Sample records for spanning sandy river

  1. Sandy River Delta Habitat Restoration Project, Annual Report 2001.

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Kelly, Virginia; Dobson, Robin L.

    The Sandy River Delta is located at the confluence of the Sandy and Columbia Rivers, just east of Troutdale, Oregon. It comprises about 1,400 land acres north of Interstate 84, managed by the USDA Forest Service, and associated river banks managed by the Oregon Division of State Lands. Three islands, Gary, Flag and Catham, managed by Metro Greenspaces and the State of Oregon lie to the east, the Columbia River lies to the north and east, and the urbanized Portland metropolitan area lies to the west across the Sandy River. Sandy River Delta was historically a wooded, riparian wetland withmore » components of ponds, sloughs, bottomland woodland, oak woodland, prairie, and low and high elevation floodplain. It has been greatly altered by past agricultural practices and the Columbia River hydropower system. Restoration of historic landscape components is a primary goal for this land. The Forest Service is currently focusing on restoration of riparian forest and wetlands. Restoration of open upland areas (meadow/prairie) would follow substantial completion of the riparian and wetland restoration. The Sandy River Delta is a former pasture infested with reed canary grass, blackberry and thistle. The limited over story is native riparian species such as cottonwood and ash. The shrub and herbaceous layers are almost entirely non-native, invasive species. Native species have a difficult time naturally regenerating in the thick, competing reed canary grass, Himalayan blackberry and thistle. A system of drainage ditches installed by past owners drains water from historic wetlands. The original channel of the Sandy River was diked in the 1930's, and the river diverted into the ''Little Sandy River''. The original Sandy River channel has subsequently filled in and largely become a slough. The FS acquired approximately 1,400 acres Sandy River Delta (SRD) in 1991 from Reynolds Aluminum (via the Trust for Public Lands). The Delta had been grazed for many years but shortly after FS acquisition grazing was terminated while a master plan and Environmental Impact Statement (EIS) were developed for the site. During the following three years, the vegetation changed dramatically as a result of cessation of grazing. The dramatic changes included the explosive increases of reed canary grass monocultures in wet areas and the expansion of Himalayan blackberries throughout the site.« less

  2. 33 CFR 80.170 - Sandy Hook, NJ to Tom's River, NJ.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Sandy Hook, NJ to Tom's River, NJ. 80.170 Section 80.170 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY INTERNATIONAL NAVIGATION RULES COLREGS DEMARCATION LINES Atlantic Coast § 80.170 Sandy Hook, NJ to Tom's River...

  3. 78 FR 56650 - Boundary Description and Final Map for Sandy Wild and Scenic River, Upper Portion, Mount Hood...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-13

    ... DEPARTMENT OF AGRICULTURE Forest Service Boundary Description and Final Map for Sandy Wild and...: Notice of availability. SUMMARY: In accordance with section 3(b) of the Wild and Scenic Rivers Act, the... Sandy Wild and Scenic River, Upper Portion, to Congress. DATES: The boundaries and classification of the...

  4. DOE Office of Scientific and Technical Information (OSTI.GOV)

    Sather, NK; Johnson, GE; Storch, AJ

    The tidal freshwater monitoring (TFM) project reported herein is part of the research, monitoring, and evaluation effort developed by the Action Agencies (Bonneville Power Administration, the U.S. Army Corps of Engineers [USACE], and the U.S. Bureau of Reclamation) in response to obligations arising from the Endangered Species Act (ESA) as a result of operation of the Federal Columbia River Power System. The project is being performed under the auspices of the Northwest Power and Conservation Council's Columbia Basin Fish and Wildlife Program (Project No. 2005-001-00). The research is a collaborative effort among the Pacific Northwest National Laboratory, the Oregon Departmentmore » of Fish and Wildlife, the National Marine Fisheries Service, and the University of Washington. The overarching goal of the TFM project is to bridge the gap in knowledge between tidal freshwater habitats and the early life history attributes of migrating salmon. The research questions include: In what types of habitats within the tidal freshwater area of the Columbia River are juvenile salmon found, when are they present, and under what environmental conditions? What is the ecological contribution of shallow (0-5 m) tidal freshwater habitats to the recovery of ESA-listed salmon in the Columbia River basin? Field data collection for the TFM project commenced in June 2007 and since then has continued monthly at six to nine sites in the vicinity of the Sandy River delta (river kilometer 192-208). While this report includes summary data spanning the 19-month period of study from June 2007 through December 2008, it highlights sampling conducted during calendar year 2008. Detailed data for calendar year 2007 were reported previously. The 2008 research objectives were as follows: (1) Characterize the vegetation composition and percent cover, conventional water quality, water surface elevation, substrate composition, bathymetry, and beach slope at the study sites within the vicinity of the Sandy River delta. (2) Characterize the fish community and juvenile salmon migration, including species composition, length-frequency distribution, density (number/m{sup 2}), and temporal and spatial distributions in the vicinity of the Sandy River delta in the lower Columbia River and estuary (LCRE). (3) Determine the stock of origin for juvenile Chinook salmon (Oncorhynchus tshawytscha) captured at sampling sites through genetic identification. (4) Characterize the diets of juvenile Chinook and coho (O. kisutch) salmon captured within the study area. (5) Estimate run timing, residence times, and migration pathways for acoustic-tagged fish in the study area. (6) Conduct a baseline evaluation of the potential restoration to reconnect the old Sandy River channel with the delta. (7) Apply fish density data to initiate a design for a juvenile salmon monitoring program for beach habitats within the tidal freshwater segment of the LCRE (river kilometer 56-234).« less

  5. Evaluating process origins of sand-dominated fluvial stratigraphy

    NASA Astrophysics Data System (ADS)

    Chamberlin, E.; Hajek, E. A.

    2015-12-01

    Sand-dominated fluvial stratigraphy is often interpreted as indicating times of relatively slow subsidence because of the assumption that fine sediment (silt and clay) is reworked or bypassed during periods of low accommodation. However, sand-dominated successions may instead represent proximal, coarse-grained reaches of paleo-river basins and/or fluvial systems with a sandy sediment supply. Differentiating between these cases is critical for accurately interpreting mass-extraction profiles, basin-subsidence rates, and paleo-river avulsion and migration behavior from ancient fluvial deposits. We explore the degree to which sand-rich accumulations reflect supply-driven progradation or accommodation-limited reworking, by re-evaluating the Castlegate Sandstone (Utah, USA) and the upper Williams Fork Formation (Colorado, USA) - two Upper Cretaceous sandy fluvial deposits previously interpreted as having formed during periods of relatively low accommodation. Both units comprise amalgamated channel and bar deposits with minor intra-channel and overbank mudstones. To constrain relative reworking, we quantify the preservation of bar deposits in each unit using detailed facies and channel-deposit mapping, and compare bar-deposit preservation to expected preservation statistics generated with object-based models spanning a range of boundary conditions. To estimate the grain-size distribution of paleo-sediment input, we leverage results of experimental work that shows both bed-material deposits and accumulations on the downstream side of bars ("interbar fines") sample suspended and wash loads of active flows. We measure grain-size distributions of bar deposits and interbar fines to reconstruct the relative sandiness of paleo-sediment supplies for both systems. By using these novel approaches to test whether sand-rich fluvial deposits reflect river systems with accommodation-limited reworking and/or particularly sand-rich sediment loads, we can gain insight into large-scale downstream-fining and mass-extraction trends in basins with limited exposure.

  6. Time-lapse imagery of the breaching of Marmot Dam, Oregon, and subsequent erosion of sediment by the Sandy River, October 2007 to May 2008

    USGS Publications Warehouse

    Major, Jon J.; Spicer, Kurt R.; Collins, Rebecca A.

    2010-01-01

    In 2007, Marmot Dam on the Sandy River, Oregon, was removed and a temporary cofferdam standing in its place was breached, allowing the river to flow freely along its entire length. Time-lapse imagery obtained from a network of digital single-lens reflex cameras placed around the lower reach of the sediment-filled reservoir behind the dam details rapid erosion of sediment by the Sandy River after breaching of the cofferdam. Within hours of the breaching, the Sandy River eroded much of the nearly 15-m-thick frontal part of the sediment wedge impounded behind the former concrete dam; within 24-60 hours it eroded approximately 125,000 m3 of sediment impounded in the lower 300-meter-reach of the reservoir. The imagery shows that the sediment eroded initially through vertical incision, but that lateral erosion rapidly became an important process.

  7. 77 FR 50665 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-22

    ... addresses the flooding sources Allegheny River, East Sandy Creek, and Sugar Creek. DATES: Comments are to be... Jurisdictions)'' addressed the flooding sources Allegheny River, East Sandy Creek, and Sugar Creek. That table...,000 None +961 feet upstream of the confluence with the Allegheny River. Sugar Creek Approximately 0.79...

  8. River Flow Impacts Bacterial and Archaeal Community Structure in Surface Sediments in the Northern Gulf of Mexico.

    PubMed

    Ortmann, Alice C; Brannock, Pamela M; Wang, Lei; Halanych, Kenneth M

    2018-04-17

    Meiobenthic community structure in the northern Gulf of Mexico has been shown to be driven by geographical differences due to inshore-offshore gradients and location relative to river discharge. Samples collected along three transects spanning Mobile Bay, Alabama, showed significant differences in meiobenthic communities east of the bay compared to those sampled from the west. In contrast, analysis of bacterial and archaeal communities from the same sediment samples shows that the inshore-offshore gradient has minimal impact on their community structure. Significant differences in community structure were observed for Bacteria and Archaea between the east and west samples, but there was no difference in richness or diversity. Grouped by sediment type, higher richness was observed in silty samples compared to sandy samples. Significant differences were also observed among sediment types for community structure with bacteria communities in silty samples having more anaerobic sulfate reducers compared to aerobic heterotrophs, which had higher abundances in sandy sediments. This is likely due to increased organic matter in the silty sediments from the overlying river leading to low oxygen habitats. Most archaeal sequences represented poorly characterized high-level taxa, limiting interpretation of their distributions. Overlap between groups based on transect and sediment characteristics made determining which factor is more important in structuring bacterial and archaeal communities difficult. However, both factors are driven by discharge from the Mobile River. Although inshore-offshore gradients do not affect Bacteria or Archaea to the same extent as the meiobenthic communities, all three groups are strongly affected by sediment characteristics.

  9. Sediment Transport over a Dredge Pit, Sandy Point Southeast, west flank of the Mississippi River during Summer Upcoast Currents: a Coupled Wave, Current and Sediment Numerical Model

    NASA Astrophysics Data System (ADS)

    Chaichitehrani, N.; Li, C.; Xu, K.; Bentley, S. J.; Miner, M. D.

    2017-12-01

    Sandy Point southeast, an elongated sand resource, was dredged in November 2012 to restore Pelican Island, Louisiana. Hydrodynamics and wave propagation patterns along with fluvial sediments from the Mississippi River influence the sediment and bottom boundary layer dynamics over Sandy Point. A state-of-the-art numerical model, Delft3D, was implemented to investigate current variations and wave transformation on Sandy Point as well as sediment transport pattern. Delft3d FLOW and WAVE modules were coupled and validated using WAVCIS and NDBC data. Sediment transport model was run by introducing both bed and river sediments, consisted of mainly mud and a small fraction of sand. A sediment transport model was evaluated for surface sediment concentration using data derived from satellite images. The model results were used to study sediment dynamics and bottom boundary layer characteristics focused on the Sandy Point area during summer. Two contrasting bathymetric configurations, with and without the Sandy Point dredge pit, were used to conduct an experiment on the sediment and bottom boundary layer dynamics. Preliminary model results showed that the presence of the Sandy Point pit has very limited effect on the hydrodynamics and wave pattern at the pit location. Sediments from the Mississippi River outlets, especially in the vicinity of the pit, get trapped in the pit under the easterly to the northeasterly upcoast current which prevails in August. We also examined the wave-induced sediment reworking and river-borne fluvial sediment over Sandy Point. The effect of wind induced orbital velocity increases the bottom shear stress compared to the time with no waves, relatively small wave heights (lower than 1.5 meters) along the deepest part of the pit (about 20 meters) causes little bottom sediment rework during this period. The results showed that in the summertime, river water is more likely the source of sedimentation in the pit.

  10. Magnitude and timing of downstream channel aggradation and degradation in response to a dome-building eruption at Mount Hood, Oregon

    USGS Publications Warehouse

    Pierson, Thomas C.; Pringle, Patrick T.; Cameron, Kenneth A.

    2011-01-01

    A dome-building eruption at Mount Hood, Oregon, starting in A.D. 1781 and lasting until ca. 1793, produced dome-collapse lithic pyroclastic flows that triggered lahars and intermittently fed 108 m3 of coarse volcaniclastic sediment to sediment reservoirs in headwater canyons of the Sandy River. Mobilization of dominantly sandy sediment from these reservoirs by lahars and seasonal floods initiated downstream migration of a sediment wave that resulted in a profound cycle of aggradation and degradation in the lowermost reach of the river (depositional reach), 61-87 km from the source. Stratigraphic and sedimentologic relations in the alluvial fill, together with dendrochronologic dating of degradation terraces, demonstrate that (1) channel aggradation in response to sediment loading in the headwater canyons raised the river bed in this reach at least 23 m in a decade or less; (2) the transition from aggradation to degradation in the upper part of this reach roughly coincided with the end of the dome-building eruption; (3) fluvial sediment transport and deposition, augmented by one lahar, achieved a minimum average aggradation rate of ~2 m/yr; (4) the degradation phase of the cycle was more prolonged than the aggradation phase, requiring more than half a century for the river to reach its present bed elevation; and (5) the present longitudinal profile of the Sandy River in this reach is at least 3 m above the pre-eruption profile. The pattern and rate of channel response and recovery in the Sandy River following heavy sediment loading resemble those of other rivers similarly subjected to very large sediment inputs. The magnitude of channel aggradation in the lower Sandy River, greater than that achieved at other volcanoes following much larger eruptions, was likely enhanced by lateral confinement of the channel within a narrow incised valley. A combination of at least one lahar and winter floods from frequent moderate-magnitude rainstorms and infrequent very large storms was responsible for flushing large volumes of sediment to the depositional reach. These conditions permitted a sedimentation response in the Sandy River that approached the magnitude of channel aggradation resulting elsewhere from large explosive eruptions and high-intensity rainfall regimes, despite the fact that the Sandy River aggradation was in response to an unremarkable dome-building eruption in a climate dominated by low to moderate rainfall intensities.

  11. Superstorm Sandy and the Verdant Power RITE Project

    NASA Astrophysics Data System (ADS)

    Corren, D.; Colby, J.; Adonizio, M.

    2013-12-01

    On October 29, 2012 Superstorm Sandy (formerly Hurricane Sandy) made landfall in New Jersey. One of the deadliest, and second-costliest hurricane in US history, Sandy was the largest Atlantic hurricane on record, with a diameter of 1,800 km. It was this unprecedented size, extreme central low pressure, and full-moon timing that created a storm surge which inundated New York City with record-breaking water levels, resulting in tremendous destruction of buildings and infrastructure. At its RITE (Roosevelt Island Tidal Energy) Project in New York City's East River, Verdant Power has been installing demonstration and commercial turbine systems since 2005, along with performing related environmental monitoring and measurements. The RITE site is located in the East Channel of the East River, on the east side of Roosevelt Island. All along the East River, large areas of the adjacent boroughs were impacted by Sandy, including flooding of the subway tunnels under the river. When Sandy struck, Verdant had recently concluded a two-week in-water test at RITE of a new rotor for its Gen5 KHPS (Kinetic Hydropower System) turbine, with funding assistance by partners NYSERDA and the US Department of Energy. While the turbine had already been removed from its mounting in the river bottom in September, Verdant continued to operate two water measurement instruments in the river. These acoustic Doppler current profilers (ADCPs) measure the 3-D water velocity at various heights in the water column, and are also equipped to provide water level data. Verdant is interested in the effects such an extreme storm could have on turbines and other equipment installed in this river reach, as is planned by Verdant under a 10-year commercial pilot project licensed by the Federal Energy Regulatory Commission (FERC) for up to 30 turbines. Associated equipment includes navigational aids (buoys and signage), which Verdant is required to maintain to exclude vessels from the project boundaries. The East River water speed and level data acquired during Sandy is revelatory, not only indicating the extent and timing of the extraordinarily high levels, but also significant changes to the very sense of the tidal flows. This unique observational data provides an invaluable insight for Verdant Power, the marine and hydrokinetic (MHK) industry, and researchers studying the potential effects of extreme storms on New York City and potential countermeasures. In this paper, Verdant first presents the East River data collected during Superstorm Sandy, indicating what actually happened during the storm. Verdant provides further analyses and estimates of the potential for yet more extreme water levels due to different storm timing relative to the astronomical tides. These results should also provide additional insights for measures to prepare for extreme storms in the New York City area. Specific to Verdant Power, as a renewable energy developer, we also analyze the data to estimate how a different storm timing could affect the water velocity through the river. We relate these findings to the design criteria for our turbines and associated equipment, and draw conclusions about the potential impact of an extreme storm such as Sandy on a commercial array of kinetic hydropower turbines.

  12. 33 CFR 165.507 - Security Zone; Chesapeake Bay, between Sandy Point and Kent Island, MD.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... south (eastbound) span of the William P. Lane Jr. Memorial Bridge, from the western shore at Sandy Point to the eastern shore at Kent Island, Maryland. (c) Regulations. (1) All persons are required to...

  13. Reconstructing Mississippi River Deltaic Wetland Hydrostratigraphy Using Compositional Kriging Method - Implications for Groundwater, Groundwater-River Water Interaction, Subsidence and Deltaic Wetland Evolution

    NASA Astrophysics Data System (ADS)

    Li, A.; Tsai, F. T. C.; White, C.; Wang, J.; Bentley, S. J.; Xu, K.

    2016-12-01

    River deltaic wetlands are formed along coastal area where sediment-laden river water reaches ocean. A river deltaic wetland is a complex system that mainly consists of groundwater, soil and vegetation components. Groundwater makes up a large portion of the system. The wetlands are important to human being and wild life. This research focuses on hydrostratigraphic architecture of the Mississippi River deltaic wetland. Research area includes lower Barataria Bay and lower Breton Sound that located on the Mississippi River Delta in southern Louisiana. In this study, a three dimensional hydrostratigraphy model is constructed using coring survey grain size data and geostatistics approach. A three-dimensional grid system is firstly constructed to cover the whole research domain. Each cell of the grid has a dimension of 100 meters by 100 meters by 1 centimeter (length by width by depth). Then Compositional Kriging and Gaussian Sequential Simulation methods are adopted to estimate soil composition (sand, silt and clay fractions) for each cell. A result has been generated to reveal spatial hydro facies variation by cutting cross sections and extracting soil texture maps at different locations. In the result, bay silt makes a large portion of the sediments body and sandy sediments are shown at different depths in both sides of the river. In Barataria Bay, sand bodies are lenticular, relatively thick and vertical continuous, however, in Breton Sound, sand bodies are sheet-like, relatively thin and vertical non-continuous. It is likely that the sandy sediments in Barataria Bay and Breton Sound are deposited in distal distributary and overbank flow respectively. Larger sandy bodies are prone to form in the distal distributary than in the overbank flow. Sandy units formed in the distal distributary can provide better interconnection between river water and groundwater than that formed in the overbank flow. Larger sandy bodies also provides more space to store groundwater. More silty and clayey sediments in the Breton Sound side make it more subject to compactional subsidence. More sandy sediments occur at the shallow portion of the Breton Sound than Barataria Bay. And these sands are interpreted as transgressive product that is formed by reworking forces such as wind, tide, cold front and storm.

  14. Hydrogeology, groundwater levels, and generalized potentiometric-surface map of the Green River Basin lower Tertiary aquifer system, 2010–14, in the northern Green River structural basin

    USGS Publications Warehouse

    Bartos, Timothy T.; Hallberg, Laura L.; Eddy-Miller, Cheryl

    2015-07-14

    The groundwater-level measurements were used to construct a generalized potentiometric-surface map of the Green River Basin lower Tertiary aquifer system. Groundwater-level altitudes measured in nonflowing and flowing wells used to construct the potentiometric-surface map ranged from 6,451 to 7,307 feet (excluding four unmeasured flowing wells used for contour construction purposes). The potentiometric-surface map indicates that groundwater in the study area generally moves from north to south, but this pattern of flow is altered locally by groundwater divides, groundwater discharge to the Green River, and possibly to a tributary river (Big Sandy River) and two reservoirs (Fontenelle and Big Sandy Reservoirs).

  15. Eruption-related lahars and sedimentation response downstream of Mount Hood: Field guide to volcaniclastic deposits along the Sandy River, Oregon

    USGS Publications Warehouse

    Pierson, Tom C.; Scott, William E.; Vallance, James W.; Pringle, Patrick T.; O'Connor, Jim; Dorsey, Rebecca; Madin, Ian

    2009-01-01

    Late Holocene dome-building eruptions at Mount Hood during the Timberline and Old Maid eruptive periods resulted in numerous dome-collapse pyroclastic flows and lahars that moved large volumes of volcaniclastic sediment into temporary storage in headwater canyons of the Sandy River. During each eruptive period, accelerated sediment loading to the river through erosion and remobilization of volcanic fragmental debris resulted in very high sediment-transport rates in the Sandy River during rain- and snowmelt-induced floods. Large sediment loads in excess of the river's transport capacity led to channel aggradation, channel widening, and change to a braided channel form in the lowermost reach of the river, between 61 and 87 km downstream from the volcano. The post-eruption sediment load moved as a broad bed-material wave, which in the case of the Old Maid eruption took ~2 decades to crest 83 km downstream. Maximum post-eruption aggradation levels of at least 28 and 23 m were achieved in response to Timberline and Old Maid eruptions. In each case, downstream aggradation cycles were initiated by lahars, but the bulk of the aggradation was achieved by fluvial sediment transport and deposition. When the high rates of sediment supply began to diminish, the river degraded, incising the channel fills and forming progressively lower sets of degradational terraces. A variety of debris-flow, hyperconcentrated-flow, and fluvial (upper and lower flow regime) deposits record the downstream passage of the sediment waves that were initiated by these eruptions. The deposits also presage a hazard that may be faced by communities along the Sandy River when volcanic activity at Mount Hood resumes.

  16. 46 CFR 7.35 - Sandy Hook, NJ to Cape May, NJ.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Atlantic Coast § 7.35 Sandy Hook, NJ to Cape May, NJ. (a) A line drawn from Shark River Inlet North Breakwater Light “2” to Shark River Inlet South Breakwater Light “1”. (b) A line drawn from Manasquan Inlet... Absecon Inlet North Jetty to Atlantic City Light. (g) A line drawn from the southernmost point of Longport...

  17. Geologic map of the Washougal quadrangle, Clark County, Washington, and Multnomah County, Oregon

    USGS Publications Warehouse

    Evarts, Russell C.; O'Connor, Jim E.; Tolan, Terry L.

    2013-01-01

    The Washougal 7.5’ quadrangle spans the boundary between the Portland Basin and the Columbia River Gorge, approximately 30 km east of Portland, Oregon. The map area contains the westernmost portion of the Columbia River Gorge National Scenic area as well as the rapidly growing areas surrounding the Clark County, Washington, cities of Camas and Washougal. The Columbia River transects the map area, and two major tributaries, the Washougal River in Washington and the Sandy River in Oregon, also flow through the quadrangle. The Columbia, Washougal, and Sandy Rivers have all cut deep valleys through hilly uplands, exposing Oligocene volcanic bedrock in the north part of the map area and lava flows of the Miocene Columbia River Basalt Group in the western Columbia River Gorge. Elsewhere in the map area, these older rocks are buried beneath weakly consolidated to well-consolidated Neogene and younger basin-fill sedimentary rocks and Quaternary volcanic and sedimentary deposits. The Portland Basin is part of the Coastal Lowland that separates the Cascade Range from the Oregon Coast Range. The basin has been interpreted as a pull-apart basin located in the releasing stepover between two en echelon, northwest-striking, right-lateral fault zones. These fault zones are thought to reflect regional transpression, transtension, and dextral shear within the forearc in response to oblique subduction of the Pacific plate along the Cascadia Subduction Zone. The southwestern margin of the Portland Basin is a well-defined topographic break along the base of the Tualatin Mountains, an asymmetric anticlinal ridge that is bounded on its northeast flank by the Portland Hills Fault Zone, which is probably an active structure. The nature of the corresponding northeastern margin of the basin is less clear, but a series of poorly defined and partially buried dextral extensional structures has been hypothesized from topography, microseismicity, potential-field anomalies, and reconnaissance geologic mapping. This map is a contribution to a program designed to improve the geologic database for the Portland Basin region of the Pacific Northwest urban corridor, the densely populated Cascadia forearc region of western Washington and Oregon. Updated, more detailed information on the bedrock and surficial geology of the basin and its surrounding area will facilitate improved assessments of seismic risk, and resource availability in this rapidly growing region.

  18. Comparisons of microplastic pollution between mudflats and sandy beaches in Hong Kong.

    PubMed

    Lo, Hoi-Shing; Xu, Xiaoyu; Wong, Chun-Yuen; Cheung, Siu-Gin

    2018-05-01

    Most of the previous studies of microplastic pollution on coastal habitats focused on high energy beaches although low energy areas such as mudflats are supposed to retain more microplastics, not to mention that mudflats are biologically more diverse. We quantified and characterized microplastics from 10 mudflats and 10 sandy beaches in Hong Kong spanning from the eastern to western waters. Sediment samples were collected at 1.0 m and 1.5 m above chart datum (CD) and at the strandline. Abundance of microplastics ranged between 0.58 and 2116 items kg -1 sediment with that on mudflats being ten times more than on beaches. Polyethylene (46.9%) was the most abundant and followed by polypropylene (13.8%) and polyethylene terephthalate (13.5%). Expanded polystyrene was the most abundant in the strandline samples but not at 1.0 m and 1.5 m above CD. Although previous studies have concluded that the input from Pearl River is a major source of microplastics on Hong Kong shores, this study has demonstrated that the contribution of local pollution sources such as discharge from sewage treatment plants to microplastic pollution should not be neglected. Copyright © 2018 Elsevier Ltd. All rights reserved.

  19. DOE Office of Scientific and Technical Information (OSTI.GOV)

    Sobocinski, Kathryn; Johnson, Gary; Sather, Nichole

    This document is the first annual report for the study titled 'Ecology of Juvenile Salmonids in Shallow Tidal Freshwater Habitats in the Vicinity of the Sandy River Delta in the Lower Columbia River'. Hereafter, we refer to this research as the Tidal Freshwater Monitoring (TFM) Study. The study is part of the research, monitoring, and evaluation effort developed by the Action Agencies (Bonneville Power Administration, U.S. Army Corps of Engineers, U.S. Bureau of Reclamation) in response to obligations arising from the Endangered Species Act as a result of operation of the Federal Columbia River Power System (FCRPS). The project ismore » performed under the auspices of the Northwest Power and Conservation Council's Columbia Basin Fish and Wildlife Program. The goal of the 2007-2009 Tidal Freshwater Monitoring Study is to answer the following questions: In what types of habitats within the tidal freshwater area of the lower Columbia River and estuary (LCRE; Figure 1) are yearling and subyearling salmonids found, when are they present, and under what environmental conditions?1 And, what is the ecological importance2 of shallow (0-5 m) tidal freshwater habitats to the recovery of Upper Columbia River spring Chinook salmon and steelhead and Snake River fall Chinook salmon? Research in 2007 focused mainly on the first question, with fish stock identification data providing some indication of Chinook salmon presence at the variety of habitat types sampled. The objectives and sub-objectives for the 2007 study were as follows: (1) Habitat and Fish Community Characteristics-Provide basic data on habitat and fish community characteristics for yearling and subyearling salmonids at selected sites in the tidal freshwater reach in the vicinity of the Sandy River delta. (1a) Characterize vegetation assemblage percent cover, conventional water quality, substrate composition, and beach slope at each of six sampling sites in various tidal freshwater habitat types. (1b) Determine fish community characteristics, including species composition, abundance, and temporal and spatial distributions. (1c) Estimate the stock of origin for the yearling and subyearling Chinook salmon captured at the sampling sites using genetic analysis. (1d) Statistically assess the relationship between salmonid abundance and habitat parameters, including ancillary variables such as temperature and river stage. (2) Acoustic Telemetry Monitoring-Assess feasibility of applying Juvenile Salmon Acoustic Telemetry System (JSATS) technology to determine migration characteristics from upriver of Bonneville Dam through the study area (vicinity of the Sandy River delta/Washougal River confluence). (2a) Determine species composition, release locations, and distributions of JSATS-tagged fish. (2b) Estimate run timing, residence times, and migration pathways for these fish. Additionally, both objectives serve the purpose of baseline research for a potential tidal rechannelization project on the Sandy River. The U.S. Forest Service, in partnership with the Bonneville Power Administration and the U.S. Army Corps of Engineers, is currently pursuing reconnection of the east (relict) Sandy River channel with the current channel to improve fish and wildlife habitat in the Sandy River delta. Our study design and the location of sampling sites in this reach provide baseline data to evaluate the potential restoration.« less

  20. GENERAL VIEW OF SOUTH SAN GABRIEL RIVER BRIDGE, RIVER SPAN, ...

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

    GENERAL VIEW OF SOUTH SAN GABRIEL RIVER BRIDGE, RIVER SPAN, LOOKING NORTHWEST. - South San Gabriel River Bridge, Spanning South Fork of San Gabriel River at Georgetown at Business Route 35, Georgetown, Williamson County, TX

  1. 6. VIEW OF APPROACH SPAN AND MAIN SPAN OF THE ...

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

    6. VIEW OF APPROACH SPAN AND MAIN SPAN OF THE ACCESS BRIDGE AND INTAKE PIER, LOOKING SOUTHWEST. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  2. DETAIL OF NORTH SAN GABRIEL RIVER BRIDGE, CANTILEVER SPAN CONNECTION, ...

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

    DETAIL OF NORTH SAN GABRIEL RIVER BRIDGE, CANTILEVER SPAN CONNECTION, LOOKING SOUTHEAST. - North San Gabriel River Bridge, Spanning North Fork of San Gabriel River at Business Route 35, Georgetown, Williamson County, TX

  3. View of central lift span truss web of Tensaw River ...

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

    View of central lift span truss web of Tensaw River Bridge, showing support girders for life house, looking east - Tensaw River Lift Bridge, Spanning Tensaw River at U.S. Highway 90, Mobile, Mobile County, AL

  4. DETAIL OF SOUTH SAN GABRIEL RIVER BRIDGE, CANTILEVER SPAN CONNECTION, ...

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

    DETAIL OF SOUTH SAN GABRIEL RIVER BRIDGE, CANTILEVER SPAN CONNECTION, LOOKING NORTHWEST. - South San Gabriel River Bridge, Spanning South Fork of San Gabriel River at Georgetown at Business Route 35, Georgetown, Williamson County, TX

  5. Dust Plume off the Coast of Egypt

    NASA Technical Reports Server (NTRS)

    2007-01-01

    Dwarfing the Nile, a river of dust flowed out of the deserts of northern Egypt on May 19, 2007. As the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite passed overhead at 12:05 p.m. local time in Cairo, the sensor captured this image of the dust spreading northward over the Mediterranean Sea from the sandy deserts that span the country. At the margins of the plume, ribbons and ripples of dust are translucent, allowing a glimpse of the desert and water beneath, but in the center, the cloud is opaque, revealing nothing of the surface below. The part of north-central Egypt hidden by the dust plume is the Qattara Depression, the country's lowest point. Dipping down to 133 meters below sea level (436 feet), the depression is home to sandy deserts and dry lake beds that occasionally flood. The sand and fine, lake bed sediments are easily lofted into the air by strong winds that scour the area in late winter and early spring. In the eastern (right-hand) part of the image, the Nile River is lined by narrow ribbons of dull green vegetation. The fan-shaped delta is dotted with tan-colored spots, marking the location of cities and towns. The Nile Valley and Delta make up only a small fraction of the country's total land area, yet they support almost the entire population. The large image provided above has a spatial resolution (level of detail) of 250 meters per pixel. The MODIS Rapid Response Team provides this image in additional resolutions. The Earth Observatory also provides a 250-meter-resolution KMZ file of this image for use with Google Earth.

  6. Residence Times of Juvenile Salmon and Steelhead in Off-Channel Tidal Freshwater Habitats, Columbia River, USA

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Johnson, Gary E.; Ploskey, Gene R.; Sather, Nichole K.

    We estimated seasonal residence times of acoustic-tagged juvenile salmonids in off-channel, tidal freshwater habitats of the Columbia River near the Sandy River delta (rkm 198; 2007, 2008, 2010, and 2011) and Cottonwood Island (rkm 112; 2012).

  7. 77 FR 57024 - Drawbridge Operation Regulation; Tombigbee River, AL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-17

    ... lift span bridge across the Tombigbee River at Naheola, Marengo and Choctaw Counties, Alabama. The... MNBR vertical lift span bridge crosses the Tombigbee River at mile 128.6 (Black Warrior Tombigbee... Meridian and Bigbee Railroad (MNBR) vertical lift span bridge across the Tombigbee River, mile 128.6 (Black...

  8. 77 FR 25655 - Drawbridge Operation Regulation; Tombigbee River, AL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-01

    ... Meridian and Bigbee Railroad (MNBR) vertical lift span bridge across the Tombigbee River at Naheola... The MNBR vertical lift span bridge crosses the Tombigbee River at mile 128.6 (Black Warrior Tombigbee... Railroad (MNBR) vertical lift span bridge across the Tombigbee River, mile 128.6 (Black Warrior Tombigbee...

  9. 77 FR 44544 - Safety Zone; Gilmerton Bridge Center Span Float-In, Elizabeth River; Norfolk, Portsmouth, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-30

    ...-AA00 Safety Zone; Gilmerton Bridge Center Span Float-In, Elizabeth River; Norfolk, Portsmouth, and... withdrawing its proposed rule concerning the Gilmerton Bridge Center Span Float-in and bridge construction of... ``Safety Zone; Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and Chesapeake...

  10. 9. VIEW OF INTAKE PIER AND MAIN SPAN OF ACCESS ...

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

    9. VIEW OF INTAKE PIER AND MAIN SPAN OF ACCESS BRIDGE FROM WATER LEVEL, LOOKING NORTHWEST. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  11. View of West end of central lift span truss web ...

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

    View of West end of central lift span truss web of Tensaw River Bridge, showing web brace of lift girder superstructure, looking west - Tensaw River Lift Bridge, Spanning Tensaw River at U.S. Highway 90, Mobile, Mobile County, AL

  12. Lithofacies variability in the Lower Khvalynian sediments of the North Caspian Sea region.

    NASA Astrophysics Data System (ADS)

    Makshaev, Radik; Svitoch, Aleksandr

    2016-04-01

    The Early Khvalynian period (~15 500-12 500 cal years B.P.) is characterized by continuous dynamic changes in North Caspian Sea region environment, which has been confirmed by numerous data obtained during the lithofacies analysis of its key sections. Lithofacies complex of the North Caspian Sea region contains four subfacies - clayey, laminated, sandy-clayey and aleurite-clayey. Clayey facie is characterized by absolutely clayey structure with massive nonlamellated or subfissile dark-brown clays and rarely contains thin aleurite layers. This subfacie is one of the most widespread in the North Caspian Sea region. Clayey facies are typical for the most of the key sections in the Middle Volga (Bykovo, Torgun, Rovnoe, Novoprivolnoe, Chapaevka), Lower Volga (Svetly Yar) and on the left side of the Volga River valley (Verkhny Baskunchak, Krivaya Loshchina, Bolshoy Liman). Deep paleodepressions of the Lower Volga and the left side of the Volga River valley are also characterized by the maximum of the average clays thickness, which can reach up to 10 m. Sandy-clayey subfacie is characterized by stratified structure with horizontal and lenticular lamination of clays with sandy-aleuritic interlayers. The average thickness of sand layers is 2-5 cm. At most of the key sections thickness of clay layers is up to twice larger than the sands layers and only on depressions' periphery can be exceeded by some terrigenous interlayers. Sandy-aleuritic parts of clays have different mineral structure. Light suite is dominated by quartz and feldspar with some debris of heavy minerals, glauconite and calcite. Fraction of the heavy minerals contains titano ferrite, epidote, granite, zircon, amphibole, rutile, disthene, tourmaline, sillimanite. Layered subfacie is the most abundant among the chocolate clays and is widespread in the Lower Volga River region and the Ural River valley, but sporadic in Kalmykia and the Volga Delta. Sandy-clayey and aleurit-clayey subfacies have rare distribution. Sandy-clayey subfacie (Raigorog section) contains two patches of clays, that are interbedded by thick sandy layer with khvalynian mollusks shells. Aleurite-clayey subfacie is typical for the upper part of the Volgian estuary (Chapaevka, Torgun). During the Early Khvalynian transgression only clayey-aleuritic deposits, which represent the Early Khvalynian period, accumulated in flooded territory of the Volga river valley. On the most part of investigated territory facies are presented by clays (chocolate clays), which are predominantly located in the middle part of the Early Khvalynian sections and constrained by sands with mollusk shells on its bottom and top. These facies are very common in the bottom part of the sections in the Lower Volga region, while in the Middle Volga region clays are dominated in all segments of the Khvalynian strata. But these clays can't be classified into an individual stratigraphic layer as they don't contain index mollusks and have different stratigraphic location. This work is supported by the RFBR (Project 14-05-00227) and the RSCF (Project 16-17-10103).

  13. 77 FR 35900 - Safety Zone; Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-15

    ...-AA00 Safety Zone; Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and... navigable waters during the Gilmerton Bridge Center Span Float- in and bridge construction of span placement... the existing bascule spans from the Gilmerton Bridge, transport the new center span from the Eastern...

  14. Aerial view of the entire bridge crossing the Tennessee River ...

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

    Aerial view of the entire bridge crossing the Tennessee River looking up river. The swing bridge, when open, permits river navigational traffic to ply the river. Construction of a replacement bridge, to be located 93.27 feet down river, has now started. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  15. Salmon redd identification using environmental DNA (eDNA)

    USGS Publications Warehouse

    Pilliod, David S.; Laramie, Matthew B.

    2016-06-10

    IntroductionThe purpose of this project was to develop a technique to use environmental DNA (eDNA) to distinguish between redds made by Chinook salmon (Oncorhynchus tshawytscha) and redds made by Coho salmon (O. kisutch) and to distinguish utilized redds from test/abandoned redds or scours that have the appearance of redds. The project had two phases:Phase 1. Develop, test, and optimize a molecular assay for detecting and identifying Coho salmon DNA and differentiating it from Chinook salmon DNA.Phase 2. Demonstrate the efficacy of the technique.Collect and preserve water samples from the interstitial spaces of 10 known redds (as identified by expert observers) of each species and 10 gravel patches that do not include a redd of either species.Collect control samples from the water column adjacent to each redd to establish background eDNA levels.Analyze the samples using the developed molecular assays for Coho salmon (phase I) and Chinook salmon (Laramie and others, 2015).Evaluate whether samples collected from Chinook and Coho redds have significantly higher levels of eDNA of the respective species than background levels (that is, from gravel, water column).Evaluate whether samples collected from the interstitial spaces of gravel patches that are not redds are similar to background eDNA levels.The Sandy River is a large tributary of the Columbia River. The Sandy River meets the Columbia River approximately 23 km upstream of Portland, Oregon. The Sandy River Basin provides overlapping spawning habitat for both Chinook and Coho salmon.Samples provided by Portland Water Bureau for analysis were collected from the Bull Run River, Sixes Creek, Still Creek, Arrah Wanna Side Channel, and Side Channel 18.

  16. 3. DETAIL VIEW OF ONE ARCH SPAN, LOOKING NW ALONG ...

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

    3. DETAIL VIEW OF ONE ARCH SPAN, LOOKING NW ALONG EAST BANK OF SUSQUEHANNA RIVER. NOTE FLOOD STAGE MARKINGS ON PIER, ALSO LONGITUDINAL CONSTRUCTION JOINT IN ARCH BARREL. - Philadelphia & Reading Railroad, Susquehanna River Bridge, Spanning Susquehanna River, North of I-83 Bridge, Harrisburg, Dauphin County, PA

  17. 77 FR 43557 - Safety Zone; Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-25

    ...-AA00 Safety Zone; Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and... during the Gilmerton Bridge Center Span Float- in and bridge construction of span placement. This action... Construction, INC will facilitate removal of the existing bascule spans from the Gilmerton Bridge, transport of...

  18. Assessment of chemical and biological significance of arsenical species in the Maurice River drainage basin (N. J. ). Part II. Partitioning of arsenic into bottom sediments

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Faust, S.D.; Winka, A.J.; Belton, T.

    1987-01-01

    A laboratory study was conducted on the partitioning of four arsenical species onto organic and sandy bottom sediments of Union Lake, N.J. Sandy sediments released more arsenic and sorbed less arsenic than the organic sediments. Organic sediments generally sorbed inorganic As species better than organic As species.

  19. Floods of January-February 1957 in southeastern Kentucky and adjacent areas

    USGS Publications Warehouse

    ,

    1964-01-01

    Heavy rains over an extensive area on January 27-February 2, caused extreme flooding in southeastern Kentucky and adjacent areas in West Virginia, Virginia, and Tennessee. Total rainfall for the storm period ranged from 6-9 inches over most of the report area and was 12? inches at the eastern end of the Virginia-Kentucky State line. The principal basins affected by the storm were those of the Big Sandy, Kentucky, Cumberland, and Tennessee Rivers. Maximum discharge of record occurred in many streams. On Levisa Fork near Grundy, Va., the peak discharge of 33,200 cfs was 50 percent greater than the previous maximum in 17 years of record and was 3.3 times the mean annual flood. The peak discharges on-tributaries of the Kentucky River and on ,the Holston and Clinch Rivers were also the greatest of record and .those on the upper Cumberland River were nearly as great as .those during the historic floods of 1918 and 1946. Total flood damage was estimated at $61 million of which $39 million was in the Big Sandy River basin (mostly in Kentucky) and $15 million was in the Kentucky River basin--$52 million of the total damage was in Kentucky.

  20. EXTERIOR VIEW, LOOKING WEST, WITH CENTER SPAN EXTENDING ACROSS WARRIOR ...

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

    EXTERIOR VIEW, LOOKING WEST, WITH CENTER SPAN EXTENDING ACROSS WARRIOR RIVER. - Gulf, Mobile & Ohio Railroad Bridge, Spans Black Warrior River between Northport & Tuscaloosa, Tuscaloosa, Tuscaloosa County, AL

  1. EXTERIOR VIEW, LOOKING WEST, WITH CENTER SPAN EXTENDING ACROSS WARRIOR ...

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

    EXTERIOR VIEW, LOOKING WEST, WITH CENTER SPAN EXTENDING ACROSS WARRIOR RIVER AND COAL BARGES (LEFT). - Gulf, Mobile & Ohio Railroad Bridge, Spans Black Warrior River between Northport & Tuscaloosa, Tuscaloosa, Tuscaloosa County, AL

  2. 78. VIEW SHOWING PLACEMENT OF LIFE SPAN SHOE ON PIER ...

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

    78. VIEW SHOWING PLACEMENT OF LIFE SPAN SHOE ON PIER 6, LOOKING NORTH, March 5, 1935 - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  3. 77 FR 14689 - Drawbridge Operation Regulation; Berwick Bay (Atchafalaya River), Morgan City, LA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-13

    ... Fe (BNSF) Railway Company vertical lift span bridge across Berwick Bay, mile 0.4, (Atchafalaya River... vertical lift span railroad bridge across Berwick Bay, mile 0.4 (Atchafalaya River, mile 17.5), at Morgan City, St. Mary Parish, Louisiana. The vertical lift span bridge has a vertical clearance of 6.4 feet...

  4. The lost micro-deserts of the Patuxent River using landscape history, insect and plant specimens, and field work to detect and define a unique community

    USGS Publications Warehouse

    Droege, S.; Davis, C.A.; Steiner, W.E.; =Mawdsley, J.

    2009-01-01

    Historical and recent records of both plants and insects are synthesized for uplands along the eastern edge of Maryland?s Patuxent River from the edge of the Piedmont south to Jug Bay. This strip is characterized by deep sandy soils found in the Evesboro and Galestown sandy loams soil series. Within this narrow strip there exists a unique flora and fauna adapted to open dry sandy soils and occurring in small remnant patches associated with old sand mining operations and scattered protected areas. We illustrate the uniqueness of these sites using four groups, vascular plants, tenebrionid beetles (Coleoptera: Tenebrionidae), tiger beetles (Coleoptera: Cicindelidae), and bees (Hymenoptera: Apoidea: Anthophila). Within each of these groups, rare species were detected whose populations were locally restricted to this soil type and whose nearest known populations were often hundreds of kilometers away. In addition to documenting the direct conservation importance of these small sandy openings along the Patuxent, we contrast the lack of any indication from vertebrate inventories that this region is unique. The combination of plant and insect inventories appears to be a better means of clarifying a site?s importance than does any survey of a single taxonomic group.

  5. General closeup view of the swing span bridge in the ...

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

    General close-up view of the swing span bridge in the close position, looking upriver. The pivot/center pier is positioned in the center of Tennessee River. Note: Each arm of the continuous swing span acts as simple spans. The total span over four (4) supports is partially continuous-- the middle panel at the center pier is continuous for bending moments, but discontinuous for shears. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  6. A ravenous river reclaims its true course: the tale of Marmot Dam''s demise

    Treesearch

    Noreen Parks; Gordon Grant

    2009-01-01

    Removing dams that are outdated, unsafe, or pose significant economic or environmental costs has emerged in the last 10 years as a major river restoration strategy. The removal of the 45-foot-high Marmot Dam on the Sandy River in 2007 resulted in the biggest sediment release accompanying any dam removal to date. It also provided an unprecedented opportunity...

  7. 63. VIEW OF THE SHOOFLY BRIDGE LIFT SPAN BEING FLOATED ...

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

    63. VIEW OF THE SHOOFLY BRIDGE LIFT SPAN BEING FLOATED INTO PLACE, LOOKING NORTH, January 29, 1935 - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  8. 3. VIEW OF EAST SOUTHEAST, GROUND LEVEL VIEW OF ...

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

    3. VIEW OF EAST - SOUTHEAST, GROUND LEVEL VIEW OF APPROACH SPANS, NORTH END OF BRIDGE, MAIN SPANS IN BACKGROUND - Buffalo River Bridge, Spanning Buffalo River on U.S. Highway 65, Marshall, Searcy County, AR

  9. The surface sediment types and their rare earth element characteristics from the continental shelf of the northern south China sea

    NASA Astrophysics Data System (ADS)

    Wang, Shuhong; Zhang, Nan; Chen, Han; Li, Liang; Yan, Wen

    2014-10-01

    The grain size as well as some major and trace elements, including rare earth element (REE), for 273 surface sediment samples collected from the continental shelf of the northern South China Sea were analyzed in this study. The sediment types are mainly sandy silt and silt, making up 60% of the whole samples, and secondly are mud, sandy mud, muddy sand and silty sand, making up 28% of the whole samples, based on grain-size in which the Folk's classification was used. The total REE content (ΣREE) show a wide variation from 21 ppm to 244 ppm with an average value of 155 ppm, which similar to the average ΣREE of the China loess, but much different from that in deep-sea clay, showing a significant terrigenous succession. The REE contents in different sediment types vary greatly, mainly enriching in silt, sandy silt, mud and sandy mud. The REE distribution contours parallel to the coastal, presenting like strips and their contents gradually reduce with increasing distance from the coast. The high content of the western Pearl River Mouth, Shang/Xiachuan Islands and Hailing Bay might be regarded to the coastal current developed from the east to the west along to the Pearl River Mouth in the northern South China Sea. But the chondrite-normalized REE patterns in various sediment types have no difference, basically same as those of coastal rivers and upper crust. They all show relative enrichments in light rare earth element (LREE), noticeable negative Eu anomaly and no Ce anomaly, indicating that those sediments are terrigenous sediments and from the same source region. Further analysis suggest that the sedimentary environment in the study area is relatively stable and granite widely distributed in the South China mainland is the main source of REE, which are transported mainly by the Pearl River. The late diagenesis has little effect on the REE.

  10. Evidence for insolation and Pacific forcing of late glacial through Holocene climate in the Central Mojave Desert (Silver Lake, CA)

    NASA Astrophysics Data System (ADS)

    Kirby, Matthew E.; Knell, Edward J.; Anderson, William T.; Lachniet, Matthew S.; Palermo, Jennifer; Eeg, Holly; Lucero, Ricardo; Murrieta, Rosa; Arevalo, Andrea; Silveira, Emily; Hiner, Christine A.

    2015-09-01

    Silver Lake is the modern terminal playa of the Mojave River in southern California (USA). As a result, it is well located to record both influences from the winter precipitation dominated San Bernardino Mountains - the source of the Mojave River - and from the late summer to early fall North American monsoon at Silver Lake. Here, we present various physical, chemical and biological data from a new radiocarbon-dated, 8.2 m sediment core taken from Silver Lake that spans modern through 14.8 cal ka BP. Texturally, the core varies between sandy clay, clayey sand, and sand-silt-clay, often with abrupt sedimentological transitions. These grain-size changes are used to divide the core into six lake status intervals over the past 14.8 cal ka BP. Notable intervals include a dry Younger Dryas chronozone, a wet early Holocene terminating 7.8 - 7.4 cal ka BP, a distinct mid-Holocene arid interval, and a late Holocene return to ephemeral lake conditions. A comparison to potential climatic forcings implicates a combination of changing summer - winter insolation and tropical and N Pacific sea-surface temperature dynamics as the primary drivers of Holocene climate in the central Mojave Desert.

  11. 480mm telephoto perspective, looking south toward midspan and south anchor ...

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

    480-mm telephoto perspective, looking south toward mid-span and south anchor arm. - Pittsburgh & Lake Erie Railroad, Ohio River Bridge, Spanning Ohio River, West of Beaver River, Beaver, Beaver County, PA

  12. 480mm telephoto perpective, looking south toward midspan and south anchor ...

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

    480-mm telephoto perpective, looking south toward mid-span and south anchor arm. - Pittsburgh & Lake Erie Railroad, Ohio River Bridge, Spanning Ohio River, West of Beaver River, Beaver, Beaver County, PA

  13. 77 FR 75016 - Safety Zone: Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-19

    ...-AA00 Safety Zone: Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and... final rule establishing a safety zone around the Gilmerton Bridge center span barge. Inadvertently, this... Gilmerton Bridge center span barge (77 FR 73541). Inadvertently, this rule included an error in the...

  14. Volcano hazards in the Mount Hood region, Oregon

    USGS Publications Warehouse

    Scott, W.E.; Pierson, T.C.; Schilling, S.P.; Costa, J.E.; Gardner, C.A.; Vallance, J.W.; Major, J.J.

    1997-01-01

    Mount Hood is a potentially active volcano close to rapidly growing communities and recreation areas. The most likely widespread and hazardous consequence of a future eruption will be for lahars (rapidly moving mudflows) to sweep down the entire length of the Sandy (including the Zigzag) and White River valleys. Lahars can be generated by hot volcanic flows that melt snow and ice or by landslides from the steep upper flanks of the volcano. Structures close to river channels are at greatest risk of being destroyed. The degree of hazard decreases as height above a channel increases, but large lahars can affect areas more than 30 vertical meters (100 vertical feet) above river beds. The probability of eruption-generated lahars affecting the Sandy and White River valleys is 1-in-15 to l-in-30 during the next 30 years, whereas the probability of extensive areas in the Hood River Valley being affected by lahars is about ten times less. The accompanying volcano-hazard-zonation map outlines areas potentially at risk and shows that some areas may be too close for a reasonable chance of escape or survival during an eruption. Future eruptions of Mount Hood could seriously disrupt transportation (air, river, and highway), some municipal water supplies, and hydroelectric power generation and transmission in northwest Oregon and southwest Washington.

  15. 76 FR 70397 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-14

    ... the Ohio River +549 +550 Town of Fort Gay, Unincorporated Areas of Wayne County. confluence. At the... of Fort Gay. Fork). confluence to approximately 1.1 miles upstream of the Tug Fork confluence. Tug Fork At the Big Sandy River +576 +575 Town of Fort Gay. confluence. Approximately 0.5 mile +577 +575...

  16. 77 FR 73541 - Safety Zone: Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-11

    ...-AA00 Safety Zone: Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and... Gilmerton Bridge Center Span Float- in and bridge construction of span placement. This action is intended to... rulemaking (NPRM) proposing a safety zone in the Gilmerton Bridge Area (77 FR 43557) on September 5-9, 2012...

  17. Development and Cause of Aeolian Desertification in Alpine Region-In Case of Maqu County in the Source of Yellow River

    NASA Astrophysics Data System (ADS)

    Lu, Junfeng; Qian, Quangqiang; Luo, Wanyin; Dong, Zhibao

    2016-04-01

    Maqu county locates in the northeast of Qinghai-Tibetan Plateau, which main native vegetation is alpine meadow. It was suffered severe desertification in recent years. In this study, we used Landsat images to investigate development of desertification. The result showed that the area of desertification land increased significantly, patch numbers and patch area of desertified land also increased from 1975-1990, the increased desertified land mainly converted from grassland. The degree of desertification also increased from 1990-2000, mainly because fixed sandy land converted to mobile sandy land and semi-fixed sandy land. The area of desertification land decreased from 2000-2010, the desertification land mainly converted to low coverage grassland. The reason responsible for desertification development including natural factors, such as temperature increased, the Yellow River runoff decreased, rodents and pests damage, and unreasonable management measures, such as long-time overgrazing, digging turf for building fence and herbs. In the beginning of this century, the implementation of ecological restoration project was main reason responsible for desertification reversion.

  18. 13. AERIAL VIEW LOOKING EASTWARDS AT THE WESTERN SPANS OF ...

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

    13. AERIAL VIEW LOOKING EASTWARDS AT THE WESTERN SPANS OF THE BRIDGE. THE PIERS ARE REINFORCED ON THE UPSTREAM SIDE TO PROTECT THE STRUCTURE FROM DAMAGE FROM ICEFLOES, DEBRIS, ETC. - Susquehanna River Bridge, Spanning Susquehanna River, Havre de Grace, Harford County, MD

  19. Cultural Resources Inventory of Lands Adjacent to Big Sandy Lake. Volume 1,

    DTIC Science & Technology

    1979-01-18

    population density. Late Prehistoric: 300 - 1640 A.D. Intensive wild rice -bison economic systems; St. Croix, Kathio, Clam River, Balckduck and Sandy...type are located on W- streams and near lake outlets that tend to be good wild rice harvesting .1. areas. Projectile points are either ososceles...triangular br side-notched points. The subsistence pattern of these people is that of hunting deer and smaller mammals and wild rice gathering. The time

  20. Assessment of chemical and biological significance of arsenical compounds in the Maurice River drainage basin (N. J. ). Part III. Transformations in aerobic and anaerobic conditions

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Faust, S.D.; Winka, A.J.; Belton, T.

    1987-01-01

    A quiescent reservoir system revealed the effects of temperature (20/sup 0/C. and 30/sup 0/C), oxygen levels (aerobic and anaerobic) on the arsenic partitioning and interconversion in organic and sandy lake sediments. Temperature had little or no effect on the specie partitioning. In aerobic reservoirs (sandy and organic), the As(V) levels increased, especially in the organic sediment. In the anaerobic reservoir, the organic sediment maintained its level of As(III). The sandy sediment has a predominance of As(V) suggesting something other than the level of oxygen is a significant controlling factor.

  1. Interglacial-glacial cycles recorded in the deposit sequence at Kruzhyky on the Dniester River (East Carpathian Foreland)

    NASA Astrophysics Data System (ADS)

    Łanczont, Maria; Boguckyj, Aandrij; Mroczek, Przemysław; Zieliński, Paweł; Jacyszyn, Andrij; Pidek, Agnieszka I.; Urban, Danuta; Kulesza, Piotr; Hołub, Beata

    2010-01-01

    Palaeogeographic investigations were carried out in the Kruzhyky site, which is situated in the East Carpathian Foreland, in the Dniester River valley, on the terrace 5 composed of the Mesopleistocene fluvial, glacigenic and aeolian deposits (Figs 1 and 2). These deposits are exposed along the section about 150 m long of the 15-17-metre-high river bank. In the undercutting of the Dniester River high bank the following five deposit complexes were described (Figs 3 and 4): 1. Fluvial complex-gravelly-sandy fining-up sequence. The Carpathian gravels with massive structure or faint horizontal stratification are covered by gravelly sands and sands with trough cross-stratification. They are overlain by sands and silts with ripple lamination merging into flaser lamination. These sediments were deposited as a result of rapid fall of flood in gravel-bed braided river. Gravel fractions represent deposition in longitudinal bars during high-energy flood flows, and sandy-gravelly and sandy-silty fractions-in channels between bars during waning flow (in the lower flow regime), at low river stages. 2. Fluvial-flood complex-package of alternating deformed clays with massive structure or faint lamination and silts with horizontal lamination. A lens, separated by erosion surface, occurs laterally. It is mostly composed of non-carbonate clays with numerous plant macroremnants, strongly gleyed, with interbeddings of sand. The silty-clayey complex was deposited from suspension, most probably after floods in depressions on floodplain. The lens of organogenic material (Fig. 5, Tables 3 and 4) is probably the result of deposition in cut off shallow channel (a kind of muddy depression) with periodically active weak flow. Based on the palaeobiological (pollen, macroremnants, Ostracoda) analyses of the deposits filling the reservoir, we find that it existed in cold climate and was surrounded with scarce sedge vegetation. 3. Proglacial complex-sandy-silty rhythmite composed of sands with horizontal stratification and silts with horizontal or flaser lamination; single small-scale lithofacies of sands with trough cross-stratification occur in places; single gravel grains are numerous. Two deformation horizons are found: the higher one is characterized by the occurrence of folds and flexure deflections, and the lower one-involution structures and casts of ice wedges/fissures. This complex is probably the result of deposition on the distal part of flat, periodically inundated fluvioglacial fan connected with advancing ice sheet. 4. Ablation complex-sandy or sandy-silty diamicton occurring as isolated inserts, lenses or tongues. Its lower boundary is sharp, erosional and uneven (concave). This complex represents flows of supraglacial tills, which strongly deformed the deposits of the underlying complex 3. 5. Aeolian complex-silty (loess) and sandy-silty (Table 1) deposits with distinct traces of intensive, postsedimentary alterations of pedogenesis of different ages (Tables 1 and 2). It is composed of two soil units separated by thin, primary loess layer: a) older, well-developed paleosol with several pedofeatures very typical of the Sokal (Mazovian) soil; b) younger unit developed as pedocomplex consisting of two mature soils, the upper of which ("modern" neosol) is formed in the top of relict and exhumed paleosol. The described paleosols should be recognized as at least two soils of different ages and of interglacial rank, developed in periglacial loess-like deposits. The Kruzhyky profile is unique in the Dniester River valley. On account of its situation, it supplements the former information about the terrace 5 structure, which has been determined in detail in the Halyč site. And what is most important, it is the only site on the terrace 5 where glacial deposits were found. Lithofacial analysis carried out in the profile enables us to reconstruct the following events reflecting interglacial-glacial cycles: 1. The lowest, gravelly-sandy unit indicates the functioning of warm (probably interglacial) braided river flowing from the Carpathians to the east; 2. The continuous clayey-silty-loamy sequence represents periglacial-glacial environment connected with the ice-sheet advance from the west or north-west on the examined area. Based on the presented data, we can only find that the ice-sheet front occurred at a distance of about 4-5 km from the Kruzhyky profile, and it was its maximum extent in Central Europe; 3. The loess-soil sequence of varied structure, which covers older paleorelief, represents two cycles of loess accumulation in periglacial environment and at least two pedogenesis cycles. Based on the described deposit sequence, we can verify the regional stratigraphic scheme (Fig. 6), and especially elaborate anaglacial phase.

  2. 33 CFR 80.712 - Morris Island, SC to Hilton Head Island, SC.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Edisto River Entrance to the shore of Botany Bay Island. (d) A line drawn from the microwave antenna..., SC to Hilton Head Island, SC. (a) A straight line drawn from the seaward tangent of Folly Island through across Stono River to the shoreline of Sandy Point. (b) A straight line drawn from the seaward...

  3. 33 CFR 80.712 - Morris Island, SC to Hilton Head Island, SC.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Edisto River Entrance to the shore of Botany Bay Island. (d) A line drawn from the microwave antenna..., SC to Hilton Head Island, SC. (a) A straight line drawn from the seaward tangent of Folly Island through across Stono River to the shoreline of Sandy Point. (b) A straight line drawn from the seaward...

  4. 78 FR 61621 - Endangered and Threatened Wildlife and Plants; Proposed Threatened Status for the Western...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-03

    ... length, depth of upper mandible, and wing length) of almost 700 specimens of adult yellow-billed cuckoos... wing length, bill length, and mandible depth; and (3) no statistically significant differences for... west side of the Cascades at the Sandy River Delta near its confluence with the Columbia River in July...

  5. 35. ALTERNATE DESIGN USING THROUGH ARCH SPANS, WITH ARCH REPEATED ...

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

    35. ALTERNATE DESIGN USING THROUGH ARCH SPANS, WITH ARCH REPEATED BETWEEN TOWER LEGS, AND ASHLAR MASONRY WALLS AND PYLONS Pen-and-ink drawing by project architect Alfred Eichler, 1934. - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  6. 1857 PatentExtant Construction Comparison Powerscourt Bridge, Spanning Chateauguay River, ...

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

    1857 Patent-Extant Construction Comparison - Powerscourt Bridge, Spanning Chateauguay River, First Concession Road, Elgin/Hichinbrooke, Huntingdon County, Quebec, Canada, Chateaugay, Franklin County, NY

  7. Hydrodynamic sorting and transport of terrestrially derived organic carbon in sediments of the Mississippi and Atchafalaya Rivers

    NASA Astrophysics Data System (ADS)

    Bianchi, Thomas S.; Galler, John J.; Allison, Mead A.

    2007-06-01

    Over the course of two years, four cruises were conducted at varying levels of discharge in the lower Mississippi and Atchafalaya Rivers (MR and AR) where grab samples were collected from sand- and mud-dominated sediments. The tetramethylammonium hydroxide (TMAH) thermochemolysis method was used to determine sources of terrestrially derived organic carbon (OC) in these two sediment types, to examine the effects of hydrodynamic sorting on lignin sources in river sediments. Average lignin concentrations in the lower MR were 1.4 ± 1.1 mg gOC -1 at English Turn (ET) and 10.4 ± 27.4 mg gOC -1 at Venice. Using these concentrations, annual lignin fluxes to the Gulf of Mexico, from tidal and estuarine mud remobilization at ET and Venice, were 3.1 ± 2.5 × 10 5 kg and 11.4 ± 30.0 × 10 5 kg, respectively. Much of the lignin-derived materials in muddy sediments appeared to be derived from non-woody grass-like sources - which should decay more quickly than the woody materials typically found in the sandy deposits. The average total OC% (1.93 ± 0.47) of English Turn sands yields an annual flux of 0.34 ± 0.09 × 10 9 kg. Lignin flux in the English Turn sands (3.6 ± 2.6 mg gC -1) using the numbers above would be 12.2 ± 9.4 × 10 5 kg. The extensive amounts of sand-sized woody materials (coffee-grinds) found in the sandy sediments in both the AR and MR are likely derived from woody plant materials. This is the first time it has been demonstrated that sandy sediments in the MR provide an equally important pathway (compared to muds) for the transport of terrestrially derived organic matter to the northern Gulf of Mexico. Using the AR average %OC in sand (1.16 ± 0.72), we estimated an annual flux of OC to the shelf of 0.13 ± 0.07 × 10 9 kg. Lignin flux for AR sands was estimated to be 12.4 ± 12.1 × 10 5 kg. Despite the high error associated with these numbers, we observe for the first time that the flux of lignin in sandy sediments in the AR to the northern Gulf of Mexico is comparable to that found in the MR. These results further support the likelihood of grain-size related hydrodynamic sorting of terrestrially derived organic carbon in the lower Mississippi and Atchafalaya Rivers, suggesting that there is a distinct sandy sediment organic fraction contributed by major rivers to the global carbon cycle.

  8. 39. PENCIL SKETCH OF SELECTED DESIGN, DEPICTING OCEANGOING VESSEL (WHICH ...

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

    39. PENCIL SKETCH OF SELECTED DESIGN, DEPICTING OCEAN-GOING VESSEL (WHICH WERE STILL NAVIGATING SACRAMENTO RIVER IN 1930s) APPROACHING LIFT SPAN Drawn by project architect Alfred Eichler, 1935 - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  9. Archeological Reconnaissance in the Big Sandy Drainage Basin: An Empirical Approach to Investigating Settlement in East Texas.

    DTIC Science & Technology

    1982-05-01

    Archaeology Prehistory History Wood and Upshur Counties, TX Sabine River Basin Big Sandy Creek Northeast Texas 2.. AmTWACT (= tkmsme vm * i P Inf1 eG417 o...watershed, Wood and Upshur counties, East Texas. Although very few details of the project area were known prior to field work, it was anticipated to have been...Mineola office) were also helpful. Mr. Max Baker, County Agent for Wood County, divulged useful information. Local residents were exceptionally helpful in

  10. Cairo, Egypt/Nile River viewed from STS-66 Atlantis

    NASA Image and Video Library

    1994-11-14

    This close-up view of the intensively cultivated Nile River flood plain near Cairo presents a sharp color contrast to the virtually non-vegetated, sandy desert, located to the west of the vegetated area. Some rectangular cultivated field patterns, as well as circular center pivot irrigation patterns, can be observed northwest of the Nile River flood plain. The world famous Giza Pyramids are located near the center of this photography (see highly reflective sand surfaces).

  11. Directed evolution of adaptive traits

    USDA-ARS?s Scientific Manuscript database

    As a species, switchgrass is adapted to an amazingly broad range of environments, spanning hardiness zones ranging from HZ3 to HZ9 (Canada to Mexico), from the mid-grass prairie to the Atlantic Seaboard, from sandy soils to heavy clay soils, from acid to alkaline soils, and from wetland to dryland h...

  12. 78 FR 36654 - Drawbridge Operation Regulation; Neches River, Beaumont, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-19

    ... that governs the Kansas City Southern vertical lift span bridge across the Neches River, mile 19.5, at Beaumont, Texas. The deviation is necessary to replace the north vertical lift joints on the bridge. This... of the vertical lift span bridge across the Neches River at mile 19.5 in Beaumont, Texas. The...

  13. 78 FR 29020 - Drawbridge Operation Regulation; Neches River, Beaumont, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-17

    ... that governs the Kansas City Southern vertical lift span bridge across the Neches River, mile 19.5, at Beaumont, Texas. The deviation is necessary to replace the north vertical lift joints on the bridge. This... of the vertical lift span bridge across the Neches River at mile 19.5 in Beaumont, Texas. The...

  14. Streambed peat lenses as redox-reactivity hotspots in lowland river hyporheic zones

    NASA Astrophysics Data System (ADS)

    Naden, Emma; Krause, Stefan; Cassidy, Nigel

    2010-05-01

    Hyporheic zones, as the direct interfaces between aquifers and rivers, are often characterised by increased redox reactivity and chemical transformation capacity. Depending on redox conditions and reaction types, hyporheic mixing of groundwater and surface water can lead to either attenuation or enrichment of pollutants or nutrients with diametrical implications for in-stream and aquifer hydro-ecological status. This study combines geophysical methods with distributed temperature sensor networks and nested multi-level sampling and analysis of hyporheic redox conditions and nutrient concentrations to investigate the reactive transport of nitrate at the aquifer-river interface of a UK lowland river. In stream Electric Resistivity Tomography and Ground Penetrating Radar (including core based ground truthing) have been applied to map the complex spatial patterns of highly conductive sandy and gravely sediments in contrast to semi-confining, low conductivity peat lenses which have been found to be characteristic for most lowland rivers. Reach scale (1km) spatial patterns and temporal dynamics of aquifer-river exchange have been identified by heat tracer experiments based on fibre-optical Distributed Temperature Sensing techniques combined with vertical thermocouple-arrays for tracing hyporheic flow paths. Spatial patterns of hyporheic redox conditions, dissolved oxygen (DO) and organic carbon (DOC) content as well as concentrations of major anions have been monitored in 48 nested multi-level mini-piezometers. Our investigations indicate that streambed temperature patterns were dominantly controlled by groundwater up-welling, causing cold spots in sandy and gravely sediments with high up-welling rates and low hyporheic residence times and warmer areas at the streambed surface where groundwater - surface water exchange was inhibited by streambed peat lenses. The flow-inhibiting peat structures have been found to cause semi-confined conditions in the up-welling groundwater, resulting in long residence times and increased redox-reactivity. Anoxic conditions and high DOC contents combined with long residence times underneath peat layers cause highly efficient denitrification rates, reducing nitrate concentrations from > 50mg/l to below the level of detection. In contrast, sandy and gravely areas of fast groundwater up-welling where characterized by only marginal changes in nitrate concentrations. The investigations lead to the development of a conceptual model of aquifer - river exchange and hyporheic reactivity in lowland rivers including temperature traceable hyporheic reactivity hotspots with high denitrification potential. The results for this exemplary field site highlight the substantial nutrient attenuation capacity of hyporheic zones at lowland rivers and emphasize the great importance of their consideration for river restoration programs and the assessment of water quality and ecological status.

  15. Phase transition behavior of sediment transport at the sand-mud interface, across scales from flumes to the large rivers

    NASA Astrophysics Data System (ADS)

    Ma, H.; Nittrouer, J. A.; Wu, B.; Zhang, Y.; Mohrig, D. C.; Lamb, M. P.; Wang, Y.; Fu, X.; Moodie, A. J.; Naito, K.; Parker, G.

    2017-12-01

    Sediment dispersal and deposition creates deltaic landscapes, establishes coastlines, and produces fertile floodplains, all of which serve as critical landforms inhabited by a large proportion of humankind. If poorly managed, sediment loads in these environments can elevate and clog channels, thereby enhancing hazards such as severe flooding. Predictive descriptions of sediment loads, however, are not well constrained, especially for fine-grained (silt and very-fine sand) dispersal systems, which often include river deltas and coastlines. Here, we show efforts to collect and analyze an extensive sediment load database for fine-grained channels, spanning from small flume experiments to large rivers, in order to evaluate the nature of sediment flux. Our analyses determined that sediment transport exhibits two distinct transport phases, separated by a discontinuous transition, whereby sediment flux differs by one to two orders of magnitude. It is determined that the transition responds to the bed material grain size, and we propose a phase diagram based on this metric alone. These findings help elucidate why previous theories of sediment transport at the sand-silt interface, which are typically continuous, are not able to give satisfactory predictions across different scales and environments. Our work serves to help evaluate anthropic influences on rivers, deltas, and coastlines, and can be applied to better constrain sediment flux of paleo-fluvial systems found on Earth and Mars. For example, in situ measurements of sediment flux for the silty-sandy bed of the lower Yellow River, China, validate the aforementioned phase transition behavior, and illustrate that the channel resides near the transition of high to low efficiency transport modes. Recent dam construction and resulting downstream coarsening of the bed via armoring, however, might lead to the unintended consequence of enhancing flood risk by driving the system to a low efficiency transport mode with high resistance to sediment-laden flow, which in turn will elevate the water stage under the same flood discharge.

  16. 4. View of Clark Fork Vehicle Bridge facing northeast. Bridge ...

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

    4. View of Clark Fork Vehicle Bridge facing northeast. Bridge from south shoreof Clark Fork River showing 4 spans. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  17. 77 FR 25889 - Drawbridge Operation Regulations; Niantic River, Niantic, CT

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-02

    ... 20 nights to facilitate completion of work on machinery and the lift span. DATES: This deviation is... completion of machinery installation and lift span work at the new Niantic River RR Bridge. To facilitate...

  18. Evolution of mud-capped dredge pits following excavation: sediment trapping and slope instability

    NASA Astrophysics Data System (ADS)

    Obelcz, J.; Xu, K.; Bentley, S. J.; Li, C.; Miner, M. D.; O'Connor, M. C.; Wang, J.

    2016-02-01

    Many fluvial channels incised the Northern Gulf of Mexico inner continental shelf during the late Quaternary. Mud-capped dredge pits (MCDPs), which are generally elongate and deep (8-10 m) excavations, target sandy fluvial channel deposits for coastal restoration projects. The morphological evolution of dredge excavations in noncohesive sandy substrate is well studied, but MCDPs have up to a several-meter-thick veneer of Holocene shelf mud overlying sandy channel deposits. This stratigraphy is hypothesized to result in more complex post-dredge morphology than pit walls simply slumping to the angle of repose shortly after excavation. Numerical modeling of MCDP post-dredge response conducted prior to excavation indicates pit walls may retrogressively fail, which is accounted for in pit design by assigning no-dredge setback buffers from pipelines or cultural and environmental resources. To validate model results and test effectiveness of setback buffers, a geophysical survey of the Sandy Point MCDP (20 km west of the Mississippi River Delta in 10m deep water), where 1.7 million m3 of sandy sediment was excavated in 2012, was conducted May 2015. A total of 84 line-km of high-resolution chirp subbottom and a 27 km2 grid of swath bathymetry and sidescan sonar were collected. The data indicate the dredge pit walls are differentially slumping, with the western pit wall in a more active state of failure than the eastern wall. The western failures morphologically resemble features observed along the muddy Mississippi River Delta Front at water depths of 20-100 m, including bowl-shaped collapse failures and retrogressive stair-stepped slumps; these failures may play a key role in evaluating the distance of setback buffer zone to pipelines. These features indicate the cohesive mud overlying the sandy infill has a prominent role in pit wall stability. A 0.5-1 m thick acoustically transparent package overlies the entire pit floor (interpreted as a possible fluid mud layer), overlying 1-3 m of post-dredge deposition that is concentrated along the western wall and center of the pit. The Sandy Point MCDP lies within a clockwise gyre, and its relief may serve as a significant trap of suspended sediment. These findings emphasize the role MCDPs play in sediment dynamics as well as their potential for submarine geohazards.

  19. Geomorphology of the Chippewa River delta of Glacial Lake Saginaw, central Lower Michigan, USA

    NASA Astrophysics Data System (ADS)

    Connallon, Christopher B.; Schaetzl, Randall J.

    2017-08-01

    We introduce, characterize, and interpret the geomorphic history of a relict, Pleistocene-aged delta of the Chippewa River in central Lower Michigan. The broad, sandy Chippewa delta developed into various stages of Glacial Lake Saginaw, between ca. ≈ 17 and 15 ka·BP (calibrated ages). Although the delta was first identified in 1955 on a statewide glacial geology map, neither its extent nor its Pleistocene history had been previously determined. The delta is typically forested, owing to its wet, sandy soils, which stand out against the agricultural fields of the surrounding, loamy lake plain sediments. The delta heads near the city of Mt Pleasant and extends eastward onto the Saginaw Lowlands, i.e., the plain of Glacial Lake Saginaw. Data from 3285 water well logs, 180 hand augered sites, and 185 points randomly located in a GIS on two-storied (sand over loam) soils were used to determine the extent, textural properties, and thickness of the delta. The delta is ≈ 18 km wide and ≈ 38 km long and is sandy throughout. Deltaic sediments from neighboring rivers that also drained into Glacial Lake Saginaw merge with the lower Chippewa delta, obscuring its boundary there. The delta is thickest near the delta's head and in the center, but thins to 1-2 m or less on its eastern margins. Mean thicknesses are 2.3-2.9 m, suggestive of a thin sediment body, frequently impacted by the waves and fluctuating waters of the lakes. Although beach ridges are only weakly expressed across the delta because of the sandy sediment, the coarsest parts of the delta are generally coincident with some of these inferred former shorezones and have a broad, incised channel that formed while lake levels were low. The thick upper delta generally lies above the relict shorelines of Glacial Lakes Saginaw and Arkona (≈ 17.1 to ≈ 16 ka·BP), whereas most of the thin, distal delta is associated with Glacial Lake Warren (≈ 15 ka·BP). Together, these data suggest that the Chippewa delta formed and prograded as lake levels in the Saginaw Lowlands alternated and episodically fell. The result is a delta that is comparatively thin, expansive, and sandy. In some places, these sands have subsequently been reworked into fields of small parabolic dunes.

  20. Initial fluvial response to the removal of Oregon's Marmot Dam

    Treesearch

    Jon J. Major; Jim E. O' Connor; Gordon E. Grant; Kurt R. Spicer; Heather M. Bragg; Abagail Rhode; Dwight Q. Tanner; Chauncey W. Anderson; J. Rose Wallick

    2008-01-01

    A temporary, 14-meter-high earthen cofferdam standing in place of Marmot Dam was breached on 19 October 2007, allowing the 80-kilometer-long Sandy River to flow freely from Mount Hood, Oregon, to the Columbia River for the first time in nearly 100 years. Marmot Dam is one of the largest dams in the Western United States (in terms of height and volume of stored sediment...

  1. 2. View of Clark Fork Vehicle Bridge facing northeast. Bridge ...

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

    2. View of Clark Fork Vehicle Bridge facing northeast. Bridge from south shore of Clark Fork River showing 4 1/2 spans. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  2. 7. View of Clark Fork Vehicle Bridge facing northwest. Bridge ...

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

    7. View of Clark Fork Vehicle Bridge facing northwest. Bridge from south shore of Clark Fork River showing 4 1/2 spans. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  3. 19. Stress sheet for the river span dated 7/13/12; revised ...

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

    19. Stress sheet for the river span dated 7/13/12; revised Oct. 18 and 21, 1912. Drawing courtesy Office of the Cuyahoga County Engineer, Cleveland, Ohio. - Detroit Superior High Level Bridge, Cleveland, Cuyahoga County, OH

  4. Constraining Depositional Slope From Sedimentary Structures in Sandy Braided Streams

    NASA Astrophysics Data System (ADS)

    Lynds, R. M.; Mohrig, D.; Heller, P. L.

    2003-12-01

    Determination of paleoslopes in ancient fluvial systems has potentially broad application to quantitatively constraining the history of tectonics and paleoclimate in continental sequences. Our method for calculating paleoslopes for sandy braided streams is based upon a simple physical model that establishes depositional skin-frictional shear stresses from assemblages of sedimentary structures and their associated grain size distributions. The addition of a skin-frictional shear stress, with a geometrically determined form-drag shear stress results in a total boundary shear stress which is directly related to water-surface slope averaged over an appropriate spatial scale. In order to apply this model to ancient fluvial systems, it is necessary to measure the following: coarsest suspended sediment size, finest grain size carried in bed load, flow depth, dune height, and dune length. In the rock record, suspended load and bed load can be accurately assessed by well-preserved suspended load deposits ("low-energy" ripples) and bed load deposits (dune foresets). This model predicts an average slope for the North Loup River near Taylor, Nebraska (modern case study) of 2.7 x 10-3. The measured reach-averaged water surface slope for the same reach of the river is 1.37 x 10-3. We suggest that it is possible to calculate the depositional slope of a sandy fluvial system by a factor of approximately two. Additionally, preliminary application of this model to the Lower Jurassic Kayenta Formation throughout the Colorado Plateau provides a promising and consistent evaluation of paleoslope in an ancient and well-preserved, sandy braided stream deposit.

  5. 20. Detail view of west swing span abutment through swing ...

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

    20. Detail view of west swing span abutment through swing span truss, looking north - India Point Railroad Bridge, Spanning Seekonk River between Providence & East Providence, Providence, Providence County, RI

  6. 25. VIEW OF McGREGOR BRIDGE (18811936), CROSSING THE MERRIMACK RIVER ...

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

    25. VIEW OF McGREGOR BRIDGE (1881-1936), CROSSING THE MERRIMACK RIVER AT BRIDGE STREET, LOOKING SOUTHEAST. NORTH ELEVATION OF DOUBLE-DECKED, THREE-SPAN DOUGLAS PATENT PARABOLIC IRON TRUSS ERECTED BY CORRUGATED METAL COMPANY (BERLIN IRON BRIDGE COMPANY, BERLIN, CT) From 'Bridge Street Bridge', photographer and date unknown. - Notre Dame Bridge, Spanning Merrimack River on Bridge Street, Manchester, Hillsborough County, NH

  7. 34. ALTERNATE DESIGN USING BATTERED AND UNSHEATHED LIFT TOWERS, WITH ...

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

    34. ALTERNATE DESIGN USING BATTERED AND UNSHEATHED LIFT TOWERS, WITH DEEPENED TRUSS ON LIFT SPAN. Pen-and-ink drawing by project architect Alfred Eichler, 1934. - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  8. 1. View of Clark Fork Vehicle Bridge facing west. Panorama ...

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

    1. View of Clark Fork Vehicle Bridge facing west. Panorama showing the entire span of bridge from north shore of the Clark Fork River. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  9. 12. DETAIL VIEW OF BRIDGE, SHOWING SPRING LINE OF SPANS ...

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

    12. DETAIL VIEW OF BRIDGE, SHOWING SPRING LINE OF SPANS FROM CROWN OF MID-CHANNEL PIER, PAIRED COLUMNS SUPPORTING DECK, ARCHED WINDOW RAILING, LOOKING WEST-NORTHWEST FROM EUREKA SOUTHERN RAILROAD BRIDGE. CABLES VISIBLE IN BACKGROUND ARE EARTHQUAKE RESTRAINERS RETROFITTED TO 1952 HIGHWAY BRIDGE, WHICH FUNCTIONED AS DESIGNED IN APRIL 1992 TEMBLOR - Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 101, Alton, Humboldt County, CA

  10. Contribution of phytoplankton and benthic microalgae to inner shelf sediments of the north-central Gulf of Mexico

    NASA Astrophysics Data System (ADS)

    Grippo, M. A.; Fleeger, J. W.; Rabalais, N. N.; Condrey, R.; Carman, K. R.

    2010-03-01

    Marine sediment may contain both settled phytoplankton and benthic microalgae (BMA). In river-dominated, shallow continental shelf systems, spatial, and temporal heterogeneity in sediment type and water-column characteristics (e.g., turbidity and primary productivity) may promote spatial variation in the relative contribution of these two sources to the sediment organic matter pool available to benthic consumers. Here we use photosynthetic pigment analysis and microscopic examination of sediment microalgae to investigate how the biomass, composition, and degradation state of sediment-associated microalgae vary along the Louisiana (USA) inner shelf, a region strongly influenced by the Mississippi River. Three sandy shoals and surrounding muddy sediments with depths ranging from 4 to 20 m were sampled in April, August, and October 2007. Pigment composition suggested that sediment microalgae were primarily diatoms at all locations. We found no significant differences in sediment chlorophyll a concentrations (8-77 mg m -2) at the shoal and off-shoal stations. Epipelic pennate diatoms (considered indicative of BMA) made up a significantly greater proportion of sediment diatoms at sandy (50-98%) compared to more silty off-shoal stations (16-56%). The percentage of centric diatoms (indicators of settled phytoplankton) in the sediment was highest in August. Sediment total pheopigment concentrations on sandy stations (<20 mg m -2) were significantly lower than concentrations at nearby muddy stations (>40 mg m -2), suggesting differences in sediment microalgal degradation state. These observations suggest that BMA predominate in shallow sandy sediments and that phytodetritus predominates at muddy stations. Our results also suggest that the relative proportion of phytodetritus in the benthos was highest where phytoplankton biomass in the overlying water was greatest, independent of sediment type. The high biomass of BMA found on shoals suggests that benthic primary production on sandy sediments represents a potentially significant local source of sediment microalgal carbon that may be utilized by benthic consumers in continental shelf food webs.

  11. 5. View of Clark Fork Vehicle Bridge facing east. Bridge ...

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

    5. View of Clark Fork Vehicle Bridge facing east. Bridge from south shore of Clark Fork River-southernmost span. 1900-era Northern Pacific Railway Bridge in background. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  12. The late-glacial fluvial terrace t7 at Raunheim (lower River Main), Germany. Constraining the chronological placement by optical stimulated luminescence dating.

    NASA Astrophysics Data System (ADS)

    Thiemeyer, Heinrich; Kadereit, Annette; Zipf, Lars; Flettner, Stephan

    2017-04-01

    The lower River Main valley exhibits up to seven fluvial terrace levels (t1 - t7, according to the stratigraphy of Semmel 1969). The lowermost terrace (t7) represents the most recently formed level which due to stratigraphical considerations is assumed to be of Late Pleistocene age (Semmel 1969). However, the chronological placement of the terrace has not been determined by numerical dating so far. The area was apparently roamed by Late Palaeolithic people as evidenced by artefacts which were discovered on a former sandy river bank between 87 m and 91 m above sea level on top of the t7 east of the town of Raunheim. We took this opportunity to open four trenches in order to localize additional in situ Palaeolithic artefacts and to investigate the stratigraphy of the sediments and soils and, for the first time, to provide numerical ages in order to narrow down the period of the t7 activity. Eight samples from three profiles in three of the trenches were collected for optical stimulated (OSL) dating. OSL dating occurred applying a blue light stimulated luminescence (BLSL) single aliquot regeneration (SAR) protocol (Murray & Wintle 2000) to small aliquots (few 102 grains) of quartz coarse grain separates (125 - 212 µm). The trenches showed that the t7 sediments consist of fluvial sand over gravel. They are overlain by calcareous loamy and sandy overbank deposits. At the investigated site the Holocene Cambisol at the surface passes into a Gleysol that has developed in a palaeochannel which is incised into the t7. The trenches revealed further that only parts of the Late Palaeolithic site are in situ and therefore contemporaneous with the fluvial sediments beneath the Cambisol. The upper part of the sections consists of colluvial deposits lying on truncated Cambisols. The OSL dating places the section into the period spanning the last glacial maximum (LGM) / late glacial to the late Holocene. The oldest investigated fluvial t7 sediments date around 24.7 ka. Slightly younger ages, around ca. 17 ka and ca. 14 ka, indicate that fluvial activity continued into late glacial times and that the deposits were last partly reworked. The colluvial deposits date from approximately 5000 BP until today reflecting the long lasting agricultural use of the old settled river terraces on the lower River Main. A peat layer indicates that the channel in the t7 was still active in Holocene times and finally filled only in the Middle Ages, according to palynological investigations. Murray, A.S. & Wintle, A.G. (2000): Luminescence dating of quartz using an improved single aliquot regenerative-dose protocol. - Radiation Measurements 32: 57-73. Semmel, A. (1969): Quartär. - Erl. Geologische Karte von Hessen 1:25000 Blatt 5916 Hochheim a. Main, 3. Aufl., 209 pp., Wiesbaden.

  13. Archaeological Investigations in the Halls-Fowlkes Region South Fork of the Forked Deer River, West Tennessee

    DTIC Science & Technology

    1985-01-01

    Obion-Forked Deer River and Reelfoot -Indian Creek drainages (Smith 1979a), the Mud Creek drainage (Dye 1975), the Cypress Creek drainages (Peterson 1975...sites have been identified by the presence of Palmer, Cypress Creek, Lost Lake , Decatur, Kirk Stemmed, Big Sandy, Plevna, Haywood, Kirk Corner Notched...necessary to clarify this problem. Several different Mississippian phases, including the Walls, Boxtown, Ensley, Tiptonville and Reelfoot phases have

  14. Modeling and measuring the relationships between sediment transport processes, alluvial bedforms and channel-scale morphodynamics in sandy braided rivers.

    NASA Astrophysics Data System (ADS)

    Nicholas, A. P.; Ashworth, P. J.; Best, J.; Lane, S. N.; Parsons, D. R.; Sambrook Smith, G.; Simpson, C.; Strick, R. J. P.; Unsworth, C. A.

    2017-12-01

    Recent years have seen significant advances in the development and application of morphodynamic models to simulate river evolution. Despite this progress, significant challenges remain to be overcome before such models can provide realistic simulations of river response to environmental change, or be used to determine the controls on alluvial channel patterns and deposits with confidence. This impasse reflects a wide range of factors, not least the fact that many of the processes that control river behaviour operate at spatial scales that cannot be resolved by such models. For example, sand-bed rivers are characterised by multiple scales of topography (e.g., dunes, bars, channels), the finest of which must often by parameterized, rather than represented explicitly in morphodynamic models. We examine these issues using a combination of numerical modeling and field observations. High-resolution aerial imagery and Digital Elevation Models obtained for the sandy braided South Saskatchewan River in Canada are used to quantify dune, bar and channel morphology and their response to changing flow discharge. Numerical simulations are carried out using an existing morphodynamic model based on the 2D shallow water equations, coupled with new parameterisations of the evolution and influence of alluvial bedforms. We quantify the spatial patterns of sediment flux using repeat images of dune migration and bar evolution. These data are used to evaluate model predictions of sediment transport and morphological change, and to assess the degree to which model performance is controlled by the parametrization of roughness and sediment transport phenomena linked to subgrid-scale bedforms (dunes). The capacity of such models to replicate the characteristic multi-scale morphology of bars in sand-bed rivers, and the contrasting morphodynamic signatures of braiding during low and high flow conditions, is also assessed.

  15. UNIDENTIFIED CATENARY SUSPENSION BRIDGE, SHOWING RIVETED METAL PIERS UNDER CONSTRUCTION. ...

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

    UNIDENTIFIED CATENARY SUSPENSION BRIDGE, SHOWING RIVETED METAL PIERS UNDER CONSTRUCTION. NOTE APPROACH SPANS OF PIPE CONSTRUCTION IN RIGHT BACKGROUND. 3/4 VIEW FROM BELOW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  16. 9. VIEW SHOWING JUNCTION OF CONCRETE EAST APPROACH SPAN WITH ...

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

    9. VIEW SHOWING JUNCTION OF CONCRETE EAST APPROACH SPAN WITH STEEL SPAN, LOOKING NORTH. NOTE ROCKING CAST STEEL SHOE ATTACHED TO PIER TO ALLOW FOR EXPANSION OF STEEL SPAN - Jensen Bridge, Spanning Green River at Town of Jensen, Jensen, Uintah County, UT

  17. 11. VIEW, LOOKING SOUTHEAST, ALONG CENTERLINE FROM SOUTH CANTILEVER TOWARD ...

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

    11. VIEW, LOOKING SOUTHEAST, ALONG CENTERLINE FROM SOUTH CANTILEVER TOWARD TOWARD NORTH PORTAL. Note vertical displacement in deck caused by partial collapse at point of connection between south cantilever arm and suspended span. - Smith River Bridge, CA State Highway 199 Spanning Smith River, Crescent City, Del Norte County, CA

  18. The Assessment of Children's M-Space.

    ERIC Educational Resources Information Center

    Romberg, Thomas A.; Collis, Kevin F.

    The purpose of this study was to identify the working memory capacity (M-space) for a group of 139 children (4 to 8 years of age) enrolled at Sandy Bay Infant School in Hobart, Tasmania, Australia. Four M-space tests -- The Counting Span Test (Case and Kurland, 1978), Mr. Cucui Test (DeAvila and Havassy, 1974), the Digit Placement Test (Case,…

  19. Stable isotope hydrology in fractured and detritic aquifers at both sides of the South Atlantic Ocean: Mar del Plata (Argentina) and the Rawsonville and Sandspruit river catchment areas (South Africa)

    NASA Astrophysics Data System (ADS)

    Glok Galli, Melisa; Damons, Matthew E.; Siwawa, Sitembiso; Bocanegra, Emilia M.; Nel, Jacobus M.; Mazvimavi, Dominic; Martínez, Daniel E.

    2017-01-01

    The aim of this work is to characterize the isotope composition of water (2H and 18O) in order to establish the relationship between fractured and detritic aquifers in similar hydrological environments located at both sides of the Atlantic Ocean. The Mar del Plata zone, placed in the Argentine Buenos Aires province in South America, and the Rawsonville and Sandspruit river catchment areas, situated in the Western Cape province in South Africa were compared. Rainwater and groundwater samples from fractured and detritic aquifers were analyzed through laser spectroscopy. In both Argentina and South African study sites, stable isotopes data demonstrate an aquifers recharge source from rainfall. For the Mar del Plata region, two different groups of detritic aquifer's samples with distinct recharge processes can be identified due to the close relationship existing between the present hydrogeological environments, the aquifer's grain size sediments and the isotopes contents: one representing rapid infiltration in aquifer sediments of the creeks' palaeobeds and hills zones (sandy or silt sandy sediments) and the other with slow infiltration of evaporated water in plain zones with an aquitard behavior. In the last group, the evaporation process occurs previous infiltration or in the aquifer's non-saturated zone, because of the existence of very low topographic gradients and fine-grained sediments. The evaporation phenomenon is not evident in the Sandspruit river catchment site's detritic aquifer, because its sandy composition allows a faster infiltration rate than in the loess that compounds the Pampeano aquifer in the interfluves zones of the Argentinian study area.

  20. Turbidite megabeds in an Oceanic Rift Valley recording jokulhlaups of late Pleistocene glacial lakes of the western United States

    USGS Publications Warehouse

    Zuffa, G.G.; Normark, W.R.; Serra, F.; Brunner, C.A.

    2000-01-01

    Escanaba Trough is the southernmost segment of the Gorda Ridge and is filled by sandy turbidites locally exceeding 500 m in thickness. New results from Ocean Drilling Program (ODP) Sites 1037 and 1038 that include accelerator mass spectrometry (AMS) 14C dates and revised petrographic evaluation of the sediment provenance, combined with high-resolution seismic-reflection profiles, provide a lithostratigraphic framework for the turbidite deposits. Three fining-upward units of sandy turbidites from the upper 365 m at ODP Site 1037 can be correlated with sediment recovered at ODP Site 1038 and Deep Sea Drilling Program (DSDP) Site 35. Six AMS 14C ages in the upper 317 m of the sequence at Site 1037 indicate that average deposition rates exceeded 10 m/k.yr. between 32 and 11 ka, with nearly instantaneous deposition of one ~60-m interval of sand. Petrography of the sand beds is consistent with a Columbia River source for the entire sedimentary sequence in Escanaba Trough. High-resolution acoustic stratigraphy shows that the turbidites in the upper 60 m at Site 1037 provide a characteristic sequence of key reflectors that occurs across the floor of the entire Escanaba Trough. Recent mapping of turbidite systems in the northeast Pacific Ocean suggests that the turbidity currents reached the Escanaba Trough along an 1100-km-long pathway from the Columbia River to the west flank of the Gorda Ridge. The age of the upper fining-upward unit of sandy turbidites appears to correspond to the latest Wisconsinan outburst of glacial Lake Missoula. Many of the outbursts, or jokulhlaups, from the glacial lakes probably continued flowing as hyperpycnally generated turbidity currents on entering the sea at the mouth of the Columbia River.

  1. Inventory of Rare of Endangered Vascular Plants Occurring in the Floodplain of the Mississippi River between Cairo, Illinois, and St. Paul, Minnesota, and in the Floodplain of the Illinois River between Grafton, Illinois, and Chicago,

    DTIC Science & Technology

    1975-01-01

    disturbed areas. It flowers from May to August. -:. :i5 1 53 Sesbania exaltata (Raf.) Cory Sesbania Family Leguminosae Status: Rare (Illinois). This is... Leguminosae Statuae Rare (T11inois). UttJt ts recent discovery in 1974 in a sandy prairie near Lock- pot, n .Will County, along the Illinois and Michigan

  2. DOE Office of Scientific and Technical Information (OSTI.GOV)

    Johnson, Gary E.; Storch, Adam; Skalski, J. R.

    The TFM study was designed to investigate the ecology and early life history of juvenile salmonids within shallow (<5 m) tidal freshwater habitats of the LCRE. We started collecting field data in June 2007. Since then, monthly sampling has occurred in the vicinity of the Sandy River delta (rkm 192–208) and at other sites and times in lower river reaches of tidal freshwater (rkm 110 to 141). This report provides a comprehensive synthesis of data covering the field period from June 2007 through April 2010.

  3. Sacramento River Water Treatment Plant Intake Pier & Access Bridge, ...

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

    Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  4. Tidal River Elbe - a sediment budget for the grain size fraction of medium sand

    NASA Astrophysics Data System (ADS)

    Winterscheid, Axel

    2016-04-01

    Human interventions have a historic and ongoing impact on estuarine sediment budgets across many estuaries worldwide. An early inference was the construction of embankments resulting in a constant loss of intertidal flats. Additionally, settlement activities and large scale land use changes in the upstream catchment areas had also an effect on sediment inflow rates. Today, the navigation channels in estuaries have been deepened for larger and more efficient vessels to reach a well-developed infrastructure of harbors and industrial areas often located far inland. In the past few years and just within the North-East Atlantic, the total annual amount of dredged sediments dumped at sea varied from 80 to 130 million tons (OSPAR Commission). In most estuaries across Europe the resulting human impact on the sediment fluxes and morphodynamics is significant. A good understanding of estuarine processes is essential for determining useful and meaningful measures to mitigate negative effects and to improve the current situation. Maintenance dredging and its environmental effects are therefore in the focus of public attention. Against this background, it is the aim of the presentation to identify and therefore to separate the particular effect that maintenance dredging has on sediment fluxes and budgets in the estuarine environment. Case study is the Tidal River Elbe in Germany, and here we set the focus on the grain size fraction of medium sand. In the past, river engineering measures forced the natural dynamics to form a concentrated stream flow along a fixed channel, except at a number of locations where side channels still exist. In addition to that, the main channel was deepened several times. The last deepening was in 1999/2000. The most significant deepening, however, took place from 1957 to 1962. Until then, an erosion-stable layer of marine clay (in German called "Klei") formed a flat bottom along most sections of the main channel. After removal of this layer of marine clay by capital dredging, Weichselion sandy deposits, which formed the geological layer underneath, now became part of the sediment transport regime. Nowadays, most sections of the main channel are morphologically characterized by a medium sandy river bed and subaquatic dunes of several meters height followed by sections of a poorly structured river bed caused by the sedimentation of silty sediments. By setting up the sediment balance for medium sand, the fluxes entering the estuary from the inland Elbe is one source term in the equation. The average annual load for the medium sand is estimated to be 110,000 m³/year (1996 - 2008, measurement station Neu Darchau). Further downstream in the tidal part of the river there are no further measurement stations located, but the analysis of a time series of multibeam sonar data (2000 to 2014) shows that large amounts of medium sand episodically pass the tidal weir at Geesthacht only in the event of extreme flood. This is due to a significant increase in bed volume between Geesthacht and the Port of Hamburg in the aftermath of a singular extreme event. Until the next extreme event the bed volume (functions as temporary storage for medium sand) is eroding again, which is the second source term. By comparing the information on bed load fluxes, the evolution of bed volumes over time and the dredging statistics we can conclude for the longer term that the total amount of medium sand that has been dredged and taken out of the system for constructional purposes is the same order of magnitude compared to the sum of both source terms. Hence, there is no or very limited net transport of medium sand passing the port area and entering the downstream river section. From the subsequent analysis of multibeam sonar data (2008 - 2014) we know for the river section from Hamburg to Brunsbuettel (total distance of 40 km) that there has been a continuous loss of about 1 Mio. m³/a in bed volumes, which means a deficit situation for medium sand. Currently, the Weichselion deposit is the active source for medium sand, but due to the lack of medium sand fluxes from upstream this at the cost of having an ongoing deepening of the main channel. The presumed cause for this deficit situation is the current management of the sandy dredged material. First of all, dredging and subsequent extraction of the dredged material is strongly affecting the longitudinal transport of medium sandy sediments from upstream through the Port of Hamburg in seaward direction. Further downstream in the river section in deficit, all dredged material, which is about 1 Mio m³/a solely for the fraction of medium sand, is transported by hopper dredgers over a long distance up to 40 km in seaward direction and disposed on a single site near Brunsbuettel. This 1 Mio m³/a is a similar volume in comparison to the loss in bed volume. From an analysis of the geometry of the subaquatic dunes we know for sandy sediments a seaward net transport that exists for large parts of this river section. All in one, there is an irretrievable and ongoing loss of medium sandy sediments. Vice versa for the river section next to Brunsbuettel, which is the location of the disposal site, the data show an increase of bed volumes and dredging amounts at the same time. For the Elbe case study we could demonstrate that maintenance dredging (and the subsequent disposal) could have a significant impact on the large scale sediment budget. Appropriate measures to stabilize the sediment budget in the inner part of the Tidal River Elbe for medium sand is (a) to dispose all medium sandy dredged material as close as possible to the location of dredging and (b) to reduce the extraction of medium sand in the Hamburg Port area.

  5. 11. View underside of draw span, with fender in foreground ...

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

    11. View underside of draw span, with fender in foreground and concrete deck spans and pile visible at rear, looking northeast - Colonel Alexander Scammell Memorial Bridge, Spanning Bellamy River at U.S. Route 4, Dover, Strafford County, NH

  6. 13. View of swing span showing bridge operator's control cabin, ...

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

    13. View of swing span showing bridge operator's control cabin, looking northeast - India Point Railroad Bridge, Spanning Seekonk River between Providence & East Providence, Providence, Providence County, RI

  7. 22. Detail view of approach span, showing bottom chord construction, ...

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

    22. Detail view of approach span, showing bottom chord construction, looking east - India Point Railroad Bridge, Spanning Seekonk River between Providence & East Providence, Providence, Providence County, RI

  8. Large-scale dam removal on the Elwha River, Washington, USA: coastal geomorphic change

    USGS Publications Warehouse

    Gelfenbaum, Guy R.; Stevens, Andrew W.; Miller, Ian M.; Warrick, Jonathan A.; Ogston, Andrea S.; Eidam, Emily

    2015-01-01

    Two dams on the Elwha River, Washington State, USA trapped over 20 million m3 of mud, sand, and gravel since 1927, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams, initiated in September 2011, induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the geomorphic response of a coastal delta to these increases. Detailed measurements of beach topography and nearshore bathymetry show that ~ 2.5 million m3 of sediment was deposited during the first two years of dam removal, which is ~ 100 times greater than deposition rates measured prior to dam removal. The majority of the deposit was located in the intertidal and shallow subtidal region immediately offshore of the river mouth and was composed of sand and gravel. Additional areas of deposition include a secondary sandy deposit to the east of the river mouth and a muddy deposit west of the mouth. A comparison with fluvial sediment fluxes suggests that ~ 70% of the sand and gravel and ~ 6% of the mud supplied by the river was found in the survey area (within about 2 km of the mouth). A hydrodynamic and sediment transport model, validated with in-situ measurements, shows that tidal currents interacting with the larger relict submarine delta help disperse fine sediment large distances east and west of the river mouth. The model also suggests that waves and currents erode the primary deposit located near the river mouth and transport sandy sediment eastward to form the secondary deposit. Though most of the substrate of the larger relict submarine delta was unchanged during the first two years of dam removal, portions of the seafloor close to the river mouth became finer, modifying habitats for biological communities. These results show that river restoration, like natural changes in river sediment supply, can result in rapid and substantial coastal geomorphological responses.

  9. Shear repair of P/C box beams using carbon fiber reinforced polymer (CFRP) fabric.

    DOT National Transportation Integrated Search

    2006-01-01

    The report documents the retrofit work carried out on the KY3297 Bridge over Little Sandy River in Carter County, Kentucky. Field investigation and evaluation revealed that the bridge superstructure was deficient in shear. The repair work was carried...

  10. Drainage areas of the Twelvepole Creek basin, West Virginia; Big Sandy River basin, West Virginia; Tug Fork basin, Virginia, Kentucky, West Virginia

    USGS Publications Warehouse

    Wilson, M.W.

    1979-01-01

    Drainage areas were determined for 61 basins in the Twelvepole Creek basin, West Virginia; 11 basins of the Big Sandy River Basin, West Virginia; and 210 basins in the Tug Fork basin of Virginia, Kentucky, and West Virginia. Most basins with areas greater than 5 square miles were included. Drainage areas were measured with electronic digitizing equipment, and supplementary measurements were made with a hand planimeter. Stream mileages were determined by measuring, with a graduated plastic strip, distances from the mouth of each stream to the measuring point on that stream. Mileages were reported to the nearest one-hundredth of a mile in all cases. The latitude and longitude of each measuring point was determined with electronic digitizing equipment and is reported to the nearest second. The information is listed in tabular form in downstream order. Measuring points for the basins are located in the tables by intersecting tributaries, by counties, by map quadrangles, or by latitude and longitude. (Woodard-USGS)

  11. MODEL FROM COLLECTION OF DR. TIMOTHY L. FLINN, OF HOWE ...

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

    MODEL FROM COLLECTION OF DR. TIMOTHY L. FLINN, OF HOWE PIPE TRUSS BRIDGE (NO LONGER EXTANT) SPANNING DEEP CREEK, SHACKELFORD COUNTY, TEXAS, CONSTRUCTED BY FLINN-MOYER COMPANY IN 1896. 3/4 VIEW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  12. MODEL FROM COLLECTION OF DR. TIMOTHY L. FLINN, OF HOWE ...

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

    MODEL FROM COLLECTION OF DR. TIMOTHY L. FLINN, OF HOWE PIPE TRUSS BRIDGE (NO LONGER EXTANT) SPANNING DEEP CREEK, SHACKELFORD COUNTY, TEXAS, CONSTRUCTED BY FLINN-MOYER COMPANY IN 1896. BARREL VIEW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  13. MODEL FROM COLLECTION OF DR. TIMOTHY L. FLINN, OF HOWE ...

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

    MODEL FROM COLLECTION OF DR. TIMOTHY L. FLINN, OF HOWE PIPE TRUSS BRIDGE (NO LONGER EXTANT) SPANNING DEEP CREEK, SHACKELFORD COUNTY, TEXAS, CONSTRUCTED BY FLINN-MOYER COMPANY IN 1896. ELEVATION VIEW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  14. 11. Photographic copy of lines drawing of original construction (24 ...

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

    11. Photographic copy of lines drawing of original construction (24 January 1911, in possession of St. Louis County Bridge Engineer, Virginia, Minnesota). Profile of main and approach spans; plan and sectional view of concrete river pier - Brosseau Road Bridge, County Road 694 spanning Cloquet at River, Burnett, St. Louis County, MN

  15. 24. VIEW TO NORTHEAST FROM BRIDGE HOUSE. SOUTH SWING SPAN ...

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

    24. VIEW TO NORTHEAST FROM BRIDGE HOUSE. SOUTH SWING SPAN (SEEN AS THE ROADWAY IN FOREGROUND) HAS CLOSED, NORTH SWING SPAN IS APPROACHING CLOSURE. - George P. Coleman Memorial Bridge, Spanning York River at U.S. Route 17, Yorktown, York County, VA

  16. 16. Detail view of swing span track manual alignment and ...

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

    16. Detail view of swing span track manual alignment and locking mechanisms, looking southwest - India Point Railroad Bridge, Spanning Seekonk River between Providence & East Providence, Providence, Providence County, RI

  17. Habitat use and population characteristics of potentially spawning shovelnose sturgeon Scaphirhynchus platorynchus (Rafinesque, 1820), blue sucker ( Cycleptus elongatus (Lesueur, 1817), and associated species in the lower Wisconsin River, USA

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Lyons, John D.; Walchak, D.; Haglund, J.

    The goal of this study was to compare the possible locations, timing, and characteristics of potentially spawning shovelnose sturgeon ( Scaphirhynchus platorynchus), blue sucker ( Cycleptus elongatus), and associated species during the spring of 2007-2015 in the 149-km-long lower Wisconsin River, Wisconsin, USA, a large, shallow, sand-dominated Mississippi River tributary. A 5-km index station of two pairs of rocky shoals surrounded by sandy areas was electrofished for shovelnose sturgeon and blue sucker in a standardized fashion a total of 40 times from late March through mid- June, the presumed spawning period. On one date in 2008 and two dates inmore » 2012, all rocky shoals and adjacent sandy areas in the lowermost 149 km of the river were also electrofished for both species. Shovelnose sturgeon and blue sucker appeared to spawn in the limited rocky areas of the river along with at least four other species: mooneye ( Hiodon tergisus), quillback ( Carpiodes cyprinus), smallmouth buffalo ( Ictiobus bubalus), and shorthead redhorse ( Moxostoma macrolepidotum), usually at depths of 0.8-2.0 m and surface velocities of 0.4–1.0 m/s. However, apparently spawning shovelnose sturgeon were found only on mid-channel cobble and coarse gravel shoals within a single 7-km segment that included the 5-km index station, whereas apparently spawning blue suckers were encountered on these same shoals but also more widely throughout the river on eroding bluff shorelines of bedrock and boulder and on artificial boulder wing dams and shoreline rip-rap. Both species showed evidence of homing to the same mid-channel shoal complexes across years.« less

  18. Habitat use and population characteristics of potentially spawning shovelnose sturgeon Scaphirhynchus platorynchus (Rafinesque, 1820), blue sucker ( Cycleptus elongatus (Lesueur, 1817), and associated species in the lower Wisconsin River, USA

    DOE PAGES

    Lyons, John D.; Walchak, D.; Haglund, J.; ...

    2016-11-07

    The goal of this study was to compare the possible locations, timing, and characteristics of potentially spawning shovelnose sturgeon ( Scaphirhynchus platorynchus), blue sucker ( Cycleptus elongatus), and associated species during the spring of 2007-2015 in the 149-km-long lower Wisconsin River, Wisconsin, USA, a large, shallow, sand-dominated Mississippi River tributary. A 5-km index station of two pairs of rocky shoals surrounded by sandy areas was electrofished for shovelnose sturgeon and blue sucker in a standardized fashion a total of 40 times from late March through mid- June, the presumed spawning period. On one date in 2008 and two dates inmore » 2012, all rocky shoals and adjacent sandy areas in the lowermost 149 km of the river were also electrofished for both species. Shovelnose sturgeon and blue sucker appeared to spawn in the limited rocky areas of the river along with at least four other species: mooneye ( Hiodon tergisus), quillback ( Carpiodes cyprinus), smallmouth buffalo ( Ictiobus bubalus), and shorthead redhorse ( Moxostoma macrolepidotum), usually at depths of 0.8-2.0 m and surface velocities of 0.4–1.0 m/s. However, apparently spawning shovelnose sturgeon were found only on mid-channel cobble and coarse gravel shoals within a single 7-km segment that included the 5-km index station, whereas apparently spawning blue suckers were encountered on these same shoals but also more widely throughout the river on eroding bluff shorelines of bedrock and boulder and on artificial boulder wing dams and shoreline rip-rap. Both species showed evidence of homing to the same mid-channel shoal complexes across years.« less

  19. 6. Main span (parker through truss, detail of floor system ...

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

    6. Main span (parker through truss, detail of floor system and bottom lateral bracing; looking northwest. - Bridge 4666, Minnesota Trunk Highway 19 spanning Minnesota River, North Redwood, Redwood County, MN

  20. 4. Main span (parker through truss), south end, detail of ...

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

    4. Main span (parker through truss), south end, detail of web members and sway bracing; looking west. - Bridge 4666, Minnesota Trunk Highway 19 spanning Minnesota River, North Redwood, Redwood County, MN

  1. 9. Detail of truss work on southwesternmost span, looking northnortheast ...

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

    9. Detail of truss work on southwesternmost span, looking north-northeast - Bridge No. 4800, Spanning Minnesota River on Trunk Highway 4 between Brown & Nicollet Counties, Sleepy Eye, Brown County, MN

  2. 5. View showing Crooked River High Bridge in background and ...

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

    5. View showing Crooked River High Bridge in background and Ralph Modjeski railroad bridge in foreground - Crooked River High Bridge, Spanning Crooked River Gorge at Dalles-California Highway, Terrebonne, Deschutes County, OR

  3. 3. LOS ANGELES RIVER AND FIGUEROA STREET VIADUCTS ACROSS LOS ...

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

    3. LOS ANGELES RIVER AND FIGUEROA STREET VIADUCTS ACROSS LOS ANGELES RIVER. LOOKING 18° N. - Arroyo Seco Parkway, Figueroa Street Viaduct, Spanning Los Angeles River, Los Angeles, Los Angeles County, CA

  4. GENERAL VIEW OF NORTH SAN GABRIEL RIVER BRIDGE, NORTH APPROACH, ...

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

    GENERAL VIEW OF NORTH SAN GABRIEL RIVER BRIDGE, NORTH APPROACH, LOOKING SOUTH. - North San Gabriel River Bridge, Spanning North Fork of San Gabriel River at Business Route 35, Georgetown, Williamson County, TX

  5. GENERAL VIEW OF NORTH SAN GABRIEL RIVER BRIDGE, NORTH ABUTMENT, ...

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

    GENERAL VIEW OF NORTH SAN GABRIEL RIVER BRIDGE, NORTH ABUTMENT, LOOKING NORTHWEST. - North San Gabriel River Bridge, Spanning North Fork of San Gabriel River at Business Route 35, Georgetown, Williamson County, TX

  6. DETAIL OF NORTH SAN GABRIEL RIVER BRIDGE, PICKET HAND RAIL, ...

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

    DETAIL OF NORTH SAN GABRIEL RIVER BRIDGE, PICKET HAND RAIL, LOOKING WEST. - North San Gabriel River Bridge, Spanning North Fork of San Gabriel River at Business Route 35, Georgetown, Williamson County, TX

  7. GENERAL VIEW OF NORTH SAN GABRIEL RIVER BRIDGE, EAST SIDE, ...

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

    GENERAL VIEW OF NORTH SAN GABRIEL RIVER BRIDGE, EAST SIDE, LOOKING SOUTHWEST. - North San Gabriel River Bridge, Spanning North Fork of San Gabriel River at Business Route 35, Georgetown, Williamson County, TX

  8. Suppression of cheatgrass by established perennial grasses: I. mechanisms

    USDA-ARS?s Scientific Manuscript database

    Cheatgrass is often considered a competitive species. In a greenhouse experiment using rhizotrons, we tested the effect of established perennial grasses (Indian ricegrass, creeping wildrye, and Snake River wheatgrass) on the growth of cheatgrass. The soil was a sandy loam A horizon of a Xeric Haploc...

  9. Installation Restoration Program Records Search for McEntire Air National Guard Base Eastover, South Carolina

    DTIC Science & Technology

    1984-01-01

    from the north, thereby occasionally encouraging unseasonably warm temperatures. Unseasonably cold temperatures most often occur when the Bermuda...marl. Hawthorn 160 - Sandy phophatic marl and soft limestone with interbedded brittle -shale. 25 OLIGOCENE (Ta) Flint River 50 - Reddish-yellow sand

  10. Behavior of fiber reinforced sandy slopes under seepage

    USDA-ARS?s Scientific Manuscript database

    Seepage flow is a major contributor to instability of natural hill slopes, river banks and engineered embankments. In order to increase the factor of safety, an emerging technology involves the inclusion of synthetic fibers in the soil. The addition of tension resisting fibers has a favorable effec...

  11. 33 CFR 165.801 - Annual fireworks displays and other events in the Eighth Coast Guard District requiring safety...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... July Big Bang Fireworks USS LEXINGTON/Corpus Christi, TX All waters contained within a 1,000-ft radius... down river from the Ashland bridge. 24 27 July 4th Big Sandy Superstore Arena/Dawg Dazzle Fireworks...

  12. 33 CFR 165.801 - Annual fireworks displays and other events in the Eighth Coast Guard District requiring safety...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... July Big Bang Fireworks USS LEXINGTON/Corpus Christi, TX All waters contained within a 1,000-ft radius... down river from the Ashland bridge. 24 27 July 4th Big Sandy Superstore Arena/Dawg Dazzle Fireworks...

  13. Latex modified fibrous concrete Sundial-Sandy River Section : interim report.

    DOT National Transportation Integrated Search

    1985-03-01

    In November 1980, a contractor requested permission to use a 1.5 inch thick Latex Modified Fibrous Concrete (LMFC) overlay in lieu of a 2.5 inch low slump concrete (Iowa System) or a 2.5 inch unreinforced latex modified concrete. The overlays were to...

  14. A Cultural Resources Literature Search and Record Review of The St. Francis River Seepage Project within Clay, Craighead, Mississippi and Poinsett Counties, Arkansas and Dunklin County, Missouri

    DTIC Science & Technology

    1985-10-30

    Brook Shelters). During this long period a large number of different projectile point types were produced (ie, Rice Lobed, Big Sandy, White River Archaic...Hidden Valley Stemmed, Hardin Barbed, Sear- cy, Rice Lanceolate, Jakie Stemmed, and Johnson). No controlled excavations have been done at any Early...University of Arkansas, Fayetteville. Edrington, Mabel 1962 History of Mississippi County. Arkansas. Ocala Star Banner, Ocala, Florida. 5 68

  15. Turning the tide: effects of river inflow and tidal amplitude on sandy estuaries in laboratory landscape experiments

    NASA Astrophysics Data System (ADS)

    Kleinhans, Maarten; Braat, Lisanne; Leuven, Jasper; Baar, Anne; van der Vegt, Maarten; van Maarseveen, Marcel; Markies, Henk; Roosendaal, Chris; van Eijk, Arjan

    2016-04-01

    Many estuaries formed over the Holocene through a combination of fluvial and coastal influxes, but how estuary planform shape and size depend on tides, wave climate and river influxes remains unclear. Here we use a novel tidal flume setup of 20 m length by 3 m width, the Metronome (http://www.uu.nl/metronome), to create estuaries and explore a parameter space for the simple initial condition of a straight river in sandy substrate. Tidal currents capable of transporting sediment in both the ebb and flood phase because they are caused by periodic tilting of the flume rather than the classic method of water level fluctuation. Particle imaging velocimetry and a 1D shallow flow model demonstrate that this principle leads to similar sediment mobility as in nature. Ten landscape experiments recorded by timelapse overhead imaging and AGIsoft DEMs of the final bed elevation show that absence of river inflow leads to short tidal basins whereas even a minor discharge leads to long convergent estuaries. Estuary width and length as well as morphological time scale over thousands of tidal cycles strongly depend on tidal current amplitude. Paddle-generated waves subdue the ebb delta causing stronger tidal currents in the basin. Bar length-width ratios in estuaries are slightly larger to those in braided rivers in experiments and nature. Mutually evasive ebb- and flood-dominated channels are ubiquitous and appear to be formed by an instability mechanism with growing bar and bifurcation asymmetry. Future experiments will include mud flats and live vegetation.

  16. MODEL FROM COLLECTION OF DR. TIMOTHY L. FLINN, OF HOWE ...

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

    MODEL FROM COLLECTION OF DR. TIMOTHY L. FLINN, OF HOWE PIPE TRUSS BRIDGE (NO LONGER EXTANT) SPANNING DEEP CREEK, SHACKELFORD COUNTY, TEXAS, CONSTRUCTED BY FLINN-MOYER COMPANY IN 1896. 3/4 VIEW FROM ABOVE. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  17. 9. View underside of bridge, showing draw span machinery, floor ...

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

    9. View underside of bridge, showing draw span machinery, floor beams and piers, looking southwest - Colonel Alexander Scammell Memorial Bridge, Spanning Bellamy River at U.S. Route 4, Dover, Strafford County, NH

  18. DETAIL OF SOUTH SAN GABRIEL RIVER BRIDGE, BUILDER’S PLATE, LOOKING ...

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

    DETAIL OF SOUTH SAN GABRIEL RIVER BRIDGE, BUILDER’S PLATE, LOOKING NORTHEAST. - South San Gabriel River Bridge, Spanning South Fork of San Gabriel River at Georgetown at Business Route 35, Georgetown, Williamson County, TX

  19. GENERAL VIEW OF SOUTH SAN GABRIEL RIVER BRIDGE, WEST SIDE, ...

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

    GENERAL VIEW OF SOUTH SAN GABRIEL RIVER BRIDGE, WEST SIDE, LOOKING EAST. - South San Gabriel River Bridge, Spanning South Fork of San Gabriel River at Georgetown at Business Route 35, Georgetown, Williamson County, TX

  20. GENERAL VIEW OF SOUTH SAN GABRIEL RIVER BRIDGE, SOUTH ABUTMENT, ...

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

    GENERAL VIEW OF SOUTH SAN GABRIEL RIVER BRIDGE, SOUTH ABUTMENT, LOOKING SOUTHWEST. - South San Gabriel River Bridge, Spanning South Fork of San Gabriel River at Georgetown at Business Route 35, Georgetown, Williamson County, TX

  1. GENERAL VIEW OF SOUTH SAN GABRIEL RIVER BRIDGE, SOUTH APPROACH, ...

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

    GENERAL VIEW OF SOUTH SAN GABRIEL RIVER BRIDGE, SOUTH APPROACH, LOOKING NORTH. - South San Gabriel River Bridge, Spanning South Fork of San Gabriel River at Georgetown at Business Route 35, Georgetown, Williamson County, TX

  2. DETAIL OF SOUTH SAN GABRIEL RIVER BRIDGE, PICKET HAND RAIL, ...

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

    DETAIL OF SOUTH SAN GABRIEL RIVER BRIDGE, PICKET HAND RAIL, LOOKING WEST. - South San Gabriel River Bridge, Spanning South Fork of San Gabriel River at Georgetown at Business Route 35, Georgetown, Williamson County, TX

  3. VIEW OF NORTH SAN GABRIEL RIVER BRIDGE, FLOOR SYSTEM AND ...

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

    VIEW OF NORTH SAN GABRIEL RIVER BRIDGE, FLOOR SYSTEM AND LATERAL BRACING, LOOKING SOUTH. - North San Gabriel River Bridge, Spanning North Fork of San Gabriel River at Business Route 35, Georgetown, Williamson County, TX

  4. Sediment and water discharge rates of Turkish Black Sea rivers before and after hydropower dam construction

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Hay, B.J.

    1994-06-01

    Presently, the water discharge rate to the Black Sea by Turkish rivers is approximately 41 km[sup 3]/yr. The sediment discharge rate of Turkish rivers to the Black Sea is 28 x 10[sup 6] t/yr. Before construction of the hydroelectric dams, the sediment discharge rate was approximately 70 x 10[sup 6] t/yr. The sharp reduction in sediment load is largely a result of the dams near the mouths of the Yesil Irmak and Kizil Irmak rivers. Before the construction of dams, Turkish rivers contributed approximately one third of the total amount of sediment received by the Black Sea from all surroundingmore » rivers. The life-span of the major reservoirs varies from approximately only one century (Yesil Irmak river reservoirs) to several thousand years (Sakarya river reservoirs). Life-span for the large Altinkaya Dam reservoir is estimated with approximately 500 yr.« less

  5. Survival and growth of 31 Populus clones in South Carolina

    Treesearch

    David R. Coyle; Mark D. Coleman; Jaclin A. Durant; Lee A. Newman

    2006-01-01

    Populus species and hybrids have many practical applications, but clonal performance is relatively undocumented in the southeastern United States outside of the Mississippi River alluvial floodplain. In spring 2001, 31 Populus clones were planted on two sites in South Carolina, USA. The sandy, upland site received irrigation and...

  6. 8. Approach spans (two warren pony trusses), west side, detail ...

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

    8. Approach spans (two warren pony trusses), west side, detail of lower chords and pier no. 2 (west pier); looking south. - Bridge 4666, Minnesota Trunk Highway 19 spanning Minnesota River, North Redwood, Redwood County, MN

  7. 29. SOUTH SWING SPAN, SHOWING REPRESENTATIVE REDUCTION GEAR/MOTOR DRIVE UNIT ...

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

    29. SOUTH SWING SPAN, SHOWING REPRESENTATIVE REDUCTION GEAR/MOTOR DRIVE UNIT (CENTER) AND WEDGE MOTOR UNIT (RIGHT). - George P. Coleman Memorial Bridge, Spanning York River at U.S. Route 17, Yorktown, York County, VA

  8. Water resources of the Two Rivers Watershed, Northwestern Minnesota

    USGS Publications Warehouse

    Maclay, R.W.; Winter, Thomas C.; Pike, G.M.

    1967-01-01

    It lies in parts of Kittson and Roseau counties and includes the drainage basins of the Two Rivers and Joe River. The flat lake plain which extends 15 to 20 miles east of the Red River of the North is extensively cultivated for small grains and sugar beets. The gently undulating till plain is cultivated largely for small grains and hay. The areas not under cultivation support a forest of poplar with some maple and oak. Oak is the predominate tree on the sandy ridges. The large peat areas are covered with brush and marsh grasslands. Outdoor recreational facilities in the watershed consist principally of the Lake Bronson Park, water-fowl hunting in the extensive marshlands, and deer and small game hunting in the forested areas.

  9. 3. AERIAL VIEW OF SAW MILL RIVER CULVERT. NEPPERHAN AVENUE ...

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

    3. AERIAL VIEW OF SAW MILL RIVER CULVERT. NEPPERHAN AVENUE IS AT LEFT, SLIGHTLY FILLED SAW MILL RIVER CULVERT IS ON RIGHT. - Old Croton Aqueduct, Saw Mill River Culvert, Spanning Nepperhan Avenue, Yonkers, Westchester County, NY

  10. VIEW OF SOUTH SAN GABRIEL RIVER BRIDGE, FLOOR SYSTEM AND ...

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

    VIEW OF SOUTH SAN GABRIEL RIVER BRIDGE, FLOOR SYSTEM AND LATERAL BRACING, LOOKING NORTH. - South San Gabriel River Bridge, Spanning South Fork of San Gabriel River at Georgetown at Business Route 35, Georgetown, Williamson County, TX

  11. 11. View of bridge operator's control cabin from Seekonk River ...

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

    11. View of bridge operator's control cabin from Seekonk River looking northwest - India Point Railroad Bridge, Spanning Seekonk River between Providence & East Providence, Providence, Providence County, RI

  12. DOE Office of Scientific and Technical Information (OSTI.GOV)

    Dobson, Robin

    During the period 2008-2009, there were 2 contracts with BPA. One (38539) was dealing with the restoration work for 2007 and the other (26198) was an extension on the 2006 contract including the NEPA for Dam removal on the old channel of the Sandy River. For contract 38539, the Sandy River Delta Habitat Restoration project continued its focus on riparian hardwood reforestation with less emphasis on wetlands restoration. Emphasis was placed on Sundial Island again due to the potential removal of the dike and the loss of access in the near future. AshCreek Forest Management was able to leverage additionalmore » funding from grants to help finance the restoration effort; this required a mid year revision of work funded by BPA. The revised work not only continued the maintenance of restored hardwood forests, but was aimed to commence the restoration of the Columbia River Banks, an area all along the Columbia River. This would be the final restoration for Sundial Island. The grant funding would help achieve this. Thus by 2011, all major work will have been completed on Sundial Island and the need for access with vehicles would no longer be required. The restored forests continued to show excellent growth and development towards true riparian gallery forests. Final inter-planting was commenced, and will continue through 2010 before the area is considered fully restored. No new wetland work was completed. The wetlands were filled by pumping in early summer to augment the water levels but due to better rainfall, no new fuel was required to augment existing. Monitoring results continued to show very good growth of the trees and the restoration at large was performing beyond expectations. Weed problems continue to be the most difficult issue. The $100,000 from BPA planned for forest restoration in 2008, was augmented by $25,000 from USFS, $120,000 from OR150 grant, $18,000 from LCREP, and the COE continued to add $250,000 for their portion. Summary of the use of these funds are displayed in Table 1 (page 5). Work on the restoration of the original Sandy River channel (dam removal, contract 26198) continued slowly. The draft EA was completed and sent out for review. The COE has decided to finish the NEPA with the intent to complete the project.« less

  13. 31. DETAIL VIEW OF MOVABLE SPAN, UPPER TRUSS GUSSET PLATE, ...

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

    31. DETAIL VIEW OF MOVABLE SPAN, UPPER TRUSS GUSSET PLATE, CONNECTION OF VERTICAL AND HORIZONTAL MEMBERS AT BRIDGE TENDER'S MOUSE (taken in December 1983) - Sharptown Bridge, Spanning Nanticoke River, State Route 313, Sharptown, Wicomico County, MD

  14. 4. VIEW TAKEN IN THE MIDDLE OF THE BRIDGE, SHOWING ...

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

    4. VIEW TAKEN IN THE MIDDLE OF THE BRIDGE, SHOWING UNDERSIDE OF PORTAL OF ONE SPAN AND LOOKING AT OTHER SPAN - "Forder" Pratt Through Truss Bridge, Spanning Maumee River at County Route 73, Antwerp, Paulding County, OH

  15. Hot Moments in Cold Spots - Investigating Reactive Transport Patterns at Aquifer-River Interfaces by Heat Tracers and Distributed Sensor Networks

    NASA Astrophysics Data System (ADS)

    Krause, Stefan; Angermann, Lisa; Naden, Emma; Cassidy, Nigel; Blume, Theresa

    2010-05-01

    The mixing of groundwater and surface water in hyporheic zones often coincides with high redox reactivity and chemical transformation potential. Depending on redox conditions and reaction types, hyporheic mixing of groundwater and surface water can lead to either attenuation or enrichment of pollutants or nutrients with diametrical implications for stream and aquifer hydro-ecological conditions. This study investigates the reactive transport of nitrate and a chlorinated solvent (Trichloroethylene - TCE) at the aquifer-river interface of a UK lowland river. In this study, distributed temperature sensor networks and hydro-geophysical methods, which have been applied for identifying structural streambed heterogeneity and tracing aquifer river exchange, were combined with hydro-chemical analyses of hyporheic multi-component reactive transport. In stream Electric Resistivity Tomography has been applied to map the complex spatial distribution of highly conductive sandy and gravely sediments in contrast to semi-confining, low conductivity peat lenses. Reach scale (1km) spatial patterns and temporal dynamics of aquifer-river exchange have been identified by heat tracer experiments based on fibre-optic Distributed Temperature Sensing in combination with 2D thermocouple-arrays and small scale heat pulse injection methods for tracing shallow (25 cm) hyporheic flow paths. Spatial patterns of hyporheic redox conditions, dissolved oxygen and organic carbon (DOC) content as well as concentrations of major anions, TCE and its decay products have been observed in 48 nested multi-level piezometers and passive DET (Diffusive Equilibrium in Thin film) gel probes. Our results indicate that patterns of cold spots in streambed sediments can be attributed to fast groundwater up-welling in sandy and gravely sediments resulting in low hyporheic residence times. Contrasting conditions were found at warmer areas at the streambed surface where groundwater - surface water exchange was inhibited by the existence of peat or clay lenses within the streambed. These flow-inhibiting structures have been shown to cause semi-confined conditions in the up-welling groundwater, resulting in long residence times and increased redox-reactivity. Anoxic conditions and high DOC contents combined with long residence times underneath peat layers cause highly efficient denitrification rates, reducing nitrate concentrations from > 50mg/l to below the level of detection. In contrast, sandy and gravely areas of fast groundwater up-welling where characterized by only marginal changes in nitrate concentrations. Observation of the reactive transport of the chlorinated solvent groundwater plume into the river suggest that natural attenuation of TCE, which competes with nitrate for DOC as reductive agent, is limited to the semi-confined, anoxic, low nitrate - high DOC groundwater pockets underneath streambed peat lenses. The investigations supported the development of a conceptual model of aquifer - river exchange and hyporheic reactivity in lowland rivers including temperature traceable "hyporheic super-reactors" of great importance for river restoration, water quality and ecology status.

  16. Hot Moments in Cold Spots - Using Heat Tracers and Distributed Sensor Networks to Investigate Reactive Transport Patterns at Aquifer-River Interfaces

    NASA Astrophysics Data System (ADS)

    Krause, S.; Angermann, L.; Naden, E.; Cassidy, N. J.

    2009-12-01

    The mixing of groundwater and surface water in hyporheic zones often coincides high redox reactivity and chemical transformation potential. Depending on redox conditions and reaction types, hyporheic mixing of groundwater and surface water can lead to either attenuation or enrichment of pollutants or nutrients with diametrical implications for stream and aquifer hydro-ecology. This study investigates the reactive transport of nitrate and the chlorinated solvent Trichloroethylene (TCE) at the aquifer-river interface of a UK lowland river. The investigations are based on novel distributed sensor networks and hydro-geophysical methods for the identification of structural streambed heterogeneity and the tracing of aquifer river exchange combined with hydro-chemical analyses of hyporheic multi-component reactive transport. In stream Electric Resistivity Tomography and Ground Penetrating Radar have been applied to map the complex spatial distribution of highly conductive sandy and gravely sediments in contrast to semi-confining, low conductivity peat lenses. Reach scale (1km) spatial patterns and temporal dynamics of aquifer-river exchange have been identified by heat tracer experiments based on fibre-optic Distributed Temperature Sensing in combination with 2D thermocouple-arrays and small scale heat pulse injection methods for tracing shallow (25 cm) hyporheic flow paths. Spatial patterns of hyporheic redox conditions, dissolved oxygen and organic carbon (DOC) content as well as concentrations of major anions, TCE and its decay products have been observed in 48 nested multi-level piezometers and passive DET (Diffusive Equilibrium in Thin film) gel probes. Our results indicate that patterns of cold spots in streambed sediments can be attributed to fast groundwater up-welling in sandy and gravely sediments resulting in low hyporheic residence times. Contrasting conditions were found at warmer areas at the streambed surface where groundwater - surface water exchange was inhibited by the existence of peat or clay lenses within the streambed. These flow-inhibiting structures have been shown to cause semi-confined conditions in the up-welling groundwater, resulting in long residence times and increased redox-reactivity. Anoxic conditions and high DOC contents combined with long residence times underneath peat layers cause highly efficient denitrification rates, reducing nitrate concentrations from > 50mg/l to below the level of detection. In contrast, sandy and gravely areas of fast groundwater up-welling where characterized by only marginal changes in nitrate concentrations. Observation of the reactive transport of the chlorinated solvent groundwater plume into the river suggest that natural attenuation of TCE, which competes with nitrate for DOC as reductive agent, is limited to the semi-confined, anoxic, low nitrate - high DOC groundwater pockets underneath streambed peat lenses. The investigations supported the development of a conceptual model of aquifer - river exchange and hyporheic reactivity in lowland rivers including temperature traceable “hyporheic super-reactors” of great importance for river restoration, water quality and ecology status.

  17. 15. View of Tombigbee River Bridge facing same direction as ...

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

    15. View of Tombigbee River Bridge facing same direction as in photograph no. MS-13-14 except this view is the underside of the bridge. - Tombigbee River Bridge, Spanning Tombigbee River at State Highway 182, Columbus, Lowndes County, MS

  18. BRONXWHITESTONE OVER THE EAST RIVER, NOTE CONSIDERABLE AIR POLLUTION OVER ...

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

    BRONX-WHITESTONE OVER THE EAST RIVER, NOTE CONSIDERABLE AIR POLLUTION OVER CITY IN BACKGROUND - Bronx-Whitestone Bridge, Spanning East River between Whitestone, Queens & the Bronx, Bronx, Bronx County, NY

  19. Earth Observations taken by the Expedition 35 Crew

    NASA Image and Video Library

    2013-03-25

    ISS035-E-009454 (25 March 2013 ) --- One of the Expedition 35 crew members aboard the Earth-orbiting International Space Station used a 400 millimeter lens to photograph this view of the Great Sandy Desert, northwestern Australia on March 25. It bears evidence that much of Australia is arid. In northwest Australia the Great Sandy Desert holds great geological interest as a zone of active sand dune movement; strings of narrow lakes that represent very ancient rivers are also present. While a variety of dune forms can be seen in the region, this photograph features numerous linear dunes (approximately 25 meters high) separated in a roughly regular fashion (0.5?1.5 kilometers), and aligned closely to the winds that generated them?that is, winds blowing from east to west. Where linear dunes converge, dune confluences point downwind. One of the main visual impressions flying over such tropical dune fields ? both from an airplane or from the orbital station outpost?apart from the dune patterns are fire scars where thin vegetation has been burned off the dunes. The result is dunes that appear red from the underlying sand (image top left and top right), and darker areas where the vegetation remains (image lower left and lower right). The white feature visible down the center of the image is Lake Auld, the white color being the result of a cemented combination of fine clayey sediment and salts from evaporation of flood waters that occasionally fill the lake. Wider views of the area show that this lake is part of what is now known to have been a major, ancient river system in northwest Australia, draining northwest to the Indian Ocean. Such sinuous lakes are also known in Australia as ?river lakes.? Scientists point out that the river system is remarkably well preserved considering that the rivers were probably active in the Paleocene Epoch more than 55 million years ago. Australia then lay much further south in a wetter climatic zone. Today?s desert climate results in almost all rivers in the Great Sandy Desert being dry. Linear dunes can be seen entering Lake Auld on the east side. During flooding events, the sand of the dune noses is dispersed, becoming incorporated into the lake floor sediments together with muds and salts. During the long intervening dry periods, sand can blow across the lake floor to build thinner, smaller dunes visible as linear accumulations on the west side of the lake.

  20. Definite Project Report for Section 205 Flood Control, Illinois River, Liverpool, Illinois, with Final Environmental Impact Statement

    DTIC Science & Technology

    1989-10-01

    consisting of fat clay, sandy lean clay, and clayey sand. 7 Climate The climate of Fulton County is humid continental and is characterized by cold...Tp a. FAT Can U0I S go in on &- WI - WU. GAJm. In.~a Ts IPA a 0.2 ft 17. AW’U.Z I 9 £1 t som alsieIpm n lawe W. . MY4 CIA am a s V 0 WMO a~~~a ". MVU...feet of Cahokia alluvium. The alluvium is made up of 5 feet of fat clay overlying 4 feet of sandy lean clay. Indicated in situ shear strengths range

  1. Controlling factors of recent clastic coastal sediments (Viransehir, Mersin bay, S Turkey)

    NASA Astrophysics Data System (ADS)

    Gül, Murat; Özbek, Ahmet; Kurt, Mehmet Ali; Zorlu, Kemal

    2009-04-01

    The Plio-Quaternary conglomeratic sets within the marine environment of the Viranşehir coast (W Mersin, S Turkey) are responsible for the evolution of sandy and gravely beaches due to their control on various factors such as sea floor irregularity, wave energy, and organic activity. The conglomeratic sets close to the shoreline (50-150 cm) act as wave breakers, creating hard substratum and high energy, well-oxygenated environment for organisms like Patella sp., Phoronida worms and Brachidontes pharaonis (Fischer P. 1870). The boring activities of these organisms have disintegrated the sandy matrix of these sets. Finer-grained matrix sediments have been transported to the interset and open sea, while cobble-pebbles have been carried landwards and have created imbricated gravely beach deposits without matrix. Sandy beach is evolving where the conglomeratic sets away from the shoreline (5.0-10.0 m). In this example, sets form a bar; causing fivefold division as backshore, berm, surf zone, bar and offshore from land to sea. Poorly sorted, cobbles-pebbles cobbles and pebbles are found associated with the high-energy environments of bars, whilst well-sorted sands are observed in low energetic environments on shore. The sets and recent shell fragments are the main sources of coastal sediments in Viranşehir. However, the amount of shell fragments decrease towards the active river mouth. This is due to sediment and fresh water influx from the river causing deteriorated temperature, salinity and light penetration of the marine environment resulting in less organic diversity.

  2. Carbonate pseudomatrix in siliciclastic-carbonate turbidites from the Oquirrh-Wood River basin, southern Idaho

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Geslin, J.K.

    1994-01-01

    Upper Pennsylvanian to Lower Permian mixed siliciclastic-carbonate sandy turbidites from the Oquirrh-Wood River basin in southern Idaho contain 20 to 60 modal percent microspar and pseudospar. Previous interpretations suggested that neomorphism of detrital lime mud produced the observed carbonate textures. The original detrital lime mud produced the observed carbonate textures. The original detrital lime mud content, based on these interpretations, indicates matrix-rich, poorly sorted turbidite deposits. However, observed turbidite hydrodynamics, and grain-size data from experimental and naturally occurring sandy turbidite deposits, indicate that T[sub n]-T[sub c] intervals of sandy turbidites are generally moderately well sorted, with low matrix content. Fluorescencemore » microscopy reveals that the carbonate fraction of these mixed siliciclastic-carbonate turbidites contains micritized skeletal grains and fusulinids, and algal peloids. These micritized grains and peloids were physically compacted and neomorphosed to form a carbonate pseudomatrix. Formation of carbonate pseudomatrix is analogous to formation of pseudomatrix in siliciclastic lithic sands, which includes crushing and recrystallization of lithic grains. Grain-size analysis of siliciclastic and slightly compacted carbonate grains indicates that these are moderately well sorted turbidite deposits with similar grain-size populations in both fractions. Lack of recognition of carbonate pseudomatrix could lead to erroneous interpretations of carbonate petrology. Identification of carbonate pseudomatrix is important to the study of mixed siliciclastic-carbonate gravity-flow deposits. This study demonstrates the value of fluorescence microscopy in the recognition of carbonate pseudomatrix.« less

  3. Effect of salinity and inorganic nitrogen concentrations on nitrification and denitrification rates in intertidal sediments and rocky biofilms of the Douro River estuary, Portugal.

    PubMed

    Magalhães, Catarina M; Joye, Samantha B; Moreira, Rosa M; Wiebe, William J; Bordalo, Adriano A

    2005-05-01

    The regulatory effects of salinity and inorganic nitrogen compounds on nitrification and denitrification were studied in intertidal sandy sediments and rocky biofilms in the Douro River estuary, Portugal, over a 12-month period. Nitrification and denitrification rates were measured in slurries of field samples and enrichment experiments using the difluoromethane and the acetylene inhibition techniques, respectively. Salinity did not regulate denitrification in either environment, suggesting that halotolerant bacteria dominated the denitrifier communities. However, nitrification rates were stimulated when salinity increased from 0 to 15 practical salinity units. NO3- addition experiments revealed that NO3- availability stimulates denitrification rates in sandy sediments, but not in rocky biofilms; however, in rocky biofilms a positive and linear relationship was observed between denitrification rates and water column NO3- concentrations (r=0.92) during the monthly surveys. The N2O:N2 ratios increased rapidly when NO3- increased from 63 to 363 microM; however, results from monthly surveys showed that environmental parameters other than NO3- availability may be important in controlling the variation in N2O production via denitrification. Ammonium additions to sandy sediments stimulated nitrification rates by 35% for the 20 microM NH4+ addition, but NH4+ appeared to inhibit nitrification at high concentration addition (200 microM NH4+). In contrast, rocky biofilm nitrification was stimulated by 65% when 200 microM NH4+ was added.

  4. 8. View of Bronx (east) side of swing span looking ...

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

    8. View of Bronx (east) side of swing span looking north, showing masonry rest pier and truss sway bracing. (Nov. 25, 1988) - University Heights Bridge, Spanning Harlem River at 207th Street & West Harlem Road, New York County, NY

  5. 75 FR 76279 - Drawbridge Operation Regulation; Upper Mississippi River, Burlington, IA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-08

    ... bridge owner time to replace the swing span with a lift span and to construct the right descending tower... the Truman-Hobbs alteration. The new lift span will be set in place and the right descending tower...

  6. 34. Photographic copy of original construction plan (Wabasha Street Bridge, ...

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

    34. Photographic copy of original construction plan (Wabasha Street Bridge, Cantilever Span 1888); web details of cantilever arm connecting first span to first pier - Wabasha Street Bridge, Spanning Mississippi River at Wabasha Street, Saint Paul, Ramsey County, MN

  7. 17. View of Tombigbee River Bridge showing same broken railing ...

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

    17. View of Tombigbee River Bridge showing same broken railing as was shown in photograph no. MS-13-16. View is from the ground looking northwest. - Tombigbee River Bridge, Spanning Tombigbee River at State Highway 182, Columbus, Lowndes County, MS

  8. Synthesis of monthly and annual streamflow records (water years 1950-2003) for Big Sandy, Clear, Peoples, and Beaver Creeks in the Milk River basin, Montana

    USGS Publications Warehouse

    Parrett, Charles

    2006-01-01

    To address concerns expressed by the State of Montana about the apportionment of water in the St. Mary and Milk River basins between Canada and the United States, the International Joint Commission requested information from the United States government about water that originates in the United States but does not cross the border into Canada. In response to this request, the U.S. Geological Survey synthesized monthly and annual streamflow records for Big Sandy, Clear, Peoples, and Beaver Creeks, all of which are in the Milk River basin in Montana, for water years 1950-2003. This report presents the synthesized values of monthly and annual streamflow for Big Sandy, Clear, Peoples, and Beaver Creeks in Montana. Synthesized values were derived from recorded and estimated streamflows. Statistics, including long-term medians and averages and flows for various exceedance probabilities, were computed from the synthesized data. Beaver Creek had the largest median annual discharge (19,490 acre-feet), and Clear Creek had the smallest median annual discharge (6,680 acre-feet). Big Sandy Creek, the stream with the largest drainage area, had the second smallest median annual discharge (9,640 acre-feet), whereas Peoples Creek, the stream with the second smallest drainage area, had the second largest median annual discharge (11,700 acre-feet). The combined median annual discharge for the four streams was 45,400 acre-feet. The largest combined median monthly discharge for the four creeks was 6,930 acre-feet in March, and the smallest combined median monthly discharge was 48 acre-feet in January. The combined median monthly values were substantially smaller than the average monthly values. Overall, synthesized flow records for the four creeks are considered to be reasonable given the prevailing climatic conditions in the region during the 1950-2003 base period. Individual estimates of monthly streamflow may have large errors, however. Linear regression was used to relate logarithms of combined annual streamflow to water years 1950-2003. The results of the regression analysis indicated a significant downward trend (regression line slope was -0.00977) for combined annual streamflow. A regression analysis using data from 1956-2003 indicated a slight, but not significant, downward trend for combined annual streamflow.

  9. 77 FR 76420 - Final Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-28

    ... Fort Gay, confluence. Unincorporated Areas of Wayne County. At the Tug Fork +575 confluence. Mill Creek (backwater effects from From the Tug Fork +575 Town of Fort Gay. Tug Fork). confluence to approximately 1.1 miles upstream of the Tug Fork confluence. Tug Fork At the Big Sandy River +575 Town of Fort Gay...

  10. Noodling for Mollusks

    ERIC Educational Resources Information Center

    Sukkestad, Kathryn; Curran, Mary Carla

    2012-01-01

    Mollusks, such as mussels and snails, are a great group to noodle because they are prevalent in banks and bottoms of river basins and in sandy beach habitats. Furthermore, their shells are easy to come by and safe to handle. There are six classes within the phylum Mollusca. In the activities described in this article, the authors focus on the…

  11. Smith Assists in Superstorm Sandy Relief Efforts | Poster

    Cancer.gov

    By Cathy McClintock, Guest Writer It should have been routine by now for a 30-year volunteer firefighter/ emergency medical technician from Thurmont, Md., but it wasn’t. That first night, as Ross Smith, IT security, looked across the Hudson River from Jersey City, N.J., he saw an unusually dark New York skyline.

  12. Evidence of Active Dune Sand on the Great Plains in the 19th Century from Accounts of Early Explorers

    NASA Astrophysics Data System (ADS)

    Muhs, Daniel R.; Holliday, Vance T.

    1995-03-01

    Eolian sand is extensive over the Great Plains of North America, but is at present mostly stabilized by vegetation. Accounts published by early explorers, however, indicate that at least parts of dune fields in Nebraska, Colorado, Kansas, New Mexico, and Texas were active in the 19th century. Based on an index of dune mobility and a regional tree-ring record, the probable causes for these periods of greater eolian activity are droughts, accompanied by higher temperatures, which greatly lowered the precipitation-to-evapotranspiration ratio and diminished the cover of stabilizing vegetation. In addition, observations by several explorers, and previous historical studies, indicate that rivers upwind of Great Plains dune fields had shallow, braided, sandy channels, as well as intermittent flow in the 19th century. Wide, braided, sandy rivers that were frequently dry would have increased sand supplies to active dune fields. We conclude that dune fields in the Great Plains are extremely sensitive to climate change and that the potential for reactivation of stabilized dunes in the future is high, with or without greenhouse warming.

  13. Cottonwood Management Plan / Draft Programmatic Environmental Assessment. Proposed Implementation of a Cottonwood Management Plan Along Six Priority Segments of the Missouri River

    DTIC Science & Technology

    2010-02-01

    floodplain ridges, levees, and road embankments), concave-up areas ( depressions , such as river channels, floodplain swales, and drainage ditches), and areas... depressions in dry, open, sandy areas with less than 30 percent vegetative cover and plant heights less than 1 foot (from USFWS 1990b; USFWS, 1990c as...U.S. Department of the Interior, NPS and the U.S. Army Corps of Engineers. National Park Service (NPS). 2007. First Annual Centennial Strategy for

  14. Archeological Data Recovery by Controlled Surface Collection in the Portion of 23SO496 to be Adversely Affected by the Castor River Enlargement Project, Stoddard County, Missouri

    DTIC Science & Technology

    1990-04-01

    Breckenridge and Tom’s Brook shelters). During this long period a large number of different projectile point types were produced (i.e., Rice Lobed...Big Sandy, Graham Cave, Kirk Comer Notched, White River Archaic, Hidden Valley Stemmed, Hardin Barbed, Searcy, Rice Lanceolate, Jakie Stemmed, and...point did not exhibit basal grinding); one was a Middle Archaic point similar to the Rice Lobed; two were Late Archaic Rice Sidenotched; five were

  15. Sediment Equilibrium and Diffusive Fluxes in Relation to Phosphorus Dynamics in the Turbid Minnesota River

    DTIC Science & Technology

    2009-01-01

    extractable P and K in a sandy clay loam soil under continuous corn ( Zea mays L .). Can J Soil Sci 75:361-367. Zhang, T. Q., A. F. MacKenzie, B. C...diffusive P flux from deposited sediment stored in river channels may also play a role in soluble P control. Ranges in equilibrium partitioning between...largest plants in the State of Minnesota, discharge (average discharge = 1.8 m3 s-1) at effluent P concentrations of 1.5 mg L -1 or less. A 538-megawatt

  16. 1. FIGUEROA STREET AND LOS ANGELES RIVER VIADUCTS AND INTERSTATE ...

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

    1. FIGUEROA STREET AND LOS ANGELES RIVER VIADUCTS AND INTERSTATE 1-5 INTERCHANGE. LOOKING 356°N. - Arroyo Seco Parkway, Figueroa Street Viaduct, Spanning Los Angeles River, Los Angeles, Los Angeles County, CA

  17. 32. Another type of upper superstructure assembly found on the ...

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

    32. Another type of upper superstructure assembly found on the 1st and 4th spans. View is of north side of 4th span. - Cleves Bridge, Spanning Great Miami River on U.S. Highway 50, Cleves, Hamilton County, OH

  18. 9. SEATING OF GIRDER SPAN AT SOUTH ABUTMENT. FABRICATOR'S PLATE ...

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

    9. SEATING OF GIRDER SPAN AT SOUTH ABUTMENT. FABRICATOR'S PLATE READS 'VIRGINIA BRIDGE COMPANY 1950,' ACCOMPANIED BY THE LOGO OF UNITED STATES STEEL. - George P. Coleman Memorial Bridge, Spanning York River at U.S. Route 17, Yorktown, York County, VA

  19. 1. Photocopy of engineering drawing (original in the Office of ...

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

    1. Photocopy of engineering drawing (original in the Office of the Cuyahoga County Engineer)--1907 NORTH ROCKY RIVER BRIDGE--PROPOSED DESIGN--REINFORCED CONCRETE: AN ALTERNATIVE DESIGN FOR THE DETROIT AVENUE CROSSING - Rocky River Bridge, Spanning Beaver Dam River, Rocky River, Cuyahoga County, OH

  20. 1. OVERALL VIEW OF INTAKE PIER AND ACCESS BRIDGE, LOOKING ...

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

    1. OVERALL VIEW OF INTAKE PIER AND ACCESS BRIDGE, LOOKING NORTHEAST FROM WESTERN LEVEE OF THE SACRAMENTO RIVER. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  1. Food Webs without Borders? Watershed-coast Interactions Influence Diet Sources of Fish in the St. Louis River

    EPA Science Inventory

    Complex ecosystems form where coastal rivers enter the Laurentian Great Lakes. These ecosystems span a river-to-Great Lake transition zone encompassing a mosaic of river channel, drowned river mouth, littoral, wetland and coastal habitats. Our goals were to determine whether we c...

  2. 76 FR 18669 - Safety Zone, Newport River; Morehead City, NC

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-05

    ...-AA00 Safety Zone, Newport River; Morehead City, NC AGENCY: Coast Guard, DHS. ACTION: Notice of proposed... River under the main span US 70/Morehead City--Newport River high rise bridge in Carteret County, NC... Newport River at Morehead City, North Carolina. The contract provides for cleaning, painting, and steel...

  3. 76 FR 23227 - Safety Zone, Newport River; Morehead City, NC

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-26

    ...-AA00 Safety Zone, Newport River; Morehead City, NC AGENCY: Coast Guard, DHS. ACTION: Notice of proposed... River under the main span US 70/Morehead City--Newport River high rise bridge in Carteret County, NC... Newport River at Morehead City, North Carolina. The contract provides for cleaning, painting, and steel...

  4. Nest placement of the giant Amazon river turtle, Podocnemis expansa, in the Araguaia River, Goiás State, Brazil.

    PubMed

    Ferreira, Paulo Dias Júnior; Castro, Paulo de Tarso Amorim

    2005-05-01

    The giant Amazon river turtle (Podocnemis expansa) nests on extensive sand bars on the margins and interior of the channel during the dry season. The high concentration of nests in specific points of certain beaches indicates that the selection of nest placement is not random but is related to some geological aspects, such as bar margin inclination and presence of a high, sandy platform. The presence of access channels to high platform points or ramp morphology are decisive factors in the choice of nesting areas. The eroded and escarped margins of the beaches hinder the Amazon river turtle arriving at the most suitable places for nesting. Through the years, changes in beach morphology can alter nest distribution.

  5. Evaluation of physicochemical and physical habitat associations for Cambarus callainus (Big Sandy crayfish), an imperilled crayfish endemic to the Central Appalachians

    USGS Publications Warehouse

    Loughman, Zachary J.; Welsh, Stuart A.; Sadecky, Nicole M.; Dillard, Zachary W.; Scott, R. Katie

    2017-01-01

    1. Crayfish represent one of the most imperilled animal groups on the planet. Habitat degradation, destruction and fragmentation, introduction of invasive crayfishes, and a lack of applied biological information have all been identified as agents thwarting crayfish conservation.2. Cambarus callainus was warranted federal protection by the United States Fish and Wildlife Service (USFWS) in April, 2016. As part of the USFWS listing procedure, a survey for C. callainus in the Big Sandy River catchment was conducted to determine points of occurrence with a secondary objective of determining reach level physical habitat and physicochemical correlates of C. callainus presence and absence.3. At each site, physicochemical and physical habitat data were collected to determine the influence of abiotic covariates on the presence of C. callainus. Cambarus callainus presence or absence and associated site covariates were modelled using logistic regression.4. Survey results recorded C. callainus at 39 sites in the Upper Levisa Fork (ULF) and Tug Fork (TF) drainages of the Big Sandy River; no C. callainus were collected in the Lower Levisa Fork (LLF). An additive effects model of physical habitat quality (Basin + Boulder presence/embeddedness) was the only model selected, supporting an association of C. callainus with slab boulders, open interstitial spaces, and moderate to no sedimentation. All sites lacking C. callainus were experiencing some degree of sedimentation. Physicochemical covariates were not supported by the data.5. Results indicated that good quality habitat was lacking in the LLF, but was present in the ULF and TF catchments, with ULF supporting the most robust populations and most suitable habitat. Effective conservation for C. callainus should focus on efforts that limit sedimentation as well as restore good quality instream habitat in the greater Big Sandy catchment.

  6. Estimation of Nitrogen Pools in Irrigated Potato Production on Sandy Soil Using the Model SUBSTOR

    PubMed Central

    Prasad, Rishi; Hochmuth, George J.; Boote, Kenneth J.

    2015-01-01

    Recent increases in nitrate concentrations in the Suwannee River and associated springs in northern Florida have raised concerns over the contributions of non-point sources. The Middle Suwannee River Basin (MSRB) is of special concern because of prevalent karst topography, unconfined aquifers and sandy soils which increase vulnerability of the ground water contamination from agricultural operations- a billion dollar industry in this region. Potato (Solanum tuberosum L.) production poses a challenge in the area due to the shallow root system of potato plants, and low water and nutrient holding capacity of the sandy soils. A four-year monitoring study for potato production on sandy soil was conducted on a commercial farm located in the MSRB to identify major nitrogen (N) loss pathways and determine their contribution to the total environmental N load, using a partial N budget approach and the potato model SUBSTOR. Model simulated environmental N loading rates were found to lie within one standard deviation of the observed values and identified leaching loss of N as the major sink representing 25 to 38% (or 85 to 138 kg ha-1 N) of the total input N (310 to 349 kg ha-1 N). The crop residues left in the field after tuber harvest represented a significant amount of N (64 to 110 kg ha-1N) and posed potential for indirect leaching loss of N upon their mineralization and the absence of subsequent cover crops. Typically, two months of fallow period exits between harvest of tubers and planting of the fall row crop (silage corn). The fallow period is characterized by summer rains which pose a threat to N released from rapidly mineralizing potato vines. Strategies to reduce N loading into the groundwater from potato production must focus on development and adoption of best management practices aimed on reducing direct as well as indirect N leaching losses. PMID:25635904

  7. 16. Typical end post, top chord, bottom chord, vertical lattice ...

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

    16. Typical end post, top chord, bottom chord, vertical lattice and diagonal connections for the 2nd and 3rd spans. View is of south side of 3rd span just west of its connection with the 4th span. - Cleves Bridge, Spanning Great Miami River on U.S. Highway 50, Cleves, Hamilton County, OH

  8. 27. Typical end post, top chord, bottom chord, vertical lattice ...

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

    27. Typical end post, top chord, bottom chord, vertical lattice and diagonal connections for the 1st and 4th spans. View is of south side of 4th span just east of its connection with the 3rd span. - Cleves Bridge, Spanning Great Miami River on U.S. Highway 50, Cleves, Hamilton County, OH

  9. DOE Office of Scientific and Technical Information (OSTI.GOV)

    Sobocinski, Kathryn L.; Johnson, Gary E.; Sather, Nichole K.

    This document is the first annual report for the study titled “Ecology of Juvenile Salmonids in Shallow Tidal Freshwater Habitats in the Vicinity of the Sandy River Delta in the Lower Columbia River.” Hereafter, we refer to this research as the Tidal Freshwater Monitoring (TFM) Study. The study is part of the research, monitoring, and evaluation effort developed by the Action Agencies (Bonneville Power Administration, U.S. Army Corps of Engineers, U.S. Bureau of Reclamation) in response to obligations arising from the Endangered Species Act as a result of operation of the Federal Columbia River Power System (FCRPS). The project ismore » performed under the auspices of the Northwest Power and Conservation Council’s Columbia Basin Fish and Wildlife Program.« less

  10. Biogeographic patterns in life history traits of the Pan-American sandy beach isopod Excirolana braziliensis

    NASA Astrophysics Data System (ADS)

    Cardoso, Ricardo S.; Defeo, Omar

    2004-11-01

    Biogeographic patterns in life history traits of the Pan-American sandy beach isopod Excirolana braziliensis were analyzed to determine latitudinal variations along its distribution, from tropical (9°N) to temperate (39°S) sandy beaches in Atlantic and Pacific oceans. Population features exhibited systematic geographical patterns of variation: (1) an increase in individual sizes and growth rates towards temperate beaches, following an inverse relationship with mean water temperature of the surf zone; (2) a shift from almost continuous to seasonal growth from subtropical to temperate Atlantic beaches and a positive relationship between amplitude of intra-annual growth oscillations and temperature range; (3) a linear decrease in life span and an increase in natural mortality from temperate to subtropical beaches; and (4) an increase in the individual mass-at-size (length-mass relationship) from subtropical to temperate beaches. Analyses discriminated by sex were consistent with the patterns illustrated above. Local effects of temperature and beach morphodynamics are discussed. Our results demonstrate that the population dynamics of E. braziliensis is highly plastic over latitudinal gradients, with large-scale variations in temperature and concurrent environmental variables leading to an adjustment of the phenotype-environment relationship.

  11. 42. Fixed Span; General View of the Floor Beam, Stringer, ...

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

    42. Fixed Span; General View of the Floor Beam, Stringer, & Lateral Bracing System; looking S. (from near to far: 6L & R, 5L & R, 4 L & R). - Pacific Shortline Bridge, U.S. Route 20,spanning Missouri River, Sioux City, Woodbury County, IA

  12. 7. Typical top chord, vertical lattice, diagonals and strut assembly ...

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

    7. Typical top chord, vertical lattice, diagonals and strut assembly for the 1st and 4th spans. View is of north side of 1st span. - Cleves Bridge, Spanning Great Miami River on U.S. Highway 50, Cleves, Hamilton County, OH

  13. 20. VIEW TO SOUTHEAST AT CENTERLINE (U37) WHERE SWING SPANS ...

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

    20. VIEW TO SOUTHEAST AT CENTERLINE (U37) WHERE SWING SPANS MEET. PIVOT PIER 1N AT LEFT, PIVOT PIER 1S AT RIGHT. - George P. Coleman Memorial Bridge, Spanning York River at U.S. Route 17, Yorktown, York County, VA

  14. 18. INTAKE PIER, BRIDGE DETAILS, SHEET 9 OF 117, 1920. ...

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

    18. INTAKE PIER, BRIDGE DETAILS, SHEET 9 OF 117, 1920. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  15. Impact. The southwest end is down, as the buckled middle ...

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

    Impact. The southwest end is down, as the buckled middle section splashes into the river. View is to southeast from confluence of Trinity and South Fork Trinity Rivers - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  16. LOOKING EASTSOUTHEAST. Showing downstream side of completed bridge, from confluence ...

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

    LOOKING EAST-SOUTHEAST. Showing downstream side of completed bridge, from confluence of Trinity and South Fork Trinity Rivers - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  17. View of the Colorado River Canyon showing lower portal road ...

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

    View of the Colorado River Canyon showing lower portal road in background taken from the rim of Hoover Dam, view south - Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark County, NV

  18. View of the Colorado River Canyon form the Nevada side ...

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

    View of the Colorado River Canyon form the Nevada side showing the Nevada rim towers and portions of US 93, view south - Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark County, NV

  19. View of Nevada side of Colorado River Canyon showing US ...

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

    View of Nevada side of Colorado River Canyon showing US 93 in foreground, transmission towers and static towers in background, view west - Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark County, NV

  20. Stable Isotope Analysis of Precipitation Samples Obtained via Crowdsourcing Reveals the Spatiotemporal Evolution of Superstorm Sandy

    PubMed Central

    Good, Stephen P.; Mallia, Derek V.; Lin, John C.; Bowen, Gabriel J.

    2014-01-01

    Extra-tropical cyclones, such as 2012 Superstorm Sandy, pose a significant climatic threat to the northeastern United Sates, yet prediction of hydrologic and thermodynamic processes within such systems is complicated by their interaction with mid-latitude water patterns as they move poleward. Fortunately, the evolution of these systems is also recorded in the stable isotope ratios of storm-associated precipitation and water vapor, and isotopic analysis provides constraints on difficult-to-observe cyclone dynamics. During Superstorm Sandy, a unique crowdsourced approach enabled 685 precipitation samples to be obtained for oxygen and hydrogen isotopic analysis, constituting the largest isotopic sampling of a synoptic-scale system to date. Isotopically, these waters span an enormous range of values (21‰ for O, 160‰ for H) and exhibit strong spatiotemporal structure. Low isotope ratios occurred predominantly in the west and south quadrants of the storm, indicating robust isotopic distillation that tracked the intensity of the storm's warm core. Elevated values of deuterium-excess (25‰) were found primarily in the New England region after Sandy made landfall. Isotope mass balance calculations and Lagrangian back-trajectory analysis suggest that these samples reflect the moistening of dry continental air entrained from a mid-latitude trough. These results demonstrate the power of rapid-response isotope monitoring to elucidate the structure and dynamics of water cycling within synoptic-scale systems and improve our understanding of storm evolution, hydroclimatological impacts, and paleo-storm proxies. PMID:24618882

  1. 2. OVERALL VIEW OF INTAKE PIER AND ACCESS BRIDGE, LOOKING ...

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

    2. OVERALL VIEW OF INTAKE PIER AND ACCESS BRIDGE, LOOKING NORTH. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  2. 15. SUPERSTRUCTURE PLANS, ELEVATION AND DETAILS, SHEET 4 OF 117, ...

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

    15. SUPERSTRUCTURE PLANS, ELEVATION AND DETAILS, SHEET 4 OF 117, 1920. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  3. 16. INTAKE PIER, PLANS ELEVATIONS, AND SECTIONS, SHEETS 5 OF ...

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

    16. INTAKE PIER, PLANS ELEVATIONS, AND SECTIONS, SHEETS 5 OF 117, 1920. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  4. 4. DETAIL OF THE BRIDGE PIER SHOWING THE SUSPENSION CABLE, ...

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

    4. DETAIL OF THE BRIDGE PIER SHOWING THE SUSPENSION CABLE, LOOKING SOUTHWEST. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  5. 3. APPROACH TO THE ACCESS BRIDGE AND INTAKE PIER, LOOKING ...

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

    3. APPROACH TO THE ACCESS BRIDGE AND INTAKE PIER, LOOKING SOUTHWEST. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  6. 19. INTAKE CONDUITS, PROFILE, SECTIONS, AND DETAILS, SHEET 10 OF ...

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

    19. INTAKE CONDUITS, PROFILE, SECTIONS, AND DETAILS, SHEET 10 OF 117, 1920. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  7. 7. DETAIL OF INTAKE PIER, LOOKING SOUTHWEST FROM EASTERN SACRAMENTO ...

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

    7. DETAIL OF INTAKE PIER, LOOKING SOUTHWEST FROM EASTERN SACRAMENTO LEVEE. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  8. 20. COMPLETION OF INTAKE CONDUITS, PLANS, PROFILES, AND DETAILS, SHEET ...

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

    20. COMPLETION OF INTAKE CONDUITS, PLANS, PROFILES, AND DETAILS, SHEET 115 OF 117, 1922. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  9. 12. INTERIOR VIEW OF GATE OPERATOR ROOM, SHOWING SLIDES GATE ...

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

    12. INTERIOR VIEW OF GATE OPERATOR ROOM, SHOWING SLIDES GATE OPERATORS, LOOKING NORTHWEST. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  10. Dust trailing from the top chord, the bridge falls toward ...

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

    Dust trailing from the top chord, the bridge falls toward the river, as the southwest end (right) falls first. View southeast from confluence of Trinity and South Fork Trinity Rivers - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  11. 18. View of Tombigbee River Bridge facing east showing upstream ...

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

    18. View of Tombigbee River Bridge facing east showing upstream side of bridge opposite broken railing located on the downstream side. Fallen power pole and telephone cable is shown in the center of the photograph. - Tombigbee River Bridge, Spanning Tombigbee River at State Highway 182, Columbus, Lowndes County, MS

  12. 17. INTAKE PIER, BRIDGE STRESS SHEET, SHEET 8 OF 117, ...

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

    17. INTAKE PIER, BRIDGE STRESS SHEET, SHEET 8 OF 117, 1920. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  13. 12. PIERS 5S AND 4S, SHOWING TRANSITION AT 4S FROM ...

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

    12. PIERS 5S AND 4S, SHOWING TRANSITION AT 4S FROM GIRDER SPAN TO 'SUSPENDED' TRUSS SPAN AT U0. VIEW LOOKING WEST. - George P. Coleman Memorial Bridge, Spanning York River at U.S. Route 17, Yorktown, York County, VA

  14. Overview of the Colorado River Canyon from the helicopter pad. ...

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

    Overview of the Colorado River Canyon from the helicopter pad. View of the Nevada side where new bridge will cross canyon, view northwest - Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark County, NV

  15. View of Nevada side of Colorado River Canyon showing US ...

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

    View of Nevada side of Colorado River Canyon showing US 93, Visitor Center parking lot, transmission lines, and static towers in background, view west - Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark County, NV

  16. 2. VIEW OF NORTH FACE SHOWING SUBSTRUCTURE AND ABUTMENTS OF ...

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

    2. VIEW OF NORTH FACE SHOWING SUBSTRUCTURE AND ABUTMENTS OF BRIDGE CROSSING THE SOUTH FORK OF THE TUOLUMNE RIVER. - South Fork Tuolumne River Bridge, Spanning South Fork Tuolumne River on Tioga Road, Mather, Tuolumne County, CA

  17. Silver Creek Mine Treatment is Golden in Protecting Schuylkill River

    EPA Pesticide Factsheets

    The Schuylkill River spans over 130 miles from its headwaters in Schuylkill County through several counties on to New Philadelphia where it joins the Delaware River. It serves a drinking water source for 1.5 million people.

  18. Beach-ridge sedimentology as an archive of terrestrial climate change: Insights from a geochemical and stratigraphic study of the Tijucas Strandplain, southern Brazil

    NASA Astrophysics Data System (ADS)

    Krask, J. L.; Hein, C. J.; Galy, V.; FitzGerald, D.; Henrique de Fontoura Klein, A.

    2017-12-01

    Whereas millennial-scale variations in climate forcing drives changes in terrestrial processes, which are in turn directly linked to fluvial sediment loads (e.g., weathering and erosion), the impact of decadal- to centennial- scale climate fluctuations on downstream coastal sedimentation patterns and landscape evolution remains unclear. Specifically, the connection between long-term (decades or more) precipitation seasonality and sediment export from river systems has not been established. This study examines the manner in which sub-millennial-scale fluctuations in precipitation over river catchments may be recorded in coastal progradational sedimentary archives. The 5-km wide Tijucas Strandplain (southern Brazil) formed over the last 5800 years through the rapid reworking of sediment discharged from the Tijucas River in a regime of falling sea level. In an overall regime shift from sand- to mud- dominance (linked to a long-term reduction in wave energy caused by bay shoaling) are nearly 70 distinct transitions between shore-parallel sand- and mud- dominated facies. Bulk organic carbon and terrestrial plant-wax fatty acid stable hydrogen (δD) and carbon (δ13C) isotopic measurements from sediments from select sandy and muddy ridges across the plain reveal that these two sedimentological regimes are geochemically distinct. Specifically, waxes from sediments deposited during periods of sandy progradation had δD values, on average, >10 ‰ higher than those from mud-dominated periods, indicating that these sedimentary units reflect different hydroclimatic conditions within the river drainage basin at the time of deposition. Comparison of plant wax isotopic signatures of river, bay, and beach sediments during the current period of mud-dominated progradation reveals a close correlation with earlier periods of mud deposition within the Tijucas Strandplain. Thus, decadal- to centennial- scale sedimentologic transitions within the plain are interpreted to reflect climate-driven changes in mud export rates, as product of modifications in river basin vegetation and soil formation and erosional processes.

  19. 5. VIEW FROM TRACK, LOOKING NORTH THROUGH SPANS (BURLINGTON NORTHERN ...

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

    5. VIEW FROM TRACK, LOOKING NORTH THROUGH SPANS (BURLINGTON NORTHERN RAILROAD BRIDGE ON RIGHT) - Yakima Valley Transportation Company Interurban Railroad, Naches River Bridge, Yakima, Yakima County, WA

  20. 25. VIEW EAST IN BRIDGE TENDER'S HOUSE, (left) ORIGINAL LEVERS ...

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

    25. VIEW EAST IN BRIDGE TENDER'S HOUSE, (left) ORIGINAL LEVERS FOR GASOLINE ENGINE OPERATION OF SWING-SPAN, (right) PANEL F ELECTRIC OPERATION OF GATES AND SWING-SPAN; new bridge located in background - Tipers Bridge, Spanning Great Wicomico River at State Route 200, Kilmarnock, Lancaster County, VA

  1. PLANT AND PIER #2 EXCAVATION. View is to the northeast, ...

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

    PLANT AND PIER #2 EXCAVATION. View is to the northeast, looking from Humboldt County side of river toward Trinity County side - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  2. COMPLETED STRUCTURE. View is eastsoutheast of downstream side of bridge, ...

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

    COMPLETED STRUCTURE. View is east-southeast of downstream side of bridge, from beyond confluence of Trinity and South Fork Trinity Rivers - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  3. 7. View to southeast. View of downstream side of bridge ...

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

    7. View to southeast. View of downstream side of bridge from confluence of Trinity and South Fork Trinity Rivers. (90mm Lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  4. 4. A river level view of the Broad Street bridge ...

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

    4. A river level view of the Broad Street bridge and Columbus skyline from the railroad truss north of the bridge. - Broad Street Bridge, Spanning Scioto River at U.S. Route 40 (Broad Street), Columbus, Franklin County, OH

  5. View of Nevada side of Colorado River Canyon taken from ...

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

    View of Nevada side of Colorado River Canyon taken from Lower Portal Road looking up towards area where new bridge will be located, view northwest - Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark County, NV

  6. View of Arizona side of Colorado River Canyon taken from ...

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

    View of Arizona side of Colorado River Canyon taken from Lower Portal Road looking up towards area where new bridge will be located, view northeast - Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark County, NV

  7. 10. DETAIL VIEW OF LOWER LEVEL OF INTAKE PIER SHOWING ...

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

    10. DETAIL VIEW OF LOWER LEVEL OF INTAKE PIER SHOWING THE RIVER HEIGHT INDICATOR, ONE OF THE FIVE GATE OPENINGS, AND MOORINGS, LOOKING SOUTHWEST. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  8. 5. OBLIQUE VIEW OF INTAKE PIER AND ACCESS BRIDGE, LOOKING ...

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

    5. OBLIQUE VIEW OF INTAKE PIER AND ACCESS BRIDGE, LOOKING SOUTHWEST, FROM THE EASTERN LEVEE. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  9. 21. COMPLETION OF INTAKE CONDUITS REVISED, PIPE SECTIONS AND PLANS, ...

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

    21. COMPLETION OF INTAKE CONDUITS REVISED, PIPE SECTIONS AND PLANS, SHEET 117 OF 117, 1922. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  10. 13. INTERIOR VIEW OF GATE OPERATOR ROOM, SHOWING UNFINISHED CONCRETE ...

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

    13. INTERIOR VIEW OF GATE OPERATOR ROOM, SHOWING UNFINISHED CONCRETE WALLS AND SLIDE GATE OPERATORS, LOOKING NORTH. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  11. 8. VIEW OF ACCESS BRIDGE AND INTAKE PIER FROM THE ...

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

    8. VIEW OF ACCESS BRIDGE AND INTAKE PIER FROM THE BRIDGE PIER ABUTMENT, LOOKING NORTHEAST. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  12. 78 FR 48085 - Safety Zones; Chelsea River, Boston Inner Harbor, Boston, MA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-07

    ...-AA00 Safety Zones; Chelsea River, Boston Inner Harbor, Boston, MA AGENCY: Coast Guard, DHS. ACTION... for the Chelsea River, Boston Inner Harbor, Boston, MA. Since the implementation of the regulation... spanned the Chelsea River providing a means for vehicles to travel between Chelsea, MA and East Boston, MA...

  13. 76 FR 5686 - Drawbridge Operation Regulation; Pocomoke River, Pocomoke City, MD

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-02

    ... Operation Regulation; Pocomoke River, Pocomoke City, MD AGENCY: Coast Guard, DHS. ACTION: Notice of... River, mile 15.6, at Pocomoke City, MD. The deviation restricts the operation of the draw span to.... The Route 675 Bridge across Pocomoke River, mile 15.6 at Pocomoke City MD, has a vertical clearance in...

  14. 76 FR 11960 - Drawbridge Operation Regulation; Cape Fear River, Wilmington, NC

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-04

    ... Operation Regulation; Cape Fear River, Wilmington, NC AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... deviation from the regulation governing the operation of the Cape Fear River Memorial Bridge, across the Cape Fear River, mile 26.8, at Wilmington, NC. The deviation restricts the operation of the draw span...

  15. 75 FR 44916 - Drawbridge Operation Regulation; Cape Fear River, Wilmington, NC

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-30

    ... Operation Regulation; Cape Fear River, Wilmington, NC AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... deviation from the regulation governing the operation of the Cape Fear River Memorial Bridge, across the Cape Fear River, mile 26.8, at Wilmington, NC. The deviation restricts the operation of the draw span...

  16. 76 FR 38018 - Safety Zone, Newport River; Morehead City, NC

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-29

    ...-AA00 Safety Zone, Newport River; Morehead City, NC AGENCY: Coast Guard, DHS. ACTION: Temporary final... the main span US 70/Morehead City-Newport River high rise bridge in Carteret County, NC. This safety...) entitled Safety Zone, Newport River; Morehead City, North Carolina in the Federal Register (33 FR 165). We...

  17. 76 FR 29645 - Safety Zone, Newport River; Morehead City, NC

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-23

    ...-AA00 Safety Zone, Newport River; Morehead City, NC AGENCY: Coast Guard, DHS. ACTION: Temporary final... the main span US 70/Morehead City--Newport River high rise bridge in Carteret County, NC. This safety... Zone, Newport River; Morehead City, North Carolina in the Federal Register (33 FR 165). We received no...

  18. Detailed view of one (1) arm of the swing bridge ...

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

    Detailed view of one (1) arm of the swing bridge cantilevering out from the center/pivot pier on which the entire span is balanced at its center when in the open position. Both arms of the span have equal length. Note that the members are pin-connected at their connections (joints). - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  19. Upper Mississippi River Headwaters Reservoirs Damsites Cultural Resources Investigation. Lake Winnibigoshish, Leech Lake, Pokegema Lake, Sandy Lake, Pine River and Gull Lake Reservoirs, Minnesota

    DTIC Science & Technology

    1988-02-01

    Anthony Falls Water Company, who deeded 1995 acres of land at Gull Lake for the purpose (Kane, 1966: 159). Despite the unique nature of the reservoir system...dwelling, laborers’ quarters, engineers’ quarters, a dining hall, an office building, an officer’s ho.se, a wood shed, a chicken coop, a barn, a...a barn, carpenter and blacksmith shops, two warehouses, a wood shed and a chicken coop (Figure 42). The "new" dwelling was destroyed by another fire

  20. 77. VIEW SHOWING CONDITION OF OLD M STREET BRIDGE PIER ...

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

    77. VIEW SHOWING CONDITION OF OLD M STREET BRIDGE PIER 1 DOLPHIN, LOOKING SOUTHEAST, March 1, 1935. (Steamer Delta King is moored at River Lines Terminal.) - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  1. Stream response to repeated coseismic folding, Tiptonville dome, New Madrid seismic zone

    NASA Astrophysics Data System (ADS)

    Guccione, M. J.; Mueller, K.; Champion, J.; Shepherd, S.; Carlson, S. D.; Odhiambo, B.; Tate, A.

    2002-03-01

    Fluvial response to tectonic deformation is dependent on the amount and style of surface deformation and the relative size of the stream. Active folding in the New Madrid seismic zone (NMSZ) forms the Tiptonville dome, a 15-km long and 5-km wide surface fold with up to 11 m of late Holocene structural relief. The fold is crossed by streams of varying size, from the Mississippi River to small flood-plain streams. Fluvial response of these streams to repeated coseismic folding has only been preserved for the past 2.3 ka, since the Tiptonville meander of the Mississippi River migrated across the area forming the present flood plain. This surface comprises a sandy point-bar deposit locally overlain by clayey overbank and silty sand crevasse-splay deposits, an abandoned chute channel infilled with laminated sandy silt and silty clay, and an abandoned neck cutoff filled with a sandy cutoff bar and silty clay oxbow lake deposits. Dating various stream responses to coseismic folding has more tightly constrained the timing of earthquake events in the central NMSZ and provides a means of partitioning the deformation amount into individual seismic events. Three earthquakes have been dated in the Reelfoot Lake area, ca. A.D. 900, 1470, and 1812. The latter two earthquakes had large local coseismic deformation. Both of these events were responsible for numerous stream responses such as shifting depocenters, modification of Mississippi River channel geometry, and derangement of small streams. Overbank sedimentation ceased on the dome as it was uplifted above the normal flood stage, and sedimentation of crevasse-splay deposits from the Mississippi River, colluvium from the scarp, and lacustrine sediment accumulated in the adjacent Reelfoot basin. The much larger Mississippi River channel responded to uplift by increasing its sinuosity across the uplift relative to both upstream and downstream, increasing its width/depth ratio across and downstream of the uplift, and decreasing the width/depth ratio upstream of the uplift. Despite the size of the Mississippi River, it has not yet attained equilibrium since the latest uplift 190 years ago. Small channels that could not downcut through the uplift were filled, locally reversed flow direction, or formed a lake where they were dammed. Uplift and stream response to folding along the Tiptonville dome is less dramatic between 2.3 and 0.53 ka. During this interval, abandoned channel fill and overbank deposition across the dome suggests that it was not a high-relief feature. One earthquake event occurred during this interval (ca. A.D. 900), but coseismic stream response was probably limited to a slight aggradation of a small flood-plain stream.

  2. 8. View of Clark Fork Vehicle Bridge facing southwest. Looking ...

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

    8. View of Clark Fork Vehicle Bridge facing southwest. Looking at understructure of northernmost span. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  3. 20. View of Clark Fork Vehicle Bridge facing up. Looking ...

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

    20. View of Clark Fork Vehicle Bridge facing up. Looking at understructure of northernmost span. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  4. 75 FR 18055 - Drawbridge Operation Regulation; Mermentau River, Grand Chenier, LA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-09

    ... electrical and mechanical repairs pertaining to the bridge's main span drive assembly and system components... in order to perform electrical and mechanical repairs pertaining to the bridge's main span drive...

  5. Longitudinal differences in habitat complexity and fish assemblage structure of a great plains river

    USGS Publications Warehouse

    Eitzmann, J.L.; Paukert, C.P.

    2010-01-01

    We investigated the spatial variation in the Kansas River (USA) fish assemblage to determine how fish community structure changes with habitat complexity in a large river. Fishes were collected at ten sites throughout the Kansas River for assessing assemblage structure in summer 2007. Aerial imagery indicated riparian land use within 200 m from the river edge was dominated by agriculture in the upper river reaches (>35) and tended to increase in urban land use in the lower reaches (>58). Instream habitat complexity (number of braided channels, islands) also decreased with increased urban area (<25). Canonical correspondence analysis indicated that species that prefer high-velocity flows and sandy substrate (e.g., blue sucker Cycleptus elongatus and shovelnose sturgeon Scaphirhynchus platorynchus) were associated with the upper river reaches. Abundance of omnivorous and planktivorous fish species were also higher in the lower river. The presence of fluvial dependent and fluvial specialist species was associated with sites with higher water flows, more sand bars, and log jams. Our results suggest that conserving intolerant, native species in the Kansas River may require maintaining suitable habitat for these species and restoration of impacted areas of the river.

  6. 41. Reconstruction of roadway; view of swing span looking northwest ...

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

    41. Reconstruction of roadway; view of swing span looking northwest from Bronx approach, showing new apron under construction-concrete foundation partly built. Note trolley in background and broken asphalt in roadway bed. December 15, 1925 photograph. - University Heights Bridge, Spanning Harlem River at 207th Street & West Harlem Road, New York County, NY

  7. 77 FR 42432 - Drawbridge Operation Regulations; Niantic River, Niantic, CT

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-19

    ... work on machinery and the lift span. DATES: This deviation is effective from 9 p.m. on July 15, 2012... order to facilitate completion of machinery installation and lift span work at the new railroad bridge... and lift span work may continue. This scenario was presented to the Amtrak Annual Boaters Meeting on...

  8. 76 FR 26606 - Drawbridge Operation Regulation; Neches River, Beaumont, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-09

    ... deviation from the regulation governing the operation of the KCS vertical lift span bridge across the Neches... Southern Railroad has requested a temporary deviation from the operating schedule of the vertical lift span... in the open-to-navigation position. In accordance with 33 CFR 117.971, the vertical lift span of the...

  9. Elucidating the effects of river fluctuation on microbial removal during riverbank filtration

    NASA Astrophysics Data System (ADS)

    Derx, J.; Sommer, R.; Farnleitner, A. H.; Blaschke, A. P.

    2010-12-01

    The transfer of microbial pathogens from surface or waste water can have adverse effects on groundwater quality at riverbank filtration sites. Previous studies on groundwater protection in sandy unconfined aquifers with the focus on virus transport and health based water quality targets, such as done in the Netherlands, revealed larger protection zones than zones limited by 60 days of groundwater travel time. The 60 days of travel time are the design criterion in Austria for drinking water protection. However, in gravel aquifers, microbial transport processes differ significantly to those in sandy aquifers. Preferential flow and aquifer heterogeneities dominate microbial transport in sandy gravels and gravel aquifers. Microbial mass transfer and dual domain transport models were used previously to reproduce these effects. Furthermore, microbial transport has mainly been studied in the field during steady state groundwater flow situations. Hence, previous microbial transport models have seldom accounted for transient groundwater flow conditions. These dynamic flow conditions could have immense effects on the fate of microorganisms because of the variations in flow velocities, which are dominating microbial transport. In the current study, we used a variably saturated, three-dimensional groundwater flow and transport model coupled to a hydrodynamic surface water model at a riverbank filtration site. With this model, we estimated the required groundwater protection zones based on 8 log10 viral reductions and compared them to the 60 days travel time zones. The 8 log10 removal steps were based on a preliminary microbial risk assessment scheme for enteroviruses at the riverbank infiltration sites. The groundwater protection zones were estimated for a set of well withdrawal rates, river fluctuation ranges and frequencies, river gradients and bank slopes. The river flow dynamics and the morphology of the riverbed and banks are potentially important factors affecting microbial transport processes during riverbank filtration, which were previously not accounted for. Acknowledgments We would like to thank the Austrian Science Funds FWF for financial support as part of the Doctoral program DK-plus W1219-N22 on Water Resource Systems and the Vienna Waterworks (MA31) as part of the GWRS-Vienna project. We would also like to thank the MA39 (IFUM) for helping at the preliminary risk assessment.

  10. Wearing surface testing : Yukon River bridge.

    DOT National Transportation Integrated Search

    2012-12-01

    The Yukon River Bridge, also known as the E.L. Patton Bridge, carries the twolane Dalton Highway and the trans-Alaska oil pipeline across the Yukon River at a 6% : grade. It is 30 feet wide, with 6 spans; it was designed to withstand -60 degrees Fahr...

  11. 1. OBLIQUE VIEW, LOOKING NE FROM WEST BANK OF SUSQUEHANNA ...

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

    1. OBLIQUE VIEW, LOOKING NE FROM WEST BANK OF SUSQUEHANNA RIVER. PIERS FROM SOUTH PENNSYLVANIA RAILROAD AT LEFT, PHILADELPHIA & READING RAILROAD BRIDGE AT RIGHT. - Philadelphia & Reading Railroad, Susquehanna River Bridge, Spanning Susquehanna River, North of I-83 Bridge, Harrisburg, Dauphin County, PA

  12. STEEL ERECTION. View of downstream of bridge, looking southeast from ...

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

    STEEL ERECTION. View of downstream of bridge, looking southeast from confluence of Trinity and South Fork Trinity rivers. The old suspension bridge is in background - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  13. The demographic response of bank-dwelling beavers to flow regulation: A comparison on the Green and Yampa rivers

    USGS Publications Warehouse

    Breck, S.W.; Wilson, K.R.; Andersen, D.C.

    2001-01-01

    We assessed the effects of flow regulation on the demography of beavers (Castor canadensis) by comparing the density, home-range size, and body size of bank-dwelling beavers on two sixth-order alluvial river systems, the flow-regulated Green River and the free-flowing Yampa River, from 1997 to 2000. Flow regulation on the Green River has altered fluvial geomorphic processes, influencing the availability of willow and cottonwood, which, in turn, has influenced the demography of beavers. Beaver density was higher on the Green River (0.5–0.6 colonies per kilometre of river) than on the Yampa River (0.35 colonies per kilometre of river). Adult and subadult beavers on the Green River were in better condition, as indicated by larger body mass and tail size. There was no detectable difference in home-range size, though there were areas on the Yampa River that no beavers used. We attribute the improved habitat quality on the Green River to a greater availability of willow. We suggest that the sandy flats and sandbars that form during base flows and the ice cover that forms over winter on the Yampa River increase the energy expended by the beavers to obtain food and increase predation risk and thus lowers the availability of woody forage.

  14. Historical sediment budget and present-day catchment-shoreline coupling at Twofold Bay, southeastern Australia

    NASA Astrophysics Data System (ADS)

    Tamura, T.; Oliver, T.; Hudson, J.; Woodroffe, C. D.

    2017-12-01

    Considering projected impacts of sea-level rise in the 21st century on sandy shorelines, an understanding of long-term sediment budget for individual beaches or coastal compartments supports assessments of shoreline stability. We examined a low-lying coastal beach-ridge barrier in Twofold Bay using optically stimulated luminescence (OSL) dating , airborne LiDAR, sedimentological analysis and seismic data to assess changes in rates of sediment supply to this shoreline through time. Calculations of barrier volume, Twofold Bay bay-floor sediment volume and estimates of sediment delivery from a proximal river system provide a broad-scale assessment of past-sediment budget. Between ca. 7500 years ago and 1500 years ago, sources of sediment for shoreline progradation at Boydtown were bay-floor sediments either inherited or moved into the embayment during late-stage transgression. Progradation rate between ca. 7500-1500 years ago was 0.16 m/yr with subaerial barrier volume accumulating at 0.46 m3/m/yr. Between ca. 1500 years and present day, the Towamba River to the south has delivered additional sediment to the Boydtown shoreline more than doubling shoreline progradation rate to 0.65 m/yr and subaerial barrier accumulation has risen to 1.83 m3/m/yr. The delivery of fluvial sediment from the Towamba River was restricted to the past ca. 1500 years as prior to this, estuary infilling prevented floods delivering sediments to the bay. This recent historical coupling of river sand supply and shoreline progradation rate implies that anthropogenic modifications to the Towamba River catchment such as river damming, or climatic changes reducing rainfall or runoff, would negatively impact the Boydtown Beach shoreline. Conversely increased rainfall or deforestation may increase sediment discharge due to upstream erosion. The Boydtown shoreline within Twofold Bay may be able to maintain its current position in the coming century if fluvial sediment delivery continues. The fact that other shorelines within Twofold Bay are seemingly unaffected by the Towamba River, and most shorelines in southeast Australia receive minimal fluvial sediment input, further emphasises the need to consider nearshore sediment reserves in order to accurately determine sea-level rise impacts on sandy shorelines.

  15. Archeological Survey Along Sals Creek Ditch

    DTIC Science & Technology

    1991-12-18

    different projectile point types were produced (i.e., Rice Lobed, Big Sandy, Graham Cave, Kirk Corner Notched, White River Archaic, Hidden Valley Stemmed...Hardin Barbed, Searcy, Rice Lanceolate, Jakie Stemmed, and Johnson). Five Early Archaic points were recovered at 23SO496. No controlled excavations have...Archeological Survey, Fayetteville. Edrington, Mabel 1962 History of Mississippi County, Arkansas. Ocala Star Banner, Ocala, Florida. Elvas, Gentleman of

  16. 46 CFR 7.35 - Sandy Hook, NJ to Cape May, NJ.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Breakwater Light “2” to Shark River Inlet South Breakwater Light “1”. (b) A line drawn from Manasquan Inlet North Breakwater Light to Manasquan Inlet South Breakwater Light. (c) A line drawn along the submerged... Light “5”; thence along the submerged Barnegat Inlet South Breakwater to shore. (d) A line drawn from...

  17. 46 CFR 7.35 - Sandy Hook, NJ to Cape May, NJ.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Breakwater Light “2” to Shark River Inlet South Breakwater Light “1”. (b) A line drawn from Manasquan Inlet North Breakwater Light to Manasquan Inlet South Breakwater Light. (c) A line drawn along the submerged... Light “5”; thence along the submerged Barnegat Inlet South Breakwater to shore. (d) A line drawn from...

  18. 46 CFR 7.35 - Sandy Hook, NJ to Cape May, NJ.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Breakwater Light “2” to Shark River Inlet South Breakwater Light “1”. (b) A line drawn from Manasquan Inlet North Breakwater Light to Manasquan Inlet South Breakwater Light. (c) A line drawn along the submerged... Light “5”; thence along the submerged Barnegat Inlet South Breakwater to shore. (d) A line drawn from...

  19. 46 CFR 7.35 - Sandy Hook, NJ to Cape May, NJ.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Breakwater Light “2” to Shark River Inlet South Breakwater Light “1”. (b) A line drawn from Manasquan Inlet North Breakwater Light to Manasquan Inlet South Breakwater Light. (c) A line drawn along the submerged... Light “5”; thence along the submerged Barnegat Inlet South Breakwater to shore. (d) A line drawn from...

  20. Trophic network model of exposed sandy coast: Linking continental and marine water ecosystems

    NASA Astrophysics Data System (ADS)

    Razinkovas-Baziukas, Artūras; Morkūnė, Rasa; Bacevičius, Egidijus; Gasiūnaitė, Zita Rasuolė

    2017-08-01

    A macroscopic food web network for the exposed sandy coastal zone of the south-eastern Baltic Sea was reconstructed using ECOPATH software to assess the matter and energy balance in the ecosystem. The model incorporated 40 living functional groups representing the Baltic Sea coastal system of Lithuania during the first decade of 21rst century. The overall pedigree index of our model was relatively high (0.66) as much of the input data originated from the study area. The results indicate net heterotrophy of the coastal zone due to strong influences from the nearby river - lagoon system (Curonian Lagoon). The majority of fish species and waterbirds were present in the coastal system on a seasonal basis and their migrations contributed to heterotrophic conditions. Among fish, the freshwater stragglers possibly contribute to the reversal of flow in biomass and energy from the coastal zone to the river-lagoon system. Top predators such as breeding and wintering piscivorous waterbirds and large pike-perch were identified as keystone species. There was a clear negative balance for the biomass of small marine pelagic fishes such as smelt, sprat and Baltic herring which represent the main prey items in this system.

  1. 25. VIEW, LOOKING SOUTHWEST INSIDE TRANSFORMER ROOM, SHOWING TRANSFORMERS AND ...

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

    25. VIEW, LOOKING SOUTHWEST INSIDE TRANSFORMER ROOM, SHOWING TRANSFORMERS AND KNIFE SWITCHES - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  2. 26. VIEW, LOOKING NORTHWEST INSIDE TRANSFORMER ROOM, SHOWING OIL FILLED ...

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

    26. VIEW, LOOKING NORTHWEST INSIDE TRANSFORMER ROOM, SHOWING OIL- FILLED TRANSFORMER POTS - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  3. 11. DETAIL VIEW OF APPROACH TO INTAKE PIER FROM ACCESS ...

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

    11. DETAIL VIEW OF APPROACH TO INTAKE PIER FROM ACCESS BRIDGE, SHOWING DOOR TO INTERIOR GATE OPERATOR ROOM, LOOKING WEST. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  4. 17. "Concrete Bridge Over Salt River, Port Kenyon, Humboldt County, ...

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

    17. "Concrete Bridge Over Salt River, Port Kenyon, Humboldt County, California, A.J. Logan, County Surveyor, H.J. Brunnier, Consulting Engineer, March 7, 1919," showing plan of bars in top flange, elevation of girder reinforcement, plan of bars in bottom flange - Salt River Bridge, Spanning Salt River at Dillon Road, Ferndale, Humboldt County, CA

  5. 15. 'Concrete Bridge Over Salt River, Port Kenyon, Humboldt County, ...

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

    15. 'Concrete Bridge Over Salt River, Port Kenyon, Humboldt County, California, A.J. Logan, County Surveyor, H.J. Brunnier, Consulting Engineer, March 7, 1919,' showing general plan, plan of top chord, elevation of main girder, transverse section, plan section at deck level. - Salt River Bridge, Spanning Salt River at Dillon Road, Ferndale, Humboldt County, CA

  6. 18. "Concrete Bridge Over Salt River, Port Kenyon, Humboldt County, ...

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

    18. "Concrete Bridge Over Salt River, Port Kenyon, Humboldt County, California, A.J. Logan, County Surveyor, H.J. Brunnier, Consulting Engineer, March 7, 1919," showing elevation of center pier, elevation and plan of north and south abutments, sections of abutments, pier, and pier footings - Salt River Bridge, Spanning Salt River at Dillon Road, Ferndale, Humboldt County, CA

  7. 45Degree view of one (1) arm of the swing span ...

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

    45-Degree view of one (1) arm of the swing span bridge in the open position. The view shows the continuous bottom chord of the truss. The vertical post and diagonal web members that frame into this bottom chord are connected with single steel pins at each panel point (or joint). The timber track ties, supporting the track, span from truss to truss bottom chords (16' -0') and are supported thereby. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  8. 78 FR 40393 - Drawbridge Operation Regulations; Piscataqua River, Portsmouth, NH and Kittery, ME

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-05

    ... of the lift span. This deviation is necessary to allow New Hampshire Department of Transportation's... deviation to facilitate necessary alignment and adjustments to the recently installed main lift span. Under...

  9. Use of geological mapping tools to improve the hydraulic performance of SuDS.

    PubMed

    Bockhorn, Britta; Klint, Knud Erik Strøyberg; Jensen, Marina Bergen; Møller, Ingelise

    2015-01-01

    Most cities in Denmark are situated on low permeable clay rich deposits. These sediments are of glacial origin and range among the most heterogeneous, with hydraulic conductivities spanning several orders of magnitude. This heterogeneity has obvious consequences for the sizing of sustainable urban drainage systems (SuDS). We have tested methods to reveal geological heterogeneity at field scale to identify the most suitable sites for the placement of infiltration elements and to minimize their required size. We assessed the geological heterogeneity of a clay till plain in Eastern Jutland, Denmark measuring the shallow subsurface resistivity with a geoelectrical multi-electrode system. To confirm the resistivity data we conducted a spear auger mapping. The exposed sediments ranged from clay tills over sandy clay tills to sandy tills and correspond well to the geoelectrical data. To verify the value of geological information for placement of infiltration elements we carried out a number of infiltration tests on geologically different areas across the field, and we observed infiltration rates two times higher in the sandy till area than in the clay till area, thus demonstrating that the hydraulic performance of SuDS can be increased considerably and oversizing avoided if field geological heterogeneity is revealed before placing SuDS.

  10. OLD SUSPENSION BRIDGE. This view appears to be looking southeast, ...

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

    OLD SUSPENSION BRIDGE. This view appears to be looking southeast, at the downstream side of the suspension bridge, which was replaced by the South Fork Trinity River Bridge - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  11. 54. VIEW SHOWING THE PLACEMENT OF SPIDER WEB BRACING, SHOOFLY ...

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

    54. VIEW SHOWING THE PLACEMENT OF SPIDER WEB BRACING, SHOOFLY BRIDGE, January 1935 - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  12. 68. Photocopy of drawing (from print, Burlington Northern Engineering Office) ...

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

    68. Photocopy of drawing (from print, Burlington Northern Engineering Office) STRESS DIAGRAM - Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR

  13. 13. WEST END, LOOKING NE, PHILADELPHIA ZOO LION SCULPTURE IN ...

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

    13. WEST END, LOOKING NE, PHILADELPHIA ZOO LION SCULPTURE IN FOREGROUND. - Connecting Railway, Schuylkill River Bridge, Spanning Schuylkill River, north of Girard Avenue Bridge, Philadelphia, Philadelphia County, PA

  14. Modelling tools for managing Induced RiverBank Filtration MAR schemes

    NASA Astrophysics Data System (ADS)

    De Filippis, Giovanna; Barbagli, Alessio; Marchina, Chiara; Borsi, Iacopo; Mazzanti, Giorgio; Nardi, Marco; Vienken, Thomas; Bonari, Enrico; Rossetto, Rudy

    2017-04-01

    Induced RiverBank Filtration (IRBF) is a widely used technique in Managed Aquifer Recharge (MAR) schemes, when aquifers are hydraulically connected with surface water bodies, with proven positive effects on quality and quantity of groundwater. IRBF allows abstraction of a large volume of water, avoiding large decrease in groundwater heads. Moreover, thanks to the filtration process through the soil, the concentration of chemical species in surface water can be reduced, thus becoming an excellent resource for the production of drinking water. Within the FP7 MARSOL project (demonstrating Managed Aquifer Recharge as a SOLution to water scarcity and drought; http://www.marsol.eu/), the Sant'Alessio IRBF (Lucca, Italy) was used to demonstrate the feasibility and technical and economic benefits of managing IRBF schemes (Rossetto et al., 2015a). The Sant'Alessio IRBF along the Serchio river allows to abstract an overall amount of about 0.5 m3/s providing drinking water for 300000 people of the coastal Tuscany (mainly to the town of Lucca, Pisa and Livorno). The supplied water is made available by enhancing river bank infiltration into a high yield (10-2 m2/s transmissivity) sandy-gravelly aquifer by rising the river head and using ten vertical wells along the river embankment. A Decision Support System, consisting in connected measurements from an advanced monitoring network and modelling tools was set up to manage the IRBF. The modelling system is based on spatially distributed and physically based coupled ground-/surface-water flow and solute transport models integrated in the FREEWAT platform (developed within the H2020 FREEWAT project - FREE and Open Source Software Tools for WATer Resource Management; Rossetto et al., 2015b), an open source and public domain GIS-integrated modelling environment for the simulation of the hydrological cycle. The platform aims at improving water resource management by simplifying the application of EU water-related Directives and at facilitating the use of modeling environments and GIS tools for storage, management and visualization of large spatial datasets. The groundwater flow and solute transport model was built using FREEWAT, where MODFLOW-2005 and MT3DMS are integrated. The aquifer of the Sant'Alessio plain was discretized using square cells 100 m2 wide and two model layers, a silty-sandy superficial cover and the sandy-gravelly aquifer. Hydraulic connection with the Serchio river and exploitation of the aquifer through the Sant'Alessio well field were simulated. The aquifer model layer was further refined to simulate advection, dispersion, sorption and degradation of contaminants within the river. The objectives are: (i) estimating induced infiltration rates and travel times, (ii) optimizing groundwater exploitation in complex well field schemes, (iii) preventing pollution events, (iv) estimating time for remedial actions. Acknowledgements This paper is presented within the framework of the projects FP7 MARSOL and H2020 FREEWAT. The MARSOL project has received funding from the European Union's Seventh Framework Programme for Research, Technological Development and Demonstration under grant agreement no 619120. The FREEWAT project has received funding from the European Union's HORIZON 2020

  15. Simulation of natural flows in major river basins in Alabama

    USGS Publications Warehouse

    Hunt, Alexandria M.; García, Ana María

    2014-01-01

    The Office of Water Resources (OWR) in the Alabama Department of Economic and Community Affairs (ADECA) is charged with the assessment of the State’s water resources. This study developed a watershed model for the major river basins that are within Alabama or that cross Alabama’s borders, which serves as a planning tool for water-resource decisionmakers. The watershed model chosen to assess the natural amount of available water was the Precipitation-Runoff Modeling System (PRMS). Models were configured and calibrated for the following four river basins: Mobile, Gulf of Mexico, Middle Tennessee, and Chattahoochee. These models required calibrating unregulated U.S. Geological Survey (USGS) streamflow gaging stations to estimate natural flows, with emphases on low-flow calibration. The target calibration criteria required the errors be within the range of: (1) ±10 percent for total-streamflow volume, (2) ±10 percent for low-flow volume, (3) ±15 percent for high-flow volume, (4) ±30 percent for summer volume, and (5) above 0.5 for the correlation coefficient (R2). Seventy-one of the 90 calibration stations in the watershed models for the four major river basins within Alabama met the target calibration criteria. Variability in the model performance can be attributed to limitations in correctly representing certain hydrologic conditions that are characterized by some of the ecoregions in Alabama. Ecoregions consisting of predominantly clayey soils and (or) low topographic relief yield less successful calibration results, whereas ecoregions consisting of loamy and sandy soils and (or) high topographic relief yield more successful calibration results. Results indicate that the model does well in hilly regions with sandy soils because of rapid surface runoff and more direct interaction with subsurface flow.

  16. Identification of Sungai Batu Sediment using 2-D Resistivity Imaging and Seismic Refraction Methods for Ancient River Mapping at Kedah, Malaysia

    NASA Astrophysics Data System (ADS)

    Andika, F.; Saad, R.; Saidin, M. M.; Muztaza, N. M.; Amsir

    2018-04-01

    Sungai Batu is an earliest civilization in Southeast Asia with evidenced by the discovery of riverside jetty, iron smelting, and ritual monuments. The evidences can lead to prediction of buried river caused by geological and sedimentation process. This study was conducted to study sediment deposit characteristic and to map thickness of the sediments using 2-D resistivity imaging and seismic refraction for ancient river mapping. A total of thirty, 2-D resistivity and nine seismic survey lines were conducted at the study area. Four of the lines R1-R4 and S1-S4 were correlated and validated with existing on site boreholes BH1-BH4 to identify sediment type and thickness. The validated values applied to the remaining survey lines which no borehole record to map the subsurface of the study area. Based on the results, Sungai Batu area consist of clay with resistivity value of 6.6-25.9 Ω.m and velocity value of 716.9-1606.9 m/s; sandy clay with resistivity value of 6-265.1 Ω.m and velocity value of 1003.6-1901.4 m/s; while shale was identified with resistivity value of >668.6 Ω.m and velocity value of >2051.7 m/s. Boundary between clay/sandy clay with shale was identified with resistivity value of 314 Ω.m and velocity value of 1822 m/s. The integration of the 2-D resistivity and seismic refraction identified that the thickness of Sungai Batu sediment is 0-150 m and Sungai Batu ancient river was successfully map based on thickness of sediment which is >45 m.

  17. Applying a two-dimensional morphodynamic model to assess impacts to Chinook salmon spawning habitat from dam removal

    NASA Astrophysics Data System (ADS)

    Lee, A. A.; Crosato, A.; Omer, A. Y. A.; Bregoli, F.

    2017-12-01

    The need for accurate and robust predictive methods of assessing fluvial ecosystems is highlighted by the accelerating practice of dam removal. Dam removal can be a restorative measure, but the sudden release of impounded sediment and change in flow regime may negatively impact aquatic biota and their habitat. This study assesses the performance of a quasi-three-dimensional morphodynamic numerical model, coupled with habitat suitability indices, to predict short-term impacts to Chinook salmon (Oncorhynchus tshawytscha) spawning habitat from dam removal. The 2007 removal of Marmot Dam on the Sandy River (Oregon, U.S.A.) is used as a case study. Delft3D-FLOW is employed to simulate changes in river channel topography, sediment composition and hydrodynamic conditions for a 20-kilometer reach of the Sandy River. The transport of non-uniform sediment and three-dimensional flow effects are included in the model. Output parameters such as flow depth, velocity and substrate are processed to evaluate habitat quality in the year following the Marmot Dam removal. Impacts are evaluated across four life-stages of Chinook salmon. As a hindcast analysis, the morphodynamic model sufficiently reproduces the evolution of river morphology at the reach-scale while requiring only a low level of calibration. The model performs well in predicting impacts to fish passage, but carries more uncertainty for developing life stages. By coupling flow-sediment-biota interactions, this method shows strong potential for habitat assessment in unsteady and non-uniform environments. Computation time is a primary constraint, as it limits grid-cell resolution, modelling of suspended sediment and capacity to characterize the sediment grain size distribution. Research on the effects of suspended sediment on habitat quality is ongoing, and further research is recommended for modelling reservoir erosion processes numerically.

  18. 11. GIRDER PARTIAL ELEVATION AND SECTIONS, 80 FOOT THROUGH PLATE ...

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

    11. GIRDER PARTIAL ELEVATION AND SECTIONS, 80 FOOT THROUGH PLATE GIRDER SPAN. (Also includes a Marking Diagram and a schedule of parts.) American Bridge Company, Ambridge Plant No. 5, sheet no. 1, dated April 7, 1928, order no. F5073. For U.S. Steel Products Company, Pacific Coast Depot, order no. SF578. For Southern Pacific Company, order no. 8873-P-28746. Scale 1/4 inch to one foot. - Napa River Railroad Bridge, Spanning Napa River, east of Soscol Avenue, Napa, Napa County, CA

  19. 17. 'Southern Pacific Company Pacific System, 3 180'61/2' ...

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

    17. 'Southern Pacific Company - Pacific System, 3 - 180'-6-1/2' c. to c. end pins S. Tr. Thro. Spans, 10th, 11th and 13th Crossings of Sacramento River, also for 1 - 180'-6-1/2' c. to c. end pins S. Tr. Thro. Span, 8th Crossing Sacramento River, The Phoenixville Bridge Co., Phoenixville Pa., Apr. 9th, 1901.' - Southern Pacific Railroad Shasta Route, Bridge No. 310.58, Milepost 310.58, Sims, Shasta County, CA

  20. Challenges in estimating the health impact of Hurricane Sandy using macro-level flood data.

    NASA Astrophysics Data System (ADS)

    Lieberman-Cribbin, W.; Liu, B.; Schneider, S.; Schwartz, R.; Taioli, E.

    2016-12-01

    Background: Hurricane Sandy caused extensive physical and economic damage but the long-term health impacts are unknown. Flooding is a central component of hurricane exposure, influencing health through multiple pathways that unfold over months after flooding recedes. This study assesses concordance in Federal Emergency Management (FEMA) and self-reported flood exposure after Hurricane Sandy to elucidate discrepancies in flood exposure assessments. Methods: Three meter resolution New York State flood data was obtained from the FEMA Modeling Task Force Hurricane Sandy Impact Analysis. FEMA data was compared to self-reported flood data obtained through validated questionnaires from New York City and Long Island residents following Sandy. Flooding was defined as both dichotomous and continuous variables and analyses were performed in SAS v9.4 and ArcGIS 10.3.1. Results: There was a moderate agreement between FEMA and self-reported flooding (Kappa statistic 0.46) and continuous (Spearman's correlation coefficient 0.50) measures of flood exposure. Flooding was self-reported and recorded by FEMA in 23.6% of cases, while agreement between the two measures on no flooding was 51.1%. Flooding was self-reported but not recorded by FEMA in 8.5% of cases, while flooding was not self-reported but indicated by FEMA in 16.8% of cases. In this last instance, 84% of people (173/207; 83.6%) resided in an apartment (no flooding reported). Spatially, the most concordance resided in the interior of New York City / Long Island, while the greatest areas of discordance were concentrated in the Rockaway Peninsula and Long Beach, especially among those living in apartments. Conclusions: There were significant discrepancies between FEMA and self-reported flood data. While macro-level FEMA flood data is a relatively less expensive and faster way to provide exposure estimates spanning larger geographic areas affected by Hurricane Sandy than micro-level estimates from cohort studies, macro-level exposure estimates may underestimate the full flooding and health impacts of the hurricane. Future disaster preparedness efforts must integrate micro and macro-level flood exposures to produce the most accurate evaluation of health impacts in affected populations.

  1. Rare earth element compositions of core sediments from the shelf of the South Sea, Korea: Their controls and origins

    NASA Astrophysics Data System (ADS)

    Jung, Hoi-Soo; Lim, Dhongil; Choi, Jin-Yong; Yoo, Hae-Soo; Rho, Kyung-Chan; Lee, Hyun-Bok

    2012-10-01

    Rare earth elements (REEs) of bulk sediments and heavy mineral samples of core sediments from the South Sea shelf, Korea, were analyzed to determine the constraints on REE concentrations and distribution patterns as well as to investigate their potential applicability for discriminating sediment provenance. Bulk sediment REEs showed large variation in concentrations and distribution patterns primarily due to grain size and carbonate dilution effects, as well as due to an abundance of heavy minerals. In the fine sandy sediments (cores EZ02-15 and 19), in particular, heavy minerals (primarily monazite and titanite/sphene) largely influenced REE compositions. Upper continental crust-normalized REE patterns of these sand-dominated sediments are characterized by enriched light REEs (LREEs), because of inclusion of heavy minerals with very high concentrations in LREEs. Notably, such a strong LREE enrichment is also observed in Korean river sediments. So, a great care must be taken when using the REE concentrations and distribution patterns of sandy and coarse silty shelf sediments as a proxy for discriminating sediment provenance. In the fine-grained muddy sediments with low heavy mineral abundance, in contrast, REE fractionation ratios and their UCC-normalized patterns seem to be reliable proxies for assessing sediment provenance. The resultant sediment origin suggested a long lateral transportation of some fine-grained Chinese river sediments (probably the Changjiang River) to the South Sea of Korea across the shelf of the northern East China Sea.

  2. 76 FR 72309 - Drawbridge Operation Regulations; Chelsea River, Chelsea and East Boston, MA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-23

    ... installed new vertical lift bridge span will undergo testing for three weeks. This deviation requires a four hour advance notice for bridge openings during the lift span test period. DATES: This deviation is... facilities located upstream from the new bridge. The lift span at the new bridge will be operated by the...

  3. A loading study of older highway bridges in Virginia. Pt. 3, Concrete tee-beam bridge in Nelson County.

    DOT National Transportation Integrated Search

    1977-01-01

    A 40-foot clear span, standard reinforced tee-beam bridge over the Tye River in Nelson County was tested with a 23-ton, tandem axle test vehicle in July 1976. The test span was one of four identical spans making a total bridge length of 170 feet. Str...

  4. Distribution and conservation standing of West Virginia crayfishes

    USGS Publications Warehouse

    Loughman, Zachary J.; Welsh, Stuart A.

    2010-01-01

    The diversity of crayfishes in West Virginia represents a transition between the species-rich southern Appalachian faunas and the depauperate crayfish diversity in the northeastern United States. Currently, 22 described species occur in the state, of which 6 are given S1 status, and 3 are introduced species. One species, Orconectes limosus (Spinycheek Crayfish) is considered extirpated within the past decade. Imperiled species include Cambarus veteranus (Big Sandy Crayfish),Cambarus elkensis (Elk River Crayfish), Cambarus longulus (Atlantic Slope Crayfish), andCambarus nerterius (Greenbrier Cave Crayfish). Three species—O. virilis (Virile Crayfish),Orconectes rusticus (Rusty Crayfish), and Procambarus zonangulus (Southern White River Crawfish)—have introduced populations within the state. Procambarus acutus (White River Crawfish) occurs in bottomland forest along the Ohio River floodplain, and is considered native. Several undescribed taxa have been identified and currently are being described. A statewide survey was initiated in 2007 to document the current distribution and conservation status of crayfishes in West Virginia.

  5. 14. DETAIL VIEW OF STAIRS AND OVERLOOK AT SOUTH APPROACH, ...

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

    14. DETAIL VIEW OF STAIRS AND OVERLOOK AT SOUTH APPROACH, VIEW LOOKING NORTHEAST - Crooked River High Bridge, Spanning Crooked River Gorge at Dalles-California Highway, Terrebonne, Deschutes County, OR

  6. 64. Photocopy of drawing (from print, Burlington Northern Engineering Office, ...

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

    64. Photocopy of drawing (from print, Burlington Northern Engineering Office, Seattle) STRESS SHEET - Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR

  7. 17. DETAIL VIEW OF CUPOLA ATOP OPERATOR'S CABIN WHICH MOUNTS ...

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

    17. DETAIL VIEW OF CUPOLA ATOP OPERATOR'S CABIN WHICH MOUNTS SIGNAL HORNS, WEATHER VANE - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  8. 19. View of Clark Fork Vehicle Bridge facing north. Looking ...

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

    19. View of Clark Fork Vehicle Bridge facing north. Looking at north abutment and underside of northernmost span. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  9. Detail, starpattern balustrade of north span, from northwest, showing row ...

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

    Detail, star-pattern balustrade of north span, from northwest, showing row of four star-pattern railing slabs bracketed by simple molded concrete balusters - Horner Street Bridge, Horner Street over Stonycreek River, Johnstown, Cambria County, PA

  10. 12. View underside of bridge, showing concrete tee beam deck ...

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

    12. View underside of bridge, showing concrete tee beam deck spans supported by concrete piles, looking southwest - Colonel Alexander Scammell Memorial Bridge, Spanning Bellamy River at U.S. Route 4, Dover, Strafford County, NH

  11. 27. VIEW OF PIN CONNECTION AT L2, AND FLOOR BEAK ...

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

    27. VIEW OF PIN CONNECTION AT L2, AND FLOOR BEAK SUPPORT, EAST TRUSS, SPAN 1, LOOKING WEST - Emlenton Bridge, Spanning Allegheny River, Travel Route 38 (Legislative Route 75), Emlenton, Venango County, PA

  12. 16. VIEW OF PIN CONNECTION AT U1, AND BENT TOP ...

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

    16. VIEW OF PIN CONNECTION AT U1, AND BENT TOP LATERAL BAR, WEST TRUSS, SPAN 1, LOOKING WEST - Emlenton Bridge, Spanning Allegheny River, Travel Route 38 (Legislative Route 75), Emlenton, Venango County, PA

  13. Aftermath. The remains of the southwest end of the bridge ...

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

    Aftermath. The remains of the southwest end of the bridge lie next to the southwest pier. View is south-southeast from confluence of Trinity and South Fork Trinity Rivers - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  14. With water still in midflight, the northeast end of the ...

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

    With water still in mid-flight, the northeast end of the bridge (left) nears total collapse. View is to southeast from confluence of Trinity and South Fork Trinity Rivers - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  15. 75 FR 16006 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-31

    ... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., mile 59.4, at Sacramento, CA. The deviation is necessary to allow the bridge owner to make bridge... Sacramento River, at Sacramento, CA. The I Street Drawbridge navigation span provides 109 feet vertical...

  16. 76 FR 26181 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-06

    ... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... 59.0, at Sacramento, CA. The deviation is necessary to allow the community to participate in the Hope... Drawbridge, mile 59.0, over Sacramento River, at Sacramento, CA. The drawbridge navigation span provides a...

  17. 76 FR 11960 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-04

    ... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., mile 59.0, at Sacramento, CA. The deviation is necessary to allow the community to participate in the... Tower Drawbridge, mile 59.0, Sacramento River, at Sacramento, CA. The Tower Drawbridge navigation span...

  18. 76 FR 23188 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-26

    ... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., mile 59.0, at Sacramento, CA. The deviation is necessary to allow the community to participate in the... Tower Drawbridge, mile 59.0, Sacramento River, at Sacramento, CA. The Tower Drawbridge navigation span...

  19. 76 FR 79067 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-21

    ... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., mile 59.0, at Sacramento, CA. The deviation is necessary to allow community celebration of New Year's... Tower Drawbridge, mile 59.0, Sacramento River, at Sacramento, CA. The Tower Drawbridge navigation span...

  20. 38. Historic photograph, photographer unknown, c. 1944. VIEW SHOWING BURROS ...

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

    38. Historic photograph, photographer unknown, c. 1944. VIEW SHOWING BURROS (OR MULES) CROSSING BRIDGE, LOOKING NORTHEAST. - Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest), Cave Creek, Maricopa County, AZ

  1. 23. VIEW, LOOKING SOUTH, SHOWING GASOLINEPOWERED EMERGENCY GENERATOR, WITH MAIN ...

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

    23. VIEW, LOOKING SOUTH, SHOWING GASOLINE-POWERED EMERGENCY GENERATOR, WITH MAIN TRANSMISSION AT LEFT FOREGROUND - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  2. GENERAL 3/4 ELEVATION VIEW, LOOKING NORTHWEST, FROM NEW HAMPSHIRE SIDE ...

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

    GENERAL 3/4 ELEVATION VIEW, LOOKING NORTHWEST, FROM NEW HAMPSHIRE SIDE OF RIVER. - Cornish-Windsor Covered Bridge, Spanning Connecticut River between Cornish, NH, & Windsor, VT, Cornish City, Sullivan County, NH

  3. 6. VIEW OF BRIDGE, LOOKING DIRECTLY EAST THROUGH TRUSS FROM ...

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

    6. VIEW OF BRIDGE, LOOKING DIRECTLY EAST THROUGH TRUSS FROM SHOULDER OF ROAD - Shenandoah River Bridge, Spanning North fork of Shenandoah River on Virginia State Route 767, Quicksburg, Shenandoah County, VA

  4. 17. DETAIL OF SOUTH PORTAL, SHOWING "TREE OF LIFE" RAILING ...

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

    17. DETAIL OF SOUTH PORTAL, SHOWING "TREE OF LIFE" RAILING DETAIL AS WELL AS BUILDER'S PLATE. - Falls Bridge, Spanning Schuylkill River, connecting East & West River Drives, Philadelphia, Philadelphia County, PA

  5. 14. VIEW NORTHEAST OF UNDERSIDE OF PENNSYLVANIA PETIT TRUSS, SHOWING ...

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

    14. VIEW NORTHEAST OF UNDERSIDE OF PENNSYLVANIA PETIT TRUSS, SHOWING SLEEPERS, TRANSVERSE BEAMS, AND CONCRETE PIERS - New River Bridge, Spanning New River at State Route 623, Pembroke, Giles County, VA

  6. Aerial view showing US 93, Switchyards, Visitor Center Parking Garage, ...

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

    Aerial view showing US 93, Switchyards, Visitor Center Parking Garage, Hoover Dam, and Colorado River Canyon in Nevada - Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark County, NV

  7. 14. PROJECT PLAN, INTAKE PIER, RAW WATER CONDUITS, PUMPING STATION ...

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

    14. PROJECT PLAN, INTAKE PIER, RAW WATER CONDUITS, PUMPING STATION FORCE MAINS, TREATED WATER PIPELINES, AND FILTRATION PLANT, SHEET 1 OF 117, 1920. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  8. Potential linkage between sediment oxygen demand and pore water chemistry in weir-impounded rivers.

    PubMed

    Lee, Mi-Hee; Jung, Heon-Jae; Kim, Sung-Han; An, Sung-Uk; Choi, Jung Hyun; Lee, Hyo-Jin; Huh, In-Ae; Hur, Jin

    2018-04-01

    Due to recent weir construction on four major rivers in South Korea, sediment has accumulated in the river bottom near the weirs, which has in turn raised concerns over the quality of overlying water. In this study, the seasonal and spatial variations of sediment oxygen demand (SOD) and the influencing factors were explored using pore water chemistry for the weir-impounded rivers. Muddy and sandy sediment samples were taken from 24 different sites along the four major rivers in summer and autumn, 2016. The SOD was measured in a laboratory based on 10-hour incubation at in situ temperature. The measured pore water chemistry included the concentrations of dissolved organic carbon (DOC), total dissolved nitrogen (TDN), inorganic nitrogen (NH 3 -N, NO 3 -N, NO 2 -N), and phosphate phosphorous (PO 4 -P), and the optical properties from UV absorption spectra and fluorescence excitation-emission matrixes coupled with parallel factor analysis (EEM-PARAFAC). Significant differences in SOD values between muddy and sandy sediments were found only in summer (p=0.047). The higher SOD in summer versus autumn (p=0.015) was attributed to seasonal temperature differences. The higher NH 3 -N and the lower NO 3 -N of the pore water samples in summer versus autumn suggested that organic nitrogen decomposition via an ammonification and nitrification process could operate as an important factor for the SOD variations in summer and autumn, respectively. Principal component analysis revealed the mutual contributions of nitrogen-associated processes and the organic composition in pore water to increasing SOD levels. NH 3 -N in sediment pore water alone could be a good predictor for SOD. However, multiple regression analysis using NH 3 -N, fluorescence index and terrestrial humic-like components improved the estimation capability for SOD variations. Copyright © 2017 Elsevier B.V. All rights reserved.

  9. Correlation of coal beds, coal zones, and key stratigraphic units in the Pennsylvanian rocks of eastern Kentucky

    USGS Publications Warehouse

    Rice, Charles L.; Smith, J. Hiram

    1980-01-01

    The Pennsylvanian rocks of the eastern Kentucky coal field unlderlie an area of about 27,000 square kilometers (see index map). Largely because of the size and stratigraphic complexity of the area, Huddle and others (1963, p. 31) divided it into six coal reserve districts (unofficial), utilizing state and county lines as well as geologic features, drainage areas, and cola producing areas. This division is followed herein because, in general, each of these districts has a characteristic stratigraphic nomenclature, particularly as related to coal bed names. The six districts shown on the index mat, are the Princess, Licking River, Big Sandy, Hazard, Southwestern, and Upper Cumberland River; the Upper Cumberland River district has been divided into the Harlan and Middlesboro subdistricts. 

  10. The impact of Hurricane Sandy on the shoreface and inner shelf of Fire Island, New York: large bedform migration but limited erosion

    USGS Publications Warehouse

    Goff, John A.; Flood, Roger D.; Austin, James A.; Schwab, William C.; Christensen, Beth A.; Browne, Cassandra M.; Denny, Jane F.; Baldwin, Wayne E.

    2015-01-01

    We investigate the impact of superstorm Sandy on the lower shoreface and inner shelf offshore the barrier island system of Fire Island, NY using before-and-after surveys involving swath bathymetry, backscatter and CHIRP acoustic reflection data. As sea level rises over the long term, the shoreface and inner shelf are eroded as barrier islands migrate landward; large storms like Sandy are thought to be a primary driver of this largely evolutionary process. The “before” data were collected in 2011 by the U.S. Geological Survey as part of a long-term investigation of the Fire Island barrier system. The “after” data were collected in January, 2013, ~two months after the storm. Surprisingly, no widespread erosional event was observed. Rather, the primary impact of Sandy on the shoreface and inner shelf was to force migration of major bedforms (sand ridges and sorted bedforms) 10’s of meters WSW alongshore, decreasing in migration distance with increasing water depth. Although greater in rate, this migratory behavior is no different than observations made over the 15-year span prior to the 2011 survey. Stratigraphic observations of buried, offshore-thinning fluvial channels indicate that long-term erosion of older sediments is focused in water depths ranging from the base of the shoreface (~13–16 m) to ~21 m on the inner shelf, which is coincident with the range of depth over which sand ridges and sorted bedforms migrated in response to Sandy. We hypothesize that bedform migration regulates erosion over these water depths and controls the formation of a widely observed transgressive ravinement; focusing erosion of older material occurs at the base of the stoss (upcurrent) flank of the bedforms. Secondary storm impacts include the formation of ephemeral hummocky bedforms and the deposition of a mud event layer.

  11. 4. 3/4 VIEW OF ARCH OVER ROADWAY AT SOUTH END ...

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

    4. 3/4 VIEW OF ARCH OVER ROADWAY AT SOUTH END OF SPAN, LOOKING SW, SHOWING RIBBED ARCH CONSTRUCTION. - Philadelphia & Reading Railroad, Peacock's Lock Viaduct, Spanning Schuykill River at Reading Railroad, Reading, Berks County, PA

  12. 21. View of Clark Fork Vehicle Bridge facing west. Looking ...

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

    21. View of Clark Fork Vehicle Bridge facing west. Looking at bridge deck, guard rail, juncture of two bridge spans. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  13. 11. View of Clark Fork Vehicle Bridge facing northwest. Southernmost ...

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

    11. View of Clark Fork Vehicle Bridge facing northwest. Southernmost span. Plaque was originally located where striped traffic sign is posted. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  14. 26. VIEW OF PIN CONNECTION AT L2, SIDE VIEW, AND ...

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

    26. VIEW OF PIN CONNECTION AT L2, SIDE VIEW, AND FLOOR BEAN SUPPORT, EAST TRUSS, SPAN 1, LOOKING NORTH - Emlenton Bridge, Spanning Allegheny River, Travel Route 38 (Legislative Route 75), Emlenton, Venango County, PA

  15. 78 FR 9588 - Drawbridge Operation Regulations; Saugus River, Lynn and Revere, MA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-11

    ... scaffolding be attached to the bascule lift span to access work area. DATES: This deviation is effective from... facilitate rehabilitation of the bridge towers that requires scaffolding be attached to the bascule lift span...

  16. 34. View of pier 3, showing supporting main anchor arm ...

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

    34. View of pier 3, showing supporting main anchor arm and cantilever arm spans, as seen from shore near pier 4, looking north - Williamstown-Marietta Bridge, Spanning Ohio River between Williamstown & Marietta, Williamstown, Wood County, WV

  17. Environmental Impact Statement for Proposed Closure of Eaker Air Force Base, Arkansas

    DTIC Science & Technology

    1990-05-01

    alluvial floodplain of the Mississippi River . Quaternary deposits composed of clay, sandy clay, sand , and gravel occur to a depth of approximately 125...Protection Agency 1988 Bossier Parish , Louisiana : Mississippi County, Arkansas: Pulaski County, Arkansas: and Taylor County. Texas Air Quality Inventory...receiving bases: Malmstrom AFB, Montana; Barksdale AFB, Louisiana ; and Plattsburgh AFB, New York. Additional documents may be prepared 3 when the

  18. Continuum Statistics of the Bed Topography in a Sandy River

    NASA Astrophysics Data System (ADS)

    McElroy, B.; Jerolmack, D.; Mohrig, D.

    2005-12-01

    Temporal and spatial variabilities in the bed geometry of sandy rivers contain information about processes of sediment transport that has not been fully appreciated. This is primarily due to a disparity between the dynamic nature of the sediment-fluid interface and the relatively static methods of surveying bed elevation, e.g. single profiles or point measurements. High resolution topographic data is paramount to understanding the dynamic behavior of sandy beds. We present and analyze a data set collected on a 2cm x 2cm grid at 1 minute intervals and with a vertical precision of ~1mm. This was accomplished by using Lambert-Beer's Law for attenuation of light to transform low-altitude aerial photographs into digital elevation models. Forty successive models were generated for a 20 m by 30 m section of channel bottom of the N. Loup River, Nebraska. To calculate the average, whole bed translation rate, or celerity, cross-correlations between a reference bed topography and its proceeding configurations were determined. Time differences between models were related to the shift lengths that produced correlation maxima for each model pair. The result is a celerity of ~3.8cm/s with a correlation coefficient of 0.992. Bed topography also deforms while it translates, and this can be seen as a secular decrease of correlation maxima. The form of this decrease in correlation is exponential, and from it an interface half-life is defined. In this case, the bed had become extensively reorganized within ~40 minutes, the time necessary to translate the bed one wavelength of the dominant roughness element. Although the bed is continuously deforming, its roughness is statistically stationary. Essentially, a mean roughness is maintained as the bed creates new realizations of itself. The dynamic nature of the whole bed and similarly transient behavior of individual elements suggests the utility of a holistic approach to studying the feedback between bed topography, fluid flow, and sediment transport. Furthermore, it raises questions about the usefulness of detailed analysis of flow and transport over individual forms.

  19. Remote sensing research on fragile ecological environment in continental river basin

    NASA Astrophysics Data System (ADS)

    Wang, Ranghui; Peng, Ruyan; Zhang, Huizhi

    2003-07-01

    Based on some remote sensing data and software platform of image processing and analysis, the standard image for ecological thematic mapping is decided. Moreover, the vegetation type maps and land sandy desertification type maps are made. Relaying on differences of natural resources and ecological environment in Tarim River Basin, the assessment indicator system and ecological fragility index (EFI) of ecological environment are built up. The assessment results are very severely. That is, EFI is only 0.08 in Akesu River Basin, it belongs to slight fragility area. EFI of Yarkant River Basin and upper reaches of Tarim River Basin are 0.23 and 0.25 respectively, both of them belong to general fragility areas. Meanwhile, EFI of Hotan River Basin and middle reaches of Tarim River Basin are 0.32 and 0.49 respectively; they all belong to middle fragility areas. However, the fragility of the lower reaches of Tarim River Basin belongs to severe fragility area that the EFI is 0.87.The maladjustment among water with hot and land as well as salt are hindrance of energy transfer and material circulation and information transmission. It is also the main reason that caused ecological environment fragility.

  20. 76 FR 12 - Drawbridge Operation Regulations; New Haven Harbor, Quinnipiac and Mill Rivers, New Haven, CT

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-03

    ... to keep one lift span closed to facilitate scheduled bridge maintenance. DATES: This deviation is... temporary deviation the Ferry Street Bridge may keep one lift span in the closed position from 8 a.m. on... January 13, 2011. One lift span shall remain operational at all times. In accordance with 33 CFR 117.35(e...

  1. 77 FR 72737 - Drawbridge Operation Regulation; Mile 359.4, Missouri River, Kansas City, MO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-06

    ... counterweight cables that facilitate movement of the lift span. This deviation allows the bridge to remain in... movement of the lift span are replaced. The closure period will start at 7 a.m. on February 11, 2013, and continue through 11 p.m. on March 2, 2013. Once the counterweight cables are removed, the lift span will...

  2. 76 FR 76298 - Drawbridge Operation Regulation; Old Brazos River, Freeport, Brazoria County, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-07

    ... deviation allows the bridge to remain closed to navigation for four days to replace lift cables. DATES: This... deviation will allow the lift span of the bridge to remain in the closed-to-navigation position in order for.... The project involves the replacement of the old swing span with the current vertical lift span. Vessel...

  3. CANVAS FINISH TO REMOVE FLOAT MARKS. View is to the ...

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

    CANVAS FINISH TO REMOVE FLOAT MARKS. View is to the northwest of deck finishing operations - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  4. 20. DETAIL VIEW OF STONE WORK RAILING AT SCENIC OVERLOOK ...

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

    20. DETAIL VIEW OF STONE WORK RAILING AT SCENIC OVERLOOK AT PETER SKENE OGDEN MEMORIAL PARK - Crooked River High Bridge, Spanning Crooked River Gorge at Dalles-California Highway, Terrebonne, Deschutes County, OR

  5. 3. View of Clark Fork Vehicle Bridge facing southwest. Bridge ...

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

    3. View of Clark Fork Vehicle Bridge facing southwest. Bridge from north shore of Clark Fork River. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  6. 14. View to southwest. View through truss along centerline from ...

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

    14. View to southwest. View through truss along centerline from below deck. (65mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  7. 20. View to southeast. Aerial view of bridge in setting; ...

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

    20. View to southeast. Aerial view of bridge in setting; downstream side. (135mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  8. COUNTERWEIGHT FOOTINGS ON EAST SIDE. View is to the north ...

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

    COUNTERWEIGHT FOOTINGS ON EAST SIDE. View is to the north from the old suspension bridge - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  9. 13. View to northeast. View along centerline from Humboldt County ...

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

    13. View to northeast. View along centerline from Humboldt County side of bridge. (90mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  10. JIGGER STICK USED IN ERECTION. Shown on highline, direction of ...

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

    JIGGER STICK USED IN ERECTION. Shown on highline, direction of view is probably to the north - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  11. 12. View to southwest. View along centerline from Trinity County ...

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

    12. View to southwest. View along centerline from Trinity County side of bridge. (90mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  12. 11. View to southeast. More distant overview of bridge in ...

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

    11. View to southeast. More distant overview of bridge in setting; downstream side. (135mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  13. 11. BASRELIEF DECORATION, 'REGENERATION,' MURAL COMMEMORATING THE REBUILDING OF CHICAGO ...

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

    11. BAS-RELIEF DECORATION, 'REGENERATION,' MURAL COMMEMORATING THE REBUILDING OF CHICAGO AFTER THE GREAT FIRE - Chicago River Bascule Bridge, Michigan Avenue, Spanning Chicago River at North Michigan Avenue, Chicago, Cook County, IL

  14. 7. DETAIL VIEW UNDER BRIDGE OF CORRUGATED STEEL, BEAMS, RODS, ...

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

    7. DETAIL VIEW UNDER BRIDGE OF CORRUGATED STEEL, BEAMS, RODS, AND ABUTMENT - Price River Bridge, Spanning Price River, 760 North Street in Carbonville, 1 mile northwest of Price, Carbonville, Carbon County, UT

  15. 5. DETAIL VIEW OF SIDE STEEL RAIL, DECK, AND SHELF ...

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

    5. DETAIL VIEW OF SIDE STEEL RAIL, DECK, AND SHELF FROM SOUTHWEST CORNER - Price River Bridge, Spanning Price River, 760 North Street in Carbonville, 1 mile northwest of Price, Carbonville, Carbon County, UT

  16. 2. GENERAL 3/4 ELEVATION VIEW, LOOKING NORTHWEST, FROM NEW HAMPSHIRE ...

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

    2. GENERAL 3/4 ELEVATION VIEW, LOOKING NORTHWEST, FROM NEW HAMPSHIRE SIDE OF RIVER - Cornish-Windsor Covered Bridge, Spanning Connecticut River between Cornish, NH, & Windsor, VT, Cornish City, Sullivan County, NH

  17. 1. View from the northwest of the bridge's northwest (upstream) ...

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

    1. View from the northwest of the bridge's northwest (upstream) elevation - Big Cottonwood River Bridge No. 246, Spanning Big Cottonwood River at Cottonwood Street (City Road No. 165), New Ulm, Brown County, MN

  18. 2. View from the north of the bridge's northwest (upstream) ...

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

    2. View from the north of the bridge's northwest (upstream) elevation - Big Cottonwood River Bridge No. 246, Spanning Big Cottonwood River at Cottonwood Street (City Road No. 165), New Ulm, Brown County, MN

  19. 5. View from the east of the bridge's southeast (downstream) ...

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

    5. View from the east of the bridge's southeast (downstream) elevation - Big Cottonwood River Bridge No. 246, Spanning Big Cottonwood River at Cottonwood Street (City Road No. 165), New Ulm, Brown County, MN

  20. 28. 'TOWER DESIGN NO. 11, ADAPTED FROM NO. 9,' drawn ...

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

    28. 'TOWER DESIGN NO. 11, ADAPTED FROM NO. 9,' drawn by project architect Alfred Eichler, undated, ca. 1934. - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  1. Closeup view under the track at the center/pivot pier showing ...

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

    Close-up view under the track at the center/pivot pier showing the system of distributing girders which transfer all the load of the swing span, both dead, live load, wind, etc., onto the circular drum, thence to the rim bearing 40 20-inch diameter wheels. Note: The track timber ties supported on the bottom truss chord of the swing span truss. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  2. With deck removed and critical members severed, the bridge begins ...

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

    With deck removed and critical members severed, the bridge begins to succumb to tractors, pulling cables attached to its downstream side. View is to the southeast from confluence of Trinity and South Fork Trinity Rivers - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  3. Spray and dust hang in the air, as the demolition ...

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

    Spray and dust hang in the air, as the demolition is completed. Only the southeast pier remains standing at right. View is to southeast from confluence of Trinity and South Fork Trinity Rivers - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  4. Relating stream microbial ecology to land-use in the Choptank River Watershed

    USDA-ARS?s Scientific Manuscript database

    The Choptank River is an estuary and tributary on the Eastern Shore of the Chesapeake Bay whose mouth is a tidal embayment that spans 2057 km2. Approximately 60% of land use in the Choptank River Watershed is agricultural, with large acreages of corn (Zea mays), soybean (Glycine max), wheat (Tritic...

  5. 77 FR 53141 - Drawbridge Operation Regulation; Columbia River, Vancouver, WA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-31

    ... lift-spans. This deviation allows height-restricted lifts which will reduce the vertical clearance... which cross the Columbia River at mile 106.5 only be required to lift to a reduced height of 130 feet above Columbia River Datum for a 30 day period. The height restricted lifts are necessary to facilitate...

  6. 77 FR 12475 - Drawbridge Operation Regulations; Cape Fear River, Wilmington, NC

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-01

    ... Operation Regulations; Cape Fear River, Wilmington, NC AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... deviation from the regulations governing the operation of the Cape Fear Memorial Bridge, across the Cape Fear River, mile 26.8, at Wilmington, NC. The deviation restricts the operation of the draw span to...

  7. 76 FR 53342 - Drawbridge Operation Regulations; Cape Fear River, Wilmington, NC

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-26

    ... Operation Regulations; Cape Fear River, Wilmington, NC AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... deviation from the regulations governing the operation of the Cape Fear Memorial Bridge, at mile 26.8, over Cape Fear River, at Wilmington, NC. The deviation restricts the operation of the draw span to...

  8. 76 FR 39298 - Drawbridge Operation Regulation; Christina River, Wilmington, DE

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-06

    ... Operation Regulation; Christina River, Wilmington, DE AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... River, at mile 2.8, in Wilmington, DE. The deviation restricts the operation of the draw span in order... Wilmington, DE has a vertical clearance in the closed position to vessels of 13 feet above mean high water...

  9. 76 FR 39773 - Drawbridge Operation Regulation; Christina River, Wilmington, DE

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-07

    ... Operation Regulation; Christina River, Wilmington, DE AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., across the Christina River in Wilmington, DE. The deviation restricts the operation of the draw span in... Wilmington, DE has a vertical clearance in the closed position to vessels of 14 feet above mean high water...

  10. 76 FR 81826 - Drawbridge Operation Regulation; Pocomoke River, Pocomoke City, MD

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-29

    ... Operation Regulation; Pocomoke River, Pocomoke City, MD AGENCY: Coast Guard, DHS. ACTION: Notice of... River, mile 15.6, at Pocomoke City, MD. The deviation restricts the operation of the draw span to... City, MD, has a vertical clearance in the closed position of three feet above mean high water. Under...

  11. DETAIL OF EAST (CANADIAN) CANTILEVER AND ANCHOR ARMS OF MAIN ...

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

    DETAIL OF EAST (CANADIAN) CANTILEVER AND ANCHOR ARMS OF MAIN SPAN, SHOWING PIER C. VIEW TO NORTH. - Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian Route 402, Port Huron, St. Clair County, MI

  12. 13. VIEW OF CAUSEWAY, LOOKING EAST, PROFILING DETAILS OF RIGID ...

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

    13. VIEW OF CAUSEWAY, LOOKING EAST, PROFILING DETAILS OF RIGID FRAME SPAN OVER CANAL STREET, AND SHOWING STEEL RIBS AND FLOOR BEANS ENCASED IN CONCRETE - Notre Dame Bridge, Spanning Merrimack River on Bridge Street, Manchester, Hillsborough County, NH

  13. 13. VIEW OF TOP LATERAL STRUT AND BRACING, U10 IN ...

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

    13. VIEW OF TOP LATERAL STRUT AND BRACING, U10 IN TOP FOREGROUND, U9 IN LOWER CENTER, SPAN 2, LOOKING NORTH - Emlenton Bridge, Spanning Allegheny River, Travel Route 38 (Legislative Route 75), Emlenton, Venango County, PA

  14. 26. Typical top chord, vertical lattice, diagonal bracing and bottom ...

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

    26. Typical top chord, vertical lattice, diagonal bracing and bottom chord assembly. View is of south side of center panels of 4th span. - Cleves Bridge, Spanning Great Miami River on U.S. Highway 50, Cleves, Hamilton County, OH

  15. Depositional and erosional dynamics of emergent sandbars: a case study of the Platte River, Eastern Nebraska.

    NASA Astrophysics Data System (ADS)

    Alexander, J. S.; Murr, M. L.; McElroy, B. J.

    2016-12-01

    Macroform sandbars (sandbars) are ubiquitous depositional features of sandy, braided rives. Sandbars formed during annual floods stall and emerge during flow recession, splitting flow, and producing the characteristic braiding pattern. Emergent sandbars are crucial components of riverine ecosystems, forming the foundation of the floodplain/braidplain, providing nesting, brooding, and foraging habitat for migratory and endemic animals, and shallow water aquatic habitat along their periphery. In the United States, substantial resources are being expended to recover and expand so-called emergent sandbar habitat (ESH) in large rivers of the Great Plains, where the natural extent and dynamism of ESH has been degraded due to construction of main-channel dams, navigation channels, and/or disruption of the natural hydrologic and sediment regimes. These programs are ultimately aimed at recovery and protection of populations of Federal and State-listed migratory bird species. Despite the importance of ESH, relatively little empirical information describing the natural temporal and spatial dynamics of sandbar geometries, erosion rates, and depositional controls is available for integrating into ecological and river management models. From 2011 to 2014, we monitored the geometry and fate of large emergent sandbars along 160 km of the sandy, braided Platte River in eastern Nebraska, a segment which retains a mostly natural sediment and hydrologic regime. We show that important descriptors of ESH quality, such as sandbar height, scale linearly with increases in flow stage, but the difference in elevation between sandbar height and formative stage also increases with increasing flow stage. Thus, the flood-hazard of natural sandbars may be much higher than current theory suggests. Our monitoring data indicates that emergent sandbars tend to erode within a year after deposition, and that the rate of erosion scales linearly with discharge. Finally, in agreement with previous work, we show that large emergent sandbars tend to form in wider reaches of river, but channel width alone is a poor predictor of the spatial extent of ESH. While our data are not general, we suggest that similar empirical models could be used to plan flow release schedules to recover and/or maintain ESH extent in altered rivers.

  16. PIER 2. View is to the northeast, looking from Pier ...

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

    PIER 2. View is to the northeast, looking from Pier 1 toward Pier 2 from beneath completed bridge - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  17. 3. View to southwest. Oblique view of downstream side of ...

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

    3. View to southwest. Oblique view of downstream side of bridge and west pier. (135mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  18. 2. View to east. Oblique view of downstream side of ...

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

    2. View to east. Oblique view of downstream side of bridge and east pier. (135mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  19. 9. View to northeast. Oblique view of upstream side of ...

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

    9. View to northeast. Oblique view of upstream side of bridge from approximately deck level. (90mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  20. PLACING TOP CHORD CENTER PANEL. View to the northwest from ...

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

    PLACING TOP CHORD CENTER PANEL. View to the northwest from the old suspension bridge. Chord members in place - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  1. 17. View to west. Detail, connection point L2 (see plans), ...

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

    17. View to west. Detail, connection point L2 (see plans), from below deck. (135mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  2. 6. BRIDGE LOOKING SOUTH FROM CROWN POINT STATE PARK SHOWING ...

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

    6. BRIDGE LOOKING SOUTH FROM CROWN POINT STATE PARK SHOWING SURROUNDING DEVELOPMENT FROM CONSTRUCTION OF DAM - Columbia River Bridge at Grand Coulee Dam, Spanning Columbia River at State Route 155, Coulee Dam, Okanogan County, WA

  3. 10. BRIDGE IN CONTEXT OF DAM, THIRD POWER HOUSE IN ...

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

    10. BRIDGE IN CONTEXT OF DAM, THIRD POWER HOUSE IN FOREGROUND, LOOKING NORTH BY 360 DEGREES - Columbia River Bridge at Grand Coulee Dam, Spanning Columbia River at State Route 155, Coulee Dam, Okanogan County, WA

  4. 11. Detail of sway braces, struts and top lateral braces' ...

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

    11. Detail of sway braces, struts and top lateral braces' view to north-northwest - Milk River Bridge, Spanning Milk River approximately one mile north of Tampico on Tampico North Road, Tampico, Valley County, MT

  5. 52. Photocopy of photograph (Plate XXI, Modjeski report) WILLAMETTE BRIDGE, ...

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

    52. Photocopy of photograph (Plate XXI, Modjeski report) WILLAMETTE BRIDGE, DIAGRAM SHOWING RATE OF PROGRESS IN SINKING CAISSONS - Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR

  6. 22. PIN CONNECTION AT JUNCTURE OF INTERMEDIATE VERTICAL WITH BOTTOM ...

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

    22. PIN CONNECTION AT JUNCTURE OF INTERMEDIATE VERTICAL WITH BOTTOM CHORD ON PENNSYLVANIA PETIT TRUSS. HYDRAULICALLY FORGED EYES ON ROLLED STOCK. - New River Bridge, Spanning New River at State Route 623, Pembroke, Giles County, VA

  7. 6. VIEW FACING EAST ALONG NORTH FACE OF BRIDGE AT ...

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

    6. VIEW FACING EAST ALONG NORTH FACE OF BRIDGE AT CONSTRUCTION DETAILS OF WOOD RAILINGS AND STONE ABUTMENTS. - South Fork Tuolumne River Bridge, Spanning South Fork Tuolumne River on Tioga Road, Mather, Tuolumne County, CA

  8. 5. VIEW EAST ACROSS BRIDGE SHOWING RAILING DETAILS AND WATERFALLS ...

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

    5. VIEW EAST ACROSS BRIDGE SHOWING RAILING DETAILS AND WATERFALLS OF THE SOUTH FORK OF THE TUOLUMNE. - South Fork Tuolumne River Bridge, Spanning South Fork Tuolumne River on Tioga Road, Mather, Tuolumne County, CA

  9. Detail of middle panel at pivot pier and above the ...

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

    Detail of middle panel at pivot pier and above the two (2) center supports. The middle panel chords (not shown) were made strong enough to provide for the full bending moment with the span open and arms swinging. The middle posts support the operator's house. When closed, the bridge acts as two (2) separate simple spans, except a small amount of negative bending is accommodated due to a continuous condition. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  10. 6. View looking toward northwest from southern oiler's platform, showing ...

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

    6. View looking toward northwest from southern oiler's platform, showing swing-span draw, masonry rest pier with gatehouse and ornamental railing (Nov. 25, 1988) - University Heights Bridge, Spanning Harlem River at 207th Street & West Harlem Road, New York County, NY

  11. 3. Photocopy of original drawing belonging to the Pittsburgh Department ...

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

    3. Photocopy of original drawing belonging to the Pittsburgh Department of Public Works, (n.d.). DRAWING NO. 1963: STRESS AND SECTION SHEET FOR 531' STEEL SPANS. - North Side Point Bridge, Spanning Allegheny River at Point of Pittsburgh, Pittsburgh, Allegheny County, PA

  12. 38. Photographic copy of original construction plan (Wabasha Street Bridge, ...

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

    38. Photographic copy of original construction plan (Wabasha Street Bridge, Detail of South Cantilever Arm, 1888); web details of cantilever arm connecting second pier to third span - Wabasha Street Bridge, Spanning Mississippi River at Wabasha Street, Saint Paul, Ramsey County, MN

  13. 28. REPRESENTATIVE CENTER WEDGE. BALANCE WHEELS ON TRACK, WITH RACK ...

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

    28. REPRESENTATIVE CENTER WEDGE. BALANCE WHEELS ON TRACK, WITH RACK TO OUTSIDE, SHOWN TO RIGHT OF THE WEDGE. PHOTO TAKEN AT SOUTH SWING SPAN. - George P. Coleman Memorial Bridge, Spanning York River at U.S. Route 17, Yorktown, York County, VA

  14. Sediment Transport and Slope Stability of Ship Shoal Borrow Areas for Coastal Restoration of Louisiana

    NASA Astrophysics Data System (ADS)

    Liu, H.; Xu, K.; Bentley, S. J.; Li, C.; Miner, M. D.; Wilson, C.; Xue, Z.

    2017-12-01

    Sandy barrier islands along Louisiana coast are degrading rapidly due to both natural and anthropogenic factors. Ship Shoal is one of the largest offshore sand resources, and has been used as a borrow area for Caminada Headland Restoration Project. Our knowledge of sediment transport and infilling processes in this new sandy and dynamic borrow area is rather limited. High resolution sub-bottom seismic data, side scan sonar images, multi-beam bathymetry and laser sediment grain size data were used to study seafloor morphological evolution and pit wall stability in response to both physical and geological processes. The multi-beam bathymetry and seismic profiling inside the pit showed that disequilibrium conditions led to rapid infilling in the pits at the beginning, but this process slowed down after the pit slope became stable and topography became smooth. We hypothesize that the erosion of the adjacent seabed sediment by energetic waves and longshore currents, the supply of suspended sediment from the rivers, and the erodible materials produced by local mass wasting on pit walls are three main types of infilling sediments. Compared with mud-capped dredge pits, this sandy dredge pit seems to have more gentle slopes on pit walls, which might be controlled by the angle of repose. Infilling sediment seems to be dominantly sandy, with some mud patches on bathymetric depressions. This study helps us better understand the impacts of mining sediment for coastal restoration and improves sand resource management efforts.

  15. Massive sediment bypassing on the lower shoreface offshore of a wide tidal inlet: Cat Island Pass, Louisiana

    USGS Publications Warehouse

    Jaffe, B.E.; List, J.H.; Sallenger, A.H.

    1997-01-01

    Analysis of a series of historical bathymetric and shoreline surveys along the Louisiana coast west of the Mississippi River mouth detected a large area of deposition in water depths of 2.0–8.5 m offshore of a 9-km-wide tidal inlet, the Cat Island Pass/Wine Island Pass system. A 59.9 · 106 m3 sandy deposit formed from the 1930s–1980s, spanning 27 km in the alongshore direction, delineating the transport pathway for sediment bypassing offshore of the inlet on the shoreface. Bypassing connected the shorefaces of two barrier island systems, the Isles Dernieres and the Bayou Lafourche.The processes responsible for formation of this deposit are not well understood, but sediment-transport modeling suggests that sediment is transported primarily by wind-driven coastal currents during large storms and hurricanes. Deposition appears to be related to changes in shoreline orientation, closing of transport pathways into a large bay to the east and the presence of tidal inlets. This newly documented type of bypassing, an offshore bypassing of the inlet system, naturally nourished the immediate downdrift area, the eastern Isles Dernieres, where shoreface and shoreline erosion rates are about half of pre-bypassing rates. Erosion rates remained the same farther downdrift, where bypassing has not yet reached. As this offshore bypassing continues, the destruction of the Isles Dernieres will be slowed.

  16. Detailed view of one (1) end of the swing span, ...

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

    Detailed view of one (1) end of the swing span, supported on a rest pier, with the span in the closed position and in the train operational mode. Note the end truss bearing where a steel wedge is in the driven position to complete the end bearing arrangement. The wedges are power-driven through the machinery crank arms shown, thus forcing the ends of the swing span truss upward. Note: The top of the old stone pies has been encased with a concrete collar to hold stone masonry together and strengthen truss bearing points. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  17. Abundance and reproduction of toads (Bufo) along a regulated river in the southwestern United States: Importance of flooding in riparian ecosystems

    Treesearch

    H. L. Bateman; M. J. Harner; A. Chung-MacCoubrey

    2008-01-01

    Abundance and size of toads (Bufo woodhousii and B. cognatus) were related to precipitation, river flow, and groundwater over 7 years along the Middle Rio Grande, a regulated river in the semi-arid southwestern United States. Toads were monitored in riparian areas at 12 sites spanning 140 km of river during summers 2000­2006....

  18. 16. VIEW SOUTHWEST OF CONCRETE PIER SUPPORTING CAMELBACK AND PENNSYLVANIA ...

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

    16. VIEW SOUTHWEST OF CONCRETE PIER SUPPORTING CAMELBACK AND PENNSYLVANIA PETIT TRUSSES. ORIGINAL PIER LYING IN FOREGROUND DESTROYED BY 1915 FLOOD DURING CONSTRUCTION - New River Bridge, Spanning New River at State Route 623, Pembroke, Giles County, VA

  19. 15. View to northeast. View along centerline from below deck; ...

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

    15. View to northeast. View along centerline from below deck; detail of bent and floor beams. (65mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  20. STEEL ERECTION. View of upstream side of bridge, looking north ...

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

    STEEL ERECTION. View of upstream side of bridge, looking north from the old suspension bridge at unjoined cantilever arms - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  1. 16. View to southsouthwest. Detail, connection point U1 (see plans), ...

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

    16. View to south-southwest. Detail, connection point U1 (see plans), from below deck. (135mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  2. LOWER CHORD ERECTION. View is to northnorthwest from the old ...

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

    LOWER CHORD ERECTION. View is to north-northwest from the old suspension bridge. Chord members suspended from jigger stick - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  3. STEEL ERECTION. View is to the north from the old ...

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

    STEEL ERECTION. View is to the north from the old suspension bridge, looking at upstream side of new bridge - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  4. 4. View to westsouthwest. Oblique view of upstream side of ...

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

    4. View to west-southwest. Oblique view of upstream side of bridge from approximately deck level. (90mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  5. 77 FR 44142 - Drawbridge Operation Regulation; Neches River, Beaumont, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-27

    ... schedule that governs the Kansas City Southern vertical lift span bridge across the Neches River, mile 19.5, at Beaumont, Texas. The deviation is necessary to replace south vertical lift joints on the bridge... has [[Page 44143

  6. 1. Photographic copy of the original construction drawing, 1925, by ...

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

    1. Photographic copy of the original construction drawing, 1925, by Missouri State Highway Department. General elevation and dimensions of arch ring - Meramec River Bridge, Spanning Meramec River at Missouri State Route 19, Steelville, Crawford County, MO

  7. 9. DETAIL VIEW OF ROLLING EXPANSION JOINT, NORTHEAST BASE OF ...

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

    9. DETAIL VIEW OF ROLLING EXPANSION JOINT, NORTHEAST BASE OF SECOND CLOSED SPANDREL ARCH AT JUNCTION OF OPEN SPANDREL ARCH, LOOKING EAST - Virgin River Bridge, Spanning Virgin River on State Highway 9, Hurricane, Washington County, UT

  8. [Characteristics of soil nematode community along an age sequence of sandy desert soil cultivation in a marginal oasis of middle reaches of Heihe River].

    PubMed

    Wang, Xue-Feng; Su, Yong-Zhong; Yang, Rong

    2010-08-01

    This paper studied the characteristics of soil nematode community following the conversion of native sandy desert soil to irrigated farmland in a marginal oasis of the middle reaches of Heihe River basin, aimed to approach the bioindicating function of soil nematodes in soil evolution process. A total of 27921 soil nematode individuals were captured, belonging to 25 families and 34 genera. The total number of nematodes increased gradually with increasing age of cultivation. At all sampling sites, bacterivores and plant parasites were the dominant trophic groups, and made up the main parts of nematode community in oasis farmland. Through the analysis of the evenness index (J) and dominance index (lambda) of nematode community, the ecosystems were found to be fragile for the farmlands having cultivated for 0, 10, and > 50 years. The maturity index MI2-5 and MMI decreased with increasing cultivation age, suggesting that the practice of agricultural use enhanced the disturbance on farmland. The soil properties changed significantly after 10 years of cultivation, which was at a significant change stage for the structure stability of soil ecosystems. The characteristics of soil nematode community could be used as the bioindicator of soil evolution following the conversion of native desert soil to irrigated farmland.

  9. 11. VIEW OF BRIDGE, LOOKING WEST FROM THE EAST MAIN ...

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

    11. VIEW OF BRIDGE, LOOKING WEST FROM THE EAST MAIN SUSPENSION CABLE ANCHORAGE OVER THE EAST TOWER. THE ORIGINAL WOOD TOWER IS ENCASED IN CONCRETE AND RUBBLE MASONRY. THE VERDE RIVER FLOWS FROM RIGHT TO LEFT. FebruAry 1987 - Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest), Cave Creek, Maricopa County, AZ

  10. 77 FR 21436 - Safety Zone, East River, Brooklyn Bridge Scaffolding Repair, Brooklyn, NY

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-10

    ...-AA00 Safety Zone, East River, Brooklyn Bridge Scaffolding Repair, Brooklyn, NY AGENCY: Coast Guard, DHS... navigable waters of the East River, in the vicinity of the Brooklyn Bridge. This action is necessary to... and remove the damaged scaffolding under the eastern span of the bridge. This rule is intended to...

  11. Instrumentation of the Maumee River Crossing.

    DOT National Transportation Integrated Search

    2012-03-01

    This project has focused on the instrumentation, monitoring and testing of the main span unit of the VGCS, one of Ohio's first long-span, cable-stayed bridges and one of only a few dozen such bridges in service in the nation. This effort looked at fi...

  12. 27. DETAIL OF DECK JOINT BETWEEN APPROACH SPAN No. 3 ...

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

    27. DETAIL OF DECK JOINT BETWEEN APPROACH SPAN No. 3 AND NORTH CANTILEVER ANCHOR ARM AND RESPECTIVE BEARINGS AT PIER No. 3, LOOKING EAST - Jackson's Ferry Bridge, Route 52 over New River, 6.3 miles south of Route 94, Austinville, Wythe County, VA

  13. Instrumentation of the Maumee River Crossing : executive summary report.

    DOT National Transportation Integrated Search

    2012-03-01

    This project has focused on the instrumentation, monitoring and testing of the main span unit of the : VGCS, one of Ohios first long-span, cable-stayed bridges and one of only a few dozen such bridges in : service in the nation. This effort looked...

  14. Discovery of ammocrypta clara (western sand darter) in the Upper Ohio River of West Virginia

    USGS Publications Warehouse

    Cincotta, Dan A.; Welsh, Stuart A.

    2010-01-01

    Ammocrypta clara Jordan and Meek (western sand darter) occurs primarily in the western portions of Mississippi River system, but also has been reported from a Lake Michigan drainage and a few eastern Texas Gulf Slope rivers. Additional range records depict a semi-disjunct distribution within the Ohio River drainage, including collections from Wabash River in Indiana, the Cumberland, Green, Kentucky and Big Sandy rivers of Kentucky, and the upper Tennessee River in Tennessee and Virginia. This paper documents the occurrence of A. clara from the upper Ohio River drainage within the lower Elk River, West Virginia, based on collections from 1986, 1991, 1995, 2005 and 2006. The Elk River population, consistent with those of other Ohio River drainages, has slightly higher counts for numbers of dorsal-fin rays, scales below lateral line and lateral line scales when compared to data from populations outside of the Ohio River drainage. Modal counts of meristic characters are similar among populations, except for higher modal counts of lateral line scales in the Ohio River population. The discovery of the Elk River population extends the range distribution of A. clara in the Eastern Highlands region, documents wide distributional overlap and additional sympatry with its sister species,A. pellucida (eastern sand darter), and softens support for an east-west Central Highlands vicariance hypothesis for the present distribution of A. clara and A. pellucida.

  15. 15. VIEW SOUTH OF CONCRETE PIER SUPPORTING CAMELBACK AND PENNSYLVANIA ...

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

    15. VIEW SOUTH OF CONCRETE PIER SUPPORTING CAMELBACK AND PENNSYLVANIA PETIT TRUSSES. ORIGINAL PIER LYING IN FOREGROUND DESTROYED BY 1915 FLOOD DURING ORIGINAL CONSTRUCTION - New River Bridge, Spanning New River at State Route 623, Pembroke, Giles County, VA

  16. PLACING DIAGONALS IN CENTER PANEL. View is northnorthwest from the ...

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

    PLACING DIAGONALS IN CENTER PANEL. View is north-northwest from the old suspension bridge, looking at upstream side of new bridge - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  17. MOVING SHAFT FORMS FROM PIER #2 TO PIER #1. View ...

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

    MOVING SHAFT FORMS FROM PIER #2 TO PIER #1. View is to the northeast, with shaft forms being moved by highline - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  18. 4. View of bridge deck from northeast approach (bridge deck ...

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

    4. View of bridge deck from northeast approach (bridge deck from southwest approach is virtually identical - Big Cottonwood River Bridge No. 246, Spanning Big Cottonwood River at Cottonwood Street (City Road No. 165), New Ulm, Brown County, MN

  19. 10. Detail, dedication plaque on the bridge's northeast end (plaque ...

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

    10. Detail, dedication plaque on the bridge's northeast end (plaque on southwest end of bridge is identical - Big Cottonwood River Bridge No. 246, Spanning Big Cottonwood River at Cottonwood Street (City Road No. 165), New Ulm, Brown County, MN

  20. 12. VIEW, LOOKING NORTHWEST, ALONG CENTERLINE FROM NORTH CANTILEVER TOWER ...

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

    12. VIEW, LOOKING NORTHWEST, ALONG CENTERLINE FROM NORTH CANTILEVER TOWER TOWARD SOUTH PORTAL. As with previous photo, note vertical displacement in deck. - Smith River Bridge, CA State Highway 199 Spanning Smith River, Crescent City, Del Norte County, CA

  1. BRIDGE BUILDER WILLIAM FLINN’S “CAMP & BRIDGE BUILDING OUTFIT”. INTERIOR ...

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

    BRIDGE BUILDER WILLIAM FLINN’S “CAMP & BRIDGE BUILDING OUTFIT”. INTERIOR VIEW SHOWING LABORERS AT MEAL TIME. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  2. 42. VIEW OF WALL AT EAST ENTRANCE TO WALKWAY. 'FRANK ...

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

    42. VIEW OF WALL AT EAST ENTRANCE TO WALKWAY. 'FRANK AUZA, FLAGSTAFF SHEEP CO.' SCRATCHED INTO FRESH MORTAR CAP ON STONE WALL. February 1987 - Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest), Cave Creek, Maricopa County, AZ

  3. Redox Zonation and Oscillation in the Hyporheic Zone of the Ganges-Brahmaputra-Meghna Delta: Implications for the Fate of Groundwater Arsenic during Discharge

    PubMed Central

    Jung, Hun Bok; Zheng, Yan; Rahman, Mohammad W.; Rahman, Mohammad M.; Ahmed, Kazi M.

    2015-01-01

    Riverbank sediment cores and pore waters, shallow well waters, seepage waters and river waters were collected along the Meghna Riverbank in Gazaria Upazila, Bangladesh in Jan. 2006 and Oct.-Nov. 2007 to investigate hydrogeochemical processes controlling the fate of groundwater As during discharge. Redox transition zones from suboxic (0-2 m depth) to reducing (2-5 m depth) then suboxic conditions (5-7 m depth) exist at sites with sandy surficial deposits, as evidenced by depth profiles of pore water (n=7) and sediment (n=11; diffuse reflectance, Fe(III)/Fe ratios and Fe(III) concentrations). The sediment As enrichment zone (up to ~700 mg kg−1) is associated with the suboxic zones mostly between 0-2 m depth and less frequently between 5-7 m depth. The As enriched zones consist of several 5 to 10 cm-thick dispersed layers and span a length of ~5-15 m horizontally from the river shore. Depth profiles of riverbank pore water deployed along a 32 m transect perpendicular to the river shore show elevated levels of dissolved Fe (11.6±11.7 mg L−1) and As (118±91 μg L−1, mostly as arsenite) between 2-5 m depth, but lower concentrations between 0-2 m depth (0.13±0.19 mg L−1 Fe, 1±1 μg L−1 As) and between 5-6 m depth (1.14±0.45 mg L−1 Fe, 28±17 μg L−1 As). Because it would take more than a few hundred years of steady groundwater discharge (~10 m yr−1) to accumulate hundreds of mg kg−1 of As in the riverbank sediment, it is concluded that groundwater As must have been naturally elevated prior to anthropogenic pumping of the aquifer since the 1970s. Not only does this lend unequivocal support to the argument that As occurrence in the Ganges-Brahmaputra-Meghna Delta groundwater is of geogenic origin, it also calls attention to the fate of this As enriched sediment as it may recycle As into the aquifer. PMID:26855475

  4. 37. Photographic copy of the original construction drawing, 1934, by ...

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

    37. Photographic copy of the original construction drawing, 1934, by Sverdrup and Parcel, Consulting Engineers, from microfilm copy at Bridge Division, Missouri Highway and Transportation Department. Stress sheet, continuous span - Mark Twain Memorial Bridge, Spanning Mississippi River at US Route 36, Hannibal, Marion County, MO

  5. 16. 'Concrete Bridge Over Salt River, Port Kenyon, Humboldt County, ...

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

    16. 'Concrete Bridge Over Salt River, Port Kenyon, Humboldt County, California, A.J. Logan, County Surveyor, H.J. Brunnier, Consulting Engineer, March 7, 1919,' showing detail of floor beam at central pier, half section of cantilever slab at end of bridge, floor beam end panels, slab reinforcing, plan of slab reinforcing, diagram of slab bars, typical floor girder. - Salt River Bridge, Spanning Salt River at Dillon Road, Ferndale, Humboldt County, CA

  6. Qualitative evaluation of rock weir field performance and failure mechanisms

    USGS Publications Warehouse

    Mooney, David M.; Holmquist-Johnson, Christopher L.; Holburn, Elaina

    2007-01-01

    River spanning loose-rock structures provide sufficient head for irrigation diversion, permit fish passage over barriers, protect banks, stabilize degrading channels, activate side channels, reconnect floodplains, and create in-channel habitat. These structures are called by a variety of names including rock weirs, alphabet (U-, A-, V-, W-) weirs, Jhooks, and rock ramps. These structures share the common characteristics of:Loose rock construction materials (individually placed or dumped rocks with little or no concrete);Extents spanning the width of the river channel; andAn abrupt change in the water surface elevation at low flows.

  7. Hurricane Sandy: Shared Trauma and Therapist Self-Disclosure.

    PubMed

    Rao, Nyapati; Mehra, Ashwin

    2015-01-01

    Hurricane Sandy was one of the most devastating storms to hit the United States in history. The impact of the hurricane included power outages, flooding in the New York City subway system and East River tunnels, disrupted communications, acute shortages of gasoline and food, and a death toll of 113 people. In addition, thousands of residences and businesses in New Jersey and New York were destroyed. This article chronicles the first author's personal and professional experiences as a survivor of the hurricane, more specifically in the dual roles of provider and trauma victim, involving informed self-disclosure with a patient who was also a victim of the hurricane. The general analytic framework of therapy is evaluated in the context of the shared trauma faced by patient and provider alike in the face of the hurricane, leading to important implications for future work on resilience and recovery for both the therapist and patient.

  8. Transient simulation of groundwater levels within a sandbar of the Colorado River, Marble Canyon, Arizona, 2004

    USGS Publications Warehouse

    Sabol, Thomas A.; Springer, Abraham E.

    2013-01-01

    Seepage erosion and mass failure of emergent sandy deposits along the Colorado River in Grand Canyon National Park, Arizona, are a function of the elevation of groundwater in the sandbar, fluctuations in river stage, the exfiltration of water from the bar face, and the slope of the bar face. In this study, a generalized three-dimensional numerical model was developed to predict the time-varying groundwater level, within the bar face region of a freshly deposited eddy sandbar, as a function of river stage. Model verification from two transient simulations demonstrates the ability of the model to predict groundwater levels within the onshore portion of the sandbar face across a range of conditions. Use of this generalized model is applicable across a range of typical eddy sandbar deposits in diverse settings. The ability to predict the groundwater level at the onshore end of the sandbar face is essential for both physical and numerical modeling efforts focusing on the erosion and mass failure of eddy sandbars downstream of Glen Canyon Dam along the Colorado River.

  9. 5. Downstream elevation, view to southeast. Dark stains on side ...

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

    5. Downstream elevation, view to southeast. Dark stains on side of main girder are from deck drain scuppers, marking deck level within the girders. Compare this view and CA-126-7 to CA-126-19 for indication of severity of siltation of Salt River channel has silted. - Salt River Bridge, Spanning Salt River at Dillon Road, Ferndale, Humboldt County, CA

  10. 2. AERIAL VIEW OF INTERCHANGE OF ARROYO SECO PARKWAY AND ...

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

    2. AERIAL VIEW OF INTERCHANGE OF ARROYO SECO PARKWAY AND INTERSTATE I-5 INTERCHANGE. NOTE ARROYO SECO DRAINAGE INTO LOS ANGELES RIVER AT BOTTOM CENTER. - Arroyo Seco Parkway, Figueroa Street Viaduct, Spanning Los Angeles River, Los Angeles, Los Angeles County, CA

  11. POURING FOOTING OF PIER #1. View is to the southwest, ...

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

    POURING FOOTING OF PIER #1. View is to the southwest, looking from Pier 2 in Trinity County toward Pier 1 in Humboldt County - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  12. COUNTERWEIGHT ON WEST SIDE. View is to the northwest of ...

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

    COUNTERWEIGHT ON WEST SIDE. View is to the northwest of counterweight on Humboldt County end of bridge, probably taken from the old suspension bridge - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  13. 30. VIEW OF THE WESTERN SIDEWALK ON PIER 5, SHOWING ...

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

    30. VIEW OF THE WESTERN SIDEWALK ON PIER 5, SHOWING DEDICATION PLAQUE ON EASTERN PIER TOWER, LOOKING EAST - West End-North Side Bridge, Spanning Ohio River, approximately 1 mile downstream from confluence of Monongahela & Allegheny rivers, Pittsburgh, Allegheny County, PA

  14. 17. CONTROL ROOM, NORTH SIDE, WITH BRIDGE SWING CONTROLS ON ...

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

    17. CONTROL ROOM, NORTH SIDE, WITH BRIDGE SWING CONTROLS ON LEFT, SIGNAL CONTROLS ON RIGHT, WHISTLE PULL TOP. RADIO TELEPHONE IN CENTER BACK (Fred Small) - Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR

  15. 7. The north face of the Broad Street bridge as ...

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

    7. The north face of the Broad Street bridge as seen from Veterans Memorial Auditorium, located on the west bank of the river. - Broad Street Bridge, Spanning Scioto River at U.S. Route 40 (Broad Street), Columbus, Franklin County, OH

  16. 26. VIEW FROM EAST IN BRIDGE TENDER'S HOUSE, LEVERS FOR ...

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

    26. VIEW FROM EAST IN BRIDGE TENDER'S HOUSE, LEVERS FOR GASOLINE ENGINE OPERATION FOR BRIDGE AND THEIR CONNECTIONS TO CONTROL RODS ON DOWNSTREAM SIDE OF SWING-SPAN; new bridge located in background - Tipers Bridge, Spanning Great Wicomico River at State Route 200, Kilmarnock, Lancaster County, VA

  17. 45. Photographic copy of the original construction drawing, 1934, by ...

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

    45. Photographic copy of the original construction drawing, 1934, by Sverdrup and Parcel, Consulting Engineers, from microfilm copy at Bridge Division, Missouri Highway and Transportation Department. Cross section--300-ft. span - Mark Twain Memorial Bridge, Spanning Mississippi River at US Route 36, Hannibal, Marion County, MO

  18. 44. Photographic copy of the original construction drawing, 1934, by ...

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

    44. Photographic copy of the original construction drawing, 1934, by Sverdrup and Parcel, Consulting Engineers, from microfilm copy at Bridge Division, Missouri Highway and Transportation Department. Details of 300-ft. span - Mark Twain Memorial Bridge, Spanning Mississippi River at US Route 36, Hannibal, Marion County, MO

  19. 19. Photocopy of Blueprint (Original blueprint located in Grays Harbor ...

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

    19. Photocopy of Blueprint (Original blueprint located in Grays Harbor County Bridge File No. 4731/0.5 COAST BRIDGE COMPANY'S CONSTRUCTION BLUEPRINT OF 'FLOOR SYSTEM FOR 120' RIVETED SPAN' DATED JULY 1915 - West Wishkah Bridge, West Wishkah Road Spanning Wishkah River Middle Fork, Aberdeen, Grays Harbor County, WA

  20. 75 FR 55475 - Drawbridge Operation Regulation; Pequonnock River, Bridgeport, CT

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-13

    ... two bridges because the draw spans of the bridges have been removed. DATES: This rule is effective... removing the operation regulations for two moveable draw bridges that no longer have moveable spans. Under... litigation, eliminate ambiguity, and reduce burden. Protection of Children We have analyzed this rule under...

  1. 8. DETAIL VIEW OF UNDERSIDE OF WEST END OF BRIDGE ...

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

    8. DETAIL VIEW OF UNDERSIDE OF WEST END OF BRIDGE AND CONCRETE BENTS SHOWING PRESERVED IMPRESS OF WOOD FORMS AND WOOD PILINGS IN RIVER POSSIBLY FROM EARLIER BRIDGE, FACING EAST - Salkehatchie Bridge, State Route No. 64 spanning Salkehatchie River, Barnwell, Barnwell County, SC

  2. PLACING TOP CHORD CENTER PANEL. View is to the northwest ...

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

    PLACING TOP CHORD CENTER PANEL. View is to the northwest from the old suspension bridge. Chord members being moved into place by jigger stick and highline - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  3. 33 CFR 165.811 - Atchafalaya River, Berwick Bay, LA-regulated navigation area.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Bridge. (c) When the Morgan City River gauge reads 3.0 feet or above mean sea level, in addition to the... apply to a towing vessel which will navigate: (1) under the lift span of the SPRR Bridge; or (2) through...

  4. 33 CFR 165.811 - Atchafalaya River, Berwick Bay, LA-regulated navigation area.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Bridge. (c) When the Morgan City River gauge reads 3.0 feet or above mean sea level, in addition to the... apply to a towing vessel which will navigate: (1) under the lift span of the SPRR Bridge; or (2) through...

  5. 33 CFR 165.811 - Atchafalaya River, Berwick Bay, LA-regulated navigation area.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Bridge. (c) When the Morgan City River gauge reads 3.0 feet or above mean sea level, in addition to the... apply to a towing vessel which will navigate: (1) under the lift span of the SPRR Bridge; or (2) through...

  6. 33 CFR 165.811 - Atchafalaya River, Berwick Bay, LA-regulated navigation area.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Bridge. (c) When the Morgan City River gauge reads 3.0 feet or above mean sea level, in addition to the... apply to a towing vessel which will navigate: (1) under the lift span of the SPRR Bridge; or (2) through...

  7. Assessment of chemical and biological significance of arsenical species in the Maurice River drainage basin (N. J. ). Part I. Distribution in water and river and lake sediments

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Faust, S.D.; Winka, A.J.; Belton, T.

    1987-01-01

    Levels of arsenic were determined in the bottom sediments and waters of the Maurice River, Blackwater Branch, and Union Lake, (N.J.) that were contaminated by a local chemical industry. This was the only known source of the arsenic. Levels of total arsenic in the sediments and waters were determined quarterly over the course of one year. Sediments were extracted for water soluble and total extractable arsenic fractions and partitioned into four species: monomethylarsonic acid (MMAA), dimethylarsinic acid (DMAA), arsenite (As(III)), and arsenate (As(V)). In Union Lake at a shallow sandy sediment site, As (V) predominates. In organic sediments, As (III)more » or (V) predominate depending upon the dissolved oxygen content of the overlying waters. The oxidations state of the arsenic was affected also by the seasonal lake cycles of stratifying or mixing.« less

  8. Geomorphic analysis of the Middle Rio Grande-Elephant Butte Reach, New Mexico

    Treesearch

    Tracy Elizabeth Owen

    2012-01-01

    The Elephant Butte Reach spans about 30 miles, beginning from the South Boundary of the Bosque del Apache National Wildlife Refuge (River Mile 73.9) to the "narrows" of the Elephant Butte Reservoir (River Mile 44.65), in central New Mexico. Sediment plugs occasionally form along the Middle Rio Grande, completely blocking the main channel of the river. In 1991...

  9. 6. PART 3 OF 3 PART PANORAMA WITH NOS. CA265J4 ...

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

    6. PART 3 OF 3 PART PANORAMA WITH NOS. CA-265-J-4 AND CA-265-J-5 OF FIGUEROA STREET AND LOS ANGELES RIVER VIADUCTS. NOTE ARROYO SECO CHANNEL ENTERING LOS ANGELES RIVER UNDER RAILROAD TRESTLE AT RIGHT. LOOKING 268°W. - Arroyo Seco Parkway, Figueroa Street Viaduct, Spanning Los Angeles River, Los Angeles, Los Angeles County, CA

  10. Stratigraphic and microfossil evidence for a 4500-year history of Cascadia subduction zone earthquakes and tsunamis at Yaquina River estuary, Oregon, USA

    USGS Publications Warehouse

    Graehl, Nicholas A; Kelsey, Harvey M.; Witter, Robert C.; Hemphill-Haley, Eileen; Engelhart, Simon E.

    2015-01-01

    The Sallys Bend swamp and marsh area on the central Oregon coast onshore of the Cascadia subduction zone contains a sequence of buried coastal wetland soils that extends back ∼4500 yr B.P. The upper 10 of the 12 soils are represented in multiple cores. Each soil is abruptly overlain by a sandy deposit and then, in most cases, by greater than 10 cm of mud. For eight of the 10 buried soils, times of soil burial are constrained through radiocarbon ages on fine, delicate detritus from the top of the buried soil; for two of the buried soils, diatom and foraminifera data constrain paleoenvironment at the time of soil burial.We infer that each buried soil represents a Cascadia subduction zone earthquake because the soils are laterally extensive and abruptly overlain by sandy deposits and mud. Preservation of coseismically buried soils occurred from 4500 yr ago until ∼500–600 yr ago, after which preservation was compromised by cessation of gradual relative sea-level rise, which in turn precluded drowning of marsh soils during instances of coseismic subsidence. Based on grain-size and microfossil data, sandy deposits overlying buried soils accumulated immediately after a subduction zone earthquake, during tsunami incursion into Sallys Bend. The possibility that the sandy deposits were sourced directly from landslides triggered upstream in the Yaquina River basin by seismic shaking was discounted based on sedimentologic, microfossil, and depositional site characteristics of the sandy deposits, which were inconsistent with a fluvial origin. Biostratigraphic analyses of sediment above two buried soils—in the case of two earthquakes, one occurring shortly after 1541–1708 cal. yr B.P. and the other occurring shortly after 3227–3444 cal. yr B.P.—provide estimates that coseismic subsidence was a minimum of 0.4 m. The average recurrence interval of subduction zone earthquakes is 420–580 yr, based on an ∼3750–4050-yr-long record and seven to nine interearthquake intervals.The comparison of the Yaquina Bay earthquake record to similar records at other Cascadia coastal sites helps to define potential patterns of rupture for different earthquakes, although inherent uncertainty in dating precludes definitive statements about rupture length during earthquakes. We infer that in the first half of the last millennia, the northern Oregon part of the subduction zone had a different rupture history than the southern Oregon part of the subduction zone, and we also infer that at ca. 1.6 ka, two earthquakes closely spaced in time together ruptured a length of the megathrust that extends at least from southwestern Washington to southern Oregon.

  11. 37. ALTERNATE DESIGN, SIMILAR TO THAT ULTIMATELY SELECTED, BUT USING ...

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

    37. ALTERNATE DESIGN, SIMILAR TO THAT ULTIMATELY SELECTED, BUT USING STEPPED TOWERS, AND WITH PYLONS CAPPED BY LANTERNS Pen-and-ink drawing by project architect Alfred Eichler, ca. 1934. - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  12. LOOKING EAST. View is to the northeast along centerline of ...

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

    LOOKING EAST. View is to the northeast along centerline of deck, looking from Humboldt County toward Trinity County. The old suspension bridge is still in place at right - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  13. 24. VIEW, LOOKING NORTHEAST, SHOWING MAIN TRANSMISSION IN LEFT FOREGROUND, ...

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

    24. VIEW, LOOKING NORTHEAST, SHOWING MAIN TRANSMISSION IN LEFT FOREGROUND, GASOLINE-POWERED WAUKESHA AUXILIARY DRIVE MOTOR AT CENTER, AND ONE OF TWO MAIN ELECTRIC DRIVE MOTORS AT LEFT CENTER - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  14. 3. View looking Northwest. Viaduct was a combination masonry and ...

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

    3. View looking Northwest. Viaduct was a combination masonry and iron truss structure with a swing span over the Cuyahoga River. Only the masonry section, west of the river, still stands. - Superior Avenue Viaduct, Cleveland East & West side, Cuyahoga Valley Vicinity, Cleveland, Cuyahoga County, OH

  15. 20. A PHOTO IMAGE OF THE NORTH BANK OF THE ...

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

    20. A PHOTO IMAGE OF THE NORTH BANK OF THE ST. JOSEPH'S RIVER IN THE VICINITY OF THE BRIDGE. - County Line Bridge, Spanning St. Joseph River at State Route 219, 0.6 mile south of U.S. Route 20, Osceola, St. Joseph County, IN

  16. An Integrated Ensemble-Based Operational Framework to Predict Urban Flooding: A Case Study of Hurricane Sandy in the Passaic and Hackensack River Basins

    NASA Astrophysics Data System (ADS)

    Saleh, F.; Ramaswamy, V.; Georgas, N.; Blumberg, A. F.; Wang, Y.

    2016-12-01

    Advances in computational resources and modeling techniques are opening the path to effectively integrate existing complex models. In the context of flood prediction, recent extreme events have demonstrated the importance of integrating components of the hydrosystem to better represent the interactions amongst different physical processes and phenomena. As such, there is a pressing need to develop holistic and cross-disciplinary modeling frameworks that effectively integrate existing models and better represent the operative dynamics. This work presents a novel Hydrologic-Hydraulic-Hydrodynamic Ensemble (H3E) flood prediction framework that operationally integrates existing predictive models representing coastal (New York Harbor Observing and Prediction System, NYHOPS), hydrologic (US Army Corps of Engineers Hydrologic Modeling System, HEC-HMS) and hydraulic (2-dimensional River Analysis System, HEC-RAS) components. The state-of-the-art framework is forced with 125 ensemble meteorological inputs from numerical weather prediction models including the Global Ensemble Forecast System, the European Centre for Medium-Range Weather Forecasts (ECMWF), the Canadian Meteorological Centre (CMC), the Short Range Ensemble Forecast (SREF) and the North American Mesoscale Forecast System (NAM). The framework produces, within a 96-hour forecast horizon, on-the-fly Google Earth flood maps that provide critical information for decision makers and emergency preparedness managers. The utility of the framework was demonstrated by retrospectively forecasting an extreme flood event, hurricane Sandy in the Passaic and Hackensack watersheds (New Jersey, USA). Hurricane Sandy caused significant damage to a number of critical facilities in this area including the New Jersey Transit's main storage and maintenance facility. The results of this work demonstrate that ensemble based frameworks provide improved flood predictions and useful information about associated uncertainties, thus improving the assessment of risks as when compared to a deterministic forecast. The work offers perspectives for short-term flood forecasts, flood mitigation strategies and best management practices for climate change scenarios.

  17. 7. View from gate spanning mouth of Dry Dock 5, ...

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

    7. View from gate spanning mouth of Dry Dock 5, showing (1-r) north wall of Pier 10 and south wall of Pier 11. - Charlestown Navy Yard, Pier 10, Between Piers 9 & 11 along Mystic River on Charlestown Waterfront at eastern edge of Charlestown Navy Yard, Boston, Suffolk County, MA

  18. The gravel sand transition in a disturbed catchment

    NASA Astrophysics Data System (ADS)

    Knighton, A. David

    1999-03-01

    More than 40 million cubic metres of mining waste were supplied to the Ringarooma River between 1875 and 1984, leading to successive phases of aggradation and degradation. The natural bed material is gravel but, given the volume of introduced load and the fact that much of the input was less than 5 mm in diameter, the size composition of the bed changed from gravel to sand during the phase of downstream progressive aggradation. A very sharp gravel-sand transition developed in which median grain size decreased from over 30 mm to under 3 mm in less than 500 m. With upstream supplies of mining debris becoming depleted first, degradation followed the same downstream progressive pattern as aggradation, causing the transition to migrate downstream. By 1984, the river could be regarded as a series of zones, each characterized by a particular bed condition: a natural cobble-gravel bed, unaffected by mining inputs (0-32 km); pre-disturbance bed re-exposed by degradation over 35-40 years (32-53 km); sandy substrate with a gravel armour produced by differential transport during degradation (53-65 km); sand dominated but with developing surface patches of coarser material (65-75 km); sandy bed reflecting the size composition of the original mining input (75-118 km). Although the gravel-sand transition itself is sharp, the transitional zone is lengthy (53-75 km). As degradation continues, the gravel-sand transition is expected to progress downstream but it has remained in a stable position for 12 years. Indeed, two major floods during the period released large quantities of sand from the sub-armour layer and newly-formed banks of mine tailings, causing fining both above and below the transition. Surface grain size is an adjustable component in the transitional zone as the river strives to recover from a major anthropogenic disturbance.

  19. Human impact on regional groundwater composition through intervention in natural flow patterns and changes in land use

    NASA Astrophysics Data System (ADS)

    Schot, P. P.; van der Wal, J.

    1992-06-01

    The relations between groundwater composition, land use, soil conditions and flow patterns on a regional scale are studied for the Gooi and Vechtstreek area in the Netherlands. This densely populated area consists of a glacier-created ridge with dry sand soils bordered by the Vecht and Eem River plains with wet peat and clay soils. R-mode factor analysis and Q-mode cluster analysis were applied to a set of 1349 groundwater analyses to determine the factors controlling groundwater composition and the main resulting water types. The results indicate that groundwater composition in the study area is affected on a regional scale by human activities through changes in land use and intervention in natural flow patterns. On the ridge, ground water is recharged by precipitation, which dissolves carbonates from the matrix of the sandy aquifer. Increased solute concentrations in shallow ground water, especially of nitrate, sulphate and potassium, indicate increased pollution resulting from urbanization and increasingly intensive agricultural activity over the past decades. In the Vecht River plain infiltration occurs as a result of drainage of polders and groundwater extraction on the ridge. Recharge occurs by precipitation and from polluted surface water to which ammonium, organic complexes and carbonic acid are added through decomposition of organic matter in the peat and clay soils. The carbonic acid results in enhanced dissolution of carbonates present in the soil and the underlying sandy aquifer. Oxygen depletion and subsequent low redox potentials result in denitrification, dissolution of manganese and iron oxides, and sulphate reduction. The flow of ground water from high-level to low-level polders causes displacement of a former stagnant brakish groundwater body under the Vecht River plain accompanied by increased mixing of fresh and brackish ground water.

  20. Holocene coastal paleoenvironmental record, Bay of Brest

    NASA Astrophysics Data System (ADS)

    Fernane, Assia; Gandouin, Emmanuel; Goslin, Jérôme; Penaud, Aurélie; Van Vliet lanoë, Brigitte

    2013-04-01

    Coastal areas are sensitive environments regarding the risk of submersion and the impact on biodiversity induced by salinity changes. These areas thus provide good palaeocecological archives to monitor palaeo sea level changes and the associated adaptation of different biological communities. The north-western coast of France has poorly been investigated regarding its Holocene palaeoecological signatures (Morzadec-Kerfourn, 1974; Naughton et al., 2007). Chironomids have been recognized to be an efficient tool for palaeoclimate and palaeosalinity reconstructions in lakes (Brooks, 2006), and more recently in river floodplains (Gandouin et al, 2006). In this study, environmental changes related to both climate processes and human disturbances, were reconstructed over the last 5000 years, based on pollen and chironomid assemblages from two coastal cores retrieved at Pors Milin (Brittany, NW France). The sedimentary sequences consist of terrestrial peaty layers interdigited with marine clastic deposits. The study area is composed by a sandy beach, truncating the peat, limited by a high sandy bar, and a back marsh developed at + 4 m NGF. Pollen and chironomid results reveal that anthropogenic factors would mainly control environmental changes that occurred in this sector. The disappearance of many chironomid taxa (inhabitants of main river channel) and the dramatic fall in diversity may have been induced by the development of the Merovingian forest clearance at Pors Milin. Indeed, we suggest that the development of agriculture, the river embankment and the draining of wetlands may explain the chironomid habitat loss and the subsequent fall of biodiversity. This change in faunal assemblages occurred synchronously with a decrease in the "arborean / non arborean" pollen ratio reflecting the land opening of the watershed. Several nitrophilous and anthropogenic pollen taxa reinforce our hypothesis concerning the development of agricultural and livestock farming activities at that time.

  1. Coupled economic-coastline modeling with suckers and free riders

    NASA Astrophysics Data System (ADS)

    Williams, Zachary C.; McNamara, Dylan E.; Smith, Martin D.; Murray, A. Brad.; Gopalakrishnan, Sathya

    2013-06-01

    erosion is a natural trend along most sandy coastlines. Humans often respond to shoreline erosion with beach nourishment to maintain coastal property values. Locally extending the shoreline through nourishment alters alongshore sediment transport and changes shoreline dynamics in adjacent coastal regions. If left unmanaged, sandy coastlines can have spatially complex or simple patterns of erosion due to the relationship of large-scale morphology and the local wave climate. Using a numerical model that simulates spatially decentralized and locally optimal nourishment decisions characteristic of much of U.S. East Coast beach management, we find that human erosion intervention does not simply reflect the alongshore erosion pattern. Spatial interactions generate feedbacks in economic and physical variables that lead to widespread emergence of "free riders" and "suckers" with subsequent inequality in the alongshore distribution of property value. Along cuspate coastlines, such as those found along the U.S. Southeast Coast, these long-term property value differences span an order of magnitude. Results imply that spatially decentralized management of nourishment can lead to property values that are divorced from spatial erosion signals; this management approach is unlikely to be optimal.

  2. Evolution and selection of river networks: Statics, dynamics, and complexity

    PubMed Central

    Rinaldo, Andrea; Rigon, Riccardo; Banavar, Jayanth R.; Maritan, Amos; Rodriguez-Iturbe, Ignacio

    2014-01-01

    Moving from the exact result that drainage network configurations minimizing total energy dissipation are stationary solutions of the general equation describing landscape evolution, we review the static properties and the dynamic origins of the scale-invariant structure of optimal river patterns. Optimal channel networks (OCNs) are feasible optimal configurations of a spanning network mimicking landscape evolution and network selection through imperfect searches for dynamically accessible states. OCNs are spanning loopless configurations, however, only under precise physical requirements that arise under the constraints imposed by river dynamics—every spanning tree is exactly a local minimum of total energy dissipation. It is remarkable that dynamically accessible configurations, the local optima, stabilize into diverse metastable forms that are nevertheless characterized by universal statistical features. Such universal features explain very well the statistics of, and the linkages among, the scaling features measured for fluvial landforms across a broad range of scales regardless of geology, exposed lithology, vegetation, or climate, and differ significantly from those of the ground state, known exactly. Results are provided on the emergence of criticality through adaptative evolution and on the yet-unexplored range of applications of the OCN concept. PMID:24550264

  3. Environmental Assessment: Eagle Heights Housing Area Revitalization Dover Air Force Base, Delaware

    DTIC Science & Technology

    2004-07-01

    tidal species. Butterflies were the only insects surveyed, and nine were found on base. Approximately 51 species of birds were recorded on base...Jones River adjacent to the northern border of the housing area, the fro-fruit (Phyla lanceolata) and the hyssop-leaf hedge- nettle (Stachys...other sites in Delaware that this species is found. The hyssop-leaf hedge- nettle thrives in moist sandy soil along the coast and shoreline and occurs

  4. Channel response to a new hydrological regime in southwestern Australia

    NASA Astrophysics Data System (ADS)

    Callow, J. N.; Smettem, K. R. J.

    2007-02-01

    The Kent River flows from semi-arid headwaters in the agricultural (wheatbelt) region of Western Australia to a wetter and forested lower-catchment. It is set in an atypical fluvial environment, with rainfall decreasing inland towards a low-relief upper catchment. Replacement of native deep-rooted perennial vegetation with shallow-rooted seasonal crops has altered the hydrology of the upper catchment. Clearing for agriculture has also increased recharge of regional groundwater systems causing groundwater to rise and mobilise salt stores. This has increased stream salinity which has degradation riparian vegetation and decreased flow resistance. Elevated groundwater has also affected streamflow, increasing flow duration and annual discharge. The altered hydrological regime has affected geomorphic stability, resulting in channel responses that include incision and removal of uncohesive material. Channel response is variable, showing a high dependence on channel morphotype, channel boundary material and severity of salinity (degree of vegetation degradation). Response in confined reaches bounded by sandy material has been characterised by minor lateral bank erosion. In the fine-grained, wider, low-gradient reaches, mid-channel islands have been stripped of sandy sediment where vegetation has degraded. Following an initial period of high erosion rates in these reaches, the channel is now slowly adjusting to a new set of boundary conditions. The variable response has significant implications for management of salt affected rivers in southwestern Australia.

  5. View of substructure of Sixth Street Bridge overcrossing of Los ...

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

    View of substructure of Sixth Street Bridge overcrossing of Los Angeles River. Looking west. Note dark hole at lower with is access ramp to river channel seen in HAER CA-176-56 - Sixth Street Bridge, Spanning 101 Freeway at Sixth Street, Los Angeles, Los Angeles County, CA

  6. Evaluation of effects of super-heavy loading on the US 41 bridge over the White River : appendices.

    DOT National Transportation Integrated Search

    2011-01-01

    Built in 1958, the US-41 White River Bridge is a two-girder, riveted steel structure located in Hazelton, IN. The bridge is comprised of two, sixteen span superstructures sharing a common substructure. Each superstructure also contains four pin and h...

  7. Evaluation of effects of super-heavy loading on the US 41 bridge over the White River.

    DOT National Transportation Integrated Search

    2011-01-01

    Built in 1958, the US-41 White River Bridge is a two-girder, riveted steel structure located in Hazelton, IN. The bridge is comprised of two, sixteen span : superstructures sharing a common substructure. Each superstructure also contains four pin and...

  8. STARTING EXCAVATION PIER 2. This view is roughly northeast, with ...

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

    STARTING EXCAVATION PIER 2. This view is roughly northeast, with Pier 2 on the Trinity County end of the bridge. The old suspension bridge, at upper right, was upstream of new bridge - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

  9. 20. VIEW, LOOKING SOUTH, SHOWING ONE OF TWO MAIN ELECTRIC ...

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

    20. VIEW, LOOKING SOUTH, SHOWING ONE OF TWO MAIN ELECTRIC MOTORS IN FOREGROUND WITH REDUCTION GEAR HOUSING AT RIGHT, GASOLINE- POWERED WAUKESHA AUXILIARY DRIVE MOTOR AT MIDDLE, AND GASOLINE- POWERED EMERGENCY GENERATOR IN BACKGROUND - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  10. Flood-Inundation Maps for the Meramec River at Valley Park and at Fenton, Missouri, 2017

    DOT National Transportation Integrated Search

    2017-01-01

    Two sets of digital flood-inundation map libraries that spanned a combined 16.7-mile reach of the Meramec River that extends upstream from Valley Park, Missouri, to downstream from Fenton, Mo., were created by the U.S. Geological Survey (USGS) in coo...

  11. 2. PHOTOGRAPH LOOKING SOUTHEAST, OF THE SOUTH BANK OF THE ...

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

    2. PHOTOGRAPH LOOKING SOUTHEAST, OF THE SOUTH BANK OF THE RIVER, SHOWING THE SOUTH ABUTMENTS, AND THE IMMEDIATE ENVIRONMENT. THE SOUTH BANK RISES STEEPLY AND RESIDENCES ARE LOCATED ON THE UPPER ESCARPMENT. - Wabash County Bridge No. 509, Spanning Wabash River at Carroll & Smith Streets, Wabash, Wabash County, IN

  12. 18. A VIEW EAST, SHOWING THE HEAVILY WOODED BANKS OF ...

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

    18. A VIEW EAST, SHOWING THE HEAVILY WOODED BANKS OF THE ST. JOSEPH RIVER. THIS IS TYPICAL OF THE RIVERSIDE ENVIRONMENT OF THE BRIDGE. - County Line Bridge, Spanning St. Joseph River at State Route 219, 0.6 mile south of U.S. Route 20, Osceola, St. Joseph County, IN

  13. 76 FR 19911 - Drawbridge Operation Regulation; Calcasieu River, Westlake, LA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-11

    ... maintenance and updates to the bridge's operating system. This deviation allows the bridge to remain closed to...'s operating system while minimizing the exposure of personnel to hazards associated with performing... deviation from the operating schedule for the swing span bridge across the Calcasieu River, mile 36.4, at...

  14. 1. CONTEXTUAL VIEW OF BRIDGE IN SETTING, LOOKING SOUTHWEST, FROM ...

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

    1. CONTEXTUAL VIEW OF BRIDGE IN SETTING, LOOKING SOUTHWEST, FROM DOWNSTREAM. Crew, vehicles, boats, and equipment are from the California Department of Transportation's Transportation Laboratory conducting test borings for the replacement bridge. - Smith River Bridge, CA State Highway 199 Spanning Smith River, Crescent City, Del Norte County, CA

  15. 18. Wayne Chandler, Photographer, August 1993 Photographic copy of Xerox ...

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

    18. Wayne Chandler, Photographer, August 1993 Photographic copy of Xerox copy of original plans, dated 1932, by Wisconsin Highway Commission. Xerox copy in possession of Westbrook Associated Engineers, Spring Green, Wisconsin. SUPERSTRUCTURE DETAILS. - Chippewa River Bridge, Spanning Chippewa River at State Highway 35, Nelson, Buffalo County, WI

  16. 16. Wayne Chandler, Photographer, August 1993 Photographic copy of Xerox ...

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

    16. Wayne Chandler, Photographer, August 1993 Photographic copy of Xerox copy of original plans, dated 1932, by Wisconsin Highway Commission. Xerox copy in possession of Westbrook Associated Engineers, Spring Green, Wisconsin. SUPERSTRUCTURE DETAILS. - Chippewa River Bridge, Spanning Chippewa River at State Highway 35, Nelson, Buffalo County, WI

  17. 17. Wayne Chandler, Photographer, August 1993 Photographic copy of Xerox ...

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

    17. Wayne Chandler, Photographer, August 1993 Photographic copy of Xerox copy of original plans, dated 1932, by Wisconsin Highway Commission. Xerox copy in possession of Westbrook Associated Engineers, Spring Green, Wisconsin. SUPERSTRUCTURE DETAILS. - Chippewa River Bridge, Spanning Chippewa River at State Highway 35, Nelson, Buffalo County, WI

  18. 5. PART 2 OF 3 PART PANORAMA WITH NOS. CA265J4 ...

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

    5. PART 2 OF 3 PART PANORAMA WITH NOS. CA-265-J-4 AND CA-265-J-6 OF FIGUEROA STREET AND LOS ANGELES RIVER VIADUCTS. LOOKING 308°W. - Arroyo Seco Parkway, Figueroa Street Viaduct, Spanning Los Angeles River, Los Angeles, Los Angeles County, CA

  19. Evaluation of effects of super-heavy loading on the US 41 bridge over the White River : technical summary.

    DOT National Transportation Integrated Search

    2011-01-01

    Built in 1958, the US-41 White River Bridge is a two-girder, riveted steel structure located near Hazelton, IN. The bridge is comprised of two, sixteen span superstructures sharing a common substructure. Each superstructure also contains four pin and...

  20. 16. LOG AND PLANK BRIDGE ON ACCESS ROAD NEAR BRIDGE ...

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

    16. LOG AND PLANK BRIDGE ON ACCESS ROAD NEAR BRIDGE SITE; SAME STRUCTURE AS SHOWN IN PHOTO #12. ZION NP NEGATIVE NO. 967 ZIO. - Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of Virgin River on Zion-Mount Carmel Highway, Springdale, Washington County, UT

  1. 3. VIEW TO NORTHEAST, NORTH SIDE OF CENTER DRUM MACHINERY ...

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

    3. VIEW TO NORTHEAST, NORTH SIDE OF CENTER DRUM MACHINERY ROOM. MOTOR #1 COMPARTMENT IN REAR, AUXILIARY MOTOR DRIVE SHAFT, POWER PANELS ON BACK OF AUXILIARY MOTOR HOUSE. BRIDGE DECK FRAMING ABOVE. - Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR

  2. 78 FR 42452 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-16

    ... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of deviation... Sacramento, CA. The deviation is necessary to allow the bridge owner to make bridge repairs. This deviation... Sacramento, CA. The drawbridge navigation span provides 109 feet vertical clearance above Mean High Water in...

  3. Zambezi River Delta

    NASA Image and Video Library

    2013-08-29

    It drains a watershed that spans eight countries and nearly 1.6 million square kilometers 600,000 square miles. The Zambezi also Zambeze is the fourth largest river in Africa, and the largest east-flowing waterway. The Operational Land Imager on the Landsat 8 satellite acquired this natural-color image of the Zambezi Delta on August 29, 2013. Sandbars and barrier spits stretch across the mouths of the delta, and suspended sediment extends tens of kilometers out into the sea. The sandy outflow turns the coastal waters to a milky blue-green compared to the deep blue of open water in the Indian Ocean. The Zambezi Delta includes 230 kilometers of coastline fronting 18,000 square kilometers (7,00 square miles) of swamps, floodplains, and even savannahs (inland). The area has long been prized by subsistence fishermen and farmers, who find fertile ground for crops like sugar and fertile waters for prawns and fish. Two species of endangered cranes and one of the largest concentration of buffalo in Africa -- among many other species of wildlife -- have found a haven in this internationally recognized wetland. However, the past six decades have brought great changes to the Zambezi Delta, which used to pour more water and sediment off of the continent. Hydropower dams upstream-most prominently, the Kariba and the Cahora Bassa-greatly reduce river flows during the wet season; they also trap sediments that would otherwise flow downstream. The result has been less water reaching the delta and the floodplains, which rely on pulses of nutrients and sediments from annual (and mostly benign) natural flooding. The change in the flow of the river affects freshwater availability and quality in the delta. Strong flows push fresh water further out into the sea and naturally keep most of a delta full of fresh (or mostly fresh) water. When that fresh flow eases, the wetlands become drier and more prone to fire. Salt water from the Indian Ocean also can penetrate further into the marsh, upsetting the ecological balance for aquatic plant and animal species. Researchers have found that the freshwater table in the delta has dropped as much as five meters in the 50 years since dams were placed on the river. Less river flow also affects the shape and extent of the delta. Today there is less sediment replenishing the marshes and beaches as they are scoured by ocean waves and tides. "What strikes me in this image is the suspended sediment offshore," said Liviu Giosan, a delta geologist at the Woods Hole Oceanographic Institution. "Sediment appears to be transferred from the delta offshore in plumes that not only originate in active river mouths but also from deactivated former mouths, now tidal channels. This shows the power of tidal scouring contributing to the slow but relentless erosion of the delta." http://photojournal.jpl.nasa.gov/catalog/PIA18155

  4. 75 FR 12686 - Drawbridge Operation Regulation; Bullards Ferry Bridge, Coquille River, Bandon, OR

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-17

    ... mile 3.5 near Bandon, Oregon so that the vertical lift span will not need to open for ten months while... near Bandon, Oregon, including the vertical lift towers, while it is being painted. By keeping the... authorize closures of this duration. However, the vertical lift span of this bridge has not been requested...

  5. Geologic map of the Masters 7.5' quadrangle, Weld and Morgan Counties, Colorado

    USGS Publications Warehouse

    Berry, Margaret E.; Slate, Janet L.; Paces, James B.; Hanson, Paul R.; Brandt, Theodore R.

    2015-09-28

    The Masters 7.5' quadrangle is located along the South Platte River corridor on the semiarid plains of eastern Colorado and contains surficial deposits that record alluvial, eolian, and hillslope processes that have operated in concert with environmental changes from Pleistocene to present time. The South Platte River, originating high in the Colorado Front Range, has played a major role in shaping the surficial geology of the quadrangle, which is situated downstream of where the last of the major headwater tributaries (St. Vrain, Big Thompson, and Cache la Poudre) join the river. Recurrent glaciation (and deglaciation) of basin headwaters affected river discharge and sediment supply far downstream, influencing deposition of alluvium and terrace formation in the Masters quadrangle. Kiowa and Bijou Creeks, unglaciated tributaries originating in the Colorado Piedmont east of the Front Range and joining the South Platte River just downstream of the Masters quadrangle, also have played a major role by periodically delivering large volumes of sediment to the river during flood events, which may have temporarily dammed the river. Eolian sand deposits of the Greeley (north of river) and Fort Morgan (south of river) dune fields cover much of the quadrangle and record past episodes of sand mobilization during times of prolonged drought. With the onset of irrigation and damming during historical times, the South Platte River has changed from a broad, shallow sandy braided river with highly seasonal discharge to a much narrower, deeper river with braided-meandering transition morphology and more uniform discharge. Along the reach of river in the Masters quadrangle, the river has incised into Upper Cretaceous Pierre Shale, which, although buried by alluvial deposits here, is locally exposed downstream along the South Platte River bluff near the Bijou Creek confluence, in some of the larger draws, and along Wildcat Creek.

  6. More than 100 Years of Background-Level Sedimentary Metals, Nisqually River Delta, South Puget Sound, Washington

    USGS Publications Warehouse

    Takesue, Renee K.; Swarzenski, Peter W.

    2011-01-01

    The Nisqually River Delta is located about 25 km south of the Tacoma Narrows in the southern reach of Puget Sound. Delta evolution is controlled by sedimentation from the Nisqually River and erosion by strong tidal currents that may reach 0.95 m/s in the Nisqually Reach. The Nisqually River flows 116 km from the Cascade Range, including the slopes of Mount Rainier, through glacially carved valleys to Puget Sound. Extensive tidal flats on the delta consist of late-Holocene silty and sandy strata from normal river streamflow and seasonal floods and possibly from distal sediment-rich debris flows associated with volcanic and seismic events. In the early 1900s, dikes and levees were constructed around Nisqually Delta salt marshes, and the reclaimed land was used for agriculture and pasture. In 1974, U.S. Fish and Wildlife Service established the Nisqually National Wildlife Refuge on the reclaimed land to protect migratory birds; its creation has prevented further human alteration of the Delta and estuary. In October 2009, original dikes and levees were removed to restore tidal exchange to almost 3 km2 of man-made freshwater marsh on the Nisqually Delta.

  7. UNIDENTIFIED CATENARY SUSPENSION BRIDGE ON RIVETED METAL PIERS, SHOWING HOWE ...

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

    UNIDENTIFIED CATENARY SUSPENSION BRIDGE ON RIVETED METAL PIERS, SHOWING HOWE PIPE TRUSS RAILING AND TRUSSED DECK BEAMS TYPICAL TO BRIDGES BUILT BY FLINN-MOYER COMPANY. TRIPODAL PIPE TOWERS RESEMBLE CLEAR FORK OF THE BRAZOS SUSPENSION BRIDGE’S TOWERS PRIOR TO ENCASEMENT IN CONCRETE. NOTE COLLAPSED TRUSS IN RIVER. ELEVATION VIEW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  8. Yatesville Lake, Big Sandy River Basin, Blaine Creek, Kentucky. Foundation Report. Construction of Dam and Appurtenant Works, Phase 2. Volume 1

    DTIC Science & Technology

    1990-09-01

    and grouting were performed from the rock surface using expandable-air packers . Grouting was performed by injecting, into a hole, a neat grout ( cement ...Water & cement type I & II Mix: ........................... 6:1 to 0.75:1 Connection: .................... Air packer , close to surface...pressure tested then backfilled. The holes were hydraulic-pressure tested with a single air- expanding packer near the surface at 5 psi gauge pressure. If

  9. Differences in impacts of Hurricane Sandy on freshwater swamps on the Delmarva Peninsula, Mid−Atlantic Coast, USA

    USGS Publications Warehouse

    Middleton, Beth A.

    2016-01-01

    Hurricane wind and surge may have different influences on the subsequent composition of forests. During Hurricane Sandy, while damaging winds were highest near landfall in New Jersey, inundation occurred along the entire eastern seaboard from Georgia to Maine. In this study, a comparison of damage from salinity intrusion vs. wind/surge was recorded in swamps of the Delmarva Peninsula along the Pocomoke (MD) and Nanticoke (DE) Rivers, south of the most intense wind damage. Hickory Point Cypress Swamp (Hickory) was closest to the Chesapeake Bay and may have been subjected to a salinity surge as evidenced by elevated salinity levels at a gage upstream of this swamp (storm salinity = 13.1 ppt at Nassawango Creek, Snow Hill, Maryland). After Hurricane Sandy, 8% of the standing trees died at Hickory including Acer rubrum, Amelanchier laevis, Ilex spp., and Taxodium distichum. In Plot 2 of Hickory, 25% of the standing trees were dead, and soil salinity levels were the highest recorded in the study. The most important variables related to structural tree damage were soil salinity and proximity to the Atlantic coast as based on Stepwise Regression and NMDS procedures. Wind damage was mostly restricted to broken branches although tipped−up trees were found at Hickory, Whiton and Porter (species: Liquidamabar styraciflua, Pinus taeda, Populus deltoides, Quercus pagoda and Ilex spp.). These trees fell mostly in an east or east−southeast direction (88o−107o) in keeping with the wind direction of Hurricane Sandy on the Delmarva Peninsula. Coastal restoration and management can be informed by the specific differences in hurricane damage to vegetation by salt versus wind.

  10. 77 FR 57026 - Drawbridge Operation Regulation; Black Warrior River, AL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-17

    ... Coast Railroad (AGR) vertical lift span (Yo- Yo) bridge across the Black Warrior River, mile 219.0, at... notice and opportunity to comment pursuant to authority under section 4(a) of the Administrative... bridge is automated. The bridge is commonly referred to as the ``Yo-Yo'' bridge because of the automated...

  11. 78 FR 47242 - Drawbridge Operation Regulation; Umpqua River, Reedsport, OR

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-05

    ... the openings to twice daily; once in the morning and once in the evening. DATES: Comments and related... opening is requested at least six hours in advance. The U.S. 101 Umpqua River Bridge is a swing span... examined bridge opening logs and contacted all waterway users that have requested bridge openings...

  12. 11. DETAIL VIEW OF BRIDGE DATEPLATE AT SOUTHEAST CORNER OF ...

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

    11. DETAIL VIEW OF BRIDGE DATEPLATE AT SOUTHEAST CORNER OF BRIDGE WHICH READS 'NORTH FORK OF WHITE RIVER, VINCENNES STEEL CORP., CONTRACTOR, ARKANSAS STATE HIGHWAY COMMISSION AND THE UNITED STATES BUREAU OF PUBLIC ROADS, 1936' - North Fork Bridge, Spans North Fork of White River at State Highway 5, Norfork, Baxter County, AR

  13. 33 CFR 117.943 - Cumberland River.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Clarksville Railroad bridge over the Cumberland River, mile 126.5, at Clarksville, shall open on signal when the vertical clearance under the navigational span is 47 feet or less. The draw shall open on signal if at least two hours notice is given when the vertical clearance is greater than 47 feet. The draw...

  14. 33 CFR 117.943 - Cumberland River.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Clarksville Railroad bridge over the Cumberland River, mile 126.5, at Clarksville, shall open on signal when the vertical clearance under the navigational span is 47 feet or less. The draw shall open on signal if at least two hours notice is given when the vertical clearance is greater than 47 feet. The draw...

  15. 33 CFR 117.943 - Cumberland River.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Clarksville Railroad bridge over the Cumberland River, mile 126.5, at Clarksville, shall open on signal when the vertical clearance under the navigational span is 47 feet or less. The draw shall open on signal if at least two hours notice is given when the vertical clearance is greater than 47 feet. The draw...

  16. 33 CFR 117.943 - Cumberland River.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Clarksville Railroad bridge over the Cumberland River, mile 126.5, at Clarksville, shall open on signal when the vertical clearance under the navigational span is 47 feet or less. The draw shall open on signal if at least two hours notice is given when the vertical clearance is greater than 47 feet. The draw...

  17. Economic benefits of additional rail bridge capacity: a case study on the benefits of replacing the Merchants Bridge main spans at Saint Louis.

    DOT National Transportation Integrated Search

    2015-11-01

    The Merchants Memorial Mississippi Rail Bridge and MacArthur Bridge over the Mississippi River make up the most heavily : used Mississippi River rail crossing in the country. A large contributor to the popularity of the Merchants Bridge is its : acce...

  18. 78 FR 44881 - Drawbridge Operation Regulation; York River, Between Yorktown and Gloucester Point, VA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-25

    ... deviation from the operating schedule that governs the operation of the Coleman Memorial Bridge (US 17/George P. Coleman Memorial Swing Bridge) across the York River, mile 7.0, between Gloucester Point and Yorktown, VA. This deviation is necessary to facilitate maintenance work on the moveable spans on the...

  19. 3. CONTEXTUAL VIEW OF BRIDGE IN SETTING, LOOKING SOUTHWEST FROM ...

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

    3. CONTEXTUAL VIEW OF BRIDGE IN SETTING, LOOKING SOUTHWEST FROM ELEVATED GRADE OF EUREKA SOUTHERN RAILROAD. EUREKA SOUTHERN TRUSS BRIDGE AT EXTREME LEFT, 1924 HIGHWAY BRIDGE IN CENTER, 1952 HIGHWAY BRIDGE AT RIGHT - Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 101, Alton, Humboldt County, CA

  20. 19. Wayne Chandler, Photographer, August 1993 Photographic copy of Xerox ...

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

    19. Wayne Chandler, Photographer, August 1993 Photographic copy of Xerox copy of original plans, dated 1932, by Wisconsin Highway Commission. Xerox copy in possession of Westbrook Associated Engineers, Spring Green, Wisconsin. DETAILS FOR PIERS NO. 1, 2, 5 & 6. - Chippewa River Bridge, Spanning Chippewa River at State Highway 35, Nelson, Buffalo County, WI

  1. 15. Wayne Chandler, Photographer, August 1993 Photographic copy of Xerox ...

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

    15. Wayne Chandler, Photographer, August 1993 Photographic copy of Xerox copy of original plans, dated 1932, by Wisconsin Highway Commission. Xerox copy in possession of Westbrook Associated Engineers, Spring Green, Wisconsin. GENERAL PLAN AND ELEVATION OF BRIDGE. - Chippewa River Bridge, Spanning Chippewa River at State Highway 35, Nelson, Buffalo County, WI

  2. 18. NORTH SIDE OF CONTROL ROOM SHOWING MAIN ELECTRIC PANEL ...

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

    18. NORTH SIDE OF CONTROL ROOM SHOWING MAIN ELECTRIC PANEL ON LEFT, SIGNAL SWITCH BOX IN CENTER, AND SIGNAL RELAYS ON RIGHT. RESISTOR BANK BEHIND ON RIGHT. BRIDGE TENDER'S DESK BEHIND ON SOUTH SIDE. (Fred Small) - Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR

  3. Annual Coded Wire Tag Program; Oregon Missing Production Groups, 1997 Annual Report.

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Lewis, Mark A.; Mallette, Christine; Murray, William M.

    1998-03-01

    This annual report is in fulfillment of contract obligations with Bonneville Power Administration which is the funding source for the Oregon Department of Fish and Wildlife's Annual Coded Wire Tag Program - Oregon Missing Production Groups Project. Tule stock fall chinook were caught primarily in British Columbia and Washington ocean, and Oregon freshwater fisheries. Up-river bright stock fall chinook contributed primarily to Alaska and British Columbia ocean commercial, and Columbia River gillnet and other freshwater fisheries. Contribution of Rogue stock fall chinook released in the lower Columbia River occurred primarily in Oregon ocean commercial and Columbia river gillnet fisheries. Willamettemore » stock spring chinook contributed primarily to Alaska and British Columbia ocean commercial, Oregon freshwater sport and Columbia River gillnet fisheries. Willamette stock spring chinook released by CEDC contributed to similar ocean fisheries, but had much higher catch in gillnet fisheries than the same stocks released in the Willamette system. Up-river stocks of spring chinook contributed almost exclusively to Columbia River sport fisheries and other freshwater recovery areas. The up-river stocks of Columbia River summer steelhead contributed primarily to the Columbia River gillnet and other freshwater fisheries. Coho ocean fisheries from Washington to California were closed or very limited from 1994 through 1997 (1991 through 1994 broods). This has resulted in a greater average percent of catch for other fishery areas. Coho stocks released by ODFW below Bonneville Dam contributed mainly to Oregon and Washington ocean, Columbia Gillnet and other freshwater fisheries. Coho stocks released in the Klaskanine River and Youngs Bay area had similar ocean catch, but much higher contribution to gillnet fisheries than the other coho releases. Coho stocks released above Bonneville Dam had similar contribution to ocean fisheries as other coho releases. However, they contributed more to gillnet fisheries above Bonneville Dam than coho released below the dam. Survival rates of salmon and steelhead are influenced, not only by factors in the hatchery (disease, density, diet, size and time of release) but also by environmental factors in the river and ocean. These environmental factors are influenced by large scale weather patterns such as El Nino over which man has no influence. Changes in rearing conditions in the hatchery, over which man has some influence, do impact the survival rates. However, these impacts can be offset by impacts caused by environmental factors. Coho salmon released in the Columbia River generally experience better survival rates when released later in the spring. However, for the 1990 brood year June releases of Columbia River coho had much lower survival than May releases, for all ODFW hatcheries. In general survival of ODFW Columbia River hatchery coho has declined to low levels since the 1989 brood year. In an effort to evaluate photonic marking as a tool to mass mark salmonids, two groups of 1995 brood juvenile coho salmon were marked at Sandy Hatchery. The first group (Group A) received a fluorescent red mark, adipose fin clip and coded-wire tag. The second group (Group B) received a cryptic blue mark, adipose fin clip and coded-wire tag. Both groups were released in the spring of 1997. No photonic marks were detected in the precocious males (jacks) returning to Sandy hatchery in the fall of 1997.« less

  4. Fate of Arsenic during Red River Water Infiltration into Aquifers beneath Hanoi, Vietnam

    PubMed Central

    2016-01-01

    Recharge of Red River water into arsenic-contaminated aquifers below Hanoi was investigated. The groundwater age at 40 m depth in the aquifer underlying the river was 1.3 ± 0.8 years, determined by tritium–helium dating. This corresponds to a vertical flow rate into the aquifer of 19 m/year. Electrical conductivity and partial pressure of CO2 (PCO2) indicate that water recharged from the river is present in both the sandy Holocene and gravelly Pleistocene aquifers and is also abstracted by the pumping station. Infiltrating river water becomes anoxic in the uppermost aquifer due to the oxidation of dissolved organic carbon. Further downward, sedimentary carbon oxidation causes the reduction of As-containing Fe-oxides. Because the release of arsenic by reduction of Fe-oxides is controlled by the reaction rate, arsenic entering the solution becomes highly diluted in the high water flux and contributes little to the groundwater arsenic concentration. Instead, the As concentration in the groundwater of up to 1 μM is due to equilibrium-controlled desorption of arsenic, adsorbed to the sediment before river water started to infiltrate due to municipal pumping. Calculations indicate that it will take several decades of river water infiltration to leach arsenic from the Holocene aquifer to below the World Health Organization limit of 10 μg/L. PMID:27958705

  5. Fate of Arsenic during Red River Water Infiltration into Aquifers beneath Hanoi, Vietnam.

    PubMed

    Postma, Dieke; Mai, Nguyen Thi Hoa; Lan, Vi Mai; Trang, Pham Thi Kim; Sø, Helle Ugilt; Nhan, Pham Quy; Larsen, Flemming; Viet, Pham Hung; Jakobsen, Rasmus

    2017-01-17

    Recharge of Red River water into arsenic-contaminated aquifers below Hanoi was investigated. The groundwater age at 40 m depth in the aquifer underlying the river was 1.3 ± 0.8 years, determined by tritium-helium dating. This corresponds to a vertical flow rate into the aquifer of 19 m/year. Electrical conductivity and partial pressure of CO 2 (P CO 2 ) indicate that water recharged from the river is present in both the sandy Holocene and gravelly Pleistocene aquifers and is also abstracted by the pumping station. Infiltrating river water becomes anoxic in the uppermost aquifer due to the oxidation of dissolved organic carbon. Further downward, sedimentary carbon oxidation causes the reduction of As-containing Fe-oxides. Because the release of arsenic by reduction of Fe-oxides is controlled by the reaction rate, arsenic entering the solution becomes highly diluted in the high water flux and contributes little to the groundwater arsenic concentration. Instead, the As concentration in the groundwater of up to 1 μM is due to equilibrium-controlled desorption of arsenic, adsorbed to the sediment before river water started to infiltrate due to municipal pumping. Calculations indicate that it will take several decades of river water infiltration to leach arsenic from the Holocene aquifer to below the World Health Organization limit of 10 μg/L.

  6. 16. (4'X5' image enlarged from 2 1/4' negative) Sam Fowler, ...

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

    16. (4'X5' image enlarged from 2 1/4' negative) Sam Fowler, Photographer, February 1998 VIEW OF GEORGIA DOT BRIDGE NO. 051-00025D-01986N (JAMES P. HOULIHAN BRIDGE). DETAIL OF TURN-SPAN MECHANISM. - Georgia DOT Bridge No. 051-00025D-01986N, US 17 & State Route 25 Spanning Savannah River, Port Wentworth, Chatham County, GA

  7. 17. (4"X5" image enlarged from 2 1/4" negative) Sam Fowler, ...

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

    17. (4"X5" image enlarged from 2 1/4" negative) Sam Fowler, Photographer, February 1998 VIEW OF GEORGIA DOT BRIDGE NO. 051-00025D-01986N (JAMES P. HOULIHAN BRIDGE) APPROACH SPAN FENDER - Georgia DOT Bridge No. 051-00025D-01986N, US 17 & State Route 25 Spanning Savannah River, Port Wentworth, Chatham County, GA

  8. 14. (4"X5" image enlarged from 2 1/4" negative) Sam Fowler, ...

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

    14. (4"X5" image enlarged from 2 1/4" negative) Sam Fowler, Photographer, February 1998 VIEW OF GEORGIA DOT BRIDGE NO. 051-00025D-01986N (JAMES P. HOULIHAN BRIDGE) TURN-SPAN AND LOCKING MECHANISM - Georgia DOT Bridge No. 051-00025D-01986N, US 17 & State Route 25 Spanning Savannah River, Port Wentworth, Chatham County, GA

  9. 77 FR 24147 - Drawbridge Operation Regulation; Mile 359.4, Missouri River, Kansas City, MO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-23

    ... eight wire rope lifting cables that operate the lift span. This deviation allows the bridge to remain in the closed position while the lift cables are replaced. DATES: This deviation is effective from 10 p.m... cables that operate the lift span are replaced. The closure period will start at 10 p.m. on or about May...

  10. 77 FR 28488 - Drawbridge Operation Regulation; Upper Mississippi River, Hannibal, MO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-15

    ... lifting cables that operate the lift span. This deviation allows the bridge to remain in the closed position while the lift cables are replaced. DATES: This deviation is effective from 9 a.m. to 3 p.m. on or... wire rope lifting cables that operate the lift span are replaced. The closure period will be from 9 a.m...

  11. Geologic map of the Orchard 7.5' quadrangle, Morgan County, Colorado

    USGS Publications Warehouse

    Berry, Margaret E.; Slate, Janet L.; Hanson, Paul R.; Brandt, Theodore R.

    2015-01-01

    The Orchard 7.5' quadrangle is located along the South Platte River corridor on the semi-arid plains of eastern Colorado, and contains surficial deposits that record alluvial, eolian, and hillslope processes that have operated through environmental changes from the Pleistocene to the present. The South Platte River, originating high in the Colorado Front Range, has played a major role in shaping the geology of the quadrangle, which is situated downstream of where the last of the major headwater tributaries (St. Vrain, Big Thompson, and Cache la Poudre) join the river. Recurrent glaciation (and deglaciation) of basin headwaters affected river discharge and sediment supply far downstream, influencing alluvium deposition and terrace formation in the Orchard quadrangle. Kiowa and Bijou Creeks, unglaciated tributaries originating east of the Front Range also have played a major role by periodically delivering large volumes of sediment to the river during flood events, which may have temporarily dammed the river. Eolian sand deposits of the Greeley (north of river) and Fort Morgan (south of river) dune fields cover much of the quadrangle and record past episodes of sand mobilization during times of drought. With the onset of irrigation during historic times, the South Platte River has changed from a broad, shallow, and sandy braided river with highly seasonal discharge to a much narrower, deeper river with braided-meandering transition morphology and more uniform discharge. Along this reach, the river has incised into Upper Cretaceous Pierre Shale, which, although buried by alluvial deposits in Orchard quadrangle, is locally exposed downstream along the South Platte River bluff near the Bijou Creek confluence, in some of the larger draws, and along Wildcat Creek.

  12. Distribution of selenium, molybdenum and uranium in sediment cores from the Colorado River delta, Baja California, Mexico.

    PubMed

    Orozco-Durán, A; Daesslé, L W; Gutiérrez-Galindo, E A; Muñoz-Barbosa, A

    2012-01-01

    The distribution of selenium, molybdenum and uranium was studied in ~1.5 m sediment cores from the Colorado River delta, at the Colorado (CR) and Hardy (HR) riverbeds. Core HR2 showed highest Se, Mo and U concentrations at its bottom (2.3, 0.95 and 1.8 μg g(-1)) within a sandy-silt layer deposited prior to dam construction. In CR5 the highest concentrations of these elements (0.9, 1.4 and 1.7 μg g(-1) respectively) were located at the top of the core within a surface layer enriched in organic carbon. A few samples from HR2 had Se above the probable toxic effect level guidelines.

  13. 15. STRESS SHEET. American Bridge Company, New York Office, 30 ...

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

    15. STRESS SHEET. American Bridge Company, New York Office, 30 Church Street, sheet no. C516, dated March 12, 1928, approved March 16, 1928, order no. F5073. For U.S. Steel Products Company, Pacific Coast Depot. For Southern Pacific Company, Pacific Lines, 1st crossing, Napa River, near Napa, Western Division, customer's order no. 8873-P-28746. Various scales. - Napa River Railroad Bridge, Spanning Napa River, east of Soscol Avenue, Napa, Napa County, CA

  14. Photographic copy of circa, 1934 black and white photograph. Loose ...

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

    Photographic copy of circa, 1934 black and white photograph. Loose in oversized box located at the National Museum of American History, Smithsonian Institution, Archives Center, Work and Industry Division, Washington, D.C. Original Photographer unknown. VIEW FROM EAST BANK LOOKING SOUTH TOWARD WEST BANK AT BRIDGE UNDER CONSTRUCTION SHOWING COMPLETED THROUGH TRUSS SPAN BETWEEN PIER III AND IV AND THE UNCOMPLETED DECK TRUSS SPAN BETWEEN PIER IV AND V. - Huey P. Long Bridge, Spanning Mississippi River approximately midway between nine & twelve mile points upstream from & west of New Orleans, Jefferson, Jefferson Parish, LA

  15. Designing the Alluvial Riverbeds in Curved Paths

    NASA Astrophysics Data System (ADS)

    Macura, Viliam; Škrinár, Andrej; Štefunková, Zuzana; Muchová, Zlatica; Majorošová, Martina

    2017-10-01

    The paper presents the method of determining the shape of the riverbed in curves of the watercourse, which is based on the method of Ikeda (1975) developed for a slightly curved path in sandy riverbed. Regulated rivers have essentially slightly and smoothly curved paths; therefore, this methodology provides the appropriate basis for river restoration. Based on the research in the experimental reach of the Holeška Brook and several alluvial mountain streams the methodology was adjusted. The method also takes into account other important characteristics of bottom material - the shape and orientation of the particles, settling velocity and drag coefficients. Thus, the method is mainly meant for the natural sand-gravel material, which is heterogeneous and the particle shape of the bottom material is very different from spherical. The calculation of the river channel in the curved path provides the basis for the design of optimal habitat, but also for the design of foundations of armouring of the bankside of the channel. The input data is adapted to the conditions of design practice.

  16. Flood-plain delineation for Occoquan River, Wolf Run, Sandy Run, Elk Horn Run, Giles Run, Kanes Creek, Racoon Creek, and Thompson Creek, Fairfax County, Virginia

    USGS Publications Warehouse

    Soule, Pat LeRoy

    1978-01-01

    Water-surface profiles of the 25-, 50-, and 100-year recurrence interval discharges have been computed for all streams and reaches of channels in Fairfax County, Virginia, having a drainage area greater than 1 square mile except for Dogue Creek, Little Hunting Creek, and that portion of Cameron Run above Lake Barcroft. Maps having a 2-foot contour interval and a horizontal scale of 1 inch equals 100 feet were used for base on which flood boundaries were delineated for 25-, 50-, and 100-year floods to be expected in each basin under ultimate development conditions. This report is one of a series and presents a discussion of techniques employed in computing discharges and profiles as well as the flood profiles and maps on which flood boundaries have been delineated for the Occoquan River and its tributaries within Fairfax County and those streams on Mason Neck within Fairfax County tributary to the Potomac River. (Woodard-USGS)

  17. Stream-sediment geochemistry in mining-impacted streams : sediment mobilized by floods in the Coeur d'Alene-Spokane River system, Idaho and Washington

    USGS Publications Warehouse

    Box, Stephen E.; Bookstrom, Arthur A.; Ikramuddin, Mohammed

    2005-01-01

    Environmental problems associated with the dispersion of metal-enriched sediment into the Coeur d'Alene-Spokane River system downstream from the Coeur d'Alene Mining District in northern Idaho have been a cause of litigation since 1903, 18 years after the initiation of mining for lead, zinc, and silver. Although direct dumping of waste materials into the river by active mining operations stopped in 1968, metal-enriched sediment continues to be mobilized during times of high runoff and deposited on valley flood plains and in Coeur d'Alene Lake (Horowitz and others, 1993). To gauge the geographic and temporal variations in the metal contents of flood sediment and to provide constraints on the sources and processes responsible for those variations, we collected samples of suspended sediment and overbank deposits during and after four high-flow events in 1995, 1996, and 1997 in the Coeur d'Alene-Spokane River system with estimated recurrence intervals ranging from 2 to 100 years. Suspended sediment enriched in lead, zinc, silver, antimony, arsenic, cadmium, and copper was detected over a distance of more than 130 mi (the downstream extent of sampling) downstream of the mining district. Strong correlations of all these elements in suspended sediment with each other and with iron and manganese are apparent when samples are grouped by reach (tributaries to the South Fork of the Coeur d'Alene River, the South Fork of the Coeur d'Alene River, the main stem of the Coeur d'Alene River, and the Spokane River). Elemental correlations with iron and manganese, along with observations by scanning electron microscopy, indicate that most of the trace metals are associated with Fe and Mn oxyhydroxide compounds. Changes in elemental correlations by reach suggest that the sources of metal-enriched sediment change along the length of the drainage. Metal contents of suspended sediment generally increase through the mining district along the South Fork of the Coeur d'Alene River, decrease below the confluence of the North and South Forks, and then increase again downstream of the gradient flattening below Cataldo. Metal contents of suspended sediment in the Spokane River below Coeur d'Alene Lake were comparable to those of suspended sediment in the main stem of the Coeur d'Alene River above the lake during the 1997 spring runoff, but with somewhat higher Zn contents. Daily suspended-sediment loads were about 100 times larger in the 1996 flood (50-100-year recurrence interval) than in the smaller 1997 floods (2-5-year recurrence intervals). Significant differences in metal ratios and contents are also apparent between the two flood types. The predominant source of suspended sediment in the larger 1996 flood was previously deposited, metal-enriched flood-plain sediment, identified by its Zn/Pb ratio less than 1. Suspended sediment in the smaller 1997 floods had metal ratios distinct from those of the flood-plain deposits and was primarily derived from metal-enriched sediment stored within the stream channel, identified by a Zn/Pb ratio greater than 1. Sediment deposited during overbank flooding on the immediate streambank or natural levee of the river typically consists of sandy material with metal ratios and contents similar to those of the sandy streambed sediment in the adjacent river reach. Samples of overbank deposits in backlevee marshes collected after the 1996 flood have metal ratios similar to those of peak-flow suspended sediment in the same river reach, but generally lower metal contents.

  18. 18. Photocopy of photograph of WalpoleWestminster bridge at high water ...

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

    18. Photocopy of photograph of Walpole-Westminster bridge at high water during flood of November, 1927; photograph from Walpole Historical Society scrapbook collection. View west: Walpole approach (railroad station and store) and Connecticut River at flood stage, November, 1927. - Walpole-Westminster Bridge, Spanning Connecticut River between Walpole, NH & Westminster, VT, Walpole, Cheshire County, NH

  19. Composite action in a steel girder span with precast deck panels : the I-81 bridge over the New River in Radford, Virginia.

    DOT National Transportation Integrated Search

    2003-01-01

    Two parallel bridges carry I-81 north and south over the New River in southwest Virginia, near the city of Radford. The bridges are identical in design and have been in place since 1985. In recent years, a number of maintenance issues have been repor...

  20. 19. VIEW SOUTHWEST OF INTERMEDIATE VERTICAL PENNSYLVANIA PETIT TRUSS WITH ...

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

    19. VIEW SOUTHWEST OF INTERMEDIATE VERTICAL PENNSYLVANIA PETIT TRUSS WITH CASTLE ROCK IN BACKGROUND. JUNCTION OF INTERMEDIATE VERTICAL AND TOP CHORD WITH STABILIZING LATERAL STRUT ABOVE AND SWAY STRUT BELOW. ORIGINAL PAIRED DIAGONAL EYE BARS LATER REINFORCED WITH TIE ROD - New River Bridge, Spanning New River at State Route 623, Pembroke, Giles County, VA

Some links on this page may take you to non-federal websites. Their policies may differ from this site.
Top