health (CDH) and the California Air Resource Board (CARB). Currently, the only other non-electric vehicle which is capable of meeting the ULEV standard is Chrysler`s natural gas vehicle. There was additional interest in the role Hythane could play as a transitional fuel in the introduction of hydrogen. Hydrogen, a renewable energy carrier, may soon be categorized as a ZEV fuel by the South Coast Air Quality Management District. This factor may encourage the use of Hythane as a transportation fuel that not only meets the ULEV standard, but may provide the bridge necessary to the eventual widespread use of hydrogen.

  18. Seismic expression of structural features on Landsat lineaments: an example from Denver basin

    SciTech Connect

    Shurr, G.W.; Jenkins, J.T. Jr.; Likarish, D.M.

    1985-02-01

    Lineaments interpreted from Landsat images mark the location and trend of basement faults observed on seismic lines in the eastern Denver basin. Linear features mapped as tone and texture patterns on multispectral scanner images in northeastern Colorado and southwestern Nebraska are used to interpret regional lineaments. Individual linear features up to 25 mi (40 km) long and visible on both bands 5 and 7 define a grid of regional lineaments trending northeast and northwest. Comparisons of lineaments with aeromagnetic and gravity maps and with interpretations of basement geology suggest that lineaments are the boundaries of basement blocks with areas of about 1000 mi/sup 2/ (2590 km/sup 2/). Constituent linear features within the lineament zone probably mark boundaries of smaller blocks of about 50 mi/sup 2/ (130 km/sup 2/). Seismic lines in northeastern Sedgwick County in extreme northeastern Colorado cross linear features that are components of a broad regional lineament that trends northeast and parallels the South Platte River. Seismic data consist of a grid of about 100 mi (160 km) of multifold Vibroseis lines. Basement faults, generally with offsets of less than 100 ft (30 m), are observed in seismic lines that cross some individual linear features. Monoclines and faults are present in Pennsylvanian to Tertiary strata that overlie basement. A time-structure map on the Precambrian and an isochron map of Wolfcamp (Lower Permian) to Precambrian show that the lineament is a 7-mi (11-km) wide zone of small, downdropped basement blocks. Thickening of Permian-Pennsylvanian strata on the downthrown side of faults suggests tectonic activity. Further tectonic activity is indicated by listric faulting in the Cretaceous Niobrara Formation.

  19. Clutter modeling of the Denver Airport and surrounding areas

    NASA Technical Reports Server (NTRS)

    Harrah, Steven D.; Delmore, Victor E.; Onstott, Robert G.

    1991-01-01

    To accurately simulate and evaluate an airborne Doppler radar as a wind shear detection and avoidance sensor, the ground clutter surrounding a typical airport must be quantified. To do this, an imaging airborne Synthetic Aperture Radar (SAR) was employed to investigate and map the normalized radar cross sections (NRCS) of the ground terrain surrounding the Denver Stapleton Airport during November of 1988. Images of the Stapleton ground clutter scene were obtained at a variety of aspect and elevation angles (extending to near-grazing) at both HH and VV polarizations. Presented here, in viewgraph form with commentary, are the method of data collection, the specific observations obtained of the Denver area, a summary of the quantitative analysis performed on the SAR images to date, and the statistical modeling of several of the more interesting stationary targets in the SAR database. Additionally, the accompanying moving target database, containing NRCS and velocity information, is described.

  20. Episodic incision of the Colorado River in Glen Canyon, Utah

    USGS Publications Warehouse

    Garvin, C.D.; Hanks, T.C.; Finkel, R.C.; Heimsath, A.M.

    2005-01-01

    Incision rates of the Colorado River are integral to understanding the development of the Colorado Plateau. Here we calculate episodic incision rates of the Colorado River based on absolute ages of two levels of Quaternary deposits adjacent to Glen Canyon, Utah, along the north flank of Navajo Mountain. Minimum surface ages are determined by a combination of cosmogenic radionuclide surface exposure ages, uranium series and soil-development formation times. Bedrock incision rates of the Colorado River between c. 500 ka and c. 250 ka, and c. 250 ka to present are c. 0??4 m ka-1 and c. 0??7 m ka-1, respectively. These rates are more than double the rates reported in the Grand Canyon, suggesting that the Colorado River above Lees Ferry is out of equilibrium with the lower section of the river. We also determine incision rates of two tributaries to the Colorado River. Oak Creek and Bridge Creek flow off Navajo Mountain into Glen Canyon from the southeast. Oak Creek and Bridge Creek both have incision rates of c. 0??6 m ka-1 over the past c. 100 ka at points about 9 km away from the main stem of the Colorado River. Copyright ?? 2005 John Wiley & Sons, Ltd.

  1. Planning for the conservation and development of infrastructure resources in urban areas; Colorado Front Range urban corridor

    USGS Publications Warehouse

    Arbogast, Belinda F.; Arnold, L. Rick; Fishman, Neil S.; Langer, William H.; Mladinich, Carol S.; Roelle, James E.; Wilburn, David R.; Knepper, Daniel H.

    2002-01-01

    This Circular provides a basic understanding of the characteristics, location, distribution, and quality of infrastructure resources (natural aggregate, energy, and water) in the Colorado Front Range urban corridor between Denver and Ft. Collins. With this understanding, the reader explores the many factors that affect the current and future availability of those resources, including the socioeconomic aspects of the resources and the complexly interwoven individual and collective interests that policymakers, decisionmakers, and the public must address.

  2. Comparisons of urban and rural PM10-2.5 and PM2.5 mass concentrations and semi-volatile fractions in northeastern Colorado

    NASA Astrophysics Data System (ADS)

    Clements, Nicholas; Hannigan, Michael P.; Miller, Shelly L.; Peel, Jennifer L.; Milford, Jana B.

    2016-06-01

    Coarse (PM10-2.5) and fine (PM2.5) particulate matter in the atmosphere adversely affect human health and influence climate. While PM2.5 is relatively well studied, less is known about the sources and fate of PM10-2.5. The Colorado Coarse Rural-Urban Sources and Health (CCRUSH) study measured PM10-2.5 and PM2.5 mass concentrations, as well as the fraction of semi-volatile material (SVM) in each size regime (SVM2.5, SVM10-2.5), from 2009 to early 2012 in Denver and comparatively rural Greeley, Colorado. Agricultural operations east of Greeley appear to have contributed to the peak PM10-2.5 concentrations there, but concentrations were generally lower in Greeley than in Denver. Traffic-influenced sites in Denver had PM10-2.5 concentrations that averaged from 14.6 to 19.7 µg m-3 and mean PM10-2.5 / PM10 ratios of 0.56 to 0.70, higher than at residential sites in Denver or Greeley. PM10-2.5 concentrations were more temporally variable than PM2.5 concentrations. Concentrations of the two pollutants were not correlated. Spatial correlations of daily averaged PM10-2.5 concentrations ranged from 0.59 to 0.62 for pairs of sites in Denver and from 0.47 to 0.70 between Denver and Greeley. Compared to PM10-2.5, concentrations of PM2.5 were more correlated across sites within Denver and less correlated between Denver and Greeley. PM10-2.5 concentrations were highest during the summer and early fall, while PM2.5 and SVM2.5 concentrations peaked in winter during periodic multi-day inversions. SVM10-2.5 concentrations were low at all sites. Diurnal peaks in PM10-2.5 and PM2.5 concentrations corresponded to morning and afternoon peaks of traffic activity, and were enhanced by boundary layer dynamics. SVM2.5 concentrations peaked around noon on both weekdays and weekends. PM10-2.5 concentrations at sites located near highways generally increased with wind speeds above about 3 m s-1. Little wind speed dependence was observed for the residential sites in Denver and Greeley. The mass

  3. Passive Wake Acoustics Measurements at Denver International Airport

    NASA Technical Reports Server (NTRS)

    Wang, Frank Y.; Wassaf, Hadi; Dougherty, Robert P.; Clark, Kevin; Gulsrud, Andrew; Fenichel, Neil; Bryant, Wayne H.

    2004-01-01

    From August to September 2003, NASA conducted an extensive measurement campaign to characterize the acoustic signal of wake vortices. A large, both spatially as well as in number of elements, phased microphone array was deployed at Denver International Airport for this effort. This paper will briefly describe the program background, the microphone array, as well as the supporting ground-truth and meteorological sensor suite. Sample results to date are then presented and discussed. It is seen that, in the frequency range processed so far, wake noise is generated predominantly from a very confined area around the cores.

  4. Chemists gather in denver to get the big picture.

    PubMed

    Amato, I

    1993-04-16

    The Rockies were hidden by clouds, but "Welcome ACS" signs were visible all over the Mile High City from 28 March to 2 April. No wonder the city's boosters were cheering: More than 10,000 scientists, purveyors of laboratory equipment, and other chemophiles had flooded into Denver to take in a vision of chemistry's intellectual scope that was wide enough to compensate for the missing scenic grandeur. In just a tiny sampling of the roughly 4800 presentations, chemistry appears in guises ranging from the most basic molecule making, through cleanup strategies for major environmental challenges, to forensic methods for unraveling a historical mystery.

  5. Colorado Children's Budget 2005

    ERIC Educational Resources Information Center

    Colorado Children's Campaign, 2005

    2005-01-01

    The Children's Budget is a comprehensive report on funding for children's services in Colorado. This report provides a six- year funding history for more than 50 programs funded with state, local, and federal dollars. The Colorado Children's Budget analyzes reductions in programs and services during the economic downturn. The data in the…

  6. Colorado Children's Budget 2011

    ERIC Educational Resources Information Center

    Colorado Children's Campaign, 2011

    2011-01-01

    "Colorado Children's Budget 2011" tallies up Colorado's public investments during FY 2007-08 through FY 2011-12 for programs and services that enhance the well-being of children across four domains--Early Childhood, K-12 Education, Health, and Other Supports. It is intended to be a resource guide for policymakers and advocates who are interested…

  7. Colorado State University

    ERIC Educational Resources Information Center

    McKelfresh, David A.; Bender, Kim K.

    2009-01-01

    Colorado State University (CSU) is located in Fort Collins, which is a midsize city of 134,000 situated in Northern Colorado at the western edge of the Great Plains and at the base of the Rocky Mountains. CSU's total enrollment is approximately 25,000 students. The Division of Student Affairs comprises 30 departments organized into programmatic…

  8. Colorado Children's Budget 2012

    ERIC Educational Resources Information Center

    Buck, Beverly; Cuciti, Peggy L.; Baker, Robin

    2012-01-01

    The "Colorado Children's Budget 2012" examines the state's commitment to investing in the well-being of children. It tallies up Colorado's actual and planned investment during the past five years (Fiscal Year (FY) 2008-2009 through FY 2012-2013) on programs and services in four areas: Early Childhood Learning and Development, K-12 Education,…

  9. Colorado`s Pollution-Prevention Partnership

    SciTech Connect

    Ferraro, P.

    1994-12-31

    The Colorado Pollution Prevention Partnership is a nonprofit, voluntary alliance of government, business, and public interest groups organized in 1990 to develop and promote pollution prevention and waste minimization in Colorado industries. The partnership started with discussions between two individuals concerning a difficulty in a public-private working relationship. The discussions soon expanded to several individuals meeting on a regular basis, then to informal breakfast meetings with representatives from industry, EPA, and the Colorado Department of Health (CDH). Eventually, organizations representing the public interest joined the discussions. The goals of the partnership are clear: strengthen the working relationship between the private and public sectors; improve capabilities for anticipating and avoiding environmental problems; pool resources and focus attention on the mutual goal of pollution prevention; and exchange information and expertise, and help transfer these to medium and small companies and the general public.

  10. Hydraulic and geochemical performance of a permeable reactive barrier containing zero-valent iron, Denver Federal Center

    USGS Publications Warehouse

    McMahon, P.B.; Dennehy, K.F.; Sandstrom, M.W.

    1999-01-01

    The hydraulic and geochemical performance of a 366 m long permeable reactive barrier (PRB) at the Denver Federal Center; Denver, Colorado, was evaluated. The funnel and gate system, which was installed in 1996 to intercept and remediate ground water contaminated with chlorinated aliphatic hydrocarbons (CAHs), contained four 12.2 m wide gates filled with zero-valent iron. Ground water mounding on the upgradient side of the PRB resulted in a tenfold increase in the hydraulic gradient and ground water velocity through the gates compared to areas of the aquifer unaffected by the PRB. Water balance calculations for April 1997 indicate that about 75% of the ground water moving toward the PRB from upgradient areas moved through the gates. The rest of the water either accumulated on the upgradient side of the PRB or bypassed the PRB. Chemical data from monitoring wells screened down-gradient, beneath, and at the ends of the PRB indicate that contaminants had not bypassed the PRB, except in a few isolated areas. Greater than 99% of the CAH mass entering the gates was retained by the iron. Fifty-one percent of the CAH carbon entering one gate was accounted for in dissolved C1 and C2 hydrocarbons, primarily ethane and ethene, which indicates that CAHs may adsorb to the iron prior to being dehalogenated. Treated water exiting the gates displaced contaminated ground water at a distance of at least 3 m downgradient from the PRB by the end of 1997. Measurements of dissolved inorganic ions in one gate indicate that calcite and siderite precipitation in the gate could reduce gate porosity by about 0.35% per year. Results from this study indicate that funnel and gate systems containing zero-valent iron can effectively treat ground water contaminated with CAHs. However, the hydrologic impacts of the PRB on the flow system need to be fully understood to prevent contaminants from bypassing the PRB.

  11. Case Study for the ARRA-funded Ground Source Heat Pump Demonstration at Denver Museum of Nature & Science

    SciTech Connect

    Im, Piljae; Liu, Xiaobing

    2015-11-30

    High initial costs and lack of public awareness of ground-source heat pump (GSHP) technology are the two major barriers preventing rapid deployment of this energy-saving technology in the United States. Under the American Recovery and Reinvestment Act (ARRA), 26 GSHP projects were competitively selected and carried out to demonstrate the benefits of GSHP systems and innovative technologies for cost reduction and/or performance improvement. This report highlights the findings of a case study of one such GSHP demonstration projects that uses a recycled water heat pump (RWHP) system installed at the Denver Museum of Nature & Science in Denver, Colorado. The RWHP system uses recycled water from the city’s water system as the heat sink and source for a modular water-to-water heat pump (WWHP). This case study was conducted based on the available measured performance data from December 2014 through August 2015, utility bills of the building in 2014 and 2015, construction drawings, maintenance records, personal communications, and construction costs. The annual energy consumption of the RWHP system was calculated based on the available measured data and other related information. It was compared with the performance of a baseline scenario— a conventional VAV system using a water-cooled chiller and a natural gas fired boiler, both of which have the minimum energy efficiencies allowed by ASHRAE 90.1-2010. The comparison was made to determine energy savings, operating cost savings, and CO2 emission reductions achieved by the RWHP system. A cost analysis was performed to evaluate the simple payback of the RWHP system. Summarized below are the results of the performance analysis, the learned lessons, and recommended improvement in the operation of the RWHP system.

  12. 2. Exterior view of Components Test Laboratory (T27), looking southeast. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Exterior view of Components Test Laboratory (T-27), looking southeast. The building wing on the left houses the equipment room and that on the right houses Test Cell 8 (oxidizer) and the oxidizer storage pit or vault. - Air Force Plant PJKS, Systems Integration Laboratory, Components Test Laboratory, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

  13. 3. Exterior view of Components Test Laboratory (T27), looking southeast. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Exterior view of Components Test Laboratory (T-27), looking southeast. The building wing on the left houses the equipment room, and that on the right houses Test Cell 8 (oxidizer) and the oxidizer storage pit or vault. - Air Force Plant PJKS, Systems Integration Laboratory, Components Test Laboratory, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

  14. Comparison between the development of Malaysian and Denver children.

    PubMed

    Chen, S T

    1989-01-01

    126 Malay children from higher income families were followed-up regularly from birth to six years of age in the University Hospital, Kuala Lumpur. Their developmental performance was compared to that of Denver children. Generally, Malaysian and Denver children appear to be similar in their development during the first six years of life except for some minor differences in the personal-social, language and gross motor sectors. Malaysians appear to be slower in self-care but more advanced in "helping around the house", "playing interactive games" and in "separating from mother". They were slightly slower in gross motor function during the first year of life but more advanced during the second year of life. However, they were slightly more advanced in language development. The differences in development between the two groups of children are discussed and it is concluded that the differences can partly be explained by differences in socio-economic or cultural differences between the two groups of children. However, the influence of genetic factors cannot be dismissed.

  15. Denver Potable Water Reuse Demonstration Project: comprehensive chronic rat study.

    PubMed

    Condie, L W; Lauer, W C; Wolfe, G W; Czeh, E T; Burns, J M

    1994-11-01

    The health effects testing program for the Denver Water Department's Potable Water Reuse Demonstration Project was designed to evaluate the relative health effects of highly treated reclaimed water derived from secondary wastewater in comparison with Denver's present high-quality drinking water. The 1 x 10(6) gal/day treatment plant provided 500-fold concentrates of water that had been treated by multiple processes to remove microbial and chemical contaminants. Fischer 344 rats were exposed to the complex mixture solutions for up to 2 yr to evaluate chronic toxicity and oncogenicity effects. The following parameters were evaluated: clinical observations, survival rate, growth, food and water consumption, haematology, clinical chemistry, urinalysis, organ weights, gross autopsy and histopathological examination of all lesions, major tissues and organs. Clinical pathology, gross pathology, and microscopic pathology conducted at wk 26 and 65 and at the end of the study did not reveal any findings that could be considered to be treatment related. Administration of drinking water concentrates at up to 500 times the original concentration in the original water samples to F344 rats for up to 104 wk did not result in any overt toxicological or carcinogenic effects. PMID:7959456

  16. 76 FR 80401 - Notice of Inventory Completion: University of Denver Department of Anthropology and Museum of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-23

    ... Gila Plain Sites. In the Federal Register (66 FR 55957-55958, Monday, November 5, 2001) paragraph... National Park Service Notice of Inventory Completion: University of Denver Department of Anthropology and Museum of Anthropology, Denver, CO; Correction AGENCY: National Park Service, Interior. ACTION:...

  17. Teacher Vote on Merit Pay down to Wire: Denver Poll Shows Issue in Hands of "Undecideds"

    ERIC Educational Resources Information Center

    Keller, Bess

    2004-01-01

    This article discusses the city of Denver's poll on a new teacher-compensation plan. The poll showed those who had made up their minds to be about evenly divided, leaving more than 20 percent undecided. Proponents have been making the rounds at schools in recent weeks to try winning teachers over to their side. If members of the Denver Classroom…

  18. Great Expectations, Mixed Results: Standards and Performance in Denver's New Public Schools, 2007-2011

    ERIC Educational Resources Information Center

    Ooms, Alexander

    2012-01-01

    In conjunction with the Denver Plan instituted in 2005, Denver Public Schools (DPS) has embarked upon a consistent strategy of opening new schools in an effort to improve overall academic performance. DPS has pursued this strategy under several different paths: an annual request for proposals from charter school applicants; allowing current…

  19. Preschool Developmental Screening with Denver II Test in Semi-Urban Areas

    ERIC Educational Resources Information Center

    Eratay, Emine; Bayoglu, Birgül; Anlar, Banu

    2015-01-01

    Purpose: To assess the feasibility and reliability of screening semi-urban preschool children with Denver II, developmental and neurological status was examined in relation with one-year outcome. Methodology: Denver II developmental screening test was applied to 583 children who visited family physicians or other health centers in a province of…

  20. 77 FR 23501 - Notice of Intent To Repatriate Cultural Item: University of Denver Department of Anthropology and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-19

    ... Anthropology and Museum of Anthropology, Denver, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The University of Denver Department of Anthropology and Museum of Anthropology, in consultation... with the cultural item may contact the University of Denver Department of Anthropology and Museum...

  1. 77 FR 5839 - Notice of Intent To Repatriate a Cultural Item: University of Denver Department of Anthropology...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-06

    ... Anthropology and Museum of Anthropology, Denver, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The University of Denver Department of Anthropology and Museum of Anthropology, in consultation... item may contact the University of Denver Department of Anthropology and Museum of Anthropology....

  2. 8. View of interior facing southeast, showing southeast corner of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. View of interior facing southeast, showing southeast corner of early 19th century room on second floor - First Free Will Baptist Church, Parsonage, South side of Dover Road, corner of Blackhall Road, Epsom, Merrimack County, NH

  3. 51. Ground floor, southeast corner, looking southeast in mezzanine (original ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    51. Ground floor, southeast corner, looking southeast in mezzanine (original function unknown) - Sheffield Farms Milk Plant, 1075 Webster Avenue (southwest corner of 166th Street), Bronx, Bronx County, NY

  4. 5. SOUTHEAST CORNER OF EAST TELEVISION CAMERA TOWER. SOUTHEAST FACE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. SOUTHEAST CORNER OF EAST TELEVISION CAMERA TOWER. SOUTHEAST FACE OF MST IN BACKGROUND. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  5. Denver Developmental Screening Test survey of Bangkok children.

    PubMed

    Sriyaporn, P P; Pissasoontorn, W; Sakdisawadi, O

    1994-01-01

    A preliminary developmental survey (using DDST) of 1442 Bangkok children who were between the ages of two weeks and six years was conducted between June 1983 and December 1987. The results of this study showed that the 25th percentile for the development of Bangkok children in the areas of personal-social, fine motor adaptive, language and gross motor skills were comparable to the children in original samples in Denver. Although the Bangkok group seems to have passed many test items at earlier ages, the 75th-90th percentile in each test item was generally more delayed in the Bangkok group. The investigative team suggests that further research for the purpose of establishing a norm for the DDST be pursued on the basis of geographical sampling more than socioeconomical sampling that was used in this study.

  6. Low-BTU gas in the Rocky Mountain region - Colorado, Wyoming, New Mexico, and Utah

    SciTech Connect

    Tremain, C.M. ); Broadhead, R.E. ); Chidsey, T.C. Jr. ); Doelger, M. ); Morgan, C.D. )

    1993-08-01

    There are over 100 reservoirs in Colorado, Wyoming, New Mexico, and Utah that produce or could produce low-BTU (heating value less than 900 BTU/ft[sup 3]) gas. Reservoirs range in age from Devonian to Cretaceous; reservoir lithologies include both carbonates and sandstones. Frequently, the low-BTU gas (CO[sub 2], N[sub 2], and He) is a byproduct of normal hydrocarbon production. CO[sub 2]-rich gas occurs in southwest to east-central Utah, in the southeastern Paradox basin (Utah and Colorado), in the North Park basin (Colorado), in southeast Colorado and northeast New Mexico, and in the Green River and Wind River basins (Wyoming). Five fields produce nearly pure (98%) CO[sub 2]. The 1990 annual CO[sub 2] production from these fields was North and South McCallum (Colorado), 1.7 bcf; McElmo (Colorado), 205 bcf; Sheep Mountain (Colorado), 70.7 bcf; and Bravo Dome (New Mexico), 119.7 bcf. Big Piney-LaBarge (Wyoming) produced 120 bcf of CO[sub 2] (at a concentration of 65%) in 1990. Most of the CO[sub 2] is used in enhanced oil recovery. Nitrogen-rich gas is found in the southern Green River basin (Utah and Wyoming), east flank of the San Rafael uplift (Utah), northern Paradox basin (Utah), Uncompahgre uplift (Utah and Colorado), Douglas Creek arch (Colorado), Hugoton embayment (Colorado), Las Animas arch (Colorado), Permian basin (New Mexico), and Four Corners platform (New Mexico). Helium is sometimes associated with the nitrogen and in concentrations of up to 8% in New Mexico and Colorado, 2.8% in Utah, and 1% in Wyoming.

  7. Denver Papillae Protocol for Objective Analysis of Fungiform Papillae

    PubMed Central

    Nuessle, Tiffany M.; Garneau, Nicole L.; Sloan, Meghan M.; Santorico, Stephanie A.

    2015-01-01

    The goal of the Denver Papillae Protocol is to use a dichotomous key to define and prioritize the characteristics of fungiform papillae (FP) to ensure consistent scoring between scorers. This protocol builds off of a need that has arisen from the last two decades of taste research using FP as a proxy for taste pore density. FP density has historically been analyzed using Miller & Reedy’s 1990 characterizations of their morphology: round, stained lighter, large, and elevated. In this work, the authors forewarned that stricter definitions of FP morphology needed to be outlined. Despite this call to action, follow up literature has been scarce, with most studies continuing to cite Miller & Reedy’s original work. Consequently, FP density reports have been highly variable and, combined with small sample sizes, may contribute to the discrepant conclusions on the role of FP in taste sensitivity. The Genetics of Taste Lab explored this apparent inconsistency in counting and found that scorers were individually prioritizing the importance of these characteristics differently and had no guidance for when a papilla had some, but not all, of the reported qualities of FP. The result of this subjectivity is highly variable FP counts of the same tongue image. The Denver Papillae Protocol has been developed to remedy this consequence through use of a dichotomous key that further defines and prioritizes the importance of the characteristics put forth by Miller & Reedy. The proposed method could help create a standard way to quantify FP for researchers in the field of taste and nutritional studies. PMID:26131644

  8. Colorado Regional Faults

    SciTech Connect

    Hussein, Khalid

    2012-02-01

    Citation Information: Originator: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Originator: Colorado Geological Survey (CGS) Publication Date: 2012 Title: Regional Faults Edition: First Publication Information: Publication Place: Earth Science & Observation Center, Cooperative Institute for Research in Environmental Science, University of Colorado, Boulder Publisher: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Description: This layer contains the regional faults of Colorado Spatial Domain: Extent: Top: 4543192.100000 m Left: 144385.020000 m Right: 754585.020000 m Bottom: 4094592.100000 m Contact Information: Contact Organization: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Contact Person: Khalid Hussein Address: CIRES, Ekeley Building Earth Science & Observation Center (ESOC) 216 UCB City: Boulder State: CO Postal Code: 80309-0216 Country: USA Contact Telephone: 303-492-6782 Spatial Reference Information: Coordinate System: Universal Transverse Mercator (UTM) WGS’1984 Zone 13N False Easting: 500000.00000000 False Northing: 0.00000000 Central Meridian: -105.00000000 Scale Factor: 0.99960000 Latitude of Origin: 0.00000000 Linear Unit: Meter Datum: World Geodetic System 1984 (WGS ’984) Prime Meridian: Greenwich Angular Unit: Degree Digital Form: Format Name: Shape file

  9. Colorado Electrical Transmission Grid

    SciTech Connect

    Zehner, Richard E.

    2012-02-01

    Citation Information: Originator: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Originator: Xcel Energy Publication Date: 2012 Title: Colorado XcelEnergy NonXcel Transmission Network Edition: First Publication Information: Publication Place: Earth Science & Observation Center, Cooperative Institute for Research in Environmental Science (CIRES), University of Colorado, Boulder Publisher: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Description: This layer contains transmission network of Colorado Spatial Domain: Extent: Top: 4540689.017558 m Left: 160606.141934 m Right: 758715.946645 m Bottom: 4098910.893397m Contact Information: Contact Organization: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Contact Person: Khalid Hussein Address: CIRES, Ekeley Building Earth Science & Observation Center (ESOC) 216 UCB City: Boulder State: CO Postal Code: 80309-0216 Country: USA Contact Telephone: 303-492-6782 Spatial Reference Information: Coordinate System: Universal Transverse Mercator (UTM) WGS’1984 Zone 13N False Easting: 500000.00000000 False Northing: 0.00000000 Central Meridian: -105.00000000 Scale Factor: 0.99960000 Latitude of Origin: 0.00000000 Linear Unit: Meter Datum: World Geodetic System ’1984 (WGS ’1984) Prime Meridian: Greenwich Angular Unit: Degree Digital Form: Format Name: Shapefile

  10. Aggregate supply and demand modeling using GIS methods for the front range urban corridor, Colorado

    NASA Astrophysics Data System (ADS)

    Karakas, Ahmet; Turner, Keith

    2004-07-01

    The combined use of allocation modeling and geographical information system (GIS) technologies for providing quantitative assessments of aggregate supply and demand is evaluated using representative data for the Front Range Urban Corridor (FRUC) in Colorado. The FRUC extends from the Colorado-Wyoming border to south of Colorado Springs, and includes Denver and the major urban growth regions of Colorado. In this area, aggregate demand is high and is increasing in response to population growth. Neighborhood opposition to the establishment of new pits and quarries and the depletion of many deposits are limiting aggregate supplies. Many sources are already covered by urban development or eliminated from production by zoning. Transport of aggregate by rail from distant resources may be required in the future. Two allocation-modeling procedures are tested in this study. Network analysis procedures provided within the ARC/INFO software, are unsatisfactory. Further aggregate allocation modeling used a model specifically designed for this task; a modified version of an existing Colorado School of Mines allocation model allows for more realistic market analyses. This study evaluated four scenarios. The entire region was evaluated with a scenario reflecting the current market and by a second scenario in which some existing suppliers were closed down and new potential suppliers were activated. The conditions within the Denver metropolitan area were studied before and after the introduction of three possible rail-to-truck aggregate distribution centers. GIS techniques are helpful in developing the required database to describe the Front Range Urban Corridor aggregate market conditions. GIS methods allow the digital representation of the regional road network, and the development of a distance matrix relating all suppliers and purchasers.

  11. Literature of Southeast Asia.

    ERIC Educational Resources Information Center

    Echols, John M.

    This paper provides a brief description of the literature of Southeast Asia. This area, which embraces the region south of China and east of India, includes the modern nations of Burma, Thailand, Cambodia, Laos, Vietnam, The Philippines, Malaysia and Indonesia. The earliest historical influence came from India around the beginnings of the…

  12. Performance Theory: Southeast Asia.

    ERIC Educational Resources Information Center

    Kirby, Michael, Ed.

    1979-01-01

    Focusing on the contemporary theatre in Southeast Asia, this journal issue sheds light on the intercultural relationships that exist between that part of the world and the Western world. In addition to a transcript of a Balinese "topeng" (storytelling) performance, the journal contains eight articles that provide information on the following…

  13. New Confrontations in Southeast Asia.

    ERIC Educational Resources Information Center

    Thien, Ton That

    1978-01-01

    Examines political, social, and economic developments in Southeast Asia under Communist forces which conquered Southeast Asia after the American disengagement. Topics discussed include refugees, Vietnamese who have chosen to live in exile, civil administration in Vietnam, Sino-Soviet relations, and predictions about the future of Southeast Asia.…

  14. Downscaling the IPCC: The 2008 and 2014 Colorado Climate Assessments

    NASA Astrophysics Data System (ADS)

    Averyt, K.; Lukas, J.; Gordon, E.

    2014-12-01

    The last two years have seen the release of the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) and the third US National Climate Assessment (NCA). In addition to these high profile climate assessments, many regional, state, and municipal entities are leveraging the emerging climate science and scaling the process and the data to develop climate assessments relevant to decision making at sub-national scales. One such example is the assessment Climate Change in Colorado: A Synthesis to Support Water Resources Management and Adaptation. The report (released in August 2014) expands and updates an earlier Climate Change in Colorado assessment that was published in October 2008. The 2008 Colorado assessment took a hybrid approach to assessment, marrying the IPCC Working Group I focus on physical science, with the adaptation components raditionally embedded within Working Group II. The Colorado assessment approach included the transparency and open review that underpin the credibility of the IPCC and NCA processes. A modest amount of original research was undertaken, which is a slight deviation from the IPCC and NCA processes. The state-based process also used a co-production model that engages users directly at the outset of the process. The 2008 and 2014 reports used the same process, but the newer assesment is vastly expanded in scope. The efficacy of the process is demonstrated by the use of the Colorado assessments by decision makers. The science in the 2008 report supported the Colorado State Drought Plan, Climate Adaptation Plans for several Colorado Counties, and the State Water Supply Initiative. Components of the 2014 assessment have been used as the science basis for Denver's Climate Adaptation Plan. Decisions that involve climate adaptation tend to happen at sub-regional scales. Consequently, IPCC and NCA documents are not as informative for adaptation planning at regional and state scales as localized assessments. This does not

  15. STS-30 Magellan spacecraft arrives at KSC after six-day journey from Colorado

    NASA Technical Reports Server (NTRS)

    1989-01-01

    The Payload Environmental Transportation System (PETS) (semi-truck and trailer), which transported the Magellan spacecraft on its six-day journey from Martin Marietta in Denver, Colorado, to Kennedy Space Center (KSC), arrives safely at the Space Assembly and Encapsulation Facility 2 (SAEF-2) planetary checkout facility. The spacecraft, destined for unprecedented studies of Venusian topographic features, is to be deployed by the crew of NASA's STS-30 mission in April 1989. View provided by KSC with alternate number KSC-88PC-1082.

  16. Sources and loads of nutrients in the South Platte River, Colorado and Nebraska, 1994-95

    USGS Publications Warehouse

    Litke, D.W.

    1996-01-01

    The South Platte River Basin was one of 20 river basins selected in 1991 for investigation as part of the U.S. Geological Survey's National Water- Quality Assessment (NAWQA) Program. Nationwide, nutrients have been identified as one of the primary nationwide water-quality concerns and are of particular interest in the South Platte River Basin where nutrient concentrations are large compared to concentrations in other NAWQA river basins. This report presents estimates of the magnitude of nutrient-source inputs to the South Platte River Basin, describes nutrient concen- trations and loads in the South Platte River during different seasons, and presents comparisons of nutrient inputs to instream nutrient loads. Annual nutrient inputs to the basin were estimated to be 306,000 tons of nitrogen and 41,000 tons of phosphorus. The principal nutrient sources were wastewater-treatment plants, fertilizer and manure applications, and atmospheric deposition. To characterize nutrient concentrations and loads in the South Platte River during different seasons, five nutrient synoptic samplings were conducted during 1994 and 1995. Upstream from Denver, Colorado, during April 1994 and January 1995, total nitrogen concentrations were less than 2 milligrams per liter (mg/L), and total phosphorus concentrations were less than 0.2 mg/L. The water in the river at this point was derived mostly from forested land in the mountains west of Denver. Total nutrient concentrations increased through the Denver metropolitan area, and concentration peaks occurred just downstream from each of Denver's largest wastewater-treatment plants with maximum concentrations of 13.6 mg/L total nitrogen and 2.4 mg/L total phosphorus. Nutrient concen- concentrations generally decreased downstream from Denver. Upstream from Denver during April 1994 and January 1995, total nitrogen loads were less than 1,000 pounds per day (lb/d), and total phosphorus loads were less than 125 lb/d. Total nutrient loads increased

  17. Alliance for Sustainable Colorado Renovation Raises Its Energy Performance to New Heights, Commercial Building Energy Efficiency (Fact Sheet); Energy Efficiency & Renewable Energy (EERE)

    SciTech Connect

    2015-03-01

    The Alliance for Sustainable Colorado (The Alliance) is a nonprofit organization aiming to transform sustainability from vision to reality. Part of its mission is to change the operating paradigms of commercial building design to make them more sustainable. Toward that end The Alliance uses its headquarters, The Alliance Center at 1536 Wynkoop Street in Denver, as a living laboratory, conductingpilot studies of innovative commercial-building-design solutions for using and generating energy.

  18. Colorado Potential Geothermal Pathways

    SciTech Connect

    Zehner, Richard E.

    2012-02-01

    Citation Information: Originator: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Publication Date: 2012 Title: Colorado PRS Cool Fairways Edition: First Publication Information: Publication Place: Earth Science & Observation Center, Cooperative Institute for Research in Environmental Science (CIRES), University of Colorado, Boulder Publisher: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Description: This layer contains the weakened basement rocks. Isostatic gravity was utilized to identify structural basin areas, characterized by gravity low values reflecting weakened basement rocks. Together interpreted regional fault zones and basin outlines define geothermal "exploration fairways", where the potential exists for deep, superheated fluid flow in the absence of Pliocene or younger volcanic units Spatial Domain: Extent: Top: 4544698.569273 m Left: 144918.141004 m Right: 763728.391299 m Bottom: 4094070.397932 m Contact Information: Contact Organization: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Contact Person: Khalid Hussein Address: CIRES, Ekeley Building Earth Science & Observation Center (ESOC) 216 UCB City: Boulder State: CO Postal Code: 80309-0216 Country: USA Contact Telephone: 303-492-6782 Spatial Reference Information: Coordinate System: Universal Transverse Mercator (UTM) WGS’1984 Zone 13N False Easting: 500000.00000000 False Northing: 0.00000000 Central Meridian: -105.00000000 Scale Factor: 0.99960000 Latitude of Origin: 0.00000000 Linear Unit: Meter Datum: World Geodetic System ’1984 (WGS ’1984) Prime Meridian: Greenwich Angular Unit: Degree Digital Form: Format Name: Shape file

  19. Colorado Better Buildings Project Final Report

    SciTech Connect

    Strife, Susie; Yancey, Lea

    2013-12-30

    The Colorado Better Buildings project intended to bring new and existing energy efficiency model programs to market with regional collaboration and funding partnerships. The goals for Boulder County and its program partners were to advance energy efficiency investments, stimulate economic growth in Colorado and advance the state’s energy independence. Collectively, three counties set out to complete 9,025 energy efficiency upgrades in 2.5 years and they succeeded in doing so. Energy efficiency upgrades have been completed in more than 11,000 homes and businesses in these communities. Boulder County and its partners received a $25 million BetterBuildings grant from the U.S. Department of Energy under the American Recovery and Reinvestment Act in the summer of 2010. This was also known as the Energy Efficiency and Conservation Block Grants program. With this funding, Boulder County, the City and County of Denver, and Garfield County set out to design programs for the residential and commercial sectors to overcome key barriers in the energy upgrade process. Since January 2011, these communities have paired homeowners and business owners with an Energy Advisor – an expert to help move from assessment to upgrade with minimal hassle. Pairing this step-by-step assistance with financing incentives has effectively addressed many key barriers, resulting in energy efficiency improvements and happy customers. An expert energy advisor guides the building owner through every step of the process, coordinating the energy assessment, interpreting results for a customized action plan, providing a list of contractors, and finding and applying for all available rebates and low-interest loans. In addition to the expert advising and financial incentives, the programs also included elements of social marketing, technical assistance, workforce development and contractor trainings, project monitoring and verification, and a cloud-based customer data system to coordinate among field

  20. Child Development in Okinawa Compared with Tokyo and Denver, and the Implications for Developmental Screening.

    ERIC Educational Resources Information Center

    Ueda, Reiko

    1978-01-01

    Developmental differences in the Denver Developmental Screening Test items were demonstrated between samples of children from Okinawa (n=615) and Tokyo (n=1171), who were 16 days to 6 years old. Journal availability: see EC 112 661. (Author)

  1. 75 FR 20394 - American Racing Equipment, LLC, Denver, CO; Notice of Negative Determination on Remand

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-19

    ... Employment and Training Administration American Racing Equipment, LLC, Denver, CO; Notice of Negative..., the Department of Labor (Department) issued a Negative Determination regarding eligibility to apply...) The Department's Notice of negative determination was published in the Federal Register on June...

  2. GardnerDenver compressor, now occupying the former transformer vault to the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Gardner-Denver compressor, now occupying the former transformer vault to the West of the plant switch house - Bureau of Mines Metallurgical Research Laboratory, Original Building, Date Street north of U.S. Highway 93, Boulder City, Clark County, NV

  3. Gas/particle partitioning of n-alkanes, PAHs and oxygenated PAHs in urban Denver

    NASA Astrophysics Data System (ADS)

    Xie, Mingjie; Hannigan, Michael P.; Barsanti, Kelley C.

    2014-10-01

    In this study, a medium volume sampler equipped with quartz fiber filters (QFFs) and a polyurethane foam (PUF)/XAD-4/PUF sandwich (PXP) was used to collect semi-volatile organic compounds (SVOCs) in both gaseous and particle (PM2.5) phases. A backup QFF (bQFF) was used to evaluate possible sampling artifact of particulate organics due to vapor-phase adsorption. A series of n-alkanes (molecular weight: 170-562) and PAHs (128-300), and two oxy-PAHs (acenaphthenone, 168; fluorenone, 180) were measured. Breakthrough experiments demonstrated that the PXP could collect all gas-phase target compounds with high efficiency, even the low molecular weight (MW) species (e.g., naphthalene). Comparing species concentrations across different sampling matrices encountered at the Denver, Colorado field site, the light n-alkanes (MW < 282) and PAHs (MW < 192) were mostly distributed into the gas phase; while those heavy n-alkanes (MW > 324) and PAHs (MW > 202) were primarily in the particle phase (Average temperature, 12.5 ± 10.1 °C). Log values of measured gas/particle (G/P) partitioning coefficients (Kmp,OM) of selected SVOCs (docosane, tricosane, fluoranthene, pyrene, acenaphthenone and fluorenone) were linearly regressed to those of theoretically-based partitioning coefficients (Ktp,OM) for comparison. Prior to Kmp,OM calculation, the gas- and particle-phase concentrations of SVOCs were corrected following two different approaches based on bQFF measurements. The first approach assumed that the bQFF associated SVOCs were from the adsorption of gaseous SVOCs (positive artifact); the second approach assumed equal contributions from positive and negative (organics evaporated from top QFF and adsorbed by bQFF) artifacts. Under both corrections, significant correlations (p < 0.05) were observed between log Kmp,OM and log Ktp,OM for the six selected SVOCs, suggesting that the predicted G/P partitioning can reasonably capture the measured G/P partitioning behavior. The large

  4. Colorado's clean energy choices

    SciTech Connect

    Strawn, N.; Jones, J.

    2000-04-15

    The daily choices made as consumers affect the environment and the economy. Based on the state of today's technology and economics, Colorado consumers can include energy efficiency and renewable energy into many aspects of their lives. These choices include where they obtain electricity, how they use energy at home, and how they transport themselves from one place to another. In addition to outlining how they can use clean energy, Colorado's Clean Energy Choices gives consumers contacts and links to Web sites for where to get more information.

  5. Aircraft Wake Vortex Measurements at Denver International Airport

    NASA Technical Reports Server (NTRS)

    Dougherty, Robert P.; Wang, Frank Y.; Booth, Earl R.; Watts, Michael E.; Fenichel, Neil; D'Errico, Robert E.

    2004-01-01

    Airport capacity is constrained, in part, by spacing requirements associated with the wake vortex hazard. NASA's Wake Vortex Avoidance Project has a goal to establish the feasibility of reducing this spacing while maintaining safety. Passive acoustic phased array sensors, if shown to have operational potential, may aid in this effort by detecting and tracking the vortices. During August/September 2003, NASA and the USDOT sponsored a wake acoustics test at the Denver International Airport. The central instrument of the test was a large microphone phased array. This paper describes the test in general terms and gives an overview of the array hardware. It outlines one of the analysis techniques that is being applied to the data and gives sample results. The technique is able to clearly resolve the wake vortices of landing aircraft and measure their separation, height, and sinking rate. These observations permit an indirect estimate of the vortex circulation. The array also provides visualization of the vortex evolution, including the Crow instability.

  6. Laboratory measurements of electric properties of composite mine dump samples from Colorado and New Mexico

    USGS Publications Warehouse

    Anderson, Anita L.; Campbell, David L.; Beanland, Shay

    2001-01-01

    Individual mine waste samples were collected and combined to form one composite sample at each of eight mine dump sites in Colorado and New Mexico. The samples were air-dried and sieved to determine the geochemical composition of their <2mm size fraction. Splits of the samples were then rehydrated and their electrical properties were measured in the US Geological Survey Petrophysical Laboratory, Denver, Colorado (PetLab). The PetLab measurements were done twice: in 1999, using convenient amounts of rehydration water ranging from 5% to 8%; and in 2000, using carefully controlled rehydrations to 5% and 10% water. This report gives geochemical analyses of the <2mm size fraction of the composite samples (Appendix A), PetLab graphs of the 1999 measurements (Appendix B), Petlab graphs of the 2000 measurements (Appendix C), and Cole-Cole models of the PetLab data from the 2000 measurements (Appendix D).

  7. ECOREGIONS OF COLORADO

    EPA Science Inventory

    The ecoregions of Colorado have been identified, mapped, and described and provide a geographic structure for environmental resources research, assessment, monitoring, and management. This project is part of a larger effort by the U.S. EPA to create a national, hierarchical ecor...

  8. Colorado's Guaranteed Graduate Process.

    ERIC Educational Resources Information Center

    Colorado State Dept. of Education, Denver.

    An overview of the nature, benefits, and steps involved in Colorado's Guaranteed Graduate Program, a process that assures that high school graduates have the knowledge and skills considered essential for entry into employment and postsecondary education, begins this document. A discussion of the portfolio process follows, along with descriptions…

  9. Colorado Children's Budget 2010

    ERIC Educational Resources Information Center

    Colorado Children's Campaign, 2010

    2010-01-01

    The "Children's Budget 2010" is intended to be a resource guide for policymakers and advocates who are interested in better understanding how Colorado funds children's programs and services. It attempts to clarify often confusing budget information and describe where the state's investment trends are and where those trends will lead the state if…

  10. Colorado's Singular "No"

    ERIC Educational Resources Information Center

    Wiedeman, Reeves

    2008-01-01

    Supporters of affirmative action may have finally found a way to defeat state ballot measures that would ban such programs: Latch onto an inspirational presidential candidate with piles of cash and an unprecedented voter-turnout machine. Those activists won a narrow victory in Colorado this month, when 50.7 percent of voters made the state the…

  11. Colorado Children's Budget 2013

    ERIC Educational Resources Information Center

    Buck, Beverly; Baker, Robin

    2013-01-01

    The "Colorado Children's Budget" presents and analyzes investments and spending trends during the past five state fiscal years on services that benefit children. The "Children's Budget" focuses mainly on state investment and spending, with some analysis of federal investments and spending to provide broader context of state…

  12. MIGRATORY LABOR IN COLORADO.

    ERIC Educational Resources Information Center

    DOUGLASS, M.R.; AND OTHERS

    CONDITIONS AND PROBLEMS RELATING TO THE EMPLOYMENT OF SEASONAL FARM WORKERS AND MIGRANTS IN COLORADO ARE PRESENTED. THE FIVE MAJOR SEASONAL FARM LABOR STATE EMPLOYMENT AREAS ARE SURVEYED ACCORDING TO (1) THE ORGANIZATION OF THE SEASONAL FARM LABOR (4) TRENDS IN AGRICULTURAL ACREAGE, PRODUCTION, AND TECHNOLOGICAL CHANGE, (5) COMMUNITY ATTITUDES AND…

  13. Asbestos in Colorado Schools.

    ERIC Educational Resources Information Center

    Baldwin, Cynthia A.

    This study determined, by means of a random sample, how many of Colorado's public schools have asbestos materials and estimated the potential risk of exposure presented by these materials. Forty-one schools were surveyed. Bulk samples of possible asbestos materials were collected and analyzed using the K-squared Asbestos Screening Test to…

  14. Denver Reengineers: By Relying More on Vendors and Technology, Jo Sarling Explains How the Denver Public Library Shifted Resources to the Public

    ERIC Educational Resources Information Center

    Sarling, Jo

    2005-01-01

    This article gives details of the developments and changes in the Denver Public Library (DPL). Through a review of advancements in technology, vendor capabilities, staffing levels and talent, as well as outsourcing opportunities, DPL reinvented its workflow and processing. The result? The once giant stacks of books, CDs, videos, and DVDs waiting…

  15. Geothermal Geodatabase for Wagon Wheel Hot Springs, Mineral County, Colorado

    DOE Data Explorer

    Zehner, Richard

    2012-11-01

    Geothermal Geodatabase for Wagon Wheel Hot Springs, Mineral County, Colorado By Richard “Rick” Zehner Geothermal Development Associates Reno Nevada USA 775.737.7806 rzehner@gdareno.com For Flint Geothermal LLC, Denver Colorado Part of DOE Grant EE0002828 2013 This is an ESRI geodatabase version 10, together with an ESRI MXD file version 10.2 Data is in UTM Zone 13 NAD27 projection North boundary: approximately 4,189,000 South boundary: approximately 4,170,000 West boundary: approximately 330,000 East boundary: approximately 351,000 This geodatabase was built to cover several geothermal targets developed by Flint Geothermal in 2012 during a search for high-temperature systems that could be exploited for electric power development. Several of the thermal springs at Wagon Wheel Gap have geochemistry and geothermometry values indicative of high-temperature systems. The datasets in the geodatabase are a mixture of public domain data as well as data collected by Flint Geothermal, now being made public. It is assumed that the user has internet access, for the mxd file accesses ESRI’s GIS servers. Datasets include: 1. Results of reconnaissance shallow (2 meter) temperature surveys 2. Air photo lineaments 3. Groundwater geochemistry 4. Power lines 5. Georeferenced geologic map of Routt County 6. Various 1:24,000 scale topographic maps

  16. Geothermal Geodatabase for Routt Hot Springs, Routt County, Colorado

    DOE Data Explorer

    Zehner, Richard

    2012-11-01

    Geothermal Geodatabase for Routt Hot Springs, Routt County, Colorado By Richard “Rick” Zehner Geothermal Development Associates Reno Nevada USA 775.737.7806 rzehner@gdareno.com For Flint Geothermal LLC, Denver Colorado Part of DOE Grant EE0002828 2013 This is an ESRI geodatabase version 10, together with an ESRI MXD file version 10.2 Data is in UTM Zone 13 NAD27 projection North boundary: approximately 4,500,000 South boundary: approximately 4,480,000 West boundary: approximately 330,000 East boundary: approximately 358,000 This geodatabase was built to cover several geothermal targets developed by Flint Geothermal in 2012 during a search for high-temperature systems that could be exploited for electric power development. Several of the thermal springs and wells in the Routt Hot Spring and Steamboat Springs areahave geochemistry and geothermometry values indicative of high-temperature systems. The datasets in the geodatabase are a mixture of public domain data as well as data collected by Flint Geothermal, now being made public. It is assumed that the user has internet access, for the mxd file accesses ESRI’s GIS servers. Datasets include: 1. Results of reconnaissance shallow (2 meter) temperature surveys 2. Air photo lineaments 3. Groundwater geochemistry 5. Georeferenced geologic map of Routt County 6. Various 1:24,000 scale topographic maps

  17. Proceedings of the workshop "Development of biological decision support systems for resource managers": Denver, Colorado, October 27-29, 1998

    USGS Publications Warehouse

    Getter, James; D'Erchia, Terry D.; Root, Ralph; Getter, James; D'Erchia, Terry D.; Root, Ralph

    1999-01-01

    The format for this 3-day workshop (27-29 October 1998) included plenary presentations by USGS Biological Resources Division (BRD) and U.S. Fish and Wildlife Service per onnel who u e and develop decision support systems (DSS); breakout ses ions addressing DSS technical information aspect , outreach/ customer requirements, and future perspectives; and a DSS Steering Committee meeting to evaluate work hop goals and to provide guidance for fu ture efforts. Steering committee action item developed from workshop inputs were to ( I) develop a "DSS framework" document for u e in biological research. (2) develop a "proof of concept" DSS based upon the framework document, and (3) integrate decision support ystem into BRD program elements.

  18. Building America Case Study: Meeting DOE Challenge Home Program Certification, Chicago, Illinois; Denver, Colorado; Devens, Massachusetts (Fact Sheet)

    SciTech Connect

    Not Available

    2014-12-01

    The purpose of this project was to evaluate integrated packages of advanced measures in individual test homes to assess their performance with respect to Building America Program goals, specifically compliance with the DOE Challenge Home Program. BSC consulted on the construction of five test houses by three Cold Climate production builders in three separate US cities. BSC worked with the builders to develop a design package tailored to the cost-related impacts for each builder. Therefore, the resulting design packages do vary from builder to builder. BSC provided support through this research project on the design, construction and performance testing of the five test homes. Overall, the builders have concluded that the energy related upgrades (either through the prescriptive or performance path) represent reasonable upgrades. The builders commented that while not every improvement in specification was cost effective (as in a reasonable payback period), many were improvements that could improve the marketability of the homes and serve to attract more energy efficiency discerning prospective homeowners. However, the builders did express reservations on the associated checklists and added certifications. An increase in administrative time was observed with all builders. The checklists and certifications also inherently increase cost due to: 1. Adding services to the scope of work for various trades, such as HERS Rater, HVAC contractor. 2. Increased material costs related to the checklists, especially the EPA Indoor airPLUS and EPA WaterSense Efficient Hot Water Distribution requirement.

  19. Diagnosis and Evaluation of Deaf-Blind Children, Report of Workshop Proceedings (Denver, Colorado, February, 17-18, 1971).

    ERIC Educational Resources Information Center

    Moriarty, Donald F., Ed.; And Others

    The eight major papers from the Workshop on Diagnosis and Evaluation of deaf-blind children focus upon the roles of various professionals who may be involved with deaf-blind children at the diagnostic stage. Topics covered in the role of the pediatrician in diagnosis and evaluation of the deaf-blind child, the role of the ear specialist…

  20. EdMedia 2012: World Conference on Educational Multimedia, Hypermedia and Telecommunications. Proceedings (Denver, Colorado, June 26-29, 2012)

    ERIC Educational Resources Information Center

    Amiel, Tel, Ed.; Wilson, Brent, Ed.

    2012-01-01

    The Association for the Advancement of Computing in Education (AACE) is an international, non-profit educational organization. The Association's purpose is to advance the knowledge, theory, and quality of teaching and learning at all levels with information technology. "EdMedia 2012: World Conference on Educational Multimedia, Hypermedia and…

  1. Conference Abstracts and Resources. The American Occupational Therapy Association's Annual Conference and Exposition (Denver, Colorado, April 8-12, 1995).

    ERIC Educational Resources Information Center

    American Occupational Therapy Association, Rockville, MD.

    These abstracts of conference presentations are intended to serve as a record and reference of current clinical practice, program planning, and research ideas and results in the field of occupational therapy. Abstracts are grouped in the following categories: (1) preconference institutes; (2) general interest; (3) administration/management; (4)…

  2. Annual NASSGP/NCHELP Research Network Conference Proceedings (5th, Denver, Colorado, May 25-27, 1988).

    ERIC Educational Resources Information Center

    Webster, Jeff, Ed.

    This volume presents papers from a 1988 conference on collegiate student financial aid which focused on trends in the cost of higher education, student loan defaults, trends in borrowing, the impact of congressional legislation, and state-level financial aid research. The papers are grouped in five sections corresponding to the five topics, and…

  3. College Scholarship Service Colloquium on Student Loan Counseling & Debt Management. Proceedings (Denver, Colorado, December 2-4, 1985).

    ERIC Educational Resources Information Center

    College Entrance Examination Board, New York, NY. Coll. Scholarship Service.

    Student loan counseling and debt management are discussed in three papers, six commentaries, and a panel discussion from a College Scholarship Service colloquium. In "Fulfilling the Institution's Responsibilities to Student Borrowers," Theodore J. Marchese discusses a shift in student financial aid marked by the ascendency of loans instead of…

  4. Health hazard evaluation report HETA 83-341-1557, Bureau of Reclamation, US Department of the Interior, Denver, Colorado

    SciTech Connect

    Moseley, C.L.; Anderson, K.

    1985-01-01

    Breathing zone samples were analyzed for the pesticides 2,4-D (94757), Banvel (1918009), Buctril (1689845), and Roundup (28641940) at field stations of the Bureau of Reclamation (Bureau) (SIC-9511), US Department of the Interior at Fresno, Tracy, and Red Bluff, California and Bismarck, North Dakota in August, 1983 and June, 1984. The survey was requested by the Bureau to evaluate its pesticide application program. Work practices were observed during mixing, spraying, and cleanup operations. Observation of work practices indicated that Bureau employees had a good understanding of the hazards associated with pesticides. Recommendations include employee education, using protective clothing during mixing, and implementing programs of exposure recordkeeping.

  5. Proceedings of the First membership conference of the National Water Data Exchange, May 9-11, 1978, Denver, Colorado

    USGS Publications Warehouse

    Myers, Beverly M.; Nokes, Janet M.

    1979-01-01

    This report contains the proceedings of the first membership conference of the National Water Data Exchange (NAWDEX). The purpose of the conference was to acquaint participants in the NAWDEX program with the systems, data resources, and services available throughout the membership, to establish improved personal relationships within the membership, and to serve as a forum for the exchange of ideas and expertise on matters relating to improving the operation of NAWDEX and identifying the needs of the water-data community. Sixteen papers were presented at the conference which describe data systems of member organizations, needs of the data community, and programs of national interest. These papers are published in their entirety in this proceedings volume. Four working panels were also conducted dealing with (1) Program Administration, Management, and Coordination; (2) Recommended Standards for the Handling and Exchange of Water Data; (3) Water Data Indexing and Technical Systems Development; and (4) Request, Response and Service Activities. The reports and conclusions of these panels are included also. (Woodard-USGS)

  6. Structure, outcrop, and subcrop of the bedrock aquifers along the western margin of the Denver Basin, Colorado

    USGS Publications Warehouse

    Robson, Stanley G.; Van Slyke, George D.; Graham, Glenn

    1998-01-01

    Severe and prolonged droughts between 1961 and 1988, combined with increased demands for freshwater supplies in the United States, have resulted in a critical need to assess the potential for development of ground- and surface-water supplies. Rapid industrial growth and urban expansion have caused existing freshwater supplies to be used at or near maximum capacity. Begun in 1978, the Regional Aquifer-System Analysis (RASA) Program of the U.S. Geological Survey (USGS) is a systematic effort to study a number of the Nation's most important aquifer systems, which, in aggregate, underlie much of the country and represent an important component of the Nation's total water supply. The broad objective for each of the 28 studies in the program is to assemble geologic, hydrologic, and geochemical information, to analyze and develop an understanding of the system, and to develop predictive capabilities that will contribute to the effective management of the system.In 1988, as part of the RASA Program, the USGS began a 6-year study of the ground-water resources of parts of 11 States in the Eastern United States (Swain and others, 1991). The study was designated the Appalachian Valley and Piedmont Regional Aquifer-System Analysis (APRASA). The APRASA team investigated ground-water resources primarily in the unglaciated part of the Valley and Ridge, the Blue Ridge, the New England, and the Piedmont Physiographic Provinces (fig. 1). For the purposes of this report, the small area in the New England Physiographic Province that is within the study area in New Jersey and Pennsylvania was considered part of the Piedmont Physiographic Province. The results of the APRASA are contained in about 50 reports and abstracts, including reports on simulation of ground-water flow in three type areas, this atlas, and chapters in Professional Paper 1422. These chapters include the summary (Chapter A), descriptions of recharge rates and surface- and ground-water relations (Chapter B), hydrogeologic terranes in the Valley and Ridge Physiographic Province (Chapter C), and ground-water geochemistry (Chapter D).The purposes of this atlas are to summarize the hydrogeology, to describe an analysis of maps and well records, and to present a classification and map of the hydrogeologic terranes of the Blue Ridge and Piedmont Physiographic Provinces within the APRASA study area. Hydrogeologic terranes are defined for this atlas as regionally mappable areas characterized by similar water-yielding properties of a grouping of selected rock types. The hydrogeologic terranes represent areas of distinct hydrologic character. The terranes are intended to help water users locate and develop adequate water supplies and to help hydrologists interpret the regional hydrogeology.Previous investigations provide maps and descriptions of the geologic units, describe the local quantity and quality of ground water within these units, and establish the statistical methods for comparing the water-yielding propertics of these units. State geologic maps show the distribution of geologic units at a scale of 1:500,000 for Alabama (Osborne and others, 1989), Georgia (Lawton and others, 1976), North Carolina (Brown and Parker, 1985), and Virginia (Calver and Hobbs, 1963). State maps show geologic units at a scale of 1:250,000 for Maryland (Cleaves and others, 1968), New Jersey (Lewis and Kummel, 1912), Pennsylvania (Berg and others, 1980), South Carolina (Overstreet and Bell, 1965), Tennessee (Hardeman, 1966), and West Virginia (Cardwell and others, 1968). Quadrangle geologic maps show geologic units at a scale of 1:24,000 for parts of Delaware within the APRASA area (Woodruff and Thompson, 1972, 1975). Many reports have been published describing the groundwater resources of a county, parts of a county, multi-county areas, or river basins.The statistical methods used in this atlas are based largely on those used by Helsel and Hirsch (1992) and by Knopman (1990, p. 7-9). In her analysis of well records in the USGS Ground-Water Site Inventory (GWSI) data base, Knopman (1990) ranked factors that must be taken into account when assessing the water-yielding potential of the rocks in the Valley and Ridge, the Blue Ridge, and the Piedmont Physiographic Provinces in Pennsylvania. Readers are referred to Helsel and Hirsch (1992) and Knopman (1990) for details regarding statistical methods.

  7. Higher Education and Economic Development in the West. Report of a Regional Conference (Denver, Colorado, March 19-21, 1980).

    ERIC Educational Resources Information Center

    Western Interstate Commission for Higher Education, Boulder, CO.

    Proceedings of a 1980 conference on economic development in the West and the contribution of higher education in dealing with economic development issues are presented. The West as a region is considered in relation to land and population, urban growth, energy impact, and the states' role. Higher education can help in the areas of manpower,…

  8. Dental Hygiene Education Workshop: Proceedings of Workshop on Dental Hygiene Education (Denver, Colorado, July 22-23, 1984).

    ERIC Educational Resources Information Center

    American Dental Hygienists' Association, Chicago, IL.

    Proceedings from the first in a yearly series of conferences on dental hygiene education sponsored by the American Dental Hygienists' Association are presented. Three sessions are as follows: (1) "Society at Large: Economics, Cultural Trends, Work Trends, Demographics, and Technology" (Felix Kaufmann); (2) "The Health Care System: Changes and…

  9. ROOF, Taken looking southeast from the southeast corner of the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    ROOF, Taken looking southeast from the southeast corner of the stair tower roof, showing external piping and west facade of Penthouse 201P. The large stack is seen behind the Penthouse - Department of Energy, Mound Facility, Hydrolysis House Building (HH Building), One Mound Road, Miamisburg, Montgomery County, OH

  10. VIEW LOOKING SOUTHEAST. THE SOUTHEAST CORNER OF SETTLING RESERVOIR NO. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW LOOKING SOUTHEAST. THE SOUTHEAST CORNER OF SETTLING RESERVOIR NO. 3 IS AT THE FAR LEFT. THE CONCRETE COLUMNS WERE ADDED CIRCA 1944 AND SUPPORTED SPRAY EQUIPMENT. SETTLING RESERVOIR NO. 2 (MODIFIED TO ACCOMODATE FLOCCULATION EQUIPMENT) IS AT THE FAR RIGHT. - Yuma Main Street Water Treatment Plant, Jones Street at foot of Main Street, Yuma, Yuma County, AZ

  11. Geology and hydrology of the deep bedrock aquifers in eastern Colorado

    USGS Publications Warehouse

    Robson, S.G.; Banta, E.R.

    1987-01-01

    Deep bedrock aquifers are present in rocks of Cretaceous through Pennsylvanian age in eastern Colorado. These aquifers are the Laramie-Fox Hills (the uppermost aquifer studied), Fort Hays-Codell, Dakota-Cheyenne, Entrada-Dockum, Lyons, and Fountain. Structural mapping indicates the aquifers are 2,000 to 9,000 ft below land surface in most of eastern Colorado but outcrop in local areas in a narrow band along the Front Range of the Rocky Mountains. Recharge primarily occurs in outcrops and produces a northerly or easterly groundwater flow to discharge areas along the South Platte or Arkansas Rivers. Deep aquifers also discharge by underflow to Kansas and Nebraska. Some water-yielding strata in the Dakota-Cheyenne aquifer are not in hydraulic connection with the aquifer, and abnormal fluid pressures, trapped hydrocarbons, and high dissolved-solids concentrations are found in these strata. Temperature and dissolved-solids mapping indicate water temperatures of 100 to 210 in northeastern Colorado and a zone of relatively fresh water extending through a 7,000 sq mi area of the Dakota-Cheyenne aquifer in southeastern Colorado. Water levels in the Laramie-Fox Hills aquifer continue to decline as much as 12 ft/yr in local areas near Denver. (USGS)

  12. Comparing the temporal colonization and microbial diversity of showerhead biofilms in Hawai'i and Colorado.

    PubMed

    Abe, Jonathan; Alop-Mabuti, Aleena; Burger, Peyton; Button, Jackson; Ellsberry, Madeline; Hitzeman, Jaycinth; Morgenstern, David; Nunies, Kasey; Strother, Mara; Darling-Munson, Jared; Chan, Yvonne L; Cassady, Robert; Vasconcellos, Sarah Maile K; Iseman, Michael D; Chan, Edward D; Honda, Jennifer R

    2016-02-01

    The household is a potential source of opportunistic pathogens to humans, a particularly critical issue for immunodeficient individuals. An important human-microbe interface is the biofilm that develops on showerhead surfaces. Once microbe-laden biofilms become aerosolized, they can potentially be inhaled into the lungs. Understanding how quickly a new showerhead becomes colonized would provide useful information to minimize exposure to potentially pathogenic environmental microbes. High school scientists sampled the inner surfaces of pre-existing and newly fitted showerheads monthly over a nine-month period and applied standard microbiologic culture techniques to qualitatively assess microbial growth. Water chemistry was also monitored using commercial test strips. Sampling was performed in households on Oahu, Hawai'i and Denver, Colorado, representing warm/humid and cold/arid environments, respectively. Pre-existing showerheads in Hawai'i showed more diverse microbial growth and significantly greater microbial numbers than a comparable showerhead from Colorado. New, chrome-plated or plastic showerheads in Hawai'i showed diverse and abundant growth one month after installment compared to new showerheads from Colorado. The pH, total chlorine and water hardness levels varied significantly between the Hawai'i and Colorado samples. Enthusiastic student and teacher participation allowed us to answer long-standing questions regarding the temporal colonization of microbial biofilms on pre-existing and new showerhead surfaces. PMID:26764424

  13. Comparing the temporal colonization and microbial diversity of showerhead biofilms in Hawai'i and Colorado.

    PubMed

    Abe, Jonathan; Alop-Mabuti, Aleena; Burger, Peyton; Button, Jackson; Ellsberry, Madeline; Hitzeman, Jaycinth; Morgenstern, David; Nunies, Kasey; Strother, Mara; Darling-Munson, Jared; Chan, Yvonne L; Cassady, Robert; Vasconcellos, Sarah Maile K; Iseman, Michael D; Chan, Edward D; Honda, Jennifer R

    2016-02-01

    The household is a potential source of opportunistic pathogens to humans, a particularly critical issue for immunodeficient individuals. An important human-microbe interface is the biofilm that develops on showerhead surfaces. Once microbe-laden biofilms become aerosolized, they can potentially be inhaled into the lungs. Understanding how quickly a new showerhead becomes colonized would provide useful information to minimize exposure to potentially pathogenic environmental microbes. High school scientists sampled the inner surfaces of pre-existing and newly fitted showerheads monthly over a nine-month period and applied standard microbiologic culture techniques to qualitatively assess microbial growth. Water chemistry was also monitored using commercial test strips. Sampling was performed in households on Oahu, Hawai'i and Denver, Colorado, representing warm/humid and cold/arid environments, respectively. Pre-existing showerheads in Hawai'i showed more diverse microbial growth and significantly greater microbial numbers than a comparable showerhead from Colorado. New, chrome-plated or plastic showerheads in Hawai'i showed diverse and abundant growth one month after installment compared to new showerheads from Colorado. The pH, total chlorine and water hardness levels varied significantly between the Hawai'i and Colorado samples. Enthusiastic student and teacher participation allowed us to answer long-standing questions regarding the temporal colonization of microbial biofilms on pre-existing and new showerhead surfaces.

  14. Silverton folio, Colorado

    USGS Publications Warehouse

    Cross, Whitman; Howe, Ernest; Ransome, F. L.

    1905-01-01

    The term San Juan region, or simply "the San Juan," used with variable meaning by early explorers, and naturally with indefinite limitation during the period of settlement, is now quite generally applied to a large tract of mountainous country in southwestern Colorado, together with an undefined zone of lower country bordering it on the north, west, and south.  The Continental Divide traverses this area in a great bow.  The principal part of the district is a deeply scored volcanic plateau, more than 3000 square miles in extent, drained on the north by the tributaties of the Gunnison River, on the west by those of the Dolores and San Miguel rivers, on the south by numerous branches of the San Juan, and on the east by the Rio Grande.  ALl but the latter drainage finds its way to the Gulf of California through the Colorado River.

  15. Paleoflood investigations for Cherry Creek Basin, Eastern Colorado

    USGS Publications Warehouse

    Jarrett, R.D.

    2004-01-01

    In 1950 when Cherry Creek dam, which is located in Denver. Colorado, was completed, the design flood was 5,126 m3/s. Two recent probable maximum flood (PMF) estimates for the dam range from 14,840 to 18,750 m 3/s demonstrate the uncertainty in estimating extreme flooding in eastern Colorado. PMF difference is due in part to a lack of extreme rainfall and flood data in eastern Colorado. A paleoflood study was conducted to assist dam-safety officials in assessing the risk of large floods in Cherry Creek basin. An envelope curve encompassing maximum contemporary floods (19 sites) and paleofloods (99 sites) was developed for Cherry Creek basin streams; paleoflood data reflect maximum flooding during the last few hundred to many thousands of years. Maximum paleofloods in Cherry Creek range from about 1,050 m 3/s near Franktown (in about 5,000 to at least 10,000 years), about 2,100 m3/s near Melvin (in about 1,500 to 5,000 years), and about 2,270 m3/s at Cherry Creek Reservoir (also in about 1,500 to 5,000 years). Flood-frequency relations for Cherry Creek, which incorporate paleoflood data, indicate the 10,000-year flood (10-4 annual exceedence probability) ranges from about 1,200 m3/s (near Franktown) to about 2,200 m3/s (near Melvin). PMF estimates are about six to eight times larger than paleofloods in Cherry Creek basin. Additional research in flood hydrometeorology is needed to help dam safety officials evaluate potential safety problems related to large floods in Cherry Creek basin. Copyright ASCE 2004.

  16. Estimated Withdrawals and Use of Water in Colorado, 2005

    USGS Publications Warehouse

    Ivahnenko, Tamara; Flynn, Jennifer L.

    2010-01-01

    water); and thermoelectric, 123.21 Mgal/d. The counties with the largest total withdrawals (greater than 500 Mgal/d) were Mesa, Weld, Rio Grande, Montrose, Gunnison, and Saguache. Counties with the smallest total withdrawals (less than 5 Mgal/d) were Clear Creek, Gilpin, and San Juan. Four-digit hydrologic unit codes with the greatest withdrawals were 1019 (South Platte River Basin), 1301 (Rio Grande Basin), and 1102 (Arkansas River Basin); the high withdrawal rates were driven by crop irrigation withdrawals. Total instream water use for hydroelectric power generation was 5,253.60 Mgal/d. Groundwater withdrawals were estimated for 2004 for the bedrock and overlying alluvial aquifers in the Denver Basin for irrigation, public supply, commercial/industrial, household use only, and domestic/livestock water-use categories. Withdrawals were estimated for input into the USGS Denver Basin model by using the equations in the Senate Bill 96-074 groundwater model. The greatest withdrawals were for public supply. The smallest withdrawals were for household-use-only wells. Douglas County had the greatest groundwater withdrawals (183.98 Mgal/d), whereas Broomfield County had the smallest (3.09 Mgal/d). Of the seven Denver Basin aquifers, the Lower Arapahoe aquifer had the greatest total estimated withdrawals (287.11 Mgal/d), with Douglas County having the greatest public-supply withdrawal of any county (95.29 Mgal/d) from this aquifer. The Upper Dawson aquifer was the least used of the Denver Basin aquifers, based on estimated withdrawals of 17.64 Mgal/d. As part of the Colorado Statewide Water Supply Initiative (SWSI), forecasts of future water demand were made based on information such as population, climate, and then-current (2000) water-use information and did not include the effects of future water conservation. Categories compared between estimates in the SWSI baseline forecasted water demand and the USGS water-use compilation were limited to county population and w

  17. Colorado Geothermal Commercialization Program

    SciTech Connect

    Healy, F.C.

    1980-04-01

    Chaffee County, located in central Colorado, has immense potential for geothermal development. This report has been prepared to assist residents and developers in and outside the area to develop the hydrothermal resources of the county. Data has been collected and interpreted from numerous sources in order to introduce a general description of the area, estimate energy requirements, describe the resources and postulate a development plan. Electric power generation and direct heat application potential for the region are described.

  18. Workforce Brief: Colorado

    ERIC Educational Resources Information Center

    Western Interstate Commission for Higher Education, 2006

    2006-01-01

    Employment in Colorado (including hourly and salaried jobs and self-employment) is projected to grow by 23 percent from 2002 to 2012, adding some 551,630 new jobs to the state's economy and growing the workforce from 2,355,290 to 2,906,920. The rate of growth is much higher than the 15 percent increase projected for the nation as a whole.…

  19. Southeast Asian Refugee Parent Survey.

    ERIC Educational Resources Information Center

    Blakely, Mary M.

    This paper summarizes the findings of a descriptive research project conducted among Southeast Asian parents in an Oregon school district, and discusses the issue of fieldwork methodology among refugee populations. The district studied had a student population of 18,000 (kindergarten through grade 12), with Southeast Asian refugees accounting for…

  20. The 2014 Greeley, Colorado Earthquakes: Science, Industry, Regulation, and Media

    NASA Astrophysics Data System (ADS)

    Yeck, W. L.; Sheehan, A. F.; Weingarten, M.; Nakai, J.; Ge, S.

    2014-12-01

    On June 1, 2014 (UTC) a magnitude 3.2 earthquake occurred east of the town of Greeley, Colorado. The earthquake was widely felt, with reports from Boulder and Golden, over 60 miles away from the epicenter. The location of the earthquake in a region long considered aseismic but now the locus of active oil and gas production prompted the question of whether this was a natural or induced earthquake. Several classic induced seismicity cases hail from Colorado, including the Rocky Mountain Arsenal earthquakes in the 1960s and the Paradox Valley earthquakes in western Colorado. In both cases the earthquakes were linked to wastewater injection. The Greeley earthquake epicenter was close to a Class II well that had been injecting waste fluid into the deepest sedimentary formation of the Denver Basin at rates as high as 350,000 barrels/month for less than a year. The closest seismometers to the June 1 event were more than 100 km away, necessitating deployment of a local seismic network for detailed study. IRIS provided six seismometers to the University of Colorado which were deployed starting within 3 days of the mainshock. Telemetry at one site allowed for real time monitoring of the ongoing seismic sequence. Local media interest was extremely high with speculation that the earthquake was linked to the oil and gas industry. The timetable of media demand for information provided some challenges given the time needed for data collection and analysis. We adopted a policy of open data and open communication with all interested parties, and made proactive attempts to provide information to industry and regulators. After 3 weeks of data collection and analysis, the proximity and timing of the mainshock and aftershocks to the C4A injection well, along with a sharp increase in seismicity culminating in an M 2.6 aftershock, led to a decision by the Colorado Oil and Gas Corporation Commission (COGCC) to recommend a temporary halt to injection at the C4A injection well. This was the

  1. Field guide to the continental Cretaceous-Tertiary boundary in the Raton basin, Colorado and New Mexico

    USGS Publications Warehouse

    Pillmore, C.L.; Nichols, D.J.; ,

    1999-01-01

    This guide consists of three general sections: an introduction that includes discussions of Raton basin stratigraphy and the Cretaceous Tertiary (K-T) boundary; descriptions of the geology along the route from Denver, Colorado, to Raton, New Mexico; and descriptions of several K-T sites in the Raton basin. Much of the information is from previous articles and field guides by the authors together with R. M. Flores and from road logs co-authored with Glenn R. Scott, both of the U.S.Geological Survey.

  2. Colorado Preschool Program: 2003 Report to the Colorado Legislature.

    ERIC Educational Resources Information Center

    Colorado State Dept. of Education, Denver.

    The Colorado Preschool Program (CPP) serves at-risk preschool children in community programs, including Head Start programs, private for-profit programs, non-profit programs, and programs within public schools. This report to the Colorado legislature provides information on participation in the program, collaborations of CPP with other early…

  3. Annual Report upon the geographical explorations and surveys west of the one hundredth meridian, in California, Nevada, Utah, Arizona, Colorado, New Mexico, Wyoming, and Montana: Being Appendix FF of the Annual Report of the Chief of Engineers for 1874

    USGS Publications Warehouse

    Wheeler, George Montague

    1874-01-01

    I [G.M. Wheeler] have the honor to submit the following annual report upon geographical explorations and surveys west of the one hundredth meridian, in California, Nevada, Utah, Arizona, Colorado, New Mexico, Wyoming, and Montana for the fiscal year ending June 30, 1874. Toward the close of the last fiscal year, the expedition of 1873 had taken the field in three separate divisions from Salt Lake City, Utah, Denver, Col., and Santa Fé, N. Mex.

  4. Status of shallow-aquifer mapping in the Northern Front Range Area, Colorado

    USGS Publications Warehouse

    Robson, Stanley G.

    2001-01-01

    Mapping of shallow aquifers in the northern Front Range area of Colorado has been completed as part of the U.S. Geological Survey Front Range Infrastructure Resources Project. The aquifer mapping was undertaken as part of a comprehensive effort to better define the mineral, energy, cartographic, biological, and water resources that are critical to the support and development of the area's infrastructure, such as streets. highways, airports, and buildings. The aquifer mapping was undertaken in cooperation with the Colorado Division of Water Resources and the Colorado Water Conservation Board. The shallow aquifers have been mapped in a 2,450-square-mile area extending as an approximately 30-mile-wide band from north of Fort Collins to the Arapahoe-Douglas County line south of Denver (fig. I). The shallow aquifer mapping in the Denver metropolitan area was published in 1996 as Hydrologic Investigations Atlas HA-736 (Robson. 1996). Shallow aquifer mapping in the Greeley-Nunn area was published as HA-746A (Robson, Arnold, and Heiny, 2000a); mapping in the Fort Collins-Loveland area was published as HA-746B (Robson, Arnold, and Heiny, 2000b); mapping in the Fort Lupton-Gilcrest area was published as HA-746C (Robson, Heiny, and Arnold, 2000c); and mapping in the Boulder-Longmont area was published as HA-746D (Robson, Heiny, and Arnold, 2000d). Each of the five atlases contains five map sheets at 1:50,000 scale showing: 1. The thickness and extent of the unconsolidated sediments (loose gravel. sand. silt, and clay) that overlie the bedrock formations in the area (fig. 2). 2. The altitude and configuration of the bedrock surface. 3. The altitude of the water table and direction of ground-water movement. 4. The saturated thickness of the shallow aquifers. 5. The depth to the water table in the shallow aquifers.

  5. Strategic Pay Reform: A Student Outcomes-Based Evaluation of Denver's ProComp Teacher Pay Initiative

    ERIC Educational Resources Information Center

    Goldhaber, Dan; Walch, Joe

    2012-01-01

    Denver Public Schools utilizes one of the nation's highest profile alternative teacher compensation systems, and a key element of Denver's Professional Compensation System for Teachers (ProComp) is pay for performance. This study analyzes the student achievement implications of ProComp utilizing matched student- and teacher-level data from 2003 to…

  6. Colorado Model Content Standards: Science

    ERIC Educational Resources Information Center

    Colorado Department of Education, 2007

    2007-01-01

    The Colorado Model Content Standards for Science specify what all students should know and be able to do in science as a result of their school studies. Specific expectations are given for students completing grades K-2, 3-5, 6-8, and 9-12. Five standards outline the essential level of science knowledge and skills needed by Colorado citizens to…

  7. Colorado Local History: A Directory.

    ERIC Educational Resources Information Center

    Joy, Carol M., Comp.; Mood, Terry Ann, Comp.

    This directory lists by county 135 collections of local history to be found in libraries, museums, historical societies, schools, colleges, and private collections in Colorado. The directory includes only collections available in Colorado which contain bibliographic holdings such as books, newspaper files or clippings, letters, manuscripts,…

  8. 50. SOUTHEAST TO SOUTHEAST CORNER OF WELLSERVICE SHED ADDITION ON ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    50. SOUTHEAST TO SOUTHEAST CORNER OF WELL-SERVICE SHED ADDITION ON REAR OF FACTORY BUILDING. HANGING FROM AND LEANING AGAINST THE WALL ARE TOOLS USED IN WATER WELL SERVICE, SUCH AS BAILER, CHAINS, WRENCHES, PULLEYS, ROPE, SAFETY BELT, CHAIN TONGS, AND LEATHER SEALS FOR PISTON DISPLACEMENT PUMPS. CLEARLY VISIBLE ON RAFTERS IS HISTORIC ELECTRICAL WIRING. - Kregel Windmill Company Factory, 1416 Central Avenue, Nebraska City, Otoe County, NE

  9. WILSON MOUNTAINS WILDERNESS, COLORADO.

    USGS Publications Warehouse

    Bromfield, Calvin S.; Williams, Frank E.

    1984-01-01

    The Wilson Mountains Wilderness consists of about 68 sq mi in the San Miguel Mountains in southwestern Colorado. Based on a mineral survey two areas in the wilderness have a probable mineral-resource potential. One area is on the east margin of the area in the Trout Lake mining district, and the other is near the center of the area, the Mount Wilson mining district. Both areas have had a modest base and (or) precious metal production from narrow veins and have a probable potential for the occurrence of similar deposits. Of more significance is a probable mineral-resource potential for disseminated copper mineralization in the Mount Wilson mining district.

  10. EAGLES NEST WILDERNESS, COLORADO.

    USGS Publications Warehouse

    Tweto, Ogden; Williams, Frank E.

    1984-01-01

    On the basis of a geologic and mineral survey, a primitive area that constitutes the nucleus of the Eagles Nest Wilderness, Colorado was appraised to offer little promise for the occurrence of mineral or energy resources. Among the additional areas later incorporated in the wilderness, only a strip near a major fault west and northwest of Frisco and Dillon is classed as having probable mineral-resource potential. If mineral deposits exist, they probably are of the silver-lead-zinc or fluorspar types.

  11. RAWAH WILDERNESS, COLORADO.

    USGS Publications Warehouse

    Pearson, R.C.; Patten, L.L.

    1984-01-01

    The Rawah Wilderness, Colorado and some adjacent lands were studied and their mineral-resource potential was assessed using geologic, geochemical, and geophysical data. Traces of copper, silver, uranium, tungsten, and molybdenum were found in geochemical samples, but there is little promise for the occurrence of mineral resources in this relatively unmineralized area. If our interpretation is valid that the southern Medicine Bow Mountains moved eastward along a gently west dipping thrust fault, it suggests the possibility that potential petroleum reservoir rocks are beneath the granite in at least parts of the area. This possibility could be investigated by seismic surveys or drilling.

  12. Coordination: Southeast continental shelf studies

    SciTech Connect

    Menzel, D.W.

    1989-01-26

    The objective of this investigation is to obtain model descriptions of the flow modifications in the Southeast Atlantic continental shelf due to Gulf Stream fluctuations and topographic effects. 2 refs., 4 figs.

  13. Flying Low over Southeast Greenland

    NASA Video Gallery

    Few of us ever get to see Greenland's glaciers from 500 meters above the ice. But in this video — recorded on April 9,2013 in southeast Greenland using a cockpit camera installed and operated by ...

  14. Soil Water Cycling Links to Carbon Content between Ecosystems in the Colorado Front Range

    NASA Astrophysics Data System (ADS)

    Powell, K. M.; Anderson, D. E.; Stannard, D. I.; Mladinich, C. S.; Thienelt, T. S.; Blanken, P.

    2011-12-01

    Near surface soil-water content is crucial to the sustainability of an ecosystem. Additionally, the feedbacks between soil water and soil carbon improve the ability to predict carbon sequestration rates. Organic-carbon content in surface soils influences soil texture and, subsequently, water holding capacity. Preliminary research for two growing seasons (2010 and 2011) compares soil water, temperature, heat flux, and evapotranspiration (ET) with soil organic carbon content at several sites in the Colorado Front Range. Continuous measurements of precipitation, soil moisture and temperature, and energy fluxes were conducted from eddy covariance flux towers at three sites around metropolitan Denver: one urban site and two adjacent sites, a montane forest (Flying J Ranch Open Space), and a native tallgrass prairie (Rocky Flats National Wildlife Refuge (NWR)). Irrigation data were obtained for the Denver urban site and added to its precipitation to obtain total water inputs. Soil samples (0-5cm) were collected at each tower site and analyzed for bulk density, volumetric water content, and organic carbon content. Soil water inputs and losses (as ET) were analyzed for each site and compared to soil organic carbon content. Rocky Flats NWR soils contained the highest organic carbon content (20-30 percent), while the urban site and Flying J Ranch soils contained between 10-15 percent. Comparing grassland sites, the urban soil received 5 times higher water input (600mm, more than half from irrigation) in 2010 than those of Rocky Flats. Despite less water input, the Rocky Flats site developed more soil organic carbon, possibly due to large amounts of grassland biomass mineralization and moderate soil moisture conditions through the season. The Denver urban site demonstrated less soil moisture variability in response to surface-water inputs from precipitation compared to soils at the native grassland and montane sites, perhaps limiting the conditions under which soil carbon

  15. HIV in Southeast Asia.

    PubMed

    Abrams, S

    1998-01-01

    This article explores the HIV/AIDS epidemic in Southeast Asia. Prostitution and injecting drug use are two major factors in the appearance of HIV/AIDS in a country. But, it is the correct social network that assures its transmission to epidemic proportions. Heterosexual transmission in Cambodia, Myanmar, and Thailand is linked with prevalence among female sex workers and their clients. In Malaysia, the Ministry of Health responded immediately, but the number of new infections continued to increase. The failures suggest the need for more effective, intensive health education programs, outreach by nongovernmental organizations, and peer education at the grassroots level and in remote areas. Public health officials need to promote political change. International agencies could play an important role, if countries such as Myanmar, Cambodia, and Viet Nam were open to international exchanges. In Myanmar, political unrest has a priority over the need for aggressive health interventions. In Indonesia, the Islamic influence prevents recognition of the country's significant sex industry or the existence of a homosexual community. In Cambodia, health officials warned about the high number of sexual partners, high mobility rate, and low condom use, but HIV spread rapidly in the 1990s. Thailand initiated a 100% condom campaign to combat HIV prevalence in the 1990s, and HIV prevalence declined among sex workers and military recruits. Risk factors for rapid transmission include mobility, the number of sexual partners/sex worker, the proportion engaging in commercial sex, and the rate of regular condom use among sex workers. PMID:12294443

  16. HIV in Southeast Asia.

    PubMed

    Abrams, S

    1998-01-01

    This article explores the HIV/AIDS epidemic in Southeast Asia. Prostitution and injecting drug use are two major factors in the appearance of HIV/AIDS in a country. But, it is the correct social network that assures its transmission to epidemic proportions. Heterosexual transmission in Cambodia, Myanmar, and Thailand is linked with prevalence among female sex workers and their clients. In Malaysia, the Ministry of Health responded immediately, but the number of new infections continued to increase. The failures suggest the need for more effective, intensive health education programs, outreach by nongovernmental organizations, and peer education at the grassroots level and in remote areas. Public health officials need to promote political change. International agencies could play an important role, if countries such as Myanmar, Cambodia, and Viet Nam were open to international exchanges. In Myanmar, political unrest has a priority over the need for aggressive health interventions. In Indonesia, the Islamic influence prevents recognition of the country's significant sex industry or the existence of a homosexual community. In Cambodia, health officials warned about the high number of sexual partners, high mobility rate, and low condom use, but HIV spread rapidly in the 1990s. Thailand initiated a 100% condom campaign to combat HIV prevalence in the 1990s, and HIV prevalence declined among sex workers and military recruits. Risk factors for rapid transmission include mobility, the number of sexual partners/sex worker, the proportion engaging in commercial sex, and the rate of regular condom use among sex workers.

  17. South-East Asia.

    PubMed

    Bain, I

    1998-01-01

    This article reviews the literature on migration and HIV infections in the Mekong Region countries of Cambodia, China, Laos, Myanmar, Thailand, and Viet Nam. The HIV/AIDS situation is profiled in each country. The populations at risk include legal and undocumented cross-border migrants, internal migrants, sex workers, and mobile occupational persons, such as truck drivers, fishermen, seafarers, and cross-border traders. Currently, there is little regional cooperation on the issue of HIV among migrants. Prevalence is high in most of the region. Programs range from being very developed in Thailand to minimal in China. Recently, nongovernmental organizations have created innovative models. AIDSCAP studies have focused on river trade routes along the Thai-Lao border and fishing ports in Thailand and Cambodia. The Asian Research Center for Migration has researched fishermen in 6 countries; Burmese women in Thailand; migrants along the Thai-Myanmar borders; and the impact of transportation routes on the spread of HIV/AIDS along six main inter-country routes. Coordination of Action Research has engaged in research and action projects in 8 southeast Asian countries. The region would benefit from information exchanges about lessons learned and best practices. Field researchers could use better technical support. Regional strategies are useful for providing support from origin to destination. PMID:12295096

  18. 2010 Follow-Up of the Community College of Denver FastStart Program

    ERIC Educational Resources Information Center

    Bragg, Debra D.; Baker, Elaine Delott; Puryear, Margaret

    2010-01-01

    An educational initiative that is receiving increased attention nationally is accelerated developmental education, and the Community College of Denver (CCD) is at the forefront of this reform activity. As part of CCD's portfolio of developmental education strategies, the accelerated program called FastStart has become an important vehicle for…

  19. 37. Photocopy of Photograph(original located in Univ. of Denver collection). ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    37. Photocopy of Photograph(original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. NORTH AND MIDDLE DAMS, MILNER DAM, MAIN CHANNEL DAM, FOREGROUND; MIDDLE DAM AND TUNNEL REGULATORS, BACKGROUND. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  20. Locating Quality and Access: The Keys to Denver's Plan for Educational Excellence

    ERIC Educational Resources Information Center

    National Association of Charter School Authorizers (NJ1), 2009

    2009-01-01

    This report provides essential new information on the relationship between the location of and enrollment in Denver public schools that meet the 2009 School Performance Framework (SPF) standards. Funded by the National Association of Charter School authorizers (NACSA), this research is designed primarily to identify and highlight those areas with…

  1. A Social Marketing Campaign in Denver: Reducing the Risk of Elder Fraud

    ERIC Educational Resources Information Center

    McKenna, Judy; Miller, Jacque; Curtis, Lisa

    2004-01-01

    Acknowledging the pain and loss senior citizens experience due to fraud, the Denver District Attorney's Office launched a campaign--"Clergy Against Senior Exploitation (CASE)"--to reduce fraud perpetrated on older persons. The thrust of this project was preventing fraud by educating older adults through their religious affiliations in order to…

  2. DETAIL OF DENVER DISC FILTER IN CO91107, SUCTION END. NOTE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    DETAIL OF DENVER DISC FILTER IN CO-91-107, SUCTION END. NOTE BEARING HOUSING WITH CAST LOGO, SUCTION PIPE GOING OFF TO THE RIGHT, AND FILTER DISC IN BACKGROUND. VACUUM INSIDE DISCS FURTHER DEWATERED CONCENTRATE. AS DISC SLOWLY ROTATED A BAR SCRAPED DRIED CONCENTRATE FROM OUTSIDE OF FILTER CLOTH. - Shenandoah-Dives Mill, 135 County Road 2, Silverton, San Juan County, CO

  3. Assessing Electronic Reserves at the University of Denver: A Faculty Satisfaction Survey

    ERIC Educational Resources Information Center

    Brown, Jennifer Everson; Sewell, Bethany B.

    2013-01-01

    With the migration from Docutek to Ares Course Reserves management system, the University of Denver's Penrose Course Reserves department reached out to faculty at the university through a mixed methods survey to determine their level of satisfaction. The Ares system, reserve-related improvements, and communication results are discussed. (Contains…

  4. A Comparison of the Alternative and Traditional Licensure Programs at Metropolitan State College of Denver.

    ERIC Educational Resources Information Center

    Heyman, Ernest L.

    This study evaluated Metropolitan State College of Denver's Teacher-in-Residence (TiR) alternative licensure program. To participate, teacher candidates must possess a baccalaureate degree, have a teaching contract in a participating local school district, enroll in the TiR program, and pass a state content test. This study examined what Metro…

  5. Sharing the Load Denver Public Schools' Differentiated Roles Pilot

    ERIC Educational Resources Information Center

    Aspen Institute, 2014

    2014-01-01

    To assist system administrators as they pursue their own teacher leadership initiatives, this profile from Leading Educators and the Aspen Institute details the steps Denver Public Schools (DPS) took to design and implement its Differentiated Roles pilot. Specifically, it examines the initiative's opportunities and challenges within the…

  6. Outcome for Children Receiving the Early Start Denver Model before and after 48 Months

    ERIC Educational Resources Information Center

    Vivanti, Giacomo; Dissanayake, Cheryl

    2016-01-01

    The Early Start Denver Model (ESDM) is an intervention program recommended for pre-schoolers with autism ages 12-48 months. The rationale for this recommendation is the potential for intervention to affect developmental trajectories during early sensitive periods. We investigated outcomes of 32 children aged 18-48 months and 28 children aged…

  7. Language Socialization and Ensuing Identity Construction among Ethiopian Immigrants in Metropolitan Denver

    ERIC Educational Resources Information Center

    Weldeyesus, Weldu Michael

    2009-01-01

    The purpose of this dissertation was to conduct a sociocultural linguistic study on Ethiopian immigrants in the Denver metropolis. It specifically examined language practice of Ethiopian immigrants at home and in church. The study centered on three Ethiopian Orthodox parish churches, taken as separate communities of practice. The study was…

  8. PARTICULATE MATTER AND RESPIRATORY ADMISSIONS AMONG U.S. VETERANS IN DENVER

    EPA Science Inventory

    Previous studies have found that ambient particulate matter levels were associated with respiratory admissions as a principal diagnosis. We examined this association among 17,933 admissions to the Denver VA Medical Center over a six-year period (1994-1999) after restricting to m...

  9. Can the Red Man Help the White Man? A Denver Conference with the Indian Elders (1968).

    ERIC Educational Resources Information Center

    Morey, Sylvester M., Ed.

    Edited proceedings of the 1968 Denver Conference of Indian Elders (a joint project sponsored by the Myrin Institute with the coorperation of Arrow Incorporated and the Bureau of Indian Affairs) are presented in book form for purposes of exploring the extent to which American Indian philosophy/religion can be utilized to help solve the complex…

  10. Progress Report on the Student Astronomy Lab telescope at the University of Denver

    NASA Astrophysics Data System (ADS)

    Mellon, R. R.; Scheld, D. L.; Stencel, R. E.

    2004-05-01

    Integration and test activities associated with a new telescope for the Student Astronomy Laboratory (SAL) at the University of Denver are currently nearing completion on the main Denver campus. The 76.2-cm aperture SAL telescope incorporates novel design features, enabling it to operate as the first professional astronomical teaching and research telescope expressly designed to include use by wheelchair accommodated observers. The telescope is located 23-m above ground level on the fifth floor roof of the Space Sciences Laboratory building and is supported by a steel tower structure from the fourth floor support beams in the NW corner of the building. An afocal Mersenne optical configuration is used to send a collimated beam through the RA and DEC axes of the mounting, through a figure-4 mirror set, and thence vertically downward into a periscope, where condensing optics form an image plane accessible to visible band and IR detectors. A technical description of the telescope installation is provided, along with photographs illustrating key design features. Wheelchair-bound observers can enter the fourth floor lab and make use of an eye-level eyepiece when suitable periscope optics are installed. The SAL installation will be accessible to visitors by pre-arrangement with DU Observatories during the Denver AAS meeting [#204]. We are grateful to Glenn Montgpomery, Sarah Nelson and the estate of William Herschel Womble for their support of this University of Denver astronomy project.

  11. Denver Public Schools, Department of Health Services. Forty-Eighth Annual Report, 1972-1973.

    ERIC Educational Resources Information Center

    Denver Public Schools, CO.

    This report details the programs and activities of the Department of Health Services of the Denver Public Schools, 1972-73. The first section, New Projects and Special Activities of the Department, presents health programs initiated in elementary and secondary schools and among adult employees. The development of a joint plan to give community…

  12. The Early Start Denver Model: A Case Study of an Innovative Practice

    ERIC Educational Resources Information Center

    Vismara, Laurie A.; Rogers, Sally J.

    2008-01-01

    Intervention was implemented with an infant identified at 9 months of age with a behavioral profile consistent with autistic spectrum disorder. The intervention approach, the Early Start Denver model, consisted of a 12-week, 1.5-hr-per-week individualized parent-child education program. Results of this case study demonstrated that the parent…

  13. Denver Public Schools, Division of Health Services. Forty-Sixth Annual Report, 1970-1971.

    ERIC Educational Resources Information Center

    Denver Public Schools, CO.

    This publication from the Division of Health Services in the Denver Public Schools details new projects initiated in 1970-71. Some of these projects include a) extension of dental care in kindergarten through seventh grade and among pupils in the Neighborhood Youth Corps, b) initiation of rubella immunization centers in the elementary schools, c)…

  14. The Colorado Adoption Project.

    PubMed

    Plomin, R; DeFries, J C

    1983-04-01

    This report provides an overview of the Colorado Adoption Project (CAP), a longitudinal, prospective, multivariate adoption study of behavioral development. Examples of the types of analyses that can be conducted using this design are presented. The examples are based on general cognitive-ability data for adoptive, biological, and control parents; assessments of their home environment; and Bayley Mental Development Index scores for 152 adopted children and 120 matched control children tested at both 1 and 2 years of age. The illustrative analyses include matched control children tested at both 1 and 2 years of age. The illustrative analyses include examination of genetic and environmental sources of variance, identification of environmental influence devoid of genetic bias, assessment of genotype-environment interaction and correlation, and analyses of the etiology of change and continuity in development.

  15. Pikes Peak, Colorado

    USGS Publications Warehouse

    Brunstein, Craig; Quesenberry, Carol; Davis, John; Jackson, Gene; Scott, Glenn R.; D'Erchia, Terry D.; Swibas, Ed; Carter, Lorna; McKinney, Kevin; Cole, Jim

    2006-01-01

    For 200 years, Pikes Peak has been a symbol of America's Western Frontier--a beacon that drew prospectors during the great 1859-60 Gold Rush to the 'Pikes Peak country,' the scenic destination for hundreds of thousands of visitors each year, and an enduring source of pride for cities in the region, the State of Colorado, and the Nation. November 2006 marks the 200th anniversary of the Zebulon M. Pike expedition's first sighting of what has become one of the world's most famous mountains--Pikes Peak. In the decades following that sighting, Pikes Peak became symbolic of America's Western Frontier, embodying the spirit of Native Americans, early explorers, trappers, and traders who traversed the vast uncharted wilderness of the Western Great Plains and the Southern Rocky Mountains. High-quality printed paper copies of this poster are available at no cost from Information Services, U.S. Geological Survey (1-888-ASK-USGS).

  16. 77 FR 23498 - Notice of Intent To Repatriate Cultural Items: The Colorado College, Colorado Springs, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-19

    ... the Denver Museum of Nature & Science (formerly known as the Denver Museum of Natural History). In... sole responsibility of the museum, institution or Federal agency that has control of the Native.... History and Description of the Cultural Items The 11 unassociated funerary objects are one basket and...

  17. Evidence of emissions from oil and gas drilling operations in northeastern Colorado

    NASA Astrophysics Data System (ADS)

    Petron, G.; Montzka, S. A.; Karion, A.; Miller, B. R.; Frost, G. J.; Hirsch, A.; Sweeney, C.; Andrews, A. E.; Dlugokencky, E. J.; Hall, B. D.; Trainer, M.; Welsh, D. C.; Wolfe, D. E.; Tans, P. P.

    2010-12-01

    Since 2007, air samples collected regularly at NOAA tall towers and from aircraft across the US have been analyzed for over sixty different species, including greenhouse gases (CO2, CH4, N2O, SF6), CO, several hydrocarbons (propane, n-butane, pentanes, benzene, acetylene), and ozone-depleting substances. The Boulder Atmospheric Observatory (BAO) is a 300-m tall tower located 35 km north of the Denver metropolitan area in the northern Colorado Front Range. The BAO sits on the southwestern edge of the Denver-Julesburg Basin (DJB), home to over 15,000 oil and gas wells. Using in-situ meteorological data, we analyze the air composition of the BAO samples for three different wind sectors: the North and East sector (with strong contributions from oil and gas production operations and cattle feedlots), the South sector (dominated by the Denver urban area), and the West sector (containing the foothills of the Rocky Mountains and a few oil and gas wells). Air samples from the BAO North and East sector exhibit enhanced levels of alkanes that are strongly correlated with each other. To put these BAO samples in a regional context, we drove a mobile laboratory around BAO during the summer of 2008. A continuous methane analyzer was used to detect regional enhancements in methane and local plumes from point sources (including a natural gas processing plant, feedlot, and waste water treatment plant). Targeted air samples within and outside of plumes were collected and later analyzed in the NOAA lab. Samples collected over the DJB show very similar molar ratios of alkanes as the BAO samples from the North and East sector. These alkane ratios compare very well with the ratios measured in over 70 natural gas samples collected at various wells in the DJB in 2006.

  18. Alteration and vein mineralization, Schwartzwalder uranium deposit, Front Range, Colorado

    SciTech Connect

    Wallace, A.R.

    1983-01-01

    The Schwartzwalder uranium deposit, in the Front Range west of Denver, Colorado, is the largest vein-type uranium deposit in the US. The deposit is situated in a steeply dipping fault system that cuts Proterozoic metamorphic rocks. The host rocks represent a submarine volcanic system with associated chert and iron- and sulfide-rich pelitic rocks. Where faulted, the more competent garnetiferous and quartizitic units behaved brittlely, and created a deep, narrow conduit. The ores formed 70-72 m.y. ago beneath 3 km of Phanerozoic sedimentary rocks. Mineralization included two episodes of alteration and three stages of vein mineralization. Early carbonate-sericite alteration pseudomorphically replaced mafic minerals, whereas the ensuring hematite-adularia episode replaced only the earlier alteration assemblage. Geologic and chemical evidence suggest that virtually all components of the deposit were derived from major hornblende gneiss units and related rocks. The CO/sub 2/ fugacity was initially near 100 bars, and uranium was carried as a dicarbonate complex. Sudden decreases in confining pressure with faulting caused evolution of CO/sub 2/ and a consequent increase in pH. Uranium was released with destruction of the uranyl complexes, and was subsequently reduced by aqueous sulfur species, thereby leading to the precipitation of pitchblende.

  19. The Colorado front range: anatomy of a Laramide uplift

    USGS Publications Warehouse

    Kellogg, Karl; Bryant, Bruce; Reed, John C.

    2004-01-01

    Along a transect across the Front Range from Denver to the Blue River valley near Dillon, the trip explores the geologic framework and Laramide (Late Cretaceous to early Eocene) uplift history of this basement-cored mountain range. Specific items for discussion at various stops are (1) the sedimentary and structural record along the upturned eastern margin of the range, which contains several discontinuous, east-directed reverse faults; (2) the western structural margin of the range, which contains a minimum of 9 km of thrust overhang and is significantly different in structural style from the eastern margin; (3) mid- to late-Tertiary modifications to the western margin of the range from extensional faulting along the northern Rio Grande rift trend; (4) the thermal and uplift history of the range as revealed by apatite fission track analysis; (5) the Proterozoic basement of the range, including the significance of northeast-trending shear zones; and (6) the geologic setting of the Colorado mineral belt, formed during Laramide and mid-Tertiary igneous activity.

  20. Water quality at a biosolids-application area near Deer Trail, Colorado, 1993-1999

    USGS Publications Warehouse

    Yager, Tracy J.B.

    2014-01-01

    The Metro Wastewater Reclamation District (Metro District) in Denver, Colo., applied biosolids resulting from municipal sewage treatment to farmland in eastern Colorado beginning in December 1993. In mid-1993, the U.S. Geological Survey in cooperation with the Metro District began monitoring water quality at the biosolids-application area about 10 miles east of Deer Trail, Colo., to evaluate baseline water quality and the combined effects of natural processes, land uses, and biosolids applications on water quality of the biosolids application area. Water quality was characterized by baseline and post-biosolids-application sampling for selected inorganic and bacteriological constituents during 1993 through 1998, with some additional specialized sampling in 1999. The study included limited sampling of surface water and the unsaturated zone, but primarily focused on groundwater. See report for complete abstract.

  1. Serologic survey for cross-species pathogens in urban coyotes (Canis latrans), Colorado, USA.

    PubMed

    Malmlov, Ashley; Breck, Stewart; Fry, Tricia; Duncan, Colleen

    2014-10-01

    Abstract As coyotes (Canis latrans) adapt to living in urban environments, the opportunity for cross-species transmission of pathogens may increase. We investigated the prevalence of antibodies to pathogens that are either zoonotic or affect multiple animal species in urban coyotes in the Denver metropolitan area, Colorado, USA, in 2012. We assayed for antibodies to canine parvovirus-2, canine distemper virus, rabies virus, Toxoplasma gondii, Yersinia pestis, and serotypes of Leptospira interrogans. Overall, 84% of the animals had antibodies to canine parvovirus-2, 44% for canine distemper virus, 20% for T. gondii (IgG), 28% for Y. pestis, and 4% for L. interrogans serotype Grippotyphosa. No neutralizing antibodies were detected to rabies virus, T. gondii (IgM), or L. interrogans serotypes other than Grippotyphosa. With 88% of animals exposed to at least one pathogen, our results suggest that coyotes may serve as important reservoirs and sentinels for etiologic agents.

  2. Serologic survey for cross-species pathogens in urban coyotes (Canis latrans), Colorado, USA.

    PubMed

    Malmlov, Ashley; Breck, Stewart; Fry, Tricia; Duncan, Colleen

    2014-10-01

    Abstract As coyotes (Canis latrans) adapt to living in urban environments, the opportunity for cross-species transmission of pathogens may increase. We investigated the prevalence of antibodies to pathogens that are either zoonotic or affect multiple animal species in urban coyotes in the Denver metropolitan area, Colorado, USA, in 2012. We assayed for antibodies to canine parvovirus-2, canine distemper virus, rabies virus, Toxoplasma gondii, Yersinia pestis, and serotypes of Leptospira interrogans. Overall, 84% of the animals had antibodies to canine parvovirus-2, 44% for canine distemper virus, 20% for T. gondii (IgG), 28% for Y. pestis, and 4% for L. interrogans serotype Grippotyphosa. No neutralizing antibodies were detected to rabies virus, T. gondii (IgM), or L. interrogans serotypes other than Grippotyphosa. With 88% of animals exposed to at least one pathogen, our results suggest that coyotes may serve as important reservoirs and sentinels for etiologic agents. PMID:25121408

  3. A tropical rainforest in Colorado 1.4 million years after the Cretaceous-Tertiary boundary.

    PubMed

    Johnson, Kirk R; Ellis, Beth

    2002-06-28

    An extremely diverse lower Paleocene (64.1 million years ago) fossil leaf site from Castle Rock, Colorado, contains fossil litter that is similar to the litter of extant equatorial rainforests. The presence of a high-diversity tropical rainforest is unexpected, because other Paleocene floras are species-poor, a feature generally attributed to the Cretaceous-Tertiary (K-T) extinction. The site occurs on the margin of the Denver Basin in synorogenic sedimentary rocks associated with the rise of the Laramide Front Range. Orographic conditions caused by local topography, combined with equable climate, appear to have allowed for the establishment of rainforests within 1.4 million years of the K-T boundary.

  4. New Technology Demonstration of the Whole-Building Diagnostician at the Federal Aviation Administration-Denver Airport

    SciTech Connect

    Pratt, Robert G.; Bauman, Nathan N.; Katipamula, Srinivas

    2003-01-17

    This report describes results from an evaluation of the Whole Building Diagnostician's (WBD) ability to automatically and continually diagnose operational problems in building air handlers at the Federal Aviation Administration's Denver airport.

  5. Institutional Response to Climate Change: Water Provider Organizations in the Denver Metropolitan Region

    NASA Astrophysics Data System (ADS)

    Rhodes, Steven L.; Miller, Kathleen A.; Macdonnell, Lawrence J.

    1992-01-01

    This study addresses regional adjustments to possible reductions in water availability which may occur with a future climate change. The study assesses potential responses of urban water suppliers to reduced water availability by examining an analogous case of reduced supply in the Denver metropolitan region. In this case the U.S. Environmental Protection Agency's veto of a large surface storage project (the Two Forks dam) prompted water providers in metropolitan Denver to take other actions to ensure adequate future water supply. In some cases, actions taken since the veto process began represent a departure from previous water provider policies. It is argued that similar institutional adjustments may occur due to climate change-induced reductions in regional water supplies and that useful lessons may be drawn from an analysis of institutional responses to the Two Forks veto. This paper introduces what is envisioned as a long-term assessment of regional adjustments to reduced future water supplies.

  6. Langley Mobile Ozone Lidar (LMOL) results from the Denver, CO DISCOVER-AQ campaign

    NASA Astrophysics Data System (ADS)

    De Young, Russell; Carrion, William; Pliutau, Denis; Ganoe, Rene

    2015-10-01

    The Langley Mobile Ozone Lidar (LMOL) is a compact mobile differential absorption lidar (DIAL) system that was developed at NASA Langley Research Center, Hampton, VA, USA to provide ozone, aerosol and cloud atmospheric measurements in a mobile trailer for ground-based atmospheric air quality campaigns. This lidar is part of the Tropospheric Ozone Lidar Network (TOLNet) currently made up of six other ozone lidars across the U.S and Canada. This lidar has been deployed to Denver, CO July 15-August 15, 2014 for the DISCOVER-AQ air quality campaign. Ozone and aerosol profiles were taken showing the influence of emissions from the Denver region. Results of ozone concentration, aerosol scattering ratio, boundary layer height and clouds will be presented with emphasis on regional air quality.

  7. DETAIL OF FILTER DISCS ON DENVER FILTER IN CO91107. AS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    DETAIL OF FILTER DISCS ON DENVER FILTER IN CO-91-107. AS DISCS SLOWLY ROTATE, VACUUM INSIDE DISCS ATTRACT SLURRY IN THE SUMP AND DEWATERS CONCENTRATE AS DISCS MOVE THROUGH AIR. FURTHER ROTATION PASSES A BAR TO SCRAPE OFF DRIED METAL CONCENTRATE, ASSISTED BY BLASTS OF COMPRESSED AIR. METAL CONCENTRATE READY FOR SHIPMENT TO SMELTER FALLS INTO BIN BELOW. EIMCO FILTERS OPERATE SIMILARLY. - Shenandoah-Dives Mill, 135 County Road 2, Silverton, San Juan County, CO

  8. Habitat Metro Denver -- Perfecting Award-Winning Affordable Homes Using Building America's Integrated Design Approach

    SciTech Connect

    Not Available

    2004-12-01

    Habitat for Humanity's goal is to supply quality housing to poor families while reducing their energy cost burden, especially in light of ever-increasing energy prices. Habitat Metro Denver partnered with the U.S. Department of Energy's Building America Project and the National Renewable Energy Laboratory to improve their construction and design process to create an affordable home that is not only cost-effective and volunteer friendly to build but highly energy efficient and a comfortable place to live.

  9. Problems associated with the use of urea-formaldehyde foam for residential insulation. Part III. Residential studies in Colorado and Wisconsin

    SciTech Connect

    Schutte, W.C.; Cole, R.S.; Frank, C.W.; Long, K.R.

    1981-02-01

    Formaldehyde levels were measured in homes in problem and non-problem areas in Wisconsin and Colorado to elucidate the severity and the extent of formaldehyde emission under field conditions, help correlate laboratory findings with field observations, and investigate the cause and effect relationship between insulation stability and weather conditions of an area. Methods for selecting homes and sampling are described. Interviews were conducted with occupants of the homes and the data are tabulated. Results are summarized. Investigation forms are shown and weather information in Denver and Wisconsin is tabulated. (MCW)

  10. Comprehensive Health Effects Testing Program for Denver's Potable Water Reuse Demonstration Project.

    PubMed

    Lauer, W C; Johns, F J; Wolfe, G W; Myers, B A; Condie, L W; Borzelleca, J F

    1990-08-01

    The Comprehensive Health Effects Testing Program for the Denver Water Department's Potable Water Reuse Demonstration Project is designed to evaluate the relative health effects of highly treated reclaimed water derived from secondary wastewater compared to Denver's present high-quality drinking water. The 1 million gallon per day (1 mgd) demonstration plant provides water to be evaluated in the studies treating unchlorinated secondary treated wastewater with the following additional processes: high pH lime clarification, recarbonation, filtration, ultraviolet irradiation, activated carbon adsorption, reverse osmosis, air stripping, ozonation, and chloramination. An additional sample is obtained from the identical treatment process substituting ultrafiltration for reverse osmosis. The toxicology tests to evaluate the possible long-term health effects are chronic toxicity and oncogenicity studies in Fischer 344 rats and B6C3F1 mice and reproductive/teratology in Sprague-Dawley rats. The results of these evaluations will be correlated with microbiological, chemical, and physical test results to establish the relative quality of reclaimed water compared to all established health standards as well as Denver's pristine drinking water. PMID:2388301

  11. The Colorado Adoption Project.

    PubMed

    Rhea, Sally-Ann; Bricker, Josh B; Wadsworth, Sally J; Corley, Robin P

    2013-02-01

    This paper describes the Colorado Adoption Project (CAP), an ongoing genetically informative longitudinal study of behavioral development. We describe the features of the adoption design used in CAP, and discuss how this type of design uses data from both parent-offspring and related- versus unrelated-sibling comparisons to estimate the importance of genetic and shared environmental influences for resemblance among family members. The paper provides an overview of CAP's history, how subjects were ascertained, recruited, and retained, and the domains of assessment that have been explored since the CAP's initiation in 1975. Findings from some representative papers that make use of data from CAP participants illustrate the study's multifaceted nature as a parent-offspring and sibling behavioral genetic study, a study that parallels a complimentary twin study, a longitudinal study of development, a source of subjects for molecular genetic investigation, and a study of the outcomes of the adoption process itself. As subjects assessed first at age 1 approach age 40, we hope the CAP will establish itself as the first prospective adoption study of lifespan development.

  12. The Colorado Adoption Project

    PubMed Central

    Rhea, Sally-Ann; Bricker, Josh B.; Wadsworth, Sally J.; Corley, Robin P.

    2013-01-01

    This paper describes the Colorado Adoption Project (CAP), an ongoing genetically-informative longitudinal study of behavioral development. We describe the features of the adoption design used in CAP, and discuss how this type of design uses data from both parent-offspring and related- versus unrelated- sibling comparisons to estimate the importance of genetic and shared environmental influences for resemblance among family members. The paper provides an overview of CAP’s history, how subjects were ascertained, recruited, and retained, and the domains of assessment that have been explored since the CAP’s initiation in 1975. Findings from some representative papers that make use of data from CAP participants illustrate the study’s multifaceted nature as a parent-offspring and sibling behavioral genetic study, a study that parallels a complimentary twin study, a longitudinal study of development, a source of subjects for molecular genetic investigation, and a study of the outcomes of the adoption process itself. As subjects assessed first at age 1 approach age 40, we hope the CAP will establish itself as the first prospective adoption study of lifespan development. PMID:23158098

  13. Floods in Colorado

    USGS Publications Warehouse

    Follansbee, Robert; Sawyer, Leon R.

    1948-01-01

    The first records of floods in Colorado antedated the settlement of the State by about 30 years. These were records of floods on the Arkansas and Republican Rivers in 1826. Other floods noted by traders, hunters and emigrants, some of whom were on their way to the Far West, occurred in 1844 on the Arkansas River, and by inference on the South Platte River. Other early floods were those on the Purgatoire, the Lower Arkansas, and the San Juan Rivers about 1859. The most serious flood since settlement began was that on the Arkansas River during June 1921, which caused the loss of about 100 lives and an estimated property loss of $19,000,000. Many floods of lesser magnitude have occurred, and some of these have caused loss of life and very considerable property damage. Topography is the chief factor in determining the location of storms and resulting floods. These occur most frequently on the eastern slope of the Front Range. In the mountains farther west precipitation is insufficient to cause floods except during periods of melting snow, in June. In the southwestern part of the State, where precipitation during periods of melting snow is insufficient to cause floods, the severest floods yet experienced resulted from heavy rains in September 1909 and October 1911. In the eastern foothills region, usually below an altitude of about 7,500 feet and extending for a distance of about 50 miles east of the mountains, is a zone subject to rainfalls of great intensity known as cloudbursts. These cloudbursts are of short duration and are confined to very small areas. At times the intensity is so great as to make breathing difficult for those exposed to a storm. The areas of intense rainfall are so small that Weather Bureau precipitation stations have not been located in them. Local residents, being cloudburst conscious, frequently measure the rainfall in receptacles in their yards, and such records constitute the only source of information regarding the intensity. A flood

  14. On Road Study of Colorado Front Range Greenhouse Gases Distribution and Sources

    NASA Astrophysics Data System (ADS)

    Petron, G.; Hirsch, A.; Trainer, M. K.; Karion, A.; Kofler, J.; Sweeney, C.; Andrews, A.; Kolodzey, W.; Miller, B. R.; Miller, L.; Montzka, S. A.; Kitzis, D. R.; Patrick, L.; Frost, G. J.; Ryerson, T. B.; Robers, J. M.; Tans, P.

    2008-12-01

    The Global Monitoring Division and Chemical Sciences Division of the NOAA Earth System Research Laboratory have teamed up over the summer 2008 to experiment with a new measurement strategy to characterize greenhouse gases distribution and sources in the Colorado Front Range. Combining expertise in greenhouse gases measurements and in local to regional scales air quality study intensive campaigns, we have built the 'Hybrid Lab'. A continuous CO2 and CH4 cavity ring down spectroscopic analyzer (Picarro, Inc.), a CO gas-filter correlation instrument (Thermo Environmental, Inc.) and a continuous UV absorption ozone monitor (2B Technologies, Inc., model 202SC) have been installed securely onboard a 2006 Toyota Prius Hybrid vehicle with an inlet bringing in outside air from a few meters above the ground. To better characterize point and distributed sources, air samples were taken with a Portable Flask Package (PFP) for later multiple species analysis in the lab. A GPS unit hooked up to the ozone analyzer and another one installed on the PFP kept track of our location allowing us to map measured concentrations on the driving route using Google Earth. The Hybrid Lab went out for several drives in the vicinity of the NOAA Boulder Atmospheric Observatory (BAO) tall tower located in Erie, CO and covering areas from Boulder, Denver, Longmont, Fort Collins and Greeley. Enhancements in CO2, CO and destruction of ozone mainly reflect emissions from traffic. Methane enhancements however are clearly correlated with nearby point sources (landfill, feedlot, natural gas compressor ...) or with larger scale air masses advected from the NE Colorado, where oil and gas drilling operations are widespread. The multiple species analysis (hydrocarbons, CFCs, HFCs) of the air samples collected along the way bring insightful information about the methane sources at play. We will present results of the analysis and interpretation of the Hybrid Lab Front Range Study and conclude with perspectives

  15. 75 FR 52935 - Colorado Interstate Gas Company; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-30

    ... notice that on August 12, 2010, Colorado Interstate Gas Company (CIG), P.O. Box 1087, Colorado Springs.... Susan C. Stires, Director, Regulatory Affairs, Colorado Interstate Gas Company, P.O. Box 1087, Colorado... President and General Counsel, Colorado Interstate Gas Company; P.O. Box 1087, Colorado Springs,...

  16. Drug Abuse in Southeast Asia.

    ERIC Educational Resources Information Center

    Scorzelli, James F.

    This report examines the incidence of drug abuse and the methods of treatment and prevention of drug abuse used in Southeast Asia. Countries studied include Malaysia, Singapore, Thailand, Indonesia, and the Philippines. Because of Malaysia's intensive effort to eliminate its drug abuse problem, emphasis is placed on this country's treatment and…

  17. Educational Attainment in Southeast Wisconsin

    ERIC Educational Resources Information Center

    Million, Laura; Henken, Rob; Dickman, Anneliese

    2010-01-01

    In metro Milwaukee, as a part of the WIRED Initiative, the Regional Workforce Alliance (RWA)--a collaboration of organizations representing workforce development, economic development and education across southeast Wisconsin--has established the framework for pursuing the local talent dividend goal and a regional strategy for increasing…

  18. Conservation systems in the Southeast

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This presentation describes how conservation systems that include non-inversion tillage and cover crops, a key component of conservation systems, are managed in the Southeast to maximize benefits. Benefits include weed suppression, moisture conservation, and increased organic matter contents. Mana...

  19. Management Education in Southeast Asia.

    ERIC Educational Resources Information Center

    Hoong, Yip Yat, Ed.

    Management needs in Southeast Asia are the focal points of a workshop held in Penang, March 1972, by the Regional Institute of Higher Education and Development. Following the opening statement concerning these needs, the discussions at the workshop and a background paper, "Developing Management Competence," are presented. (MJM)

  20. Toward a Quantitative Assessment of the Influence of Regional Emission Sources on Ozone Production in the Colorado Front Range

    NASA Astrophysics Data System (ADS)

    McDuffie, E. E.; Dube, W. P.; Wolfe, D. E.; Tevlin, A.; Gilman, J.; Lerner, B. M.; De Gouw, J. A.; Murphy, J. G.; Fischer, E. V.; Brown, S. S.; Angevine, W. M.; Edwards, P.; Williams, E. J.

    2015-12-01

    Photochemical ozone production results from the oxidation and reaction of volatile organic compounds (VOCs) with nitrogen oxides (NOx = NO2 + NO). As with many US urban regions, ozone levels observed in the Northern Front Range Metropolitan Region of Colorado are influenced by urban emissions of NOx and VOCs. Despite nationwide decreases in these urban emissions, the Front Range of Colorado is one of the few US locations where ozone is currently increasing. It has also recently gone out of compliance with national ambient air quality standards for ozone during summer months. High ozone in Colorado may result from a number of factors, including long-range transport from Asia, increased influence of biomass burning, population increases, or increased emissions from oil and gas activities. The Front Range is home to the Denver-Julesburg (D-J) Basin, which has recently been experiencing a rise in oil and natural gas (O&NG) activity associated with the increase in non-conventional drilling techniques. The VOC and NOx emissions from O&NG activity in close proximity to the urban area may uniquely influence ozone in this region. This presentation will focus on using reactive nitrogen (NOx, NOy) and ozone measurements from a tall (300 m) tower to study the influence of local emissions on Front Range ozone. The tower is located between the D-J Basin and agricultural areas to the north and the Denver metro area to the south. In-situ reactive nitrogen and ozone measurements were collected using a custom Cavity Ring-Down instrument. Additional CH4, CO, and NH3 measurements from the tower serve as tracers for O&NG, urban, and agricultural emissions. Concurrently measured aircraft data is used to confirm the relationships between the tracer species. This presentation will discuss methods for determining the contributions of different emission sources to Front Range ozone, with a focus on differentiating the influence of urban and O&NG sources.

  1. Persistence of Ethnicity: The Japanese of Colorado.

    ERIC Educational Resources Information Center

    Endo, Russell

    This paper presents an overview of the history of Japanese in Colorado. Japanese immigrants first came to Colorado between 1900 and 1910 as railroad laborers. Some became coal miners in southern Colorado; most others became farm laborers. Although the Japanese population during this period was small, communities developed in several locales. The…

  2. 2009 KidsCount in Colorado!

    ERIC Educational Resources Information Center

    Colorado Children's Campaign, 2009

    2009-01-01

    "KidsCount in Colorado!" is an annual publication of the Colorado Children's Campaign, which provides the best available state- and county-level data to measure and track the education, health and general well-being of the state's children. KidsCount in Colorado! informs policy debates and community discussions, serving as a valuable resource for…

  3. 2008 KidsCount in Colorado!

    ERIC Educational Resources Information Center

    Colorado Children's Campaign, 2008

    2008-01-01

    "KidsCount in Colorado!" is an annual publication of the Colorado Children's Campaign, which provides the best available state- and county-level data to measure and track the education, health and general well-being of the state's children. KidsCount in Colorado! informs policy debates and community discussions, serving as a valuable resource for…

  4. KidsCount in Colorado! 1995.

    ERIC Educational Resources Information Center

    Shulman, Shanna

    This 1995 KidsCount in Colorado report examines challenges and offers examples of how prevention and early intervention strategies can make a difference in the lives of Colorado children. The report looks at the state of child well-being in Colorado in terms of health, early care and education, and primary education. Statistics and descriptions…

  5. 1. Exterior view of LongTerm Hydrazine Silo (T28E), looking southeast. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Exterior view of Long-Term Hydrazine Silo (T-28E), looking southeast. The structure was designed to assess long-term environmental impacts on storage of the Titan's fuel (hydrazine). The low-lying building to the immediate right of the silo is the Fuel Purification Structure (T-28E), constructed during the late 1960s to purify hydrazine for long-term hardware requirements for satellites and space expedition vehicles associated with the Titan III. - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Hydrazine Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

  6. An acoustic velocity measurement system for aiding barge traffic in the Colorado River locks near Matagorda, Texas

    USGS Publications Warehouse

    East, J.W.; Scheffler, C.

    2004-01-01

    In July 1999, the U.S. Geological Survey installed an acoustic Doppler velocity meter in the Colorado River, near the city of Matagorda in southeast Texas. The meter is part of an integrated system used by the U.S. Army Corps of Engineers to control barge traffic that passes through a lock system located at the confluence of the Colorado River and the Gulf Intracoastal Waterway. The meter was installed on the river bottom as part of a system developed and used by the National Weather Service. The upward-looking meter measures the average velocity in the top 3 meters (10 feet) of the water column. These river-velocity data are used in conjunction with additional velocity and water-stage data, from proximal sites, by the barge operators to assess conditions at the Colorado River crossing and for lock operations. Copyright ASCE 2004.

  7. Regulated Disposal of NORM/TENORM Waste in Colorado: The Deer Trail Landfill

    SciTech Connect

    Kennedy, W.E. Jr.; Retallick, P.G.; Kehoe, J.H.; Webb, M.M.; Nielsen, D.B.; Spaanstra, J.R.; Kornfeld, L.M.

    2006-07-01

    On January 31, 2005, Clean Harbors Environmental Services submitted a license application to the Colorado Department of Public Health and Environment (CDPHE) for the disposal of naturally occurring radioactive material (NORM) and technologically enhanced radioactive material (TENORM) at Clean Harbor's Deer Trail RCRA Subtitle C landfill. Deer Trail is located 70 miles east of Denver, Colorado. The license application for Deer Trail was submitted under CCR 1007-1, Part 14 [1] the Colorado State equivalent of 10 CFR Part 61 [2] for radioactive waste disposal. A disposal license is required since some of the NORM/TENORM waste in Colorado is licensed by CDPHE. The license application does not extend to byproduct or source material, and thus does not include the broader categories found in Class A radioactive waste. The license application requires the establishment of a radiation protection program, assuring that all NORM/TENORM waste, even non-licensed waste disposed under RCRA, will have appropriate radiological controls for workers, the public, and the environment. Because Deer Trail is a RCRA Subtitle C facility with an active RCRA Permit and because of the overlapping and similar requirements in the process to obtain either a RCRA permit or a radioactive waste disposal license, the license process for Deer Trail was appropriately focused. This focusing was accomplished by working with the Colorado Department of Public Health and Environment (CDPHE) and excluding or waiving selected radioactive materials license requirements from further consideration because they were found to be adequately addressed under the RCRA Permit. Of most significance, these requirements included: - Institutional Information - Federal or State ownership will not be required, since the State's Radiation Control regulations allow for private site ownership, consistent with the same financial assurance and institutional control requirements of RCRA. - Development of Additional Technical

  8. Residential firewood in the southeast

    SciTech Connect

    Badger, P.C.

    1995-12-31

    Wood energy plays an important role in the economy of the southeastern states, an area with abundant forest resources and a large wood industry. A 1991 SERBEP study of industrial wood energy in the southeast documents this. A complementary study has recently been made for residential wood use using an interactive computer model, the IMPLAN input/output mode. This articles describes the results of the study and notes where the full reports are available.

  9. COLORADO INDIAN EDUCATION WORKSHOP PAPERS.

    ERIC Educational Resources Information Center

    SIZEMORE, MAMIE; AND OTHERS

    THIS DOCUMENT IS A COLLECTION OF ARTICLES WRITTEN BY MEMBERS OF THE COLORADO INDIAN EDUCATION WORKSHOP. THE ARTICLES ARE CONCERNED WITH THE PROBLEMS OF SOCIAL, CULTURAL, MORAL, EMOTIONAL, AND INTELLECTUAL DEVELOPMENT OF BILINGUAL-BICULTURAL CHILDREN, AS A MEANINGFUL CURRICULUM IS DEVELOPED TO CORRELATE WITH THEIR SOCIAL AND CULTURAL ENVIRONMENT.…

  10. Rural School Communities in Colorado.

    ERIC Educational Resources Information Center

    Cousins, Jack

    Visits to nine of the smallest rural elementary schools in Colorado were conducted to gain insights into types of communities served by the schools. No one definition of "rural" covered all nine communities, so they were classified into six types: predominantly agricultural, rural industrial, stable recreational, ranching/railraod, rural commuter,…

  11. Goals for Education in Colorado.

    ERIC Educational Resources Information Center

    Colorado State Dept. of Education, Denver.

    Eleven goals for public education are set forth by the Colorado State Department of Education: (1) command of the knowledge, skills, habits, and attitudes essential for effective learning throughout life; (2) understanding of man and society and the determination to strive for the welfare of all people; (3) knowledge of self, understanding of…

  12. Kids Count in Colorado! 2003.

    ERIC Educational Resources Information Center

    Boeke, Kaye

    This Kids Count report examines state, county, and regional trends in the well-being of Colorado's children. The first part of the report is presented in four chapters. Chapter 1 includes findings regarding the increasing diversity of the child population, linguistic isolation, the impact of parental unemployment, child poverty, and the affordable…

  13. Diamond collecting in northern Colorado.

    USGS Publications Warehouse

    Collins, D.S.

    1982-01-01

    The discovery of numerous diamond-bearing kimberlite diatremes in the N Front Range of Colorado and Wyoming is of both scientific and economic interest. Species recovered from heavy-mineral concentrates include Cr-diopside, spinel, Mg-ilmenite, pyrope and diamond. A nodule tentatively identified as a graphite-diamond eclogite was also found. -G.W.R.

  14. The Colorado Caravan Workshop Manual.

    ERIC Educational Resources Information Center

    Cobin, Martin; And Others

    The second of four related manuals describing the goals and methods of an established developmental theatre project at the University of Colorado, this manual presents a hierarchical framework and practical guidelines for conducting drama workshops for elementary students, secondary students, and adults. It describes four types of…

  15. The value of a safety-net hospital case example: Denver Health.

    PubMed

    Krantz, Mori J; Brown, Carrie A; Mehler, Philip S

    2013-01-01

    Mergers in the health care are common. The safety nets are being left out, because the operating margins of these hospitals are too thin. The Accountable Care Act (ACA) may increase the financial challenges of safety nets. This is because uncompensated care disbursements such as funding of the disproportionate share hospitals are scheduled to phase down as ACA implementation proceeds. If the safety nets became financially unstable, this would destabilize the local hospital market. Denver Health has gained national recognition for its innovations and excellent quality of care. This article will promote an awareness that safety-net hospitals should be considered for collaborations.

  16. Spatiotemporal Assessment of Groundwater Resources in the South Platte Basin, Colorado

    NASA Astrophysics Data System (ADS)

    Ruybal, C. J.; McCray, J. E.; Hogue, T. S.

    2015-12-01

    The South Platte Basin is one of the most economically diverse and fastest growing basins in Colorado. Strong competition for water resources in an over-appropriated system brings challenges to meeting future water demands. Balancing the conjunctive use of surface water and groundwater from the South Platte alluvial aquifer and the Denver Basin aquifer system is critical for meeting future demands. Over the past decade, energy development in the basin has added to the competition for water resources, highlighting the need to advance our understanding of the availability and sustainability of groundwater resources. Current work includes evaluating groundwater storage changes and recharge regimes throughout the South Platte Basin under competing uses, e.g. agriculture, oil and gas, urban, recreational, and environmental. The Gravity Recovery and Climate Experiment satellites in conjunction with existing groundwater data is used to evaluate spatiotemporal variability in groundwater storage and identify areas of high water stress. Spatiotemporal data will also be utilized to develop a high resolution groundwater model of the region. Results will ultimately help stakeholders in the South Platte Basin better understand groundwater resource challenges and contribute to Colorado's strategic future water planning.

  17. Changes in Medicare Reimbursement in Colorado: Impact on Physicians' Economic Behavior

    PubMed Central

    Rice, Thomas; McCall, Nelda

    1982-01-01

    In 1976 there was a change in Medicare reimbursement policy in the State of Colorado. This study analyzes the impact of that change on physicians' economic behavior. Through 1976, prevailing charges (one of the determinants of the level of physician reimbursement under Medicare) were computed separately within each of 10 regions of Colorado. Since then, they have been computed for the State as a whole, and thus, physicians in like specialties have had equal prevailing charges throughout the State. This change in reimbursement policy led to a relative increase in prevailing charges for physicians in small urban and nonurban areas of the State, and a relative decrease for physicians in the major urban areas. In this paper we analyze the impact of this change on several aspects of physician behavior. We found that physicians whose reimbursement rates declined as a result of the change—primarily those in the Denver/Boulder area—provided more-intensive medical services, had lower assignment rates, and charged lower prices than they would have in the absence of the change. Those physicians whose reimbursement rates increased as a result of the change—primarily those in small urban and non-urban areas of Colorado—provided less-intensive services, had higher assignment rates, and charged higher prices than they would have otherwise. We did not find any evidence that physicians responded to the change by altering the number of laboratory tests and X-rays they provided. PMID:10309639

  18. Rare, large earthquakes at the laramide deformation front - Colorado (1882) and Wyoming (1984)

    USGS Publications Warehouse

    Spence, W.; Langer, C.J.; Choy, G.L.

    1996-01-01

    The largest historical earthquake known in Colorado occurred on 7 November 1882. Knowledge of its size, location, and specific tectonic environment is important for the design of critical structures in the rapidly growing region of the Southern Rocky Mountains. More than one century later, on 18 October 1984, an mb 5.3 earthquake occurred in the Laramie Mountains, Wyoming. By studying the 1984 earthquake, we are able to provide constraints on the location and size of the 1882 earthquake. Analysis of broadband seismic data shows the 1984 mainshock to have nucleated at a depth of 27.5 ?? 1.0 km and to have ruptured ???2.7 km updip, with a corresponding average displacement of about 48 cm and average stress drop of about 180 bars. This high stress drop may explain why the earthquake was felt over an area about 3.5 times that expected for a shallow earthquake of the same magnitude in this region. A microearthquake survey shows aftershocks to be just above the mainshock's rupture, mostly in a volume measuring 3 to 4 km across. Focal mechanisms for the mainshock and aftershocks have NE-SW-trending T axes, a feature shared by most earthquakes in western Colorado and by the induced Denver earthquakes of 1967. The only data for the 1882 earthquake were intensity reports from a heterogeneously distributed population. Interpretation of these reports also might be affected by ground-motion amplification from fluvial deposits and possible significant focal depth for the mainshock. The primary aftershock of the 1882 earthquake was felt most strongly in the northern Front Range, leading Kirkham and Rogers (1985) to locate the epicenters of the aftershock and mainshock there. The Front Range is a geomorphic extension of the Laramie Mountains. Both features are part of the eastern deformation front of the Laramide orogeny. Based on knowledge of regional tectonics and using intensity maps for the 1984 and the 1967 Denver earthquakes, we reinterpret prior intensity maps for the 1882

  19. West-east stratigraphic cross section of Cretaceous rocks, central Rocky Mountains to east-central Great Plains, Utah, Colorado, and Kansas

    SciTech Connect

    Fouch, T.D. )

    1991-03-01

    Cretaceous sedimentary strata varies in thickness from nearly 3,050 m adjacent to the western thrust belt at the westernmost end of the Uinta basin, Utah, to 1,700 m near the Colorado-Utah boundary east of the basin axis. They thicken locally to more than 2,800 m near local Late Cretaceous Laramide uplifts in the region between the Piceance and the western Denver basins, Colorado, and then to less than 600 m in the eastern Denver basin and Kansas. Depositional environments represented by the rocks include coarse-grained alluvial facies deposited directly adjacent to the western thrust belt, and finer grained fluvial-deltaic and marine facies of the basin's depositional and structural axis (generally within 50-100 km of the thrust belt). Entirely fine-grained marine siliciclastic and carbonate rocks were formed in more slowly subsiding distal parts of the basin that are as much as 1,000 km east of the depositional axis. Some thick sections represent deposition in lows created by sediment and thrust loading adjacent to local Laramide thick-skin thrusts within the limits of the overall Western interior Cretaceous basin. Depositional and geometric asymmetry of the preserved sedimentary system are the result of varied rates of regional and local subsidence due to tectonic and sediment loading. They also result from fluctuations in sea level and concomitant erosion associated with falls and from relative sediment starving of the parts of this depositional system that were far from sediment.

  20. Comparison of facility-level methane emission rates from natural gas production well pads in the Marcellus, Denver-Julesburg, and Uintah Basins

    NASA Astrophysics Data System (ADS)

    Omara, M.; Li, X.; Sullivan, M.; Subramanian, R.; Robinson, A. L.; Presto, A. A.

    2015-12-01

    The boom in shale natural gas (NG) production, brought about by advances in horizontal drilling and hydraulic fracturing, has yielded both economic benefits and concerns about environmental and climate impacts. In particular, leakages of methane from the NG supply chain could substantially increase the carbon footprint of NG, diminishing its potential role as a transition fuel between carbon intensive fossil fuels and renewable energy systems. Recent research has demonstrated significant variability in measured methane emission rates from NG production facilities within a given shale gas basin. This variability often reflect facility-specific differences in NG production capacity, facility age, utilization of emissions capture and control, and/or the level of facility inspection and maintenance. Across NG production basins, these differences in facility-level methane emission rates are likely amplified, especially if significant variability in NG composition and state emissions regulations are present. In this study, we measured methane emission rates from the NG production sector in the Marcellus Shale Basin (Pennsylvania and West Virginia), currently the largest NG production basin in the U.S., and contrast these results with those of the Denver-Julesburg (Colorado) and Uintah (Utah) shale basins. Facility-level methane emission rates were measured at 106 NG production facilities using the dual tracer flux (nitrous oxide and acetylene), Gaussian dispersion simulations, and the OTM 33A techniques. The distribution of facility-level average methane emission rate for each NG basin will be discussed, with emphasis on how variability in NG composition (i.e., ethane-to-methane ratios) and state emissions regulations impact measured methane leak rates. While the focus of this presentation will be on the comparison of methane leak rates among NG basins, the use of three complimentary top-down methane measurement techniques provides a unique opportunity to explore the

  1. Sediment discharge in the Colorado River near De Beque, Colorado

    USGS Publications Warehouse

    Butler, D.L.

    1986-01-01

    A study was conducted to determine annual-sediment discharge at the site of a proposed reservoir on the Colorado River at Una, located 3 miles upstream from De Beque, Colorado. Eleven suspended sediment samples were collected during 1984 at the De Beque bridge. These data were combined with suspended sediment data collected for the Colorado River at two nearby streamflow gaging stations to define relations between suspended-sediment discharge and stream discharge. Best results were obtained when the data were separated into two periods, March through October, and November through February. The data for March through October were separated into two periods: (1) Rising stream-stage period, which includes data collected prior to the data of the annual peak-stream discharge, and (2) falling stream-stage period, which includes data collected after the date of the annual peak-stream discharge. Nine bedload samples were collected during 1984 to determine the contribution of bedload sediment discharge to total sediment discharge. Bedload accounted for < 2% of total sediment discharge. The best relations describing bedload sediment discharge were obtained when the bedload data were separated into two periods: (1) Data collected prior to the date of the annual peak-stream discharge, and (2) data collected after the date of the annual peak-stream discharge. Mean annual sediment discharge in the Colorado River at the proposed Una reservoir site was estimated to be 1,065,000 tons/year for October 1966 through September 1984. Water storage capacity of the proposed reservoir would decrease about 30% after 100 years at this sediment discharge rate. (USGS)

  2. Analytical Results for Agricultural Soils Samples from a Monitoring Program Near Deer Trail, Colorado (USA)

    USGS Publications Warehouse

    Crock, J.G.; Smith, D.B.; Yager, T.J.B.

    2009-01-01

    Since late 1993, Metro Wastewater Reclamation District of Denver (Metro District, MWRD), a large wastewater treatment plant in Denver, Colorado, has applied Grade I, Class B biosolids to about 52,000 acres of nonirrigated farmland and rangeland near Deer Trail, Colorado, USA. In cooperation with the Metro District in 1993, the U.S. Geological Survey (USGS) began monitoring groundwater at part of this site. In 1999, the USGS began a more comprehensive monitoring study of the entire site to address stakeholder concerns about the potential chemical effects of biosolids applications to water, soil, and vegetation. This more comprehensive monitoring program has recently been extended through 2010. Monitoring components of the more comprehensive study include biosolids collected at the wastewater treatment plant, soil, crops, dust, alluvial and bedrock groundwater, and stream bed sediment. Soils for this study were defined as the plow zone of the dry land agricultural fields - the top twelve inches of the soil column. This report presents analytical results for the soil samples collected at the Metro District farm land near Deer Trail, Colorado, during three separate sampling events during 1999, 2000, and 2002. Soil samples taken in 1999 were to be a representation of the original baseline of the agricultural soils prior to any biosolids application. The soil samples taken in 2000 represent the soils after one application of biosolids to the middle field at each site and those taken in 2002 represent the soils after two applications. There have been no biosolids applied to any of the four control fields. The next soil sampling is scheduled for the spring of 2010. Priority parameters for biosolids identified by the stakeholders and also regulated by Colorado when used as an agricultural soil amendment include the total concentrations of nine trace elements (arsenic, cadmium, copper, lead, mercury, molybdenum, nickel, selenium, and zinc), plutonium isotopes, and gross

  3. Origin of the late quaternary dune fields of northeastern Colorado

    USGS Publications Warehouse

    Muhs, D.R.; Stafford, T.W.; Cowherd, S.D.; Mahan, S.A.; Kihl, R.; Maat, P.B.; Bush, C.A.; Nehring, J.

    1996-01-01

    Stabilized eolian deposits, mostly parabolic dunes and sand sheets, cover much of the landscape of northeastern Colorado and adjacent parts of southwestern Nebraska in four geographically distinct dune fields. Stratigraphic and soil-geomorphic relations and accelerator radiocarbon dating indicate that at least three episodes of eolian sand movement occurred between 27 ka and 11 ka, possibly between 11 ka and 4 ka, and within the past 1.5 ka. Thus, eolian sand deposition took place under both glacial and interglacial climatic conditions. In the youngest episodes of eolian sand movement, Holocene parabolic dunes partially buried Pleistocene sand sheet deposits. Late Holocene sands in the Fort Morgan and Wray dune fields, to the south of the South Platte River, have trace element ratios that are indistinguishable from modern South Platte River sands, but different from Ogallala Formation bedrock, which has previously been cited as the main source of dune sand on the Great Plains. Sands in the Greeley dune field, to the north of the South Platte River, have trace element concentrations that indicate a probable Laramie Formation source. Measurements of parabolic dunes indicate paleowinds from the northwest in all dune fields, in good agreement with resultant drift directions calculated for nearby weather stations. Thus, paleowinds were probably not significantly different from present-day winds, and are consistent with a South Platte River source for the Fort Morgan and Wray dune fields, and a Laramie Formation source for the Greeley dune field. Sand accumulated downwind of the South Platte River to form the Fort Morgan dune field. In addition, sand was also transported farther downwind over the upland formed by the calcrete caprock of the Ogallala Formation, and deposited in die lee of the upland on the southeast side. Because of high wind energy, the upland itself served as a zone of sand transport, but little or no sand accumulation took place on this surface. These

  4. Alteration and vein mineralization, Schwartzwalder uranium deposit, Front Range, Colorado

    USGS Publications Warehouse

    Wallace, Alan R.

    1983-01-01

    The Schwartzwalder uranium deposit, in the Front Range west of Denver, Colorado, is the largest vein-type uranium deposit in the United States. The deposit is situated in a steeply dipping fault system that cuts Proterozoic metamorphic rocks. The host rocks represent a submarine volcanic system with associated chert and iron- and sulfide-rich pelitic rocks. Where faulted, the more competent garnetiferous and quartzitic units behaved brittlely and created a deep, narrow conduit. The ores formed 70-72 m.y. ago beneath 3 km of Phanerozoic sedimentary rocks. Mineralization included two episodes of alteration and three stages of vein-mineralization. Early carbonate-sericite alteration pseudomorphically replaced mafic minerals, whereas the ensuing hematite-adularia episode replaced only the earlier alteration assemblage. Early vein mineralization produced a minor sulfide-adularia-carbonate assemblage. Later vein mineralization generated the uranium ores in two successive stages. Carbonates, sulfides, and adularia filled the remaining voids. Clastic dikes composed of fault gouge and, locally, ore were injected into new and existing fractures. Geologic and chemical evidence suggest that virtually all components of the deposit were derived from major hornblende gneiss units and related rocks. The initial fluids were evolved connate/metamorphic water that infiltrated and resided along the extensive fault zones. Complex fault movements in the frontal zone of the eastern Front Range caused the fluids to migrate to the most permeable segments of the fault zones. Heat was supplied by increased crustal heat flow related to igneous activity in the nearby Colorado mineral belt. Temperatures decreased from 225?C to 125?C during later mineralization, and the pressure episodically dropped from 1000 bars. The CO2 fugacity was initially near 100 bars, and uranium was carried as a dicarbonate complex. Sudden decreases in confining pressure during fault movement caused evolution of CO2

  5. Gunnison, Colorado, subpile study report

    SciTech Connect

    Not Available

    1994-03-01

    To protect human health and the environment, the UMTRA project will remediate the uranium mill tailings site at Gunnison, Colorado. There are explicit requirements (i.e., 40 Part CFR Part 192) for the surface remediation of radiologically contaminated soils on UMTRA sites. The removal of subpile sediment to the depth required by 40 CFR Part 192 will leave in place deeper foundation sediment that is contaminated with hazardous constituents other than radium-226 and thorium-230. The Department of Energy and the Colorado Department of Health have questioned whether this contaminated soil could potentially act as a continuing source of ground water contamination even after surface remediation based on 40 CFR Part 192 is complete. To evaluate the subpile sediments as a potential source of ground water contamination, the Gunnison subpile study was initiated. This report summarizes the results and findings of this study.

  6. Analytical Results for Municipal Biosolids Samples from a Monitoring Program Near Deer Trail, Colorado (U.S.A.), 2008

    USGS Publications Warehouse

    Crock, J.G.; Smith, D.B.; Yager, T.J.B.; Berry, C.J.; Adams, M.G.

    2009-01-01

    Since late 1993, Metro Wastewater Reclamation District of Denver (Metro District), a large wastewater treatment plant in Denver, Colo., has applied Grade I, Class B biosolids to about 52,000 acres of nonirrigated farmland and rangeland near Deer Trail, Colo. (U.S.A.). In cooperation with the Metro District in 1993, the U.S. Geological Survey (USGS) began monitoring groundwater at part of this site. In 1999, the USGS began a more comprehensive monitoring study of the entire site to address stakeholder concerns about the potential chemical effects of biosolids applications to water, soil, and vegetation. This more comprehensive monitoring program has recently been extended through 2010. Monitoring components of the more comprehensive study include biosolids collected at the wastewater treatment plant, soil, crops, dust, alluvial and bedrock groundwater, and stream-bed sediment. Streams at the site are dry most of the year, so samples of stream-bed sediment deposited after rain were used to indicate surface-water effects. This report will present only analytical results for the biosolids samples collected at the Metro District wastewater treatment plant in Denver and analyzed during 2008. Crock and others have presented earlier a compilation of analytical results for the biosolids samples collected and analyzed for 1999 thru 2006, and in a separate report, data for the 2007 biosolids are reported. More information about the other monitoring components is presented elsewhere in the literature. Priority parameters for biosolids identified by the stakeholders and also regulated by Colorado when used as an agricultural soil amendment include the total concentrations of nine trace elements (arsenic, cadmium, copper, lead, mercury, molybdenum, nickel, selenium, and zinc), plutonium isotopes, and gross alpha and beta activity. Nitrogen and chromium also were priority parameters for groundwater and sediment components.

  7. Continental crust beneath southeast Iceland.

    PubMed

    Torsvik, Trond H; Amundsen, Hans E F; Trønnes, Reidar G; Doubrovine, Pavel V; Gaina, Carmen; Kusznir, Nick J; Steinberger, Bernhard; Corfu, Fernando; Ashwal, Lewis D; Griffin, William L; Werner, Stephanie C; Jamtveit, Bjørn

    2015-04-14

    The magmatic activity (0-16 Ma) in Iceland is linked to a deep mantle plume that has been active for the past 62 My. Icelandic and northeast Atlantic basalts contain variable proportions of two enriched components, interpreted as recycled oceanic crust supplied by the plume, and subcontinental lithospheric mantle derived from the nearby continental margins. A restricted area in southeast Iceland--and especially the Öræfajökull volcano--is characterized by a unique enriched-mantle component (EM2-like) with elevated (87)Sr/(86)Sr and (207)Pb/(204)Pb. Here, we demonstrate through modeling of Sr-Nd-Pb abundances and isotope ratios that the primitive Öræfajökull melts could have assimilated 2-6% of underlying continental crust before differentiating to more evolved melts. From inversion of gravity anomaly data (crustal thickness), analysis of regional magnetic data, and plate reconstructions, we propose that continental crust beneath southeast Iceland is part of ∼350-km-long and 70-km-wide extension of the Jan Mayen Microcontinent (JMM). The extended JMM was marginal to East Greenland but detached in the Early Eocene (between 52 and 47 Mya); by the Oligocene (27 Mya), all parts of the JMM permanently became part of the Eurasian plate following a westward ridge jump in the direction of the Iceland plume. PMID:25825769

  8. Continental crust beneath southeast Iceland.

    PubMed

    Torsvik, Trond H; Amundsen, Hans E F; Trønnes, Reidar G; Doubrovine, Pavel V; Gaina, Carmen; Kusznir, Nick J; Steinberger, Bernhard; Corfu, Fernando; Ashwal, Lewis D; Griffin, William L; Werner, Stephanie C; Jamtveit, Bjørn

    2015-04-14

    The magmatic activity (0-16 Ma) in Iceland is linked to a deep mantle plume that has been active for the past 62 My. Icelandic and northeast Atlantic basalts contain variable proportions of two enriched components, interpreted as recycled oceanic crust supplied by the plume, and subcontinental lithospheric mantle derived from the nearby continental margins. A restricted area in southeast Iceland--and especially the Öræfajökull volcano--is characterized by a unique enriched-mantle component (EM2-like) with elevated (87)Sr/(86)Sr and (207)Pb/(204)Pb. Here, we demonstrate through modeling of Sr-Nd-Pb abundances and isotope ratios that the primitive Öræfajökull melts could have assimilated 2-6% of underlying continental crust before differentiating to more evolved melts. From inversion of gravity anomaly data (crustal thickness), analysis of regional magnetic data, and plate reconstructions, we propose that continental crust beneath southeast Iceland is part of ∼350-km-long and 70-km-wide extension of the Jan Mayen Microcontinent (JMM). The extended JMM was marginal to East Greenland but detached in the Early Eocene (between 52 and 47 Mya); by the Oligocene (27 Mya), all parts of the JMM permanently became part of the Eurasian plate following a westward ridge jump in the direction of the Iceland plume.

  9. Continental crust beneath southeast Iceland

    PubMed Central

    Torsvik, Trond H.; Amundsen, Hans E. F.; Trønnes, Reidar G.; Doubrovine, Pavel V.; Gaina, Carmen; Kusznir, Nick J.; Steinberger, Bernhard; Corfu, Fernando; Ashwal, Lewis D.; Griffin, William L.; Werner, Stephanie C.; Jamtveit, Bjørn

    2015-01-01

    The magmatic activity (0–16 Ma) in Iceland is linked to a deep mantle plume that has been active for the past 62 My. Icelandic and northeast Atlantic basalts contain variable proportions of two enriched components, interpreted as recycled oceanic crust supplied by the plume, and subcontinental lithospheric mantle derived from the nearby continental margins. A restricted area in southeast Iceland—and especially the Öræfajökull volcano—is characterized by a unique enriched-mantle component (EM2-like) with elevated 87Sr/86Sr and 207Pb/204Pb. Here, we demonstrate through modeling of Sr–Nd–Pb abundances and isotope ratios that the primitive Öræfajökull melts could have assimilated 2–6% of underlying continental crust before differentiating to more evolved melts. From inversion of gravity anomaly data (crustal thickness), analysis of regional magnetic data, and plate reconstructions, we propose that continental crust beneath southeast Iceland is part of ∼350-km-long and 70-km-wide extension of the Jan Mayen Microcontinent (JMM). The extended JMM was marginal to East Greenland but detached in the Early Eocene (between 52 and 47 Mya); by the Oligocene (27 Mya), all parts of the JMM permanently became part of the Eurasian plate following a westward ridge jump in the direction of the Iceland plume. PMID:25825769

  10. Seamonster: A Smart Sensor Web in Southeast Alaska

    NASA Astrophysics Data System (ADS)

    Fatland, D. R.; Heavner, M. J.; Hood, E.; Connor, C.; Nagorski, S.

    2006-12-01

    The NASA Research Opportunities in Space and Earth Science (ROSES) program is supporting a wireless sensor network project as part of its Advanced Information Systems Technology "Smart Sensor Web" initiative. The project, entitled Seamonster (for SouthEast Alaska MONitoring Network for Science, Telecomm, and Education Research) is led by the University of Alaska Southeast (Juneau) in collaboration with Microsoft- Vexcel in Boulder Colorado. This paper describes both the data acquisition components and science research objectives of Seamonster. The underlying data acquisition concept is to facilitate geophysics data acquisition by providing a wireless backbone for data recovery. Other researchers would be encouraged to emplace their own sensors together with short-range wireless (ZigBee, Bluetooth, etc). Through a common protocol the backbone will receive data from these sensors and relay them to a wired server. This means that the investigator can receive their data via email on a daily basis thereby cutting cost and monitoring sensor health. With environmental hardening and fairly high bandwidth and long range (100kbps/50km to 5mpbs/15km per hop) the network is intended to cover large areas and operate in harsh environments. Low power sensors and intelligent power management within the backbone are the dual ideas to contend with typical power/cost/data dilemmas. Seamonster science will focus over the next three years on hydrology and glaciology in a succession of valleys near Juneau in various stages of deglaciation, in effect providing a synopsis of a millennium-timescale process in a single moment. The instrumentation will include GPS, geophones, digital photography, met stations, and a suite of stream state and water quality sensors. Initial focus is on the Lemon Creek watershed with expansion to follow in subsequent years. The project will ideally expand to include marine and biological monitoring components.

  11. 78 FR 29321 - Colorado Recreation Resource Advisory Committee Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-20

    ... Forest Service Colorado Recreation Resource Advisory Committee Meeting AGENCY: Rocky Mountain Region, Forest Service, USDA. ACTION: Notice of meeting. SUMMARY: The Colorado Recreation Resource Advisory... National Forest. Proposals, updates, and other information can be found on the Colorado Recreation...

  12. Ready for College in Colorado: Evaluation of the Colorado SUN and the College Connection Program

    ERIC Educational Resources Information Center

    Bragg, Debra D.

    2010-01-01

    In fall 2007, the state of Colorado received one of four federal grants from the Ready for College (RFC) grant program of the Office of Vocational and Adult Education (OVAE), U.S. Department of Education. The Colorado (CO) SUN project (where SUN stands for Success UNlimited) was designed to identify and enhance innovative practices from Colorado's…

  13. Colorado Preschool Project. Progress Report: Year 1. A Report to the Colorado General Assembly. Executive Summary.

    ERIC Educational Resources Information Center

    Edmiaston, Rebecca; And Others

    By creating the Colorado Preschool Program (CPP) in 1988, the Colorado General Assembly responded to the needs of 4- and 5-year-old children who are at risk of educational failure in Colorado. This paper is an executive summary of a report to the state's general assembly on the project's first 6 months of progress. The CPP addresses two critical…

  14. 78 FR 9629 - Irish Potatoes Grown in Colorado; Reestablishment of Membership on the Colorado Potato...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-11

    ...; ] DEPARTMENT OF AGRICULTURE Agricultural Marketing Service 7 CFR Part 948 Irish Potatoes Grown in Colorado; Reestablishment of Membership on the Colorado Potato Administrative Committee, Area No. 2 AGENCY: Agricultural... membership on the Colorado Potato Administrative Committee, Area No. 2 (Committee). The Committee...

  15. 2011 Kids Count in Colorado! The Impact of the Great Recession on Colorado's Children

    ERIC Educational Resources Information Center

    Colorado Children's Campaign, 2011

    2011-01-01

    "Kids Count in Colorado!" is an annual publication of the Colorado Children's Campaign, which provides the best available state- and county-level data to measure and track the education, health and general well-being of the state's children. "Kids Count in Colorado!" informs policy debates and community discussions, serving as a valuable resource…

  16. La Memoria De Nuestra Tierra: Colorado

    ERIC Educational Resources Information Center

    Baca, Judy

    2005-01-01

    La Memoria de Nuestra Tierra combines a meticulously hand-painted landscape with historic photographs in a seamless blend imprinted on the holographic-like surface of a metallic coated substrate. The mural for the Denver International Airport, entitled La Memoria de Nuestra Tierra is a breakthrough in digital murals, printed digitally on a…

  17. 40 CFR 81.306 - Colorado.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... affecting § 81.306 see the List of CFR Sections Affected which appears in the Finding Aids section of the...-Boulder-Greeley-Ft. Collins-Love) area where it is revoked effective November 20, 2008. Colorado—PM-10.../classification Date 1 Type Denver-Boulder-Greeley-Ft. Collins-Love., CO: Adams County (2) Nonattainment...

  18. 1. VIEW OF BUILDING 883 EXTERIOR, LOOKING SOUTHEAST. VENTILATION EQUIPMENT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. VIEW OF BUILDING 883 EXTERIOR, LOOKING SOUTHEAST. VENTILATION EQUIPMENT IS VISIBLE. (11/27/56) - Rocky Flats Plant, Uranium Rolling & Forming Operations, Southeast section of plant, southeast quadrant of intersection of Central Avenue & Eighth Street, Golden, Jefferson County, CO

  19. BISA/Bibliographic Information on Southeast Asia.

    ERIC Educational Resources Information Center

    Sydney Univ. (Australia).

    This document outlines the Bibliographic Information on Southeast Asia data bases (BISA), a project that has been established to provide greater access to and utilization of Australian library resources on Southeast Asia. The nine sections of the report cover BISA's objectives; the project's justification, which considers Australian holdings,…

  20. Higher Education in South-East Asia

    ERIC Educational Resources Information Center

    Online Submission, 2006

    2006-01-01

    South-East Asia is a region of vast development diversity but also many commonalities. And the development of higher education in the region, stemmed from its different historical background is changing rapidly towards their respective socio-economic needs. The publication is a joint research study by UNESCO Bangkok and Southeast Asian Ministers…

  1. Computers in Schools of Southeast Texas.

    ERIC Educational Resources Information Center

    Renfrow, Raylene; Henderson, David L.

    This study determined the prominent brands of microcomputers presently in use in Southeast Texas schools, the reasons for their selection, and computer use and brands in relation to grade level. Questionnaires related to microcomputer use were sent to 115 school districts in southeast Texas in 1985. The return rate was 83 percent. A total of 8,258…

  2. RIVERSIDE AVE. FROM SOUTH, SOUTHEAST OF BUILDINGS #433 SHOWING BUILDINGS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    RIVERSIDE AVE. FROM SOUTH, SOUTHEAST OF BUILDINGS #433 SHOWING BUILDINGS #434 AND #435, LOOKING EAST-SOUTHEAST - Fort Leavenworth, Metropolitan Avenue & Seventh Street, Leavenworth, Leavenworth County, KS

  3. Detail of door on southeast elevation. View to northwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail of door on southeast elevation. View to northwest - Flint Creek Hydroelectric Project, Powerhouse, Approximately 3 miles southeast of Porters Corner on Powerhouse Road, Philipsburg, Granite County, MT

  4. 1. Southeast elevation of Oil House showing loading platform. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Southeast elevation of Oil House showing loading platform. - Delaware, Lackawanna & Western Railroad, Scranton Yards, Oil House, 650 feet Southeast of Cliff & Mechanic Streets, Scranton, Lackawanna County, PA

  5. 8. STATION 'L' FROM SOUTHEAST DIVISION STREET LOOKING NORTHWEST, LINCOLN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. STATION 'L' FROM SOUTHEAST DIVISION STREET LOOKING NORTHWEST, LINCOLN SUBSTATION IN FOREGROUND - Portland General Electric Company, Station "L", 1841 Southeast Water Street, Portland, Multnomah County, OR

  6. 9. STATION 'L', LOOKING NORTHWEST FROM SOUTHEAST DIVISION, LINCOLN SUBSTATION ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. STATION 'L', LOOKING NORTHWEST FROM SOUTHEAST DIVISION, LINCOLN SUBSTATION IN FOREGROUND - Portland General Electric Company, Station "L", 1841 Southeast Water Street, Portland, Multnomah County, OR

  7. Habitat Metro Denver -- Perfecting Award-Winning Affordable Homes Using Building America's Integrated Design Approach; Building America (Brochure)

    SciTech Connect

    2004-12-01

    Habitat for Humanity’s goal is to supply quality housing to poor families while reducing their energy cost burden, especially in light of ever-increasing energy prices. Habitat Metro Denver partnered with the U.S. Department of Energy’s Building America P

  8. Developmental Screenings in Rural Settings: A Comparison of the Child Development Review and the Denver II Developmental Screening Test.

    ERIC Educational Resources Information Center

    Brachlow, Allison; Jordan, Augustus E.; Tervo, Raymond

    2001-01-01

    Two developmental screening tests were applied to 73 children, aged 1 month-6.7 years, in Sioux Falls and the Cheyenne River Reservation (South Dakota). There were no racial differences; compared to urban children, rural reservation children of any race were more likely to pass the Child Development Review and to fail the Denver II Developmental…

  9. A Direct Measurement Study of Air Emissions from Oil & Natural Gas Production Pads in the Denver-Julesburg Basin

    EPA Science Inventory

    EPA and industry cooperators conducted a one-week emission measurement study of 23 oil and natural gas well pads in the Denver-Julesburg Basin in July, 2011. The purpose of the study was to characterize emissions from individual production components and to evaluate the performa...

  10. Teaching Young Nonverbal Children with Autism Useful Speech: A Pilot Study of the Denver Model and PROMPT Interventions

    ERIC Educational Resources Information Center

    Rogers, Sally J.; Hayden, Deborah; Hepburn, Susan; Charlifue-Smith, Renee; Hall, Terry; Hayes, Athena

    2006-01-01

    This single subject design study examined two models of intervention: Denver Model (which merges behavioral, developmental, and relationship-oriented intervention), and PROMPT (a neuro-developmental approach for speech production disorders). Ten young, nonverbal children with autism were matched in pairs and randomized to treatment. They received…

  11. The Southeast Stream Quality Assessment

    USGS Publications Warehouse

    Van Metre, Peter C.; Journey, Celeste A.

    2014-01-01

    In 2014, the U.S. Geological Survey (USGS) National Water-Quality Assessment Program (NAWQA) is assessing stream quality across the Piedmont and southern Appalachian Mountains in the southeastern United States. The goal of the Southeast Stream Quality Assessment (SESQA) is to characterize multiple water-quality factors that are stressors to aquatic life—contaminants, nutrients, sediment, and streamflow alteration—and the relation of these stressors to ecological conditions in streams throughout the region. Findings will provide communities and policymakers with information on which human and environmental factors are the most critical in controlling stream quality and, thus, provide insights about possible approaches to protect or improve stream quality. The SESQA study will be the second regional study by the NAWQA program, and it will be of similar design and scope as the Midwest Stream Quality Assessment conducted in 2013 (Van Metre and others, 2012).

  12. Southeast U.S. burns

    NASA Astrophysics Data System (ADS)

    Maggs, William Ward

    Human beings were responsible for most of 12,000 forest fires in the southeastern United States that burned for 10 days in late October and early November 1987. 910 km2, mostly hardwood forest, were destroyed in the fires, with arson and carelessness as the primary causes, according to the U.S. Department of Agriculture Forest Service.Measured in monetary terms, the toll was more than $40 million in resource and property damage. While the amount of forest burned did not rival the 3390 km2 lost to fires in the western United States last summer, the human impact was severe in the southeast and all along the East Coast. Favorable winds blew smoke from the southern and central Appalachians as far north as New England and as far east as Delaware, and cool fall air close to the ground prevented the smoke from rising, thickening the air in many northeastern cities on November 8 and 9.

  13. East and Southeast Asia assessment.

    PubMed

    Suyono, H

    1984-06-01

    The people of East and Southeast Asia, despite societal differences and varied economic successes, share 1 cultural value, i.e., the love of children and the importance of family. The small family norms espoused by family planning programs, the goal in some nations of 1- or 2-child families, the concept that 2 children are enough regardless of their sex -- all these ideas contradict the basic cultural appreciation for children in most countries and the preference for sons in many. Yet, demographic realities give Asia no alternative. It is necessary to work against cultural values to increase the opportunities for individuals, their families, their countries, and the region as a whole. All the countries of this region have had family planning programs since at least the 1970s, and some have been very successful. It may be well into the 21st century before the populations of most East and Southeast countries stabilize. Stabilization will take longer for those countries which are without successful family planning policies and programs. Each national family planning program requires the full and positive political and financial commitment of its government. Programs also need the freedom to try all new approaches. The appropriateness and acceptability of a particular mehtod should be decided by program managers and personnel in consultation with potential users, rather than by politicians. Future family planning programs will need to be even more innovative. Family planning service delivery must be brought closer to the client so it will be available in all communities and work places and at all potential public and private places. Other basic services such as nutrition, income-generating schemes, and general and maternal/child health must be integrated into the programs. The responsibility for managing programs must be assumed by the community in order to create a very strong and broad base of national commitment.

  14. Journalism and Academic Surgery: The Denver Post and The American Surgeon.

    PubMed

    Nakayama, Don K

    2015-07-01

    Publication in professional journals is where advancements in surgery are reported and verified. Thus academic surgery holds common ground with journalism, where the principles of service, communication, and integrity are the basis of their public trust and standing in society. Writing for the Denver Post the author learned lessons that are relevant to academic surgery. Facts have to be solid. There are important issues to be discussed. Articles have to be interesting and not tiresome to read. And if it's something new--the essence of news--get it out there first. The American Surgeon embodies the same principles. The journal is a place where members of the Southeastern Surgical Congress discuss important matters, like surgical education, and share stories of interest, like a Japanese surgeon trying to treat victims of nuclear war. It is accessible yet disciplined, dedicated to advancing our field and fostering fellowship and communication among its members.

  15. Evaluation of Fast-Time Wake Models Using Denver 2006 Field Experiment Data

    NASA Technical Reports Server (NTRS)

    Ahmad, Nash’at N.; Pruis, Matthew J.

    2015-01-01

    The National Aeronautics and Space Administration conducted a series of wake vortex field experiments at Denver in 2003, 2005, and 2006. This paper describes the lidar wake vortex measurements and associated meteorological data collected during the 2006 deployment, and includes results of recent reprocessing of the lidar data using a new wake vortex algorithm and estimates of the atmospheric turbulence using a new algorithm to estimate eddy dissipation rate from the lidar data. The configuration and set-up of the 2006 field experiment allowed out-of-ground effect vortices to be tracked in lateral transport further than any previous campaign and thereby provides an opportunity to study long-lived wake vortices in moderate to low crosswinds. An evaluation of NASA's fast-time wake vortex transport and decay models using the dataset shows similar performance as previous studies using other field data.

  16. Magnetic and GPR surveys of a former munitions foundry site at the Denver Federal Center

    USGS Publications Warehouse

    Campbell, David L.; Beanland, Shay; Lucius, Jeffrey E.; Powers, Michael H.

    2000-01-01

    We made magnetometer and ground penetrating radar (GPR) surveys over part of the foundation of a World War II-era foundry located on the Denver Federal Center. The site contains a number of highly magnetic source bodies, concrete foundation walls, and underground openings, buried under a clay cap. The cap is several feet thick and has a conductivity of about 35 mS/m, making the features underneath it a poor target for conventional GPR. Indeed, the raw data look unlike typical GPR data, but rather show reverberation (?) bands under sidewalks and other shallow buried sources. Using a newly-written computer package, we made plan maps of the GPR response at different time slices. The sliced GPR data did not outline buried foundry foundations, as we had hoped it might. The resulting plan maps of the sliced data show sidewalks and other blobby features, some of which correspond to magnetometer highs.

  17. Carbon Sequestration and Energy Balance of Turf in the Denver Urban Ecosystem and Adjacent Tallgrass Prairie

    NASA Astrophysics Data System (ADS)

    Thienelt, T.; Anderson, D. E.; Powell, K. M.

    2012-12-01

    Urban ecosystems are currently characterized by rapid growth and are expected to continually expand. They represent an important driver of land use change. A significant component of urban ecosystems is lawns, potentially the single largest irrigated "crop" in the U.S. Between March and October of 2011 and 2012, eddy covariance measurements of net carbon dioxide exchange and evapotranspiration along with energy balance fluxes were conducted for an irrigated, fertilized lawn (rye-bluegrass-mix) in metropolitan Denver and for a nearby tallgrass prairie (big bluestem, switchgrass, cheatgrass, blue grama). Due to the semi-arid climate conditions of the Denver region, differences in management (i.e., irrigation and fertilization) are expected to have a discernible impact on ecosystem productivity and thus on carbon sequestration rates, evapotranspiration, and the partitioning of sensible and latent heat. Data for the 2011 season showed that cumulative evapotranspiration was approximately 600 mm for the urban lawn and 305 mm for the tallgrass prairie; cumulative carbon sequestration was calculated to be 172 and 85 g C/m2, respectively. Also, patterns of carbon exchange differed between the grasslands. In 2011, both sites showed daily net uptake of carbon starting in late May, but the urban lawn displayed greater diurnal variability as well as greater uptake rates in general, especially following fertilization in mid-June. In contrast, the trend of carbon uptake at the prairie site was occasionally reversed following strong convective precipitation events, resulting in a temporary net release of carbon. Preliminary data for the 2012 season (up to early July) indicated an earlier start of net carbon uptake and higher cumulative evapotranspiration for both locations, likely due to a warm spring. The continuing acquisition of data and investigation of these relations will help assess the potential impact of urban growth on regional carbon sequestration.

  18. Temporal patterns in daily measurements of inorganic and organic speciated PM2.5 in Denver

    PubMed Central

    Dutton, Steven J.; Rajagopalan, Balaji; Vedal, Sverre; Hannigan, Michael P.

    2013-01-01

    Airborne particulate matter less than 2.5 μm in aerodynamic diameter (PM2.5) has been linked to a wide range of adverse health effects and as a result is currently regulated by the U.S. Environmental Protection Agency. PM2.5 originates from a multitude of sources and has heterogeneous physical and chemical characteristics. These features complicate the link between PM2.5 emission sources, ambient concentrations and health effects. The goal of the Denver Aerosol Sources and Health (DASH) study is to investigate associations between sources and health using daily measurements of speciated PM2.5 in Denver. The datxa set being collected for the DASH study will be the longest daily speciated PM2.5 data set of its kind covering 5.5 years of daily inorganic and organic speciated measurements. As of 2008, 4.5 years of bulk measurements (mass, inorganic ions and total carbon) and 1.5 years of organic molecular marker measurements have been completed. Several techniques were used to reveal long-term and short-term temporal patterns in the bulk species and the organic molecular marker species. All species showed a strong annual periodicity, but their monthly and seasonal behavior varied substantially. Weekly periodicities appear in many compound classes with the most significant weekday/weekend effect observed for elemental carbon, cholestanes, hopanes, select polycyclic aromatic hydrocarbons (PAHs), heavy n-alkanoic acids and methoxyphenols. Many of the observed patterns can be explained by meteorology or anthropogenic activity patterns while others do not appear to have such obvious explanations. Similarities and differences in these findings compared to those reported from other cities are highlighted. PMID:23486844

  19. Behavioral Disorder amongst Adolescents Attending Secondary School in Southeast Nigeria

    PubMed Central

    Chinawa, J. M.; Manyike, P. C.; Obu, H. A.; Odetunde, O. I.; Aniwada, E. C.; Ndu, I. K.; Chinawa, A. T.

    2014-01-01

    Background. Adolescents are prone to various forms of behavioral problems. These behavioral issues in adolescents can have serious consequences for the adolescents. Objectives. The objectives of the study are to determine the causative factors of adolescent problems and specific manifestations. Methods. Behavioral problems were investigated using a random sampling of adolescents from secondary schools in southeast Nigeria from February to April, 2014. A self-administered questionnaire was developed from Health Kids Colorado Questionnaire. Results. A total of 763 subjects completed the questionnaire. Adolescents who reported to have used tobacco 3 to 5 and 6 to 9 times during the last 30 days are just 3.14% and 3.4%, respectively. Nineteen (2.49%) adolescents claimed that they have had sex before but not in the last 3 months. Adolescents who attempted suicide are from 15 years and peaked at 18. Eighty-three (11%) adolescents who are 15 years old attempted suicide in a year; this peaks at 17 years where 235 (30.8%) committed suicide. Majority of adolescents with behavioral disorder are from the upper class family. Conclusion. This study revealed that adolescents exhibit several forms of behavioral problems. PMID:25276048

  20. Colorado economic impact study on the Uranium Mill Tailings Remedial Action Project in Colorado: Colorado state fiscal year 1993

    SciTech Connect

    Not Available

    1993-11-12

    The Colorado economic impact study summarizes employment and economic benefits to the state from activities associated with the Uranium Mill Tailings Remedial Action (UMTRA) Project during Colorado state fiscal year (FY) 1993. To capture employment benefits, a questionnaire was distributed to subcontractor employees at the active UMTRA Project sites of Grand Junction, Rifle, and Gunnison, Colorado. An estimated 52 percent of the employees working on the UMTRA Project responded to this information request. Economic data were requested from each prime subcontractor, as well as from the Remedial Action Contractor. The most significant benefits associated with the UMTRA Project in Colorado are: Direct employment was estimated at 894 workers; An estimated 89 percent of all direct employment was local; Secondary employment resulting from remedial action at the active Colorado UMTRA Project sites and the Grand Junction vicinity property program is estimated at 546 workers. Total employment (direct and secondary) is estimated at 1440 workers for the period of study (July 1, 1992, to June 30, 1993). An estimated $24.1 million was paid in wages to UMTRA workers in Colorado during FY1993; Direct and secondary wage earnings were estimated at $39.9 million; Income tax payments to the state of Colorado were estimated at $843,400 during FY1993; The gross economic impact of UMTRA Project activities in the state of Colorado is estimated at $70 million during the 1-year study period; and the net economic benefit to the state of Colorado was estimated at $57.5 million, or $5.90 per dollar of funding provided by Colorado. This figure includes both direct and secondary benefits but does not include the impact of alternative uses of the state funding.

  1. Colorado: Youth Risk Behavior Survey, 1991.

    ERIC Educational Resources Information Center

    Colorado Univ. Health Sciences Center, Denver.

    In April 1991, the Youth Risk Behavior Survey was administered to a sample of 1,412 high school students in Colorado public schools to collect information about priority health-risk behaviors among adolescents. Questionnaires were received from 1,170 students, a response rate of 83%. Classes in Colorado's 280 public schools were also selected to…

  2. 2013 Kids Count in Colorado! Community Matters

    ERIC Educational Resources Information Center

    Colorado Children's Campaign, 2013

    2013-01-01

    "Kids Count in Colorado!" is an annual publication of the Children's Campaign, providing state and county level data on child well-being factors including child health, education, and economic status. Since its first release 20 years ago, "Kids Count in Colorado!" has become the most trusted source for data and information on…

  3. COLORADO MIGRANT MINISTRY. ANNUAL REPORT, 1961.

    ERIC Educational Resources Information Center

    1961

    MIGRANTS WERE AIDED BY THE COLORADO MIGRANT MINISTRY, WHICH WITH PUBLIC SCHOOL OFFICALS AND HEALTH AND WELFARE AGENCY PERSONNEL, HELPED TO DETERMINE LEGISLATIVE NEEDS, AND PROVIDED DIRECT SERVICES TO MIGRANTS IN THREE AREAS OF COLORADO. IN ROCKY FORD, A SPANISH-SPEAKING EDUCATED HUSBAND-WIFE-DAUGHTER TEAM WORKED WITH VARIOUS GROUPS WHO LED…

  4. The Colorado Scale-Model Solar System.

    ERIC Educational Resources Information Center

    Bennett, Jeffrey O.; And Others

    1991-01-01

    Describes the Colorado Scale-Model Solar System, a display illustrating the sizes and distances to the Sun and the nine planets on the campus of Colorado University. Discusses the model's educational value and uses for the classroom and the community. (MDH)

  5. 33 CFR 117.963 - Colorado River.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Colorado River. 117.963 Section 117.963 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Texas § 117.963 Colorado River. The draw of...

  6. 33 CFR 117.963 - Colorado River.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Colorado River. 117.963 Section 117.963 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Texas § 117.963 Colorado River. The draw of...

  7. 33 CFR 117.963 - Colorado River.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Colorado River. 117.963 Section 117.963 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Texas § 117.963 Colorado River. The draw of...

  8. 33 CFR 117.963 - Colorado River.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Colorado River. 117.963 Section 117.963 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Texas § 117.963 Colorado River. The draw of...

  9. 33 CFR 117.963 - Colorado River.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Colorado River. 117.963 Section 117.963 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Texas § 117.963 Colorado River. The draw of...

  10. Healthy Child Care Colorado, 2002: Outcome Evaluation.

    ERIC Educational Resources Information Center

    Eliot, Susan

    This report describes the impact of nurse consultant services to child care programs in Colorado on the children, parents, and staff of the centers they serve as part of the Healthy Child Care Colorado (HCCC) initiative. Study participants included 25 child care center directors and 24 nurse consultants, representing large and small centers in…

  11. Selenium impacts on razorback sucker, Colorado: Colorado River: III. Larvae

    USGS Publications Warehouse

    Hamilton, S.J.; Holley, K.M.; Buhl, K.J.; Bullard, F.A.

    2005-01-01

    Razorback sucker (Xyrauchen texanus) larvae from adults exposed to selenium at three sites near Grand Junction, Colorado, for 9 months were used in a 30-day waterborne and dietary selenium study. Selenium concentrations in water averaged <1.6 ??g/L from 24-Road, 0.9 ??g/L from Horsethief, 5.5 ??g/L from Adobe Creek, and 10.7 ??g/L from the North Pond. Selenium in dietary items averaged 2.7 ??g/g in brine shrimp, 5.6 ??g/g in zooplankton from Horsethief east wetland, 20 ??g/g in zooplankton from Adobe Creek, and 39 ??g/g in zooplankton from North Pond. The lowest survival occurred in larvae fed zooplankton rather than brine shrimp. Survival of larvae at Adobe Creek and North Pond was lower in site water than in reference water. Survival of brood stock larvae was higher than Horsethief larvae even though they received the same water and dietary treatments. Arsenic concentrations in brine shrimp may have resulted in an antagonistic interaction with selenium and reduced adverse effects in larvae. Deformities in larvae from North Pond were similar to those reported for selenium-induced teratogenic deformities in other fish species. Selenium concentrations of ???4.6 ??g/g in food resulted in rapid mortality of larvae from Horsethief, Adobe Creek, and North Pond, and suggested that selenium toxicity in the Colorado River could limit recovery of this endangered fish.

  12. Selenium impacts on razorback sucker, Colorado River, Colorado: II. Eggs

    USGS Publications Warehouse

    Hamilton, S.J.; Holley, K.M.; Buhl, K.J.; Bullard, F.A.

    2005-01-01

    Effects on hatching and development of fertilized eggs in adult razorback sucker (Xyrauchen texanus) exposed to selenium in flooded bottomland sites near Grand Junction, Colorado, were determined. After 9 months exposure, fish were collected and induced to spawn and eggs collected for inorganic element analyses. A 9-day egg study was conducted with five spawns from Horsethief ponds, six spawns from Adobe Creek channel, and four spawns from North Pond using a reference water and site waters. Selenium concentrations in eggs were 6.5 ??g/g from Horsethief, 46 ??g/g from Adobe Creek, 38 ??g/g from North Pond, and 6.0 ??g/g from brood stock. Eggs from young adults had a smaller diameter and higher moisture content than brood stock. There were no differences among the four sources in viability, survival, hatch, hatchability, or mortality of deformed embryos or larvae. Adobe Creek larvae had more deformed embryos in eggs held in site water than held in reference water. There were significant negative correlations between selenium concentrations in adult muscle plugs and percent hatch, egg diameter, and deformities in embryos. Results from this study suggest that selenium contamination in parts of the upper basin of the Colorado River should be a major concern to recovery efforts for endangered fish.

  13. Selenium impacts on razorback sucker, Colorado: Colorado River III. Larvae.

    PubMed

    Hamilton, Steven J; Holley, Kathy M; Buhl, Kevin J; Bullard, Fern A

    2005-06-01

    Razorback sucker (Xyrauchen texanus) larvae from adults exposed to selenium at three sites near Grand Junction, Colorado, for 9 months were used in a 30-day waterborne and dietary selenium study. Selenium concentrations in water averaged <1.6 microg/L from 24-Road, 0.9 microg/L from Horsethief, 5.5 microg/L from Adobe Creek, and 10.7 microg/L from the North Pond. Selenium in dietary items averaged 2.7 microg/g in brine shrimp, 5.6 microg/g in zooplankton from Horsethief east wetland, 20 microg/g in zooplankton from Adobe Creek, and 39 microg/g in zooplankton from North Pond. The lowest survival occurred in larvae fed zooplankton rather than brine shrimp. Survival of larvae at Adobe Creek and North Pond was lower in site water than in reference water. Survival of brood stock larvae was higher than Horsethief larvae even though they received the same water and dietary treatments. Arsenic concentrations in brine shrimp may have resulted in an antagonistic interaction with selenium and reduced adverse effects in larvae. Deformities in larvae from North Pond were similar to those reported for selenium-induced teratogenic deformities in other fish species. Selenium concentrations of 4.6 microg/g in food resulted in rapid mortality of larvae from Horsethief, Adobe Creek, and North Pond, and suggested that selenium toxicity in the Colorado River could limit recovery of this endangered fish.

  14. Selenium impacts on razorback sucker, Colorado: Colorado River III. Larvae.

    PubMed

    Hamilton, Steven J; Holley, Kathy M; Buhl, Kevin J; Bullard, Fern A

    2005-06-01

    Razorback sucker (Xyrauchen texanus) larvae from adults exposed to selenium at three sites near Grand Junction, Colorado, for 9 months were used in a 30-day waterborne and dietary selenium study. Selenium concentrations in water averaged <1.6 microg/L from 24-Road, 0.9 microg/L from Horsethief, 5.5 microg/L from Adobe Creek, and 10.7 microg/L from the North Pond. Selenium in dietary items averaged 2.7 microg/g in brine shrimp, 5.6 microg/g in zooplankton from Horsethief east wetland, 20 microg/g in zooplankton from Adobe Creek, and 39 microg/g in zooplankton from North Pond. The lowest survival occurred in larvae fed zooplankton rather than brine shrimp. Survival of larvae at Adobe Creek and North Pond was lower in site water than in reference water. Survival of brood stock larvae was higher than Horsethief larvae even though they received the same water and dietary treatments. Arsenic concentrations in brine shrimp may have resulted in an antagonistic interaction with selenium and reduced adverse effects in larvae. Deformities in larvae from North Pond were similar to those reported for selenium-induced teratogenic deformities in other fish species. Selenium concentrations of 4.6 microg/g in food resulted in rapid mortality of larvae from Horsethief, Adobe Creek, and North Pond, and suggested that selenium toxicity in the Colorado River could limit recovery of this endangered fish. PMID:15883090

  15. Paleomagnetism of clastic dikes along the Front Range, Colorado

    NASA Astrophysics Data System (ADS)

    Dulin, S. A.; Elmore, R. D.

    2011-12-01

    Numerous clastic dikes occur within the Proterozoic basement along nearly 75km of the Front Range of Colorado. These dikes are composed predominately of well-rounded, non-metamorphosed quartz and are red in color due to the abundance of authigenic hematite. The Cambrian Sawatch sandstone is assumed by most studies to be the source of dike sediments due to its similar composition. Despite over a century of study, the origins, age, and emplacement mechanisms of these dikes remain enigmatic. A preliminary paleomagnetic study of the clastic dikes using standard demagnetization techniques indicates the presence of a complex multicomponent magnetization with at least three components. An easterly and moderately steep component residing in hematite was resolved from several dikes and corresponds to an early Cambrian pole position when compared to the apparent polar wander path of North America. An east-southeasterly and shallow magnetization, also residing in hematite, yields a pole of early Paleozoic age. The third component is northwesterly and steep down and is Mesozoic or Cenozoic in age. These results are similar to a previous paleomagnetic study (Kost, MS thesis, Univ. Colorado) in 1984 of different dikes which found poorly defined early and late Paleozoic, as well as Mesozoic-Cenozoic components. Many researchers suggest emplacement occurred during faulting that was associated with either the Ancestral Rockies uplift of the late Paleozoic or the Laramide orogeny of the late Mesozoic/early Cenozoic. The presence of magnetizations of Cambrian age, with subsequent younger remagnetizations, indicates that the emplacement of many of the dikes preceded both of these tectonic events.

  16. Detrital Zircon Record of Colorado River Incision

    NASA Astrophysics Data System (ADS)

    Kimbrough, D.; Grove, M.; Gehrels, G.; Dorsey, R.; House, K. P.; Howard, K.; Pearthree, P. A.; Spencer, J. E.; Mahoney, B.

    2007-05-01

    The Colorado River is a large, youthful, unequilibrated continental drainage system the base-level for which was established rather abruptly between 5 and 6 million years ago in conjunction with Gulf of California rifting and establishment of the modern river course through the western Grand Canyon and lower Colorado river region. New laser ablation ICPMS detrital zircon U-Pb analyses (~3000) from ~40 samples provide insight into details relating to the cause, timing and consequences of river inception. These samples encompass (1) the modern Colorado River delta, (2) major tributaries including the Green, "Grand", San Juan, Little Colorado and Gila rivers (3) late Miocene to Pliocene sediments along the lower Colorado (4) late Miocene to Pleistocene deltaic and fluvial sediments of the Imperial and Palm Spring Groups in the western Salton Trough, and (5) late Miocene- early Pliocene Bidahochi Formation of eastern Arizona. Data from the western Salton Trough and modern delta yield strata yield remarkably homogeneous age distributions that indicate there was little evolution in Colorado River sediment composition since 5.3 Ma. Detrital zircon is dominated by a mix of local southwest US cratonal basement (1.7 and 1.4 Ga) plus reworked supracrustal sequences of the Colorado Plateau that provide Neoproterozoic, 1.1 Ga, and early Paleozoic zircons. A relative paucity of Grenville-age grains in the earliest part of the delta sequence may reflect an early stage of the modern river prior to deep incision through Colorado Plateau erg deposits. The strong homogeneity of the detrital zircon record from late Miocene to the present is consistent with the `lake spillover model' for inception and integration of the modern Colorado River drainage. Abrupt integration of the lower Colorado River after 5.6 Ma is clearly recorded by detrital zircon ages from the laucustrine Bouse Formation and Bullhead alluvium aggradational package. Fluvial-laucustrine deposits of the Bidahochi

  17. The Southeast Asian Tin Belt

    NASA Astrophysics Data System (ADS)

    Schwartz, M. O.; Rajah, S. S.; Askury, A. K.; Putthapiban, P.; Djaswadi, S.

    1995-07-01

    The Southeast Asian Tin Belt is a north-south elongate zone 2800 km long and 400 km wide, extending from Burma (Myanmar) and Thailand to Peninsular Malaysia and the Indonesian Tin Islands. Altogether 9.6 million tonnes of tin, equivalent to 54% of the world's tin production is derived from this region. Most of the granitoids in the region can be grouped geographically into elongate provinces or belts, based on petrographic and geochronological features. - The Main Range Granitoid Province in western Peninsular Malaysia, southern Peninsular Thailand and central Thailand is almost entirely made up of biotite granite (184-230 Ma). Tin deposits associated with these granites contributed 55% of the historic tin production of Southeast Asia. - The Northern Granitoid Province in northern Thailand (0.1% of tin production) also has dominant biotite granite (200-269 Ma) but it is distinguished by abundant post-intrusion deformation. - The Eastern Granitoid Province extends from eastern Peninsular Malaysia to eastern Thailand. The Malaysian part is subdivided into the East Coast Belt (220-263 Ma), Boundary Range Belt (197-257 Ma) and Central Belt (79-219 Ma). The granitoids cover a wide compositional range from biotite granite to hornblende-biotite granite/granodiorite and diorite-gabbro. Tin deposits are associated with biotite granite in the East Coast Belt (3% of tin production). The granitoids in the other areas of the Eastern Granitoid Province are barren. - The Western Granitoid Province (22-149 Ma) in northern Peninsular Thailand, western Thailand and Burma has biotite granite and hornblende-biotite granite/granodiorite. Tin deposits are associated with biotite granite, which probably is the dominant phase (14% of tin production). The granitoids of the Indonesian Tin Islands (193-251 Ma) do not permit grouping into geographically distinct units. Main Range-type and Eastern Province-type plutons occur next to each other. Most of the tin deposits are associated with Main

  18. Energy Smart Colorado, Final Report

    SciTech Connect

    Gitchell, John M.; Palmer, Adam L.

    2014-03-31

    Energy Smart Colorado is an energy efficiency program established in 2011 in the central mountain region of Colorado. The program was funded through a grant of $4.9 million, awarded in August 2010 by the U.S. Department of Energy’s Better Buildings Program. As primary grant recipient, Eagle County coordinated program activities, managed the budget, and reported results. Eagle County staff worked closely with local community education and outreach partner Eagle Valley Alliance for Sustainability (now Walking Mountains Science Center) to engage residents in the program. Sub-recipients Pitkin County and Gunnison County assigned local implementation of the program in their regions to their respective community efficiency organizations, Community Office for Resource Efficiency (CORE) in Pitkin County, and Office for Resource Efficiency (ORE) in Gunnison County. Utility partners contributed $166,600 to support Home Energy Assessments for their customers. Program staff opened Energy Resource Centers, engaged a network of qualified contractors, developed a work-flow, an enrollment website, a loan program, and a data management system to track results.

  19. Mineral, chemical and textural relationships in rhythmic-bedded, hydrocarbon-productive chalk of the Niobrara Formation, Denver Basin, Colorado ( USA).

    USGS Publications Warehouse

    Pollastro, R.M.; Martinez, C.J.

    1985-01-01

    The types of hydrocarbons produced from these chalks are determined by the level of thermal maturity associated with present-day burial or paleoburial conditions. Detailed analyses of deeply-buried chalk from core of the Smoky Hill Chalk Member of the Niobrara Formation in the Champlin Petroleum 2 Boxelder Farms well combined with core data from other Niobrara wells have helped identify many depositional and diagenetic relationships. Porosity of the chalk is proportional to maximum burial depth and inversely proportional to the amount of non-carbonate material (acid- insoluble residue content) in the chalk. Total organic carbon content in the chalk is proportional to the amount of acid-insoluble residue and relative abundance of pyrite in the acid-insoluble fraction. Quartz is inversely proportional to the amount of insoluble material, and the amount of clay tends to increase as insolubles increase, suggesting that detritus in these chalks is greatly influenced by reworked, altered, volcanic products rather than siliceous clastics.-from Authors

  20. Renewable energy and occupational health and safety research directions: a white paper from the Energy Summit, Denver Colorado, April 11-13, 2011.

    PubMed

    Mulloy, Karen B; Sumner, Steven A; Rose, Cecile; Conway, George A; Reynolds, Stephen J; Davidson, Margaret E; Heidel, Donna S; Layde, Peter M

    2013-11-01

    Renewable energy production may offer advantages to human health by way of less pollution and fewer climate-change associated ill-health effects. Limited data suggests that renewable energy will also offer benefits to workers in the form of reduced occupational injury, illness and deaths. However, studies of worker safety and health in the industry are limited. The Mountain and Plains Education and Research Center (MAP ERC) Energy Summit held in April 2011 explored issues concerning worker health and safety in the renewable energy industry. The limited information on hazards of working in the renewable energy industry emphasizes the need for further research. Two basic approaches to guiding both prevention and future research should include: (1) applying lessons learned from other fields of occupational safety and health, particularly the extractive energy industry; and (2) utilizing knowledge of occupational hazards of specific materials and processes used in the renewable energy industry.