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1

25. ROAD VIEW ON NEWTON DRURY PARKWAY. HUMBOLDT COUNTY, CALIFORNIA. ...  

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

25. ROAD VIEW ON NEWTON DRURY PARKWAY. HUMBOLDT COUNTY, CALIFORNIA. LOOKING NW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

2

10. ROAD VIEW. SOUTH OF PIERCY, HUMBOLDT COUNTY, CALIFORNIA. OLD ...  

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

10. ROAD VIEW. SOUTH OF PIERCY, HUMBOLDT COUNTY, CALIFORNIA. OLD HIGHWAY ON LEFT. NEW HIGHWAY ON RIGHT. LOOKING W. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

3

17. BENBOW INN. SOUTH OF GARBERVILLE, HUMBOLDT COUNTY, CALIFORNIA. LOOKING ...  

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

17. BENBOW INN. SOUTH OF GARBERVILLE, HUMBOLDT COUNTY, CALIFORNIA. LOOKING NW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

4

11. ROAD VIEW. SOUTH OF PIERCY, HUMBOLDT COUNTY, CALIFORNIA. OLD ...  

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

11. ROAD VIEW. SOUTH OF PIERCY, HUMBOLDT COUNTY, CALIFORNIA. OLD HIGHWAY ON LEFT. NEW HIGHWAY ON RIGHT. LOOKING SW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

5

5. TUNNEL TREE AT DRIVETHROUGHTREE PARK. LEGGETT, HUMBOLDT COUNTY, CALIFORNIA. ...  

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

5. TUNNEL TREE AT DRIVE-THROUGH-TREE PARK. LEGGETT, HUMBOLDT COUNTY, CALIFORNIA. LOOKING NE. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

6

Geology of Tompkins Hill gas field, Humboldt County, California  

SciTech Connect

The Tompkins Hill gas field, located in Humboldt County, California, is the only producing field in the Eel River basin. The field is an anticlinal flexure on the north limb of the Eel River syncline in the central onshore portion of the basin. The Tompkins Hill anticline is doubly plunging and trends east-west. Stratigraphic units present in the field include the Yager, Eel River, and Rio Dell Formations and Scotia Bluffs Sandstone. The Yager occurs below a major unconformity, and forms economic basement. Strata overlying the Eel River, Rio Dell, and Scotia Bluffs represent a progradational basin-fill sequence, including submarine fan, slope, shelf, and littoral deposits. The primary productive interval in the field is within the middle of the Rio Dell and consists of interbedded fine sandstone and mudrock. Portions of the Eel River and upper Rio Dell Formations are also productive. The Tompkins Hill gas field was discovered by the Texas Company in 1937 with the drilling of Eureka 2 in Sec. 22, T3N, R1W. The play was probably based on outcrop mapping and the presence of gas seeps in the area. The primary trapping mechanism in the field is structural, although stratigraphy may have been a factor in constraining gas. To date, 39 producing wells have been drilled and 87.4 bcf of gas, consisting of 98% methane, has been produced. Very minor amounts of condensate are also produced. The source rocks for the gas are uncertain, but both the Yager Formation and strata of the lower Wildcat Group may have contributed.

Parker, J.

1988-03-01

7

Earthquake and Tsunami planning, outreach and awareness in Humboldt County, California  

NASA Astrophysics Data System (ADS)

Humboldt County has the longest coastline in California and is one of the most seismically active areas of the state. It is at risk from earthquakes located on and offshore and from tsunamis generated locally from faults associated with the Cascadia subduction zone (CSZ), other regional fault systems, and from distant sources elsewhere in the Pacific. In 1995 the California Division of Mines and Geology published the first earthquake scenario to include both strong ground shaking effects and a tsunami. As a result of the scenario, the Redwood Coast Tsunami Work Group (RCTWG), an organization of representatives from government agencies, tribes, service groups, academia and the private sector from the three northern coastal California counties, was formed in 1996 to coordinate and promote earthquake and tsunami hazard awareness and mitigation. The RCTWG and its member agencies have sponsored a variety of projects including education/outreach products and programs, tsunami hazard mapping, signage and siren planning, and has sponsored an Earthquake - Tsunami Education Room at the Humboldt County fair for the past eleven years. Three editions of Living on Shaky Ground an earthquake-tsunami preparedness magazine for California's North Coast, have been published since 1993 and a fourth is due to be published in fall 2008. In 2007, Humboldt County was the first region in the country to participate in a tsunami training exercise at FEMA's Emergency Management Institute in Emmitsburg, MD and the first area in California to conduct a full-scale tsunami evacuation drill. The County has conducted numerous multi-agency, multi-discipline coordinated exercises using county-wide tsunami response plan. Two Humboldt County communities were recognized as TsunamiReady by the National Weather Service in 2007. Over 300 tsunami hazard zone signs have been posted in Humboldt County since March 2008. Six assessment surveys from 1993 to 2006 have tracked preparedness actions and personal awareness of earthquake and tsunami hazards in the county and additional surveys have tracked public awareness and tourist concerns about tsunami hazard signs. Over the thirteen year period covered by the surveys, the percent with houses secured to foundations has increased from 58 to 80 percent, respondents aware of a local tsunami hazard increased from 51 to 73 percent and knowing what the Cascadia subduction zone is from 16 to 42 percent.

Ozaki, V.; Nicolini, T.; Larkin, D.; Dengler, L.

2008-12-01

8

GIS based Relative Tsunami Hazard Maps for Northern California, Humboldt and Del Norte Counties  

NASA Astrophysics Data System (ADS)

Tsunami hazard maps are generated using a geographical information systems (GIS) approach to depict the relative tsunami hazard of coastal Humboldt and Del Norte Counties in northern California. Maps are composed for the Humboldt Bay, Eel River, and Crescent City regions and available online at http://www.humboldt.edu/~geodept/earthquakes/rctwg/toc.html . In contrast to previous mapping efforts that utilize a single line to represent inundation, hazard is displayed gradationally. A 2.5D surface is constructed to represent this hazard. Elevation, normally used for 2.5D surfaces, is substituted with hazard units. Criteria boundaries are used to separate regions of increasing hazard. Criteria boundaries are defined based on numerical modeling, paleoseismic studies, historical flooding, FEMA Q3 flood maps, and impacts of recent tsunamis elsewhere. Zones are constructed to further adjust the criteria with respect to a physically determined variable hazard (e.g. proximity to open ocean). A triangular irregular network (TIN) is constructed using hazard criteria boundaries as breaklines. Fabricated points are necessary to construct a hazard surface and are placed where criteria boundaries diverge or where hazard is nonlinear between criteria boundaries. Hazard is displayed as a continuous gradational color scale ranging from red (high hazard) through orange (medium), yellow (low) to gray (no hazard). The maps are GIS based to facilitate ready adaptation by planners and emergency managers. The maps are intended for educational purposes, to improve awareness of tsunami hazards and to encourage emergency planning efforts of local and regional organizations by illustrating the range of possible tsunami events.

Patton, J. R.; Dengler, L. A.

2004-12-01

9

19. OLD HIGHWAY 101 AND ROAD VIEW. MIRANDA, HUMBOLDT COUNTY, ...  

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

19. OLD HIGHWAY 101 AND ROAD VIEW. MIRANDA, HUMBOLDT COUNTY, CALIFORNIA. LOOKING NW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

10

24. ROAD VIEW AT PRAIRE CREEK STATE PARK. HUMBOLDT COUNTY, ...  

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

24. ROAD VIEW AT PRAIRE CREEK STATE PARK. HUMBOLDT COUNTY, CALIFORNIA. LOOKING N. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

11

15. HIGHWAY 101 BRIDGE IN RICHARDSON STATE PARK. HUMBOLDT COUNTY, ...  

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

15. HIGHWAY 101 BRIDGE IN RICHARDSON STATE PARK. HUMBOLDT COUNTY, CALIFORNIA. LOOKING N. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

12

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

13

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

14

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

15

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

16

6. ABANDONED OLD HIGHWAY 101. NORTH OF LEGGETT, HUMBOLDT COUNTY, ...  

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

6. ABANDONED OLD HIGHWAY 101. NORTH OF LEGGETT, HUMBOLDT COUNTY, CALIFORNIA. NOTE CANTILEVERED DECKING. NEW HIGHWAY 101 AND BRIDGE SEEN AT CENTER REAR. LOOKING N. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

17

7. ABANDONED OLD HIGHWAY 101. NORTH OF LEGGETT. HUMBOLDT COUNTY, ...  

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

7. ABANDONED OLD HIGHWAY 101. NORTH OF LEGGETT. HUMBOLDT COUNTY, CALIFORNIA. NOTE CANTILEVERED DECKING. SOUTH FORK OF EEL RIVER AT LEFT. LOOKING SW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

18

50. Photographer unknown Date unknown HUMBOLDT COUNTY, SECTION A, HIGHWAY ...  

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

50. Photographer unknown Date unknown HUMBOLDT COUNTY, SECTION A, HIGHWAY 1. ABANDONED PORTION OF HIGHWAY RECONSTRUCTED 1935 ACROSS RIVER CONNECTING WITH NEW SMITH PT. BR., 1-HUM-1A #203. Stamped office copy. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

19

Humboldt County General Plan Update Health Impact Assessment: A Case Study  

Microsoft Academic Search

As a tool for deliberately planning for and optimizing the ways in which we design our environments, Health Impact Assessment (HIA) holds promise for achieving environmental justice and health equity. This case study describes the application of HIA to updating a rural county's General Plan. Humboldt County, California is currently considering three development plans to accommodate future population growth, and

E. Celia Harris; Ann Lindsay; Jonathan C. Heller; Kim Gilhuly; Melanie Williams; Brian Cox; Jennifer Rice

2009-01-01

20

57. G.M.W., photographer March 26, 1940 HUMBOLDT COUNTY, SECTION K, ...  

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

57. G.M.W., photographer March 26, 1940 HUMBOLDT COUNTY, SECTION K, HIGHWAY 1. HUM-1-K #93, STA. 255, 3-26-40, G.M.W. Stamped office copy. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

21

Aquatic biology of the Redwood Creek and Mill Creek drainage basins, Redwood National Park, Humboldt and Del Norte counties, California  

USGS Publications Warehouse

A 2-year study of the aquatic biota in the Redwood Creek and Mill Creek drainage basins of Redwood National Park indicated that the aquatic productivity is low. Densities of coliform bacteria were low except in Prairie Creek, a tributary to Redwood Creek, where a State park, county fish hatchery, grazing land, lumber mill, and scattered residential areas are potential sources of fecal coliform bacteria. Benthic invertebrate data indicated a diverse fauna which varied considerably between streams and among stream sections. Noteworthy findings include: (1) benthic invertebrates rapidly recolonized the streambed following a major storm, and (2) man-caused disruption or sedimentation of the streambed during low flow can result in drastic reductions of the benthic invertebrate community. Seven species of fish representing species typically found in northern California coastal streams were captured during the study. Nonparametric statistical tests indicate that condition factors of steelhead trout were significantly larger at sampling stations with more insolation, regardless of drainage basin land-use history. Periphyton and phytoplankton communities were diverse, variable in numbers, and dominated by diatoms. Seston concentrations were extremely variable between stations and at each station sampled. The seston is influenced seasonally by aquatic productivity at each station and amount of allochthonous material from the terrestrial ecosystem. Time-series analysis of some seston data indicated larger and sharper peak concentrations being flushed from the logged drainage basin than from the control drainage basin. (USGS)

Iwatsubo, Rick T.; Averett, R.C.

1981-01-01

22

78 FR 21964 - Sheldon National Wildlife Refuge Humboldt and Washoe Counties, NV, and Lake County, OR; Record of...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Wildlife Refuge Humboldt and Washoe Counties, NV, and Lake County...remote area of northwest Nevada and southeast Oregon...ssquf] Humboldt County Public Library, 85 East...Winnemucca, NV. [ssquf] Washoe County Public Library,...

2013-04-12

23

Digital Geologic Map of the Redding 1° x 2° Quadrangle, Shasta, Tehama, Humboldt, and Trinity Counties, California  

USGS Publications Warehouse

The Redding 1° x 2 quadrangle in northwestern California transects the Franciscan Complex and southern Klamath Mountains province as well as parts of the Great Valley Complex, northern Great Valley, and southernmost Cascades volcanic province. The tectonostratigraphic terranes of the Klamath province represent slices of oceanic crust, island arcs, and overlying sediment that range largely from Paleozoic to Jurassic in age. The Eastern Klamath terrane forms the nucleus to which the other terranes were added westward, primarily during Jurassic time, and that package was probably accreted to North America during earliest Cretaceous time. The younger Franciscan Complex consists of a sequence of westward younging tectonostratigraphic terranes of late Jurassic to Miocene age that were accreted to North America from mid-Cretaceous through Miocene time, with the easternmost being the most strongly metamorphosed. The marine Great Valley sequence, of late Jurassic and Cretaceous age, was deposited unconformably across the southernmost Klamath rocks, but in turn was underthrust at its western margin by Eastern belt Franciscan rocks. Pliocene and Quaternary volcanic rocks and sediment of the Cascades province extend into the southeastern part of the quadrangle, abutting the northernmost part of the great central valley of California. This map and database represent a digital rendition of Open-File Report 87-257, 1987, by L.A. Fraticelli, J.P. Albers, W.P. Irwin, and M.C. Blake, Jr., with various improvements and additions.

Fraticelli, Luis A.; Albers, John P.; Irwin, William P.; Blake, Milton C., Jr.; Wentworth, Carl M.

2012-01-01

24

55. E.M.C., photographer July 3, 1936 HUMBOLDT COUNTY, SECTION J, ...  

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

55. E.M.C., photographer July 3, 1936 HUMBOLDT COUNTY, SECTION J, HIGHWAY 1. 1-HUM-I-J #80, BITUMULS PORTION OF EXPERIMENTAL SECTION, E.M.C, 7-3-36. BACK READS: C/PROCESSING STABILIZING BITUMULS WITH BLADE AFTER BEING PROCESSED WITH SPRING TOOTH HARROW. Stamped office copy. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

25

Virgin Valley opal district, Humboldt County, Nevada  

USGS Publications Warehouse

The Virgin Valley opal district, Humboldt County, Nevada, is near the Oregon-Nevada border in the Sheldon Game Refuge. Nineteen claims owned by Jack and Toni Crane were examined, sampled, and tested radiometrically for uranium. Numerous discontinuous layers of opal are interbedded with a gently-dipping series of vitric tuff and ash which is at least 300 ft thick. The tuff and ash are capped by a dark, vesicular basalt in the eastern part of the area and by a thin layer of terrace qravels in the area along the west side of Virgin Valley. Silicification of the ash and tuff has produced a rock that ranges from partly opalized rock that resembles silicified shale to completely altered rock that is entirely translucent, and consists of massive, brown and pale-green opal. Carnotite, the only identified uranium mineral, occurs as fracture coatings or fine layers in the opal; in places, no uranium minerals are visible in the radioactive opal. The opal layers are irregular in extent and thickness. The exposed length of the layers ranges from 8 to 1, 200 ft or more, and the thickness of the layers ranges from 0. 1 to 3. 9 ft. The uranium content of each opal layer, and of different parts of the same layer, differs widely. On the east side of Virgin Valley four of the seven observed opal layers, nos. 3, 4, 5, and 7, are more radioactive than the average; and the uranium content ranges from 0. 002 to 0. 12 percent. Two samples, taken 5 ft apart across opal layer no. 7, contained 0. 003 and 0. -049 percent uranium. On the west side of the valley only four of the fifteen observed opal layers, nos; 9, , 10, 14, and 15, are more radioactive than the average; and the uranium content ranges from 0. 004 to 0. 047 percent. Material of the highest grade was found in a small discontinuous layer of pale-green opal (no. 4) on the east side of Virgin Valley. The grade of this layer ranged from 0. 027 to 0. 12 percent uranium.

Staatz, Mortimer Hay; Bauer, Herman L., Jr.

1951-01-01

26

70 FR 29272 - Humboldt-Toiyabe National Forest; California and Nevada; Great Basin South Rangeland Project...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Humboldt-Toiyabe National Forest; California and Nevada; Great Basin South Rangeland...Analysis AGENCY: Forest Service, USDA...Street, Carson City, Nevada 89701...Humboldt-Toiyabe National Forest, is proposing...000 acre Great Basin South area...

2005-05-20

27

A Study of Youth Attitudes Toward Authority and Their Relation to School Adjustment Patterns. A Report Prepared by the 1973-74 Humboldt County Grand Jury, June 1974.  

ERIC Educational Resources Information Center

The Humboldt County Grand Jury (1973-74) examined the attitudes of high school youths toward law enforcement in the California county. Since these are sensitive indicators of their attitudes toward authority in general, results should not be interpreted as being exclusively relevant to law enforcement. The study covered a 4 month period, sampling…

Bowlus, Donald; And Others

28

23. MADISON GRANT TABLET AT PRAIRIE CREEK STATE PARK. HUMBOLDT ...  

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

23. MADISON GRANT TABLET AT PRAIRIE CREEK STATE PARK. HUMBOLDT COUNTY, CALIFORNIA. LOOKING W. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

29

North Coast Journal | Humboldt County, California Marketplace  

E-print Network

Special Publications Search News Music Art+Film Food Outdoors Calendar Blog Extras field notes / By Barry evening of June 25, 1178 (our calendar), the likes of which has never been seen since: "A marvelous, somewhere. Yet none of the astronomical records from the time -- European, Chinese, Arabic, Japanese

Withers, Paul

30

Blue Mountain, Humboldt County, Nevada, U.S.A  

SciTech Connect

The report documents the drilling of well Deep Blue No.2, the second deep geothermal test hole at the Blue Mountain Geothermal Area, Humboldt County, Nevada. The well was drilled by Noramex Corp, a Nevada company, with funding support from the US Department of Energy, under the DOE’s GRED II Program. Deep Blue No.2 was drilled as a ‘step-out’ hole from Deep Blue No.1, to further evaluate the commercial potential of the geothermal resource. Deep Blue No.2 was designed as a vertical, slim observation test hole to a nominal target depth of 1000 meters (nominal 3400 feet). The well tests an area of projected high temperatures at depth, from temperature gradients measured in a group of shallow drill holes located approximately one kilometer to the northeast of observation hole Deep Blue No.1. The well is not intended for, or designed as, a commercial well or a production well. Deep Blue No.2 was spudded on March 25, 2004 and completed to a total depth of 1127.76m (3700 ft) on April 28, 2004. The well was drilled using conventional rotary drilling techniques to a depth of 201.17 m (660 ft), and continuously cored from 201.17m (660 ft) to 1127.76m (3700 ft). A brief rig-on flow-test was conducted at completion to determine basic reservoir parameters and obtain fluid samples. A permeable fracture zone with measured temperatures of 150 to 167°C (302 to 333°F) occurs between 500 to 750m (1640 to 2461ft). The well was left un-lined in anticipation of the Phase III - Flow and Injection Testing. A further Kuster temperature survey was attempted after the well had been shut in for almost 3 weeks. The well appears to have bridged off at 439m (1440ft) as the Kuster tool was unable to descend past this point. Several attempts to dislodge the obstruction using tube jars were unsuccessful. Deep Blue No.2 encountered variably fractured and veined, fine-grained rocks of the Singas Formation, and intruded by minor strongly altered fine-grained felsic dikes, and less altered fineto medium-grained felsic to intermediate dikes. Widespread open fractures and extensive of quartz veining in many intervals of the core indicate a high degree of fracturing and flow of silica-bearing fluids, almost certainly hotter than 200°C (392°F), at some time, but these fractures are now partially sealed. Intervals of soft shaly mudstone, common clay gouge, and rocks with generally low permeability (few veins and fractures) may also form a seal or ‘cap’ above the main high temperature reservoir at Blue Mountain. The encouraging results from Deep Blue No.2 support further drilling at Blue Mountain. Higher temperature fluids can be expected where fractures providing channels for the circulation of hot water from depth have not been sealed extensively by silica deposition.

Ted Fitzpatrick, Brian D. Fairbank

2005-04-01

31

77 FR 67391 - Notice of Proposed Supplementary Rules on Public Land in Water Canyon, Humboldt County, NV  

Federal Register 2010, 2011, 2012, 2013, 2014

...Proposed Supplementary Rules on Public Land in Water Canyon, Humboldt County, NV AGENCY...and resources on public land within the Water Canyon Recreation Area. These proposed...restrictions included within the decisions of the Water Canyon Recreation Area Management...

2012-11-09

32

33 CFR 165.1195 - Regulated Navigation Area; Humboldt Bay Bar Channel and Humboldt Bay Entrance Channel, Humboldt...  

Code of Federal Regulations, 2012 CFR

...Bay Entrance Channel, Humboldt Bay, California. 165.1195 Section 165.1195...Bay Entrance Channel, Humboldt Bay, California. (a) Location. The Regulated...Bay Entrance Channel, Humboldt Bay, California. (b) Definitions. As used in...

2012-07-01

33

33 CFR 165.1195 - Regulated Navigation Area; Humboldt Bay Bar Channel and Humboldt Bay Entrance Channel, Humboldt...  

Code of Federal Regulations, 2011 CFR

...Bay Entrance Channel, Humboldt Bay, California. 165.1195 Section 165.1195...Bay Entrance Channel, Humboldt Bay, California. (a) Location. The Regulated...Bay Entrance Channel, Humboldt Bay, California. (b) Definitions. As used in...

2011-07-01

34

33 CFR 165.1195 - Regulated Navigation Area; Humboldt Bay Bar Channel and Humboldt Bay Entrance Channel, Humboldt...  

Code of Federal Regulations, 2010 CFR

...Bay Entrance Channel, Humboldt Bay, California. 165.1195 Section 165.1195...Bay Entrance Channel, Humboldt Bay, California. (a) Location. The Regulated...Bay Entrance Channel, Humboldt Bay, California. (b) Definitions. As used in...

2010-07-01

35

33 CFR 165.1195 - Regulated Navigation Area; Humboldt Bay Bar Channel and Humboldt Bay Entrance Channel, Humboldt...  

Code of Federal Regulations, 2013 CFR

...Bay Entrance Channel, Humboldt Bay, California. 165.1195 Section 165.1195...Bay Entrance Channel, Humboldt Bay, California. (a) Location. The Regulated...Bay Entrance Channel, Humboldt Bay, California. (b) Definitions. As used in...

2013-07-01

36

33 CFR 165.1195 - Regulated Navigation Area; Humboldt Bay Bar Channel and Humboldt Bay Entrance Channel, Humboldt...  

Code of Federal Regulations, 2014 CFR

...Bay Entrance Channel, Humboldt Bay, California. 165.1195 Section 165.1195...Bay Entrance Channel, Humboldt Bay, California. (a) Location. The Regulated...Bay Entrance Channel, Humboldt Bay, California. (b) Definitions. As used in...

2014-07-01

37

Fault Trace: Marin County, California  

NSDL National Science Digital Library

This photograph shows the trace of a fault (in trench phase) as it passes beneath a barn. The trace developed during the April 18, 1906 San Francisco Earthquake. The location is the Skinner Ranch, near Olema, Marin County, California.

38

Documentation of model input and output values for simulation of pumping effects in Paradise Valley, a basin tributary to the Humboldt River, Humboldt County, Nevada  

USGS Publications Warehouse

Documentation is provided of model input and sample output used in a previous report for analysis of ground-water flow and simulated pumping scenarios in Paradise Valley, Humboldt County, Nevada.Documentation includes files containing input values and listings of sample output. The files, in American International Standard Code for Information Interchange (ASCII) or binary format, are compressed and put on a 3-1/2-inch diskette. The decompressed files require approximately 8.4 megabytes of disk space on an International Business Machine (IBM)- compatible microcomputer using the MicroSoft Disk Operating System (MS-DOS) operating system version 5.0 or greater.

Carey, A.E.; Prudic, D.E.

1996-01-01

39

THE MISSING EARTHQUAKES OF HUMBOLDT COUNTY: RECONCILING RECURRENCE INTERVAL ESTIMATES, SOUTHERN CASCADIA SUBDUCTION ZONE  

NASA Astrophysics Data System (ADS)

Earthquake and tsunami hazard for northwestern California and southern Oregon is predominately based on estimates of recurrence for earthquakes on the Cascadia subduction zone and upper plate thrust faults, each with unique deformation and recurrence histories. Coastal northern California is uniquely located to enable us to distinguish these different sources of seismic hazard as the accretionary prism extends on land in this region. This region experiences ground deformation from rupture of upper plate thrust faults like the Little Salmon fault. Most of this region is thought to be above the locked zone of the megathrust, so is subject to vertical deformation during the earthquake cycle. Secondary evidence of earthquake history is found here in the form of marsh soils that coseismically subside and commonly are overlain by estuarine mud and rarely tsunami sand. It is not currently known what the source of the subsidence is for this region; it may be due to upper plate rupture, megathrust rupture, or a combination of the two. Given that many earlier investigations utilized bulk peat for 14C age determinations and that these early studies were largely reconnaissance work, these studies need to be reevaluated. Recurrence Interval estimates are inconsistent when comparing terrestrial (~500 years) and marine (~220 years) data sets. This inconsistency may be due to 1) different sources of archival bias in marine and terrestrial data sets and/or 2) different sources of deformation. Factors controlling successful archiving of paleoseismic data are considered as this relates to geologic setting and how that might change through time. We compile, evaluate, and rank existing paleoseismic data in order to prioritize future paleoseismic investigations. 14C ages are recalibrated and quality assessments are made for each age determination. We then evaluate geologic setting and prioritize important research locations and goals based on these existing data. Terrestrial core transects are located in each of eight archival domains in order to evaluate archival bias and potential deformation sources for the southern Cascadia subduction zone. These domains are located in the Eel River, Humboldt Bay, Humboldt Lagoons, and Crescent City regions. In any given domain, evidence of earthquakes can be regional, local, or both. Core transects are designed to capture archival bias due to 1) interseismic deformation in the upper plate or the megathrust, 2) rupture on upper plate thrust faults, 3) rupture on the megathrust, or 4) rupture on both. Modern biogeochemical transects are used to calibrate paleontologic estimates. Based on our assessment, we determine which sites need better age control, which sites need supplemental coring, and key new research areas that need to be investigated.

Patton, J. R.; Leroy, T. H.

2009-12-01

40

78 FR 43827 - Irish Potatoes Grown in Modoc and Siskiyou Counties, California, and in All Counties in Oregon...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Siskiyou Counties, California, and in All Counties in Oregon, Except Malheur County...Siskiyou Counties, California, and in all counties in Oregon, except Malheur County...at: http://www.regulations.gov. All comments submitted in response to this...

2013-07-22

41

COUNTIES OF CALIFORNIA - WITH FARM STATISTICS  

EPA Science Inventory

County farming statistics polygon coverage of California. The statistics were taken from the 1997 Census of Agriculture and added to a coverage extracted from TIGER county boundaries. A farm is any place from which $1,000 or more of agricultural products were sold, or normally w...

42

CONFIRMATORY SURVEY OF THE FUEL OIL TANK AREA HUMBOLDT BAY POWER PLANT EUREKA, CALIFORNIA  

SciTech Connect

During the period of February 14 to 15, 2012, ORISE performed radiological confirmatory survey activities for the former Fuel Oil Tank Area (FOTA) and additional radiological surveys of portions of the Humboldt Bay Power Plant site in Eureka, California. The radiological survey results demonstrate that residual surface soil contamination was not present significantly above background levels within the FOTA. Therefore, it is ORISE’s opinion that the radiological conditions for the FOTA surveyed by ORISE are commensurate with the site release criteria for final status surveys as specified in PG&E’s Characterization Survey Planning Worksheet. In addition, the confirmatory results indicated that the ORISE FOTA survey unit Cs-137 mean concentrations results compared favorably with the PG&E FOTA Cs-137 mean concentration results, as determined by ORISE from the PG&E characterization data. The interlaboratory comparison analyses of the three soil samples analyzed by PG&E’s onsite laboratory and the ORISE laboratory indicated good agreement for the sample results and provided confidence in the PG&E analytical procedures and final status survey soil sample data reporting.

WADE C. ADAMS

2012-04-09

43

Geothermal study of the southwest part of the Black Rock Desert and its geothermal areas; Washoe, Pershing, and Humboldt Counties, Nevada  

Microsoft Academic Search

Several hydrothermal systems were explored in northwestern Nevada in parts of Washoe, Pershing, and Humboldt Counties. These hydrothermal systems included the Great Boiling springs and Mud springs at Gerlach, the Fly Ranch hot springs in Hualapai Flat, Double Hot and Black Rock springs at the southern end of the Black Rock Range, Trego hot spring, Soldier Meadows hot springs, and

1978-01-01

44

California County Data Book, 1994.  

ERIC Educational Resources Information Center

This data book examines statewide trends in the well-being of California's children. California is the only state where the majority of the children (56%) come from African-American, Latino, Asian, and Native American families. The report begins with summary tables of general state facts, including: (1) California's children under 18; (2)…

Children Now, Oakland, CA.

45

GENERAL SITE PLAN, HAMILTON AIR FORCE BASE, MARIN COUNTY, CALIFORNIA. ...  

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

GENERAL SITE PLAN, HAMILTON AIR FORCE BASE, MARIN COUNTY, CALIFORNIA. Pencil on paper, dated December 4, 1952. Also marked "PWC 103474." By J.Y. Long Company, Engineers, Oakland, California - Hamilton Field, East of Nave Drive, Novato, Marin County, CA

46

California County Data Book 1995.  

ERIC Educational Resources Information Center

This data book examines statewide trends in the well-being of California's children. The report begins with highlights of findings and focuses on teens in the areas of teen births and gun violence. The report then lists summary tables for the state for 17 indicators of child well being in the areas of: (1) family economics; (2) education; (3)…

Children Now, Oakland, CA.

47

DIURNAL AND NOCTURNAL ROOST SITE FIDELITY OF DUNLIN (CALIDRIS ALPINA PACIFICA) AT HUMBOLDT BAY, CALIFORNIA  

E-print Network

11 DIURNAL AND NOCTURNAL ROOST SITE FIDELITY OF DUNLIN (CALIDRIS ALPINA PACIFICA) AT HUMBOLDT BAY and nocturnal use of high-tide roosts by radiotagged Dunlin (Calidris alpina pacifica) wintering (November, accepted 14 June 2006. Key words: Calidris alpina pacifica, Dunlin, nocturnal, pasture, roosts, site

Colwell, Mark

48

DIURNAL AND NOCTURNAL ROOST SITE FIDELITY OF DUNLIN (CALIDRIS ALPINA PACIFICA) AT HUMBOLDT BAY, CALIFORNIA  

E-print Network

677 DIURNAL AND NOCTURNAL ROOST SITE FIDELITY OF DUNLIN (CALIDRIS ALPINA PACIFICA) AT HUMBOLDT BAY and nocturnal use of high-tide roosts by radiotagged Dunlin (Calidris alpina pacifica) wintering (November, accepted 14 June 2006. Key words: Calidris alpina pacifica, Dunlin, nocturnal, pasture, roosts, site

Colwell, Mark

49

Humboldt Bay Cooperative Eelgrass Project  

E-print Network

1992. The ecology of Humboldt Bay, California: an estuarineEstuarine Research Reserve, State of Washington Department of Ecology),ecological benefits. In most places, both species are afforded protection through estuary

Schlosser, Susan

2007-01-01

50

76 FR 71935 - Humboldt-Toiyabe National Forest, Carson Ranger District, Nevada and California, Bordertown to...  

Federal Register 2010, 2011, 2012, 2013, 2014

...kV terminals at California Substation. The majority of the route...Bordertown and California substations are being considered (Mitchell...issues, potential impacts, design/mitigation measures, and...Bordertown and California substations. Potential effects to...

2011-11-21

51

PESTICIDE OCCURRENCE IN GROUNDWATER IN TULARE COUNTY, CALIFORNIA  

E-print Network

on irrigated water. Residues of more than 50 pesticides were found in the groundwater of 23 California countiesPESTICIDE OCCURRENCE IN GROUNDWATER IN TULARE COUNTY, CALIFORNIA MINGHUA ZHANG1 , SHU GENG2 , SUSAN to identify the major factors affecting pesticide leaching in groundwater from agricultural fields in Tulare

Zhang, Minghua

52

Travertine Hot Springs, Mono County, California  

SciTech Connect

This article is an abridgement of Special Report 172, Travertine Hot Springs at Bridgeport, Mono County, California, in preparation at the California Division of Mines and Geology. The Travertine Hot Springs area is on the northern edge of what many consider to be one of the most tectonically active areas in the United States. There is abundant geothermal and seismic activity. The landscape is dotted with volcanic features- cones, craters, domes, flows, fumaroles and hot springs-indicators of unrest in the present as well as reminders of activity in the past. Travertine, also known as calcareous sinter, is limestone formed by chemical precipitation of calcium carbonate (CaCO{sub 3}) from ground or surface waters. It forms stalactites and stalagmites in caves, fills some veins and spring conduits and can also be found at the mouths of springs, especially hot springs. The less compact variety is called tufa and the dense, banded variety is known as Mexican onyx, or onyx marble. True onyx, however, is a banded silicate.

Chesterman, C.W.; Kleinhampl, F.J.

1991-08-01

53

The application of LANDSAT remote sensing technology to natural resources management. Section 1: Introduction to VICAR - Image classification module. Section 2: Forest resource assessment of Humboldt County.  

NASA Technical Reports Server (NTRS)

A teaching module on image classification procedures using the VICAR computer software package was developed to optimize the training benefits for users of the VICAR programs. The field test of the module is discussed. An intensive forest land inventory strategy was developed for Humboldt County. The results indicate that LANDSAT data can be computer classified to yield site specific forest resource information with high accuracy (82%). The "Douglas-fir 80%" category was found to cover approximately 21% of the county and "Mixed Conifer 80%" covering about 13%. The "Redwood 80%" resource category, which represented dense old growth trees as well as large second growth, comprised 4.0% of the total vegetation mosaic. Furthermore, the "Brush" and "Brush-Regeneration" categories were found to be a significant part of the vegetative community, with area estimates of 9.4 and 10.0%.

Fox, L., III (principal investigator); Mayer, K. E.

1980-01-01

54

California City and County Transient Occupancy Taxes Exemption  

E-print Network

California City and County Transient Occupancy Taxes Exemption According to G-28, Section VIII business are granted an exemption from the payment of occupancy taxes imposed by these cities or counties from the tax when checking in. The traveler may be required to complete an exemption certificate

California at Berkeley, University of

55

Evolution of a trench-slope basin within the Cascadia subduction margin: the Neogene Humboldt Basin, California  

USGS Publications Warehouse

The Neogene Humboldt (Eel River) Basin is located along the north-eastern margin of the Pacific Ocean within the Cascadia subduction zone. This sedimentary basin originated near the base of the accretionary prism in post-Eocene time. Subduction processes since that time have elevated strata in the south-eastern portion of the basin above sea level. High-resolution chronostratigraphic data from the onshore portion of the Humboldt Basin enable correlation of time-equivalent lithofacies across the palaeomargin, reconstruction of slope-basin evolution, and preliminary delineation of climatic and tectonic influence on lithological variation. -from Author

McCrory, P.A.

1995-01-01

56

33 CFR 334.1127 - Naval Base Ventura County, Port Hueneme, California; restricted area.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Naval Base Ventura County, Port Hueneme, California; restricted area. 334.1127 Section 334.1127 Navigation... § 334.1127 Naval Base Ventura County, Port Hueneme, California; restricted area. (a) The area. The waters within...

2011-07-01

57

33 CFR 334.1127 - Naval Base Ventura County, Port Hueneme, California; restricted area.  

Code of Federal Regulations, 2014 CFR

...2014-07-01 false Naval Base Ventura County, Port Hueneme, California; restricted area. 334.1127 Section 334.1127 Navigation... § 334.1127 Naval Base Ventura County, Port Hueneme, California; restricted area. (a) The area. The waters within...

2014-07-01

58

33 CFR 334.1127 - Naval Base Ventura County, Port Hueneme, California; restricted area.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Naval Base Ventura County, Port Hueneme, California; restricted area. 334.1127 Section 334.1127 Navigation... § 334.1127 Naval Base Ventura County, Port Hueneme, California; restricted area. (a) The area. The waters within...

2012-07-01

59

33 CFR 334.1127 - Naval Base Ventura County, Port Hueneme, California; restricted area.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Naval Base Ventura County, Port Hueneme, California; restricted area. 334.1127 Section 334.1127 Navigation... § 334.1127 Naval Base Ventura County, Port Hueneme, California; restricted area. (a) The area. The waters within...

2013-07-01

60

33 CFR 334.1127 - Naval Base Ventura County, Port Hueneme, California; restricted area.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Naval Base Ventura County, Port Hueneme, California; restricted area. 334.1127 Section 334.1127 Navigation... § 334.1127 Naval Base Ventura County, Port Hueneme, California; restricted area. (a) The area. The waters within...

2010-07-01

61

Groundwater quality in the Kern County Subbasin, California  

USGS Publications Warehouse

Groundwater provides more than 40 percent of California's drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project of the GAMA Program provides a comprehensive assessment of the State's groundwater quality and increases public access to groundwater-quality information. The Kern County Subbasin constitutes one of the study units being evaluated.

Burton, Carmen A.; Belitz, Kenneth

2012-01-01

62

76 FR 26224 - Revisions to the California State Implementation Plan, Northern Sonoma County Air Pollution...  

Federal Register 2010, 2011, 2012, 2013, 2014

...California State Implementation Plan, Northern Sonoma County Air Pollution Control District...proposing to approve revisions to the Northern Sonoma County Air Pollution Control District...addresses the following local rules: Northern Sonoma County Air Pollution Control...

2011-05-06

63

Bilingual Education Project, Santa Clara County, California. Final Report, 1972.  

ERIC Educational Resources Information Center

The Spanish Dame Bilingual Education Project, located in Santa Clara County, California, served 190 children who came from homes where the primary language was Spanish and who resided within the target area schools of the Alum Rock School District. The objectives of the preschool project were (1) to demonstrate a home-teaching procedure designed…

Santa Clara County Office of Education, San Jose, CA.

64

Diet and colon cancer in Los Angeles County, California  

Microsoft Academic Search

The diets of 746 colon cancer cases in Los Angeles County, California (USA) were compared with those of 746 controls matched on age, sex, race, and neighborhood. In both genders, total energy intake was associated with significantly increased risk, and calcium intake was associated with significantly decreased risk. These effects were reduced only slightly after adjustment for the nondietary risk

Ruth K. Peters; Malcolm C. Pike; David Garabrant; Thomas M. Mack

1992-01-01

65

The Hmong Resettlement Study Site Report: Orange County, California.  

ERIC Educational Resources Information Center

This document describes the resettlement of Hmong refugees in Orange County, California: what their employment experience has been, which resettlement efforts have been successful, and how current efforts could be altered to improve the Hmong's long term adjustment. The report is part of a larger, national project on Hmong resettlement. Much of…

Cohn, Mary; And Others

66

Composition and Distribution of Beach Debris in Orange County, California  

Microsoft Academic Search

Many studies have quantified debris collected on beaches around the world. Only a few of those studies have been conducted in the United States, and they are largely limited to semi-quantitative efforts performed as part of volunteer clean-up activities. This study quantifies the distribution and composition of beach debris by sampling 43 stratified random sites on the Orange County, California

Shelly L. Moore; Dominic Gregorio; Michael Carreon; Stephen B. Weisberg; Molly K. Leecaster

2001-01-01

67

Prevalence of pathogenic enteric bacteria in wild birds associated with agriculture in Humboldt County, California.  

E-print Network

??Cloacal and fecal samples of 243 wild birds, including 65 house sparrows (Passer domesticus), 29 white-crowned sparrows (Zonotrichia leucophrys), 16 Brewer’s blackbirds (Euphagus cyanocephalus), 43… (more)

Rogers, Krysta H.

2006-01-01

68

Taeniolite, an uncommon lithium-mica from Coyote Peak, Humboldt County, California.  

USGS Publications Warehouse

Taeniolite has been found in a late pegmatitic clot in a mafic alkalic diatreme at Coyote Peak; associated species are natrolite, pectolite, aegirine, barytolamprophyllite, rasvumite and sphalerite. The taeniolite is green-brown with sp. gr. (meas.) 2.85(1) and H. 31/2. Optically it is biaxial (-) with alpha 1.541(2), beta = gamma 1.570(2), 2V approx 0o and moderate pleochroism with gamma = beta reddish-brown, alpha pale greenish brown. Single-crystal precession photographs show it to be of the 1M type, with a 5.254(2), b 9.110(4), c 10.187(2) A, beta 99.85(4)o and V = 480.4(1) A3. Combined microprobe and ion probe analyses gave SiO2 53.5, Al2O3 3.00, TiO2 1.06, FeO 3.35, MnO 0.21, MgO 18.3, Li2O 2.4, K2O 11.3, Na2O 0.27, F 6.3 = 99.69; SrO and BaO are both <0.04 wt.%; B, Be, Ca and Cl were not detected. Assuming (F + OH) = 2 and assigning 1.30 wt.% H2O gives 409(K1.01Na0.04)(Al0.01Ti0.06Fe2+0.20Mn0.01Mg1.92Li0.68)(Si3.76Al0.24)O10- (F1.40OH0.60).-G.W.R.

Erd, R.C.; Czamanske, G.K.; Meyer, C.E.

1983-01-01

69

CONFIRMATORY SURVEY RESULTS FOR PORTIONS OF THE MATERIALS AND EQUIPMENT FROM UNITS 1 AND 2 AT THE HUMBOLDT BAY POWER PLANT, EUREKA, CALIFORNIA  

SciTech Connect

The Pacific Gas & Electric Company (PG&E) operated the Humboldt Bay Power Plant (HBPP) Unit 3 nuclear reactor near Eureka, California under Atomic Energy Commission (AEC) provisional license number DPR-7. HBPP Unit 3 achieved initial criticality in February 1963 and began commercial operations in August 1963. Unit 3 was a natural circulation boiling water reactor with a direct-cycle design. This design eliminated the need for heat transfer loops and large containment structures. Also, the pressure suppression containment design permitted below-ground construction. Stainless steel fuel claddings were used from startup until cladding failures resulted in plant system contamination—zircaloy-clad fuel was used exclusively starting in 1965 eliminating cladding-related contamination. A number of spills and gaseous releases were reported during operations resulting in a range of mitigative activities (see ESI 2008 for details).

W.C. Adams

2011-04-01

70

Outdoor residential water use trends in Orange County, California  

NASA Astrophysics Data System (ADS)

Irrigation is required to maintain outdoor landscapes in semi-arid climates, such as in Orange County, California. Landscape water use efficiency is a priority in Orange County, as nearly half the water supply is imported and the region is vulnerable to water shortages. The purpose of this research is to determine whether single family household residents adjust landscape irrigation based on climate or income in Orange County. Specifically, the goals were to (1) estimate the volume of single family residence (SFR) landscape irrigation applied (2) determine the depth (mm) of over- or under-irrigation compared to theoretical need (3) determine the climatic and socioeconomic controls on landscape irrigation. We plan to compare results from agencies with uniform vs. allocation-based rate structures. A research partnership was established between six water retail agencies in Orange County: Huntington Beach Water District, El Toro Water District, Irvine Ranch Water District, East Orange County Water District, City of San Juan Capistrano, and Laguna Beach County Water District. These agencies represent a wide range of climatic and economic conditions and contributed between 3 and 13 years of SFR water use data on a monthly/bimonthly basis. Household water use, climate, and socioeconomic factors were mapped using Arcview GIS. Air temperature (California Irrigation Management Information System), precipitation (Orange County Cooperative Observer System), landscape size, and income (US Census) were evaluated as possible controls on SFR water use. Findings indicate that landscape water use may constitute the majority of household water use. We found over-irrigation relative to plant water demand in areas of Orange County. Domestic landscape water use may depend on climate and/or income. Results suggest a high potential for residential water savings with improved landscape irrigation efficiency. This information would be useful for improving or developing water use efficiency policies and educational programs.

Bijoor, N. S.; Famiglietti, J. S.; Berg, J.; Baum-Haley, M.

2012-12-01

71

33 CFR 334.1126 - Naval Base Ventura County, Point Mugu, California; restricted area.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Naval Base Ventura County, Point Mugu, California; restricted area. 334.1126 Section 334.1126 Navigation... § 334.1126 Naval Base Ventura County, Point Mugu, California; restricted area. (a) The area. The restricted area at Naval Base Ventura County...

2013-07-01

72

33 CFR 334.1126 - Naval Base Ventura County, Point Mugu, California; restricted area.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Naval Base Ventura County, Point Mugu, California; restricted area. 334.1126 Section 334.1126 Navigation... § 334.1126 Naval Base Ventura County, Point Mugu, California; restricted area. (a) The area. The restricted area at Naval Base Ventura County...

2010-07-01

73

33 CFR 334.1126 - Naval Base Ventura County, Point Mugu, California; restricted area.  

Code of Federal Regulations, 2014 CFR

...2014-07-01 false Naval Base Ventura County, Point Mugu, California; restricted area. 334.1126 Section 334.1126 Navigation... § 334.1126 Naval Base Ventura County, Point Mugu, California; restricted area. (a) The area. The restricted area at Naval Base Ventura County...

2014-07-01

74

33 CFR 334.1126 - Naval Base Ventura County, Point Mugu, California; restricted area.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Naval Base Ventura County, Point Mugu, California; restricted area. 334.1126 Section 334.1126 Navigation... § 334.1126 Naval Base Ventura County, Point Mugu, California; restricted area. (a) The area. The restricted area at Naval Base Ventura County...

2012-07-01

75

33 CFR 334.1126 - Naval Base Ventura County, Point Mugu, California; restricted area.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Naval Base Ventura County, Point Mugu, California; restricted area. 334.1126 Section 334.1126 Navigation... § 334.1126 Naval Base Ventura County, Point Mugu, California; restricted area. (a) The area. The restricted area at Naval Base Ventura County...

2011-07-01

76

Graphite deposits in Siskiyou County, California  

USGS Publications Warehouse

The graphite deposits examined are in sec. 7, T. 47 N., R. 11 W., Siskiyou County, Calif., on the summit of the Siskiyou Mts. between Elk Meadow and the northeast end of "mill 6220" (see map of the Seias quadrangle). Four claims, designated as the Black Jack Nos. 1, 2, 3, and 4 claims, and a five-acre mill site have been located by W. H. Gassaway, W. B. Stewart, and E. R. Stewart. Development consists of four small cuts and several shallow trenches.

Rynearson, Garn A.

1945-01-01

77

Mismatch Between Interseismic Ground Deformation and Paleoseismic/Paleogeodetic Observations, Humboldt Bay, Northern California, Cascadia Subduction Zone  

NASA Astrophysics Data System (ADS)

Observations made by Plafker in Chile (1960) and Alaska (1964) show that vertical deformation during earthquakes is generally opposite in sense of motion compared to interseismic deformation. This elastic rebound theory drives estimates of potential coseismic deformation on the Cascadia subduction zone (CSZ). Similar to other coastal marshes along the CSZ, paleoseismic investigations around Humboldt Bay reveal evidence of coseismic subsidence for the past 4 ka. Tide gage data obtained from NOAA tide gages, as well as 'campaign' style tide gages, are used to infer interseismic ground deformation. Tide gage data from Crescent City and Humboldt Bay are compared to each other and also compared to estimates of eustatic sea-level rise to estimate rates of land-level change. Earthscope and USGS GPS permanent site data are also used to evaluate vertical interseismic deformation in this region. These rates of land-level change are then compared to paleoseismic proxies for vertical land-level change. Cores collected for master's theses research at Humboldt State University were used to compile an earthquake history for the Humboldt Bay region. Some cores in Mad River and Hookton sloughs were used to evaluate magnitudes of coseismic subsidence by comparing diatom and foraminiferid assemblages associated with lithologic contacts (paleogeodesy). Minimum estimates of paleosubsidence for earthquakes range from 0.3 to 2.6 meters. Subtracting eustatic sea-level rise (~2.3 mm/yr, 1977-2010) from Crescent City (CC) and North Spit (NS) relative sea-level rates reveals that CC is uplifting at ~3mm/yr and NS is subsiding at ~2.5 mm/yr. GPS vertical deformation reveals similar rates of ~3 mm/yr of uplift and ~2 mm/yr of subsidence in these two locations. GPS based subsidence rates show a gradient of subsidence between Trinidad (in the north) to Cape Mendocino (in the south). The spatial region of ongoing subsidence reveals the depth of locking of the CSZ fault (differently from previous studies, like Wang et al., 2003), but Humboldt Bay has regions that subsided coseismically that are also subsiding interseismically. The sense of motion mismatch is probably due to at least (1) upper plate deformation (co- or inter-seismic) and/or (2) some process that is inconsistent with existing subduction zone models. Since the interseismic deformation is found across multiple upper-plate structures it is probably not influenced by those faults. However, coseismic motion on these faults cannot be ruled out. Future geodetic measurements may further reveal the region of locking on the megathrust (and provide a measure for natural hazards), but paleoseismic records and their paleogeodetic record likely better reveal the catastrophic changes we expect in the future as they are measures of coseismic changes.

Patton, J. R.; Williams, T. B.; Leroy, T. H.; Anderson, J. K.; Weldon, R. J.; Gilkerson, W.

2011-12-01

78

78 FR 58460 - Revision of Air Quality Implementation Plan; California; Placer County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Plan; California; Placer County Air Pollution Control District and Feather River...revision to the Placer County Air Pollution Control District (PCAPCD) and...modification of stationary sources of air pollution within each District. We...

2013-09-24

79

78 FR 12267 - Revision of Air Quality Implementation Plan; California; Placer County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Plan; California; Placer County Air Pollution Control District and Feather River...revision to the Placer County Air Pollution Control District (PCAPCD) and...modification of stationary sources of air pollution within each District. EPA...

2013-02-22

80

78 FR 23677 - Revisions to the California State Implementation Plan, Imperial County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Imperial County Air Pollution Control District AGENCY: Environmental...revisions to the Imperial County Air Pollution Control District (ICAPCD) portion...California including San Joaquin Valley Air Pollution Control District...

2013-04-22

81

65 FR 17480 - Northern Sierra Forest Plan Amendment EIS: Humboldt-Toiyabe National Forest, Stanislaus National...  

Federal Register 2010, 2011, 2012, 2013, 2014

...AGRICULTURE Forest Service Northern Sierra Forest Plan Amendment EIS: Humboldt-Toiyabe National Forest, Stanislaus National Forest, Lake Tahoe Basin Management Unit: Carson City, Douglas, and Washoe Counties,...

2000-04-03

82

Stable isotope tracers: natural and anthropogenic recharge, Orange County, California  

NASA Astrophysics Data System (ADS)

Stable isotopic techniques have been utilized to locate occurrences and trace movements of a variety of naturally and anthropogenically recharged waters in aquifers of Orange County, California. This basin is of particular interest not only because it provides the dominant water supply for the two million residents of this well-populated county, but also because it is representative of a common arid environment where natural recharge is dominated by distant, high-elevation precipitation transported by a major river. Such arid basins are particularly sensitive to climatic and anthropogenic disturbance of their recharge and their subsurface hydrology. In order to identify distinctive waters, oxygen and hydrogen stable isotope ratios from Orange County wells have been compared with a regional database including an array of surface water samples representative of watershed runoff. Four distinctive subsurface water types can be resolved. Waters of "local" rainfall and imported, "Colorado" River aqueduct origins are easily distinguished from dominant, "native" Santa Ana river compositions by use of hydrogen and oxygen stable isotope analysis. Recent human interference with Santa Ana river flow and recharge is also marginally resolvable by isotopic techniques. Distinguishable isotopic signatures of "recent" Santa Ana recharge appear to be due to evaporative loss, perhaps during storage in the Prado Reservoir or in percolation ponds, prior to recharge into Orange County aquifers. Characterization of traceable isotopic signatures of distinct natural and anthropogenic recharge components provides a major advance towards use of such techniques for developing a well constrained, three-dimensional hydrologic model for this complex basin.

Williams, Alan E.

1997-12-01

83

Composition and distribution of beach debris in Orange County, California.  

PubMed

Many studies have quantified debris collected on beaches around the world. Only a few of those studies have been conducted in the United States, and they are largely limited to semi-quantitative efforts performed as part of volunteer clean-up activities. This study quantifies the distribution and composition of beach debris by sampling 43 stratified random sites on the Orange County, California coast, from August to September 1998. We estimated that approximately 106 million items, weighing 12 metric tons, occur on Orange County beaches. The most abundant items were pre-production plastic pellets, foamed plastics, and hard plastics. Debris density on the remote rocky shoreline was greater than that on high-use sandy beaches for most debris items. This finding partially reflects the periodic clean-up of high-use beaches by local municipalities, and also indicates that a high percentage of the observed debris was transported to the site from waterborne sources. PMID:11381879

Moore, S L; Gregorio, D; Carreon, M; Weisberg, S B; Leecaster, M K

2001-03-01

84

Development of An Integrated Hydrologic Model in Yolo County, California  

NASA Astrophysics Data System (ADS)

To more efficiently use the Cache Creek flows and the groundwater basin as the sources of water supply and to restore the riparian ecosystem along the Cache Creek, Yolo County Flood Control and Water Conservation District (YCFCWCD) in Woodland, California plans to conduct the Cache Creek Groundwater Recharge and Recovery Program (CCGRRP). The concept of this program is to operate the groundwater basin to induce greater amounts of groundwater recharge from Cache Creek directly along the creek and to increase the recharge even further by diverting rainy season water at the District's Capay Diversion Dam into the West Adams Canal to a few recharge basins outside the active channel of Cache Creek. Besides the CCGRRP, cities of Woodland and Davis are in the process of conducting groundwater management plans, and the stakeholders in Yolo County developing a long-term integrated regional water management plan (IRWMP) for the entire county. To effectively evaluate the benefits and impacts of CCGRRP, local groundwater management plans, and the Yolo County IRWMP, the Integrated Groundwater and Surface water Model (IGSM) was applied to the Yolo groundwater basin. The IGSM is a comprehensive integrated hydrologic model that simulates both surface water and groundwater flow systems, including rainfall-runoff, soil moisture accounting and unsaturated flow, crop consumptive module, stream-aquifer interaction, and groundwater flow. The finite element code was originally developed in 1990 for the California Department of Water Resources and the State Water Resources Control Board. The IGSM code has subsequently been applied to more than 25 groundwater basins in California and other states. The model code has been peer reviewed and upgraded throughout its application to various projects, with the latest upgrade in 2004, as part of the application to the Stony Creek Fan area of Sacramento Valley. The Yolo County IGSM (YCIGSM) was calibrated against the historical (1970-2000) groundwater level records at 105 monitoring wells, and three streamflow gages along Cache Creek. Calibration results show that the YCIGSM is able to reasonably simulate the long-term groundwater level trends and short-term seasonal fluctuations. The YCIGSM will be used to develop operational guidelines to manage the groundwater basin, to determine the optimum yield of water projects, to identify benefits and impacts of projects on existing groundwater users, and to assess the environmental benefits and impacts during the development of projects, as well as during the environmental permitting process.

Liang, Y.; Taghavi, A.; Stevenson, M.; Najmus, S.

2006-12-01

85

Tar Creek study, Sargent oil field, Santa Clara County, California  

USGS Publications Warehouse

Field work in the Tar Creek area of Sargent oil field was performed June 26 to 28, 2000. The Santa Clara County study area is located in Sections, 30, 31, and 32, Township 11 South, Range 4 East, M.D.B&M; and in Sections 25 and 36, Township 11 South, Range 3 East, M.D.B.&M., north and south of Tar Creek, west of Highway 101. The work was a cooperative effort of the California Department of Conservation's Division of Oil, Gas, and Geothermal Resources (DOGGR), California Geological Survey (CGS), and the United States Geological Survey (USGS). The purpose of the project was to map the stratigraphy and geologic structure (David Wagner, CGS); sample oil for age dating (Les Magoon, USGS); and search for undocumented wells plus conduct a GPS survey of the area (Bill Fedasko, J.P. Carnahan, and Ross Brunetti, DOGGR)

Wagner, David L.; Fedasko, Bill; Carnahan, J.R.; Brunetti, Ross; Magoon, Leslie B.; Lillis, Paul G.; Lorenson, Thomas D.; Stanley, Richard G.

2002-01-01

86

California County Data Book 1997 [and] Report Card 1997. Challenges Ahead: Can Counties Make the Grade? A Children Now Report.  

ERIC Educational Resources Information Center

This Kids Count data book and report card examines statewide and county level trends in the well-being of California's children, with an additional focus on indicators of the new economic realities encountered by families as counties take on greater responsibility for local welfare programs. The statistical portrait is based on indicators in the…

Pine, Amy

87

76 FR 12306 - Revisions to the California State Implementation Plan, Imperial County, Kern County, and Ventura...  

Federal Register 2010, 2011, 2012, 2013, 2014

...County, and Ventura County; Air Pollution Control Districts AGENCY: Environmental...revisions to the Imperial County Air Pollution Control District (ICAPCD), Kern County Air Pollution Control District...

2011-03-07

88

76 FR 12280 - Revisions to the California State Implementation Plan, for Imperial County, Kern County, and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...County, and Ventura County; Air Pollution Control Districts AGENCY: Environmental...revisions to the Imperial County Air Pollution Control District (ICAPCD), Kern County Air Pollution Control District...

2011-03-07

89

Risk-Limiting Audits California AB 2023 Orange County, 2011 Audits: The After-Math of Elections  

E-print Network

Risk-Limiting Audits California AB 2023 Orange County, 2011 Audits: The After-Math of Elections Verification Network Conference Chicago, IL #12;Risk-Limiting Audits California AB 2023 Orange County, 2011 Outline Risk-Limiting Audits California AB 2023 Orange County, 2011 Matching ballots to CVRs Statutory

Stark, Philip B.

90

Combined climate- and prey-mediated range expansion of Humboldt squid (Dosidicus gigas), a large marine predator in the California Current System.  

PubMed

Climate-driven range shifts are ongoing in pelagic marine environments, and ecosystems must respond to combined effects of altered species distributions and environmental drivers. Hypoxic oxygen minimum zones (OMZs) in midwater environments are shoaling globally; this can affect distributions of species both geographically and vertically along with predator-prey dynamics. Humboldt (jumbo) squid (Dosidicus gigas) are highly migratory predators adapted to hypoxic conditions that may be deleterious to their competitors and predators. Consequently, OMZ shoaling may preferentially facilitate foraging opportunities for Humboldt squid. With two separate modeling approaches using unique, long-term data based on in situ observations of predator, prey, and environmental variables, our analyses suggest that Humboldt squid are indirectly affected by OMZ shoaling through effects on a primary food source, myctophid fishes. Our results suggest that this indirect linkage between hypoxia and foraging is an important driver of the ongoing range expansion of Humboldt squid in the northeastern Pacific Ocean. PMID:24443361

Stewart, Julia S; Hazen, Elliott L; Bograd, Steven J; Byrnes, Jarrett E K; Foley, David G; Gilly, William F; Robison, Bruce H; Field, John C

2014-06-01

91

Residential mobility and breast cancer in Marin County, California, USA.  

PubMed

Marin County (California, USA) has among the highest incidences of breast cancer in the U.S. A previously conducted case-control study found eight significant risk factors in participants enrolled from 1997-1999. These included being premenopausal, never using birth control pills, lower highest lifetime body mass index, having four or more mammograms from 1990-1994, beginning drinking alcohol after age 21, drinking an average two or more alcoholic drinks per day, being in the highest quartile of pack-years of cigarette smoking, and being raised in an organized religion. Previously conducted surveys provided residential histories; while statistic accounted for participants' residential mobility, and assessed clustering of breast cancer cases relative to controls based on the known risk factors. These identified specific cases, places, and times of excess breast cancer risk. Analysis found significant global clustering of cases localized to specific residential histories and times. Much of the observed clustering occurred among participants who immigrated to Marin County. However, persistent case-clustering of greater than fifteen years duration was also detected. Significant case-clustering among long-term residents may indicate geographically localized risk factors not accounted for in the study design, as well as uncertainty and incompleteness in the acquired addresses. Other plausible explanations include environmental risk factors and cases tending to settle in specific areas. A biologically plausible exposure or risk factor has yet to be identified. PMID:24366047

Jacquez, Geoffrey M; Barlow, Janice; Rommel, Robert; Kaufmann, Andy; Rienti, Michael; AvRuskin, Gillian; Rasul, Jawaid

2014-01-01

92

EPIZOOTIOLOGICAL FEATURES OF AVIAN CHOLERA ON THE NORTH COAST OF CALIFORNIA  

Microsoft Academic Search

An avian cholera (Pasteurella multocida) epizootic was observed among wildfowl at the Centerville Gun Club, Humboldt County, California (USA) in January 1978. Compared to their live populations and use of the area, coots (Fulica americana) died in proportionately greater numbers than any other species. Coots collected by gunshot were evaluated for sex and age composition, and morphometry from November 1977

JGregory Mensik; Richard G. Botzler

93

77 FR 72968 - Revisions to the California State Implementation Plan, for Imperial County, Placer County and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Placer County and Ventura County Air Pollution Control Districts AGENCY: Environmental...revisions to the Imperial County Air Pollution Control District (ICAPCD), Placer County Air Pollution Control District (PCAPCD)...

2012-12-07

94

77 FR 73005 - Revisions to the California State Implementation Plan, Imperial County, Placer County, and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Placer County, and Ventura County Air Pollution Control Districts AGENCY: Environmental...revisions to the Imperial County Air Pollution Control District (ICAPCD), Placer County Air Pollution Control District (PCAPCD)...

2012-12-07

95

Cooling rates and crystallization dynamics of shallow level pegmatite-aplite dikes, San Diego County, California  

Microsoft Academic Search

Pegmatites of the Pala and Mesa Grande Pegmatite Districts, San Diego County, California are typically thin, sheet-like composite pegmatite-aplite dikes. Aplitic portions of many dikes display pro- nounced mineralogical layering referred to as \\

KAREN L. WEBBER; WILLIAM B. SIMMONS; ALEXANDER U. FALSTER; EUGENE E. FOORD

1999-01-01

96

The environment of deposition of the Oligocene Burbank sandstone, Tulare Lake field, Kings County, California  

E-print Network

THE ENVIRONMENT OF DEPOSITION OF THE OLIGOCENE BURBANK SANDSTONE, TULARE LAKE FIELD, KINGS COUNTY, CALIFORNIA A Thesis by WILLIAM HAACK GOULET Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE DECEMBER 1986 Major Subject: Geology THE ENVIRONMENT OF DEPOSITION OF THE OLIGOCENE BURBANK SANDSTONE, TULARE LAKE PIELD, KINGS COUNTY, CALIFORNIA A Thesis by WILLIAM HAACK GODLET Approved as to style...

Goulet, William Haack

2012-06-07

97

Characterization of a sandstone reservoir using seismic methods: Yowlumne Field, Kern County, California  

E-print Network

CHARACTERIZATION OF A SANDSTONE RESERVOIR USING SEISMIC METHODS: YOWLUMNE FIELD, KERN COUNTY, CALIFORNIA A Thesis by RODRIGO DIEZ PROUST Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE May 1988 Major Subject: Geophysics CHARACTERIZATION OF A SANDSTONE RESERVOIR USING SEISMIC METHODS: YOWLUMNE FIELD KERN COUNTY, CALIFORNIA A Thesis by RODRIGO DIEZ PROUST Approved as to style s. nd content by: Anth...

Proust, Rodrigo Diez

2012-06-07

98

Oak Management by County Jurisdictions in the Central Sierra Nevada, California1  

E-print Network

Oak Management by County Jurisdictions in the Central Sierra Nevada, California1 Richard R. Harris2 protection is provided to oak woodlands during the land development process. We selected three Sierra Nevada components: 1) analysis of county plans, policies, guidelines, and ordinances to determine if oak woodland

Standiford, Richard B.

99

Whose vision? Conspiracy theory and land-use planning in Nevada County, California  

Microsoft Academic Search

In this paper we examine the role of claims of global conspiracy in undermining a local environmental planning process known as Natural Heritage 2020 (NH 2020) in Nevada County, California. County officials intended NH 2020 to mitigate the environmental impacts of rapid growth in this gentrifying rural community. This program illustrates the increasing use by land-use planners of landscape-scale approaches

Patrick T Hurley; Peter A Walker

2004-01-01

100

NAME: West Goleta Slough Restoration Project LOCATION: Santa Barbara County, California  

E-print Network

NAME: West Goleta Slough Restoration Project LOCATION: Santa Barbara County, California ACRES: 20 of the 34.4-acre Goleta Slough Ecological Reserve, owned by the California Department of Fish and Game. The project is part of a much larger, Slough-wide restoration effort being spearheaded by the Goleta Slough

US Army Corps of Engineers

101

AVIFAUNA AND RIPARIAN VEGETATION IN CARMEL VALLEY, MONTEREY COUNTY, CALIFORNIA1  

E-print Network

AVIFAUNA AND RIPARIAN VEGETATION IN CARMEL VALLEY, MONTEREY COUNTY, CALIFORNIA1 Molly Williams and John G. Williams2 Presented at the California Riparian Systems Conference; September 22-24, 1988; Davis abundance and diversity were mea- sured at 5 sites in the riparian zone of the Carmel River, selected

Standiford, Richard B.

102

Evidence of shallow hydrocarbons offshore northern Santa Cruz county, California  

SciTech Connect

Analyses of high-resolution seismic reflection profiles and hydrocarbon samples indicate that natural hydrocarbon seepage is occurring along the San Gregorio and Monterey Bay fault zones offshore northern Santa Cruz County, California. A variety of anomalous seismic reflection features such as a water-column anomalies, subsurface amplitude anomalies (''bright spots''), and seismic ''smears/wipeouts'' has been observed and mapped. More than 100 water-column anomalies (probably gas seeps) occur in the study area of approximately 270 mi/sup 2/ (700 km/sup 2/). Many of these seismic anomalies are associated with subsurface geologic structures, which suggest hydrocarbon migration from depth. Samples of natural gas collected from a shallow coastal water well contain 74 to 91% methane, 7 to 23% nitrogen, approx.2% carbon dioxide, and < 1% ethane. The methane appears to be thermogenic in origin, having delta/sup 13/C values of -29.51 to -32.55% PDB. Rock dredges from 2,300 ft (700 m) of water in Ascension Submarine Canyon have also recovered oil-saturated sandstones, further suggesting the seepage of hydrocarbons. The shallow occurrence of most of these hydrocarbons are interpreted to be the result of migration from depth along active faults within the San Gregorio and Monterey Bay faults zones.

Mullins, H.T.; Nagel, D.K.

1982-08-01

103

Natural egg mass deposition by the Humboldt squid (Dosidicus gigas) in the Gulf of California and characteristics of hatchlings and paralarvae  

Microsoft Academic Search

The jumbo or Humboldt squid, Dosidicus gigas, is an important fisheries resource and a significant participant in regional ecologies as both predator and prey. It is the largest species in the oceanic squid family Ommastrephidae and has the largest known potential fecundity of any cephalopod, yet little is understood about its reproductive biology. We report the first dis- covery of

B. C. S. Mexico

2008-01-01

104

75 FR 69057 - Foreign-Trade Zone 226-Merced, Madera, Fresno, and Tulare Counties, California; Site Renumbering...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Foreign-Trade Zone 226--Merced, Madera, Fresno, and Tulare Counties, California...Site 6 (87 acres)--City of Madera Airport Industrial Park/State Center Commerce Park, Falcon Drive, Madera (Madera County); Site 7 (10...

2010-11-10

105

78 FR 24309 - California High-Speed Rail Authority-Construction Exemption-in Merced, Madera and Fresno Counties...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Transportation Board [Docket No. FD 35724] California High-Speed Rail Authority--Construction Exemption--in Merced, Madera and Fresno Counties, Cal On March 27, 2013, California High-Speed Rail Authority (Authority), a noncarrier state...

2013-04-24

106

A water-resources data network evaluation for Monterey County, California; Phase 1; South county  

USGS Publications Warehouse

An evaluation made of rainfall, surface water, groundwater, and water quality monitoring networks in Salinas River basin in southern Monterey County, California, proposed all long-term rain gages be continued for extending short-term records and suggested the installation of two additional recording gages. Eight new storage rain gages were suggested at midaltitudes of east and west sides of Salinas Valley where few data are available. The evaluation revealed some short-term gaging stations could be discontinued because of good regression relations between them and the long-term stations Arroyo Seco near Soledad. Of 16 stations selected for the proposed network, 4 are new recording stations, 6 are new nonrecording streamflow and water quality sampling sites, 5 are existing stations, and the last is a station operated from 1969 to 1976; also included are water quality sampling stations on Lakes Nacimiento and San Antonio. The proposed groundwater network was developed from information on geology, geohydrology, and groundwater quality, high priority objectives for groundwater network, and consideration for providing good areal coverage of levels and water quality. Of 145 sites selected, 86 are existing monitoring wells. (USGS)

Showalter, P.K.; Hord, S.H.

1986-01-01

107

Humboldt River main stem, Nevada  

USGS Publications Warehouse

This data set contains the main stem of the Humboldt River as defined by Humboldt Project personnel of the U.S. Geological Survey Nevada District, 2001. The data set was digitized on screen using digital orthophoto quadrangles from 1994.

Warmath, Eric; Medina, Rose L.

2001-01-01

108

Metasomatism, titanian acmite, and alkali amphiboles in lithic- wacke inclusions within the Coyote Peak diatreme, Humboldt County, California.  

USGS Publications Warehouse

Lithic-wacke inclusions within the alkali-ultramafic diatreme at Coyote Peak record a history of pronounced metasomatism and crystal growth. The dominant metasomatic changes were loss of Si from the inclusions and mass influx of K, due to an unusually high K activity in the ultramafic host. The reaction with K converted much of the clay, quartz and lithic fraction of the lithic wacke into microcline, and exchanged Na from abundant clastic albite. Probe analyses are tabulated for cores and rims of titanian acmites, augites and alkali amphiboles. -J.A.Z.

Czamanske, S.A.; Atkin, G.K.

1985-01-01

109

County-level analysis of the impact of temperature and population increases on California wildfire data  

USGS Publications Warehouse

The extent to which the apparent increase in wildfire incidence and burn area in California from 1990 to 2006 is affected by population and temperature increases is examined. Using generalized linear models with random effects, we focus on the estimated impacts of increases in mean daily temperatures and populations in different counties on wildfire in those counties, after essentially controlling for the overall differences between counties in their overall mean temperatures and populations. We find that temperature increase appears to have a significant positive impact on both total burn area and number of observed wildfires. Population growth appears to have a much less pronounced impact on total burn area than do annual temperature increases, and population growth appears to be negatively correlated with the total number of observed wildfires. These effects are especially pronounced in the winter season and in Southern California counties.

Baltar, M.; Keeley, Jon E.; Schoenberg, F.P.

2013-01-01

110

Heat flow in the Coso Geothermal Area, Inyo County, California  

NASA Astrophysics Data System (ADS)

Obvious surface manifestations of an anomalous concentration of geothermal resources at the Coso geothermal area, Inyo County, California, include fumarolic activity and associated hydrothermally altered rocks. Pleistocene volcanic rocks associated with the geothermal activity include 38 rhyolite domes occupying a north trending structural and topographic ridge and numerous basaltic cinder cones and lava flows partly surrounding its southern half. In an investigation of the thermal regime of this Basin and Range geothermal area, temperature measurements were made in 25 shallow and 1 intermediate depth borehole. Geothermal gradients ranged from 25.3°C/km to 906.°C/km. The high gradients arise from convecting hot water and former convective transport of heat by dikes that fed the domes and flows. Thermal conductivity measurements were made on 312 samples from cores and drill cuttings. The resultant terrain-corrected heat flow values range from 1.6 to 23. HFU. The actual process by which heat is transferred is rather complex; however, the heat flow determinations can be divided into two groups. The first group, less than 4.0 HFU, are indicative of regions with primarily conductive regimes, although deep-seated mass transfer is implied. The second group, greater than 4.0 HFU, are characteristic of regions with considerable convective heat transfer in the shallow subsurface. The general shapes of the 3-and 5-HFU contours in the upper 35 m of the subsurface are essentially aligned with the major regional fault zones, suggesting that the high heat flows are the result of convective heat transfer caused by circulation of hot groundwater in these vertically permeable subsurface channels. The high heat flow values (>10 HFU) are essentially restricted to the rhyolite dome field and the associated surface thermal manifestations. Heat transferred by convection of water would be rapidly exhausted if it were not intermittently supplied with heat energy from depth; therefore the heat flow data substantiate the concept that the surface hydrothermal activity and associated volcanic rocks are products of a long-lived magmatic system that has periodically erupted lava during the past 0.3-1.0 m.y. This magmatic system is the crustal heat source for the present-day Coso geothermal system (1 HFU = 41.87 mW/m2).

Combs, Jim

1980-05-01

111

THE CALIFORNIA STATE UNIVERSITY Bakersfield / Channel Islands / Chico / Dominguez Hills / East Bay / Fresno / Fullerton / Humboldt / Long Beach / Los Angeles / Maritime Academy  

E-print Network

THE CALIFORNIA STATE UNIVERSITY Bakersfield / Channel Islands / Chico / Dominguez Hills / East Bay at California State University Fullerton College: Natural Sciences and Mathematics Amount Requested: $592 supplemental instruction (SI) program at California State University, Fullerton (CSUF) is to improve retention

de Lijser, Peter

112

NAME: Kent Island Restoration at Bolinas Lagoon LOCATION: Bolinas/Stinson Beach/Marin County/California  

E-print Network

plants. This project will remove invasive species and restore native vegetation, and de- anchorNAME: Kent Island Restoration at Bolinas Lagoon LOCATION: Bolinas/Stinson Beach/Marin County/California ACRES: 23 acres NON-FEDERAL SPONSORS: Marin County Open Space District County of Marin PROJECT

US Army Corps of Engineers

113

Addressing the Social Determinants of Health through the Alameda County, California, Place Matters Policy Initiative  

PubMed Central

In Alameda County, California, significant health inequities by race/ethnicity, income, and place persist. Many of the county's low-income residents and residents of color live in communities that have faced historical and current disinvestment through public policies. This disinvestment affects community conditions such as access to economic opportunities, well-maintained and affordable housing, high-quality schools, healthy food, safe parks, and clean water and air. These community conditions greatly affect health. At the invitation of the Joint Center for Political and Economic Studies' national Place Matters initiative, Alameda County Supervisor Keith Carson's Office and the Alameda County Public Health Department launched Alameda County Place Matters, an initiative that addresses community conditions through local policy change. We describe the initiative's creation, activities, policy successes, and best practices. PMID:24179279

Schaff, Katherine; Flournoy, Rebecca; Carson, Keith; Drenick, Teresa; Fujii, Darlene; Lee, Anna; Luginbuhl, Jessica; Mena, Mona; Shrago, Amy; Siegel, Anita; Stahl, Robert; Watkins-Tartt, Kimi; Willow, Pam; Witt, Sandra; Woloshin, Diane; Yamashita, Brenda

2013-01-01

114

Geothermal direct-heat study: Imperial County, California  

SciTech Connect

Potential applications of geothermal energy which would be compatible with the agricultural activities in the county were identified and a plan to attract potential users to the area was developed. The intent of the first effort was to identify general classifications of industries which could utilize geothermal heat in production processes. Two levels of analyses were utilized for this effort. Initially, activities relying on previously developed engineering and industrial concepts were investigated to determine capital costs, employment, and potential energy savings. Second, innovative concepts not yet fully developed were investigated to determine their potential applicability to the agricultural base of the county. These investigations indicated that the major potential applications of geothermal heat would involve industries related to food processing or other direct agriculture-related uses of raw materials produced or imported to the county. An implementation plan which can be utilized by the county to market direct heat applications was developed. A socioeconomics analysis examined the potential effects on the county from development of direct heat projects. The county's planning and permitting requirements for dirct heat projects were also examined.

Not Available

1983-05-01

115

Evaluating Channel Head Conditions for Environmental Impact Assessment in Northwestern Sonoma County, California  

Microsoft Academic Search

Erosion and sedimentation have been identified as processes significantly affecting water quality in northern California Coast Range watersheds. These watersheds, including the Gualala River watershed in northwestern Sonoma County, have been designated as having water quality impaired by sediment under provisions of the Clean Water Act Section 303(d). A study was performed to estimate potential increases in erosion rates resulting

M. N. Sherwood; M. O'Connor; R. Pennington

2007-01-01

116

Reservoir characterization and diagenesis of the oligocene 64-zone sandstone, North Belridge Field, Kern County, California  

Microsoft Academic Search

The Oligocene (Zemorrian) 64-Zone sandstone is an important oil and gas reservoir in North Belridge field, Kern County, California. The 64-Zone is a submarine-fan deposit that ranges from 83 to 137 m in thickness. The overall variations in reservoir quality reflect an upward increase in grain size associated with depositional processes. Three diagenetic events have had a significant impact on

T. R. Taylor; C. H. Soule

1993-01-01

117

BOUNDS ON SUBSURFACE MERCURY FLUX FROM THE SULPHUR BANK MERCURY MINE, LAKE COUNTY, CALIFORNIA  

EPA Science Inventory

The Sulphur Bank Mercury Mine (SBMM) in Lake County, California has been identified as a significant source of mercury to Clear Lake. The mine was operated from the 1860s through the 1950's. Mining started with surface operations, progressed to shaft mining, and later to open p...

118

Micro-Scale Distribution of Trace Elements in a High Boron Soil from Kern County, California  

E-print Network

Micro-Scale Distribution of Trace Elements in a High Boron Soil from Kern County, California P. Fox and 500 mg kg -1 soil total). White deposits were noted throughout the soil profile. The soil peds were air dried at 35º C and impregnated with LR White high grade resin under a vacuum in order to retain

119

Habitat restoration plan for Naval Petroleum Reserve No. 1, Kern County, California  

Microsoft Academic Search

In 1976 Congress directed that production on the US Department of Energy's (DOE) Naval Petroleum Reserve No. 1 (NPR-1) in Kern County, California, be increased to the maximum efficient rate to fulfill some United States needs for domestic oil and gas. The US Fish and Wildlife Service (FWS) issued a Biological Opinion, required under the Endangered Species Act of 1973,

T. P. OFarrell; D. L. Mitchell

1985-01-01

120

JUNCUS DIGITATUS (JUNCACEAE), A NEW ANNUAL RUSH FROM SHASTA COUNTY, CALIFORNIA, U.S.A  

Microsoft Academic Search

Juncus digitatus is an annual described from two localities in the foothills of the Cascade Range in Shasta County, California. It is separable from Juncus triformis by its later flowering period, linear fruits with an acuminate apex, longer capsules 11-17 mm; and fruits that are 3-4 times as long as the tepals. A key to Juncus section Caespitosi is provided

Carol W. Witham; Peter F. Zika

121

Sources of emergency water supplies in Santa Clara County, California  

USGS Publications Warehouse

Water distribution systems in Santa Clara County, Calif., may be damaged and rendered inoperable by a large earthquake or other disaster. In such an event, individual agencies may have to implement emergency measures to supply water for drinking, firefighting, decontamination, or other purposes. In Santa Clara County, 128 wells have been identified as potential water-supply sources in emergencies. The criteria used to select the wells are: yield of at least 3 liters per second (50 gallons per minute), good water quality, ready accessibility, and available emergency power. Purification methods of small water supplies are described. (Woodard-USGS)

Akers, J.P.

1977-01-01

122

THE CALIFORNIA STATE UNIVERSITY Bakersfield / Channel Islands / Chico / Dominguez Hills / East Bay / Fresno / Fullerton / Humboldt / Long Beach / Los Angeles / Maritime Academy  

E-print Network

THE CALIFORNIA STATE UNIVERSITY Bakersfield / Channel Islands / Chico / Dominguez Hills / East Bay)-278-2300 / F (657)-278-7699 AB-540 Instructions for Applying for AB-540 California Nonresident Tuition-7699 Email to: residency@fullerton.edu Attn: Residency Specialist Subject: AB-540 Form Mail to: California

de Lijser, Peter

123

THE CALIFORNIA STATE UNIVERSITY Bakersfield / Channel Islands / Chico / Dominguez Hills / East Bay / Fresno / Fullerton / Humboldt / Long Beach / Los Angeles / Maritime Academy  

E-print Network

THE CALIFORNIA STATE UNIVERSITY Bakersfield / Channel Islands / Chico / Dominguez Hills / East Bay Attachment A NOTICE OF NON-DISCRIMINATION ON THE BASIS OF SEX The California State University does) as prohibited by Title IX; Title IV; VAWA/Campus SaVE Act; California Education Code § 66250 et seq.; and

de Lijser, Peter

124

California County Data Book, 2001: Factors for School Success.  

ERIC Educational Resources Information Center

This Kids Count data book examines trends in the well-being of California's children, focusing on factors for school success. The statistical portrait is based on trends in 32 indicators of well-being in 4 areas: (1) education, including reading and mathematics achievement, high school dropout rates, and student-teacher ratios; (2) family…

Children Now, Oakland, CA.

125

Mineral resources of the North Algodones Dunes Wilderness Study Area (CDCA-360), Imperial County, California  

SciTech Connect

This report presents the results of a mineral survey of the North Algodones Dunes Wilderness Study Area (CDCA-360), California Desert Conservation Area, Imperial County, California. The potential for undiscovered base and precious metals, and sand and gravel within the North Algodones Dunes Wilderness Study Area is low. The study area has a moderate potential for geothermal energy. One small sand-free area between the Coachella Canal and the west edge of the dune field would probably be the only feasible exploration site for geothermal energy. The study area has a moderate to high potential for the occurrence of undiscovered gas/condensate within the underlying rocks. 21 refs.

Smith, R.S.U.; Yeend, W.; Dohrenwend, J.C.; Gese, D.D.

1984-01-01

126

Indian Valley Colleges, Marin County Community College District, Marin County, California  

ERIC Educational Resources Information Center

Indian Valley Colleges, in Marin County Community College District, was given an award in the AS&U 1977 College & University Architectural Competition for the design of separate cluster colleges that blend with the site with little disturbance. (Author/MLF)

American School and University, 1977

1977-01-01

127

Environment of deposition of the Yowlumne sandstone: internal morphology and rock properties, Kern County, California  

E-print Network

ENVIRONMENT OF DEPOSITION OF THE YOWLUMNE SANDSTONE: INTERNAL MORPHOLOGY AND ROCK PROPERTIES, KERN COUNTY, CALIFORNIA A Thesis by GILBERTO RAFAEL ROYO Submitted to the Graduate College of Texas A8M University in partial fulfillment... deposited in a narrow, dip trending, low sinuosity channel. The internal morphology of the reservoir is that of a "lensing layered" reservoir composed of 6 sandstone units. These units range in thickness from 20 ft (6 m) to 200 ft (60 m...

Royo, Gilberto Rafael

1986-01-01

128

A vapor-dominated reservoir exceeding 600°F at the Geysers, Sonoma County, California  

Microsoft Academic Search

A high-temperature vapor-dominated reservoir underlies a portion of the Northwest Geysers area, Sonoma County, California. The high-temperature reservoir (HTR) is defined by flowing fluid temperatures exceeding 500º F, rock temperatures apparently exceeding 600º F and steam enthalpies of about 1320 BTU\\/lb. Steam from existing wells drilled in the Northwest Geysers is produced from both a âtypical❠Geysers reservoir and the

M. A. Walters; J. N. Sternfeld; J. R. Haizlip; A. F. Drenick; Jim Combs

1988-01-01

129

Vapor-dominated reservoir exceeding 600 degrees F at The Geysers, Sonoma County, California  

Microsoft Academic Search

A high-temperature, vapor-dominated reservoir underlies a portion of the northwest Geysers area, Sonoma County, California. The high-temperature reservoir (HTR) is defined by flowing fluid temperatures exceeding 500°F, rock temperatures apparently exceeding 600°F, and steam enthalpies of about 1320 Btu\\/lb. The HTR in the northwest Geysers is probably a deep, evolving system in contrast to the shallower, leaky, and mature steam

M. A. Walters; J. N. Sternfeld; J. R. Haizlip; A. F. Drenick; J. Combs

1987-01-01

130

Environmental assessmental, geothermal energy, Heber geothermal binary-cycle demonstration project: Imperial County, California  

SciTech Connect

The proposed design, construction, and operation of a commercial-scale (45 MWe net) binary-cycle geothermal demonstration power plant are described using the liquid-dominated geothermal resource at Heber, Imperial County, California. The following are included in the environmental assessment: a description of the affected environment, potential environmental consequences of the proposed action, mitigation measures and monitoring plans, possible future developmental activities at the Heber anomaly, and regulations and permit requirements. (MHR)

Not Available

1980-10-01

131

Geology and quicksilver deposits of the New Almaden district, Santa Clara County, California  

USGS Publications Warehouse

The New Almaden district, situated a few miles south of San Jose in Santa Clara County, Calif., has yielded nearly 40 percent of the quicksilver produced in the United States. The area mapped as the district for this report includes about 80 square miles, extending south from the flat Santa Clara Valley across the moderately low foothills containing the mines to the more rugged crest of the California Coast Ranges.

Bailey, Edgar Herbert; Everhart, Donald Lough

1964-01-01

132

Ambient Air Pollution and Autism in Los Angeles County, California  

PubMed Central

Background: The prevalence of autistic disorder (AD), a serious developmental condition, has risen dramatically over the past two decades, but high-quality population-based research addressing etiology is limited. Objectives: We studied the influence of exposures to traffic-related air pollution during pregnancy on the development of autism using data from air monitoring stations and a land use regression (LUR) model to estimate exposures. Methods: Children of mothers who gave birth in Los Angeles, California, who were diagnosed with a primary AD diagnosis at 3–5 years of age during 1998–2009 were identified through the California Department of Developmental Services and linked to 1995–2006 California birth certificates. For 7,603 children with autism and 10 controls per case matched by sex, birth year, and minimum gestational age, birth addresses were mapped and linked to the nearest air monitoring station and a LUR model. We used conditional logistic regression, adjusting for maternal and perinatal characteristics including indicators of SES. Results: Per interquartile range (IQR) increase, we estimated a 12–15% relative increase in odds of autism for ozone [odds ratio (OR) = 1.12, 95% CI: 1.06, 1.19; per 11.54-ppb increase] and particulate matter ? 2.5 µm (OR = 1.15; 95% CI: 1.06, 1.24; per 4.68-?g/m3 increase) when mutually adjusting for both pollutants. Furthermore, we estimated 3–9% relative increases in odds per IQR increase for LUR-based nitric oxide and nitrogen dioxide exposure estimates. LUR-based associations were strongest for children of mothers with less than a high school education. Conclusion: Measured and estimated exposures from ambient pollutant monitors and LUR model suggest associations between autism and prenatal air pollution exposure, mostly related to traffic sources. PMID:23249813

Becerra, Tracy Ann; Wilhelm, Michelle; Olsen, Jørn; Cockburn, Myles

2012-01-01

133

Poverty, Sprawl, and Restaurant Types Influence Body Mass Index of Residents in California Counties  

PubMed Central

Objectives. This article examines the relationships between structural poverty (the proportion of people in a county living at ?130% of the federal poverty level [FPL]), urban sprawl, and three types of restaurants (grouped as fast food, chain full service, and independent full service) in explaining body mass index (BMI) of individuals. Methods. Relationships were tested with two-tiered hierarchical models. Individual-level data, including the outcome variable of calculated BMI, were from the 2005, 2006, and 2007 California Behavioral Risk Factor Surveillance Survey (n=14,205). County-level data (n=33) were compiled from three sources. The 2000 U.S. Census provided the proportion of county residents living at ?130% of FPL and county demographic descriptors. The sprawl index used came from the Smart Growth America Project. Fast-food, full-service chain, and full-service independently owned restaurants as proportions of the total retail food environment were constructed from a commercially available market research database from 2004. Results. In the analysis, county-level demographic characteristics lost significance and poverty had a consistent, robust association on BMI (p<0.001). Sprawl demonstrated an additional, complementary association to county poverty (p<0.001). Independent restaurants had a large, negative association to BMI (p<0.001). The coefficients for chain and fast-food restaurants were large and positive (p?0.001), indicating that as the proportion of these restaurants in a county increases, so does BMI. Conclusions. This study demonstrates the important role of county poverty and urban sprawl toward understanding environmental influences on BMI. Using three categories of restaurants demonstrates different associations of full-service chain and independent restaurants, which are often combined in other research. PMID:21563722

Gregson, Jennifer

2011-01-01

134

Sources of emergency water supplies in San Mateo County, California  

USGS Publications Warehouse

San Mateo County has several densely populated urban areas that get most of their water supplies from surface-water sources that could by damaged by a major earthquake or other general disaster. In the event of such a disaster, limited supplies of potable water may be obtained from selected wells, springs, and perennial streams. This report outlines the principal sources of existing water supplies, gives information on the need for emergency water-supply procedures, presents general criteria needed for selecting emergency water-supply wells, summarizes information for 60 selected water wells, numerous springs, and perennial streams that can be used as sources of water, and describes emergency water-purification procedures that can be used by individuals or small groups of people.

Wood, P.R.

1975-01-01

135

California State Library Statistics, 2004: Fiscal Year 2002-2003. From Public, Academic, Special and County Law Libraries  

ERIC Educational Resources Information Center

Each year the State Library sends annual report forms to California's academic, public, special, state agency, and county law libraries. Statistical data from those reports are tabulated in this publication, with directory listings published in the companion volume, California Library Directory. For this fiscal year four hundred and thirty seven…

Bray, Ira, Ed.

2004-01-01

136

California Library Statistics, 2009: Fiscal Year 2007-2008 from Public, Academic, Special and County Law Libraries  

ERIC Educational Resources Information Center

Each year the State Library sends annual report forms to California's public, academic, special, state agency, and county law libraries. Statistical data from those reports are tabulated in this publication, with directory listings published in the companion volume, "California Library Directory." For this fiscal year, 389 libraries of all types…

Bray, Ira, Ed.

2009-01-01

137

California Library Statistics, 2005: Fiscal Year 2003-2004 from Public, Academic, Special and County Law Libraries  

ERIC Educational Resources Information Center

Each year the State Library sends annual report forms to California's academic, public, special, state agency, and county law libraries. Statistical data from those reports are tabulated in this publication, with directory listings published in the companion volume, California Library Directory. For this fiscal year four hundred and eight…

Bray, Ira, Ed.

2005-01-01

138

Geohydrology and evapotranspiration at Franklin Lake playa, Inyo County, California  

SciTech Connect

Franklin Lake playa is one of the principal discharge areas of the Furnace Creek Ranch-Alkali Flat ground-water-flow system in southern Nevada and adjacent California. Yucca Mountain, Nevada, located within this flow system, is being evaluated by the US Department of Energy to determine its suitability as a potential site for a high-level nuclear-waste repository. To assist the U.S. Department of Energy with its evaluation of the Yucca Mountain site, the US Geological Survey developed a parameter-estimation model of the Furnace Creek Ranch-Alkali Flat ground-water-flow system. Results from sensitivity analyses made using the parameter-estimation model indicated that simulated rates of evapotranspiration at Franklin Lake playa had the largest effect on the calculation of transmissivity values at Yucca Mountain of all the model-boundary conditions and, therefore, that evapotranspiration required careful definition.

Czarnecki, J.B.

1997-12-31

139

Geohydrology and evapotranspiration at Franklin Lake Playa, Inyo County, California  

SciTech Connect

Franklin Lake playa is one of the principal discharge areas of the Furnace Creek Ranch-Alkali Flat ground-water-flow system in southern Nevada and adjacent California. Yucca Mountain, Nevada, located within this flow system, is being evaluated by the US Department of Energy to determine its suitability as a potential site for a high-level nuclear-waste repository. To assist the US Department of Energy with its evaluation of the Yucca Mountain site, the US Geological Survey developed a parameter-estimation model of the Furnace Creek Ranch-Alkali Flat ground-water-flow system. Results from sensitivity analyses made using the parameter-estimation model indicated that simulated rates of evapotranspiration at Franklin Lake playa had the largest effect on the calculation of transmissivity values at Yucca Mountain of all the model-boundary conditions and, therefore, that evapotranspiration required careful definition. 72 refs., 59 figs., 26 tab.

NONE

1990-12-01

140

The January 1977 avian cholera epornitic in northwest California.  

PubMed

A total of 844 birds were observed dead at three sites in Humboldt County and an estimated 6750 birds died at three sites in Del Norte County, California. Coots were the primary species affected. The isolation of Pasteurella multocida from a snowy egret (Egretta thula) is the first reported case of avian cholera in this bird. There was evidence for a distinct sequence in the bird species dying at one site; American coots (Fulica americana) appeared to be the first species to die. PMID:691123

Oddo, A F; Pagan, R D; Worden, L; Botzler, R G

1978-07-01

141

Rickettsia felis in cat fleas, Ctenocephalides felis parasitizing opossums, San Bernardino County, California.  

PubMed

Los Angeles and Orange Counties are known endemic areas for murine typhus in California; however, no recent reports of flea-borne rickettsioses are known from adjacent San Bernardino County. Sixty-five opossums (Didelphis virginiana) were trapped in the suburban residential and industrial zones of the southwestern part of San Bernardino County in 2007. Sixty out of 65 opossums were infested with fleas, primarily cat fleas, Ctenocephalides felis (Bouché, 1835). The flea minimum infection rate with Rickettsia felis was 13.3% in pooled samples and the prevalence was 23.7% in single fleas, with two gltA genotypes detected. In spite of historic records of murine typhus in this area, no evidence for circulation of R. typhi in fleas was found during the present study. Factors contributing to the absence of R. typhi in these cat fleas in contrast to its presence in cat fleas from Orange and Los Angeles Counties are unknown and need to be investigated further in San Bernardino County. PMID:22712460

Abramowicz, K F; Wekesa, J W; Nwadike, C N; Zambrano, M L; Karpathy, S E; Cecil, D; Burns, J; Hu, R; Eremeeva, M E

2012-12-01

142

Digital Geologic Map of the Nevada Test Site and Vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California  

USGS Publications Warehouse

This digital geologic map of the Nevada Test Site (NTS) and vicinity, as well as its accompanying digital geophysical maps, are compiled at 1:100,000 scale. The map compilation presents new polygon (geologic map unit contacts), line (fault, fold axis, metamorphic isograd, dike, and caldera wall) and point (structural attitude) vector data for the NTS and vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California. The map area covers two 30 x 60-minute quadrangles-the Pahute Mesa quadrangle to the north and the Beatty quadrangle to the south-plus a strip of 7.5-minute quadrangles on the east side-72 quadrangles in all. In addition to the NTS, the map area includes the rest of the southwest Nevada volcanic field, part of the Walker Lane, most of the Amargosa Desert, part of the Funeral and Grapevine Mountains, some of Death Valley, and the northern Spring Mountains. This geologic map improves on previous geologic mapping of the same area (Wahl and others, 1997) by providing new and updated Quaternary and bedrock geology, new geophysical interpretations of faults beneath the basins, and improved GIS coverages. Concurrent publications to this one include a new isostatic gravity map (Ponce and others, 1999) and a new aeromagnetic map (Ponce, 1999).

Slate, Janet L.; Berry, Margaret E.; Rowley, Peter D.; Fridrich, Christopher J.; Morgan, Karen S.; Workman, Jeremiah B.; Young, Owen D.; Dixon, Gary L.; Williams, Van S.; McKee, Edwin H.; Ponce, David A.; Hildenbrand, Thomas G.; Swadley, W.C.; Lundstrom, Scott C.; Ekren, E. Bartlett; Warren, Richard G.; Cole, James C.; Fleck, Robert J.; Lanphere, Marvin A.; Sawyer, David A.; Minor, Scott A.; Grunwald, Daniel J.; Laczniak, Randell J.; Menges, Christopher M.; Yount, James C.; Jayko, Angela S.

1999-01-01

143

Yuma District Resource Management Plan, Yuma, La Paz, and Mohave Counties, Arizona and San Bernardino, Riverside and Imperial Counties, California  

SciTech Connect

Implementation of a resource management plan is proposed for 1.2 million acres within the 2.7-million-acre Yuma District, located in Yuma, La Paz, and Mohave counties, Arizona and San Bernardino, Riverside, and Imperial counties, California. Under the preferred alternative, wildlife habitat would be a priority consideration on approximately 247,740 acre, and nine special management areas would be designated. A portion of the Cactus Plain and the Chemehuevi/Needles wilderness study areas would be recommended for wilderness designation. Two areas totaling 31,360 acres would be designated as special management areas, and another six areas totaling 155,705 acres would be managed to protect their natural values. Livestock grazing would be authorized at 3998 animal unit months on four allotments. Approximately 55,490 acres of federal lands would be available for disposal and 31,220 acres would be acquired. Nine utility corridors and nine communication sites would be designated. Existing recreational facilities would be maintained, with additional facilities provided when warranted. Along Parker Strip, only floodproofed day-use facilities would be allowed within the 100-year flood plain. Off-road vehicle (ORV) use designations would be made on 640 acres and ORV use in the remainder of the district would be limited to existing roads and trails. Continuous occupancy of mobile home sites would be restricted to one five-month period in a single year. Permanent residential use would be phased out.

Not Available

1985-08-01

144

Clay mineralogy of Pleistocene Lake Tecopa, Inyo County, California  

USGS Publications Warehouse

Pleistocene Lake Tecopa in southeastern Inyo County, Calif., was formed when the Amargosa River was blocked at the southern end of its valley. The lake acted as a settling basin for detrital material being transported by the river. This detritus consisted of clays, quartz, feldspars, and micas which became mudstones and siltstones. These mudstones and siltstones, much eroded and dissected after the draining of the lake, extend over the entire basin and are interbedded with tuffs formed by the intermittent deposition of volcanic ashfalls in the former lake waters. These lightcolored mudstones and siltstones are tough and well indurated and break with a conchoidal fracture. The predominant clay mineral in these detrital beds is a lithiumbearing saponite, which is found not only in the lake beds but also in the area beyond the boundaries of the lake, especially in fluvial deposits in the drainage basin of the Amargosa River to the north. This saponite does not contain enough lithium to be classified as a hectorite, and we have observed no indications that this clay consists of a mixture of two phases, such as hectorite and a diluent. Some authigenic dioctahedral montmorillonite, found only in small quantities close to the tuffs, was formed by alteration of the volcanic glass of the tuffs and was then admixed with the overlying or underlying detrital clays. The only authigenic clay-type mineral found in any significant quantity is sepiolite, found near the edges of the lake basin and stratigraphically located mainly within a meter of the two uppermost tuffs. This sepiolite probably was precipitated when silica became available to the magnesium-bearing lake water through dissolution of the volcanic ash. Precipitation of sepiolite probably did not occur within the tuffs owing to the presence of alumina in solution. Zeolites were produced there and sepiolite formed outside the margins of the tuffs. Also formed by the high-pH lake waters were water-soluble minerals, which were found widely dispersed in crusts or streaks on the clays. Much of the calcite was likely precipitated from the lake waters, especially near the north end of the lake where calciumbearing fresh water came into contact with the C02-rich lake waters. Magadiite, a sodium silicate mineral reported only twice previously in the United States, was found in small quantities in the southern end of the basin. This mineral is indicative of a minimum pH of 8.5. The authigenic minerals formed in the lake reflect the presence of silica-rich tuffs and the high-pH, alkaline character of the lake waters.

Starkey, Harry C.; Blackmon, Paul D.

1979-01-01

145

Recently Exposed Fumarole Fields Near Mullet Island, Imperial County, California  

NASA Astrophysics Data System (ADS)

New field observations, lidar measurements, aerial imaging and preliminary laboratory measurements of mud samples are reported of three formerly submerged fumarole fields in the Salton Trough near Mullet Island in southeastern California, USA. The fumarole fields have recently been exposed as the Salton Sea level has dropped. The largest of the three fields visited in January 2011 is irregular in outline with a marked northeast elongation. It is roughly 400 meters long and 120 meters wide. The field consists of approximately one hundred warm to boiling hot (100° C) mud volcanoes (0.1 - 2 m in height), several hundred mud pots, and countless CO2 gas vents. Unusual shaped mud volcanoes in the form of vertical tubes with central vents were observed in many places. Lidar measurements were obtained in the time period Nov 9-13, 2010 using an Optech Orion 200M lidar from an elevation 800 m AGL. They reveal that the terrain immediately surrounding the two fields that are above water level reside on a low (~0.5 m high) gently sloping mound about 500 m across that shows no evidence of lineaments indicative of surface faulting. With other geothermal features, the fumaroles define a well-defined line marking the probable trace of the Calipatria fault. Although the precise locations is uncertain, it appears to define a straight line 4 km long between the Davis-Schrimpf mud volcanoes and Mullet Island. Mullet Island is one of five late Quaternary rhyolitic volcanic necks in the immediate area of the fumaroles. The Calipatria fault is subparallel to the San Andreas and Imperial faults and only one of many verified or suspected faults (including cross faults) in the complex tectonic setting of the Salton Trough. Mud from several volcanoes was analyzed using scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). One sample contained boussingaultite, (NH4)2Mg(SO4)2.6(H2O), a rare mineral that is known to sublime under fumarolic conditions, possibly by ammoniation of hydrated MgSO4. As the Salton Sea level continues to drop, the third fumarole field is expected to surface in the next couple of years. It is also likely that as more land emerges, many of the CO2 gas seeps currently under water will begin to for mud volcanoes and mud pots, most of them along the same NW trending axis as the others. At about the same time a land bridge will form to Mullet Island, the first in about 60 years.

Lynch, D. K.; Hudnut, K.; Adams, P.; Bernstein, L.

2011-12-01

146

Digital database of microfossil localities in Alameda and Contra Costa Counties, California  

USGS Publications Warehouse

The eastern San Francisco Bay region (Contra Costa and Alameda Counties, California) is a geologically complex area divided by faults into a suite of tectonic blocks. Each block contains a unique stratigraphic sequence of Tertiary sediments that in most blocks unconformably overlie Mesozoic sediments. Age and environmental interpretations based on analysis of microfossil assemblages are key factors in interpreting geologic history, structure, and correlation of each block. Much of this data, however, is distributed in unpublished internal reports and memos, and is generally unavailable to the geologic community. In this report the U.S. Geological Survey microfossil data from the Tertiary sediments of Alameda and Contra Costa counties are analyzed and presented in a digital database, which provides a user-friendly summary of the micropaleontologic data, locality information, and biostratigraphic and ecologic interpretations.

McDougall, Kristin; Block, Debra

2014-01-01

147

Neotectonics of the southern Amargosa Desert, Nye County, Nevada and Inyo County, California  

SciTech Connect

A complex pattern of active faults occurs in the southern Amargosa Desert, southern Nye, County, Nevada. These faults can be grouped into three main fault systems: (1) a NE-striking zone of faults that forms the southwest extension of the left-lateral Rock Valley fault zone, in the much larger Spotted Range-Mine Mountain structural zone, (2) a N-striking fault zone coinciding with a NNW-trending alignment of springs that is either a northward continuation of a fault along the west side of the Resting Spring Range or a N-striking branch fault of the Pahrump fault system, and (3) a NW-striking fault zone which is parallel to the Pahrump fault system, but is offset approximately 5 km with a left step in southern Ash Meadows. These three fault zones suggest extension is occurring in an E-W direction, which is compatible with the {approximately}N10W structural grain prevalent in the Death Valley extensional region to the west.

Donovan, D.E. [Nevada Univ., Reno, NV (United States)

1991-05-01

148

Capacity and sedimentation of Loch Lomond Reservoir Santa Cruz County, California  

USGS Publications Warehouse

A sedimentation study of Loch Lomond Reservoir in Santa Cruz County, California, was begun in 1982 to determine reservoir storage capacity and to establish permanent ranges for future studies. Results of a reservoir survey indicated a total storage capacity of 8,824 acre-ft in 1982. Comparison of thalweg profiles from this survey and a survey done prior to dam construction in 1960 shows that deposition has occurred in the lower reach of the reservoir due to landsliding and in the upper reach due to sediment inflow from Newell Creek. (Author 's abstract)

Fogelman, R.P.; Johnson, K.L.

1985-01-01

149

Data from a solute transport experiment in the Leviathan Mine drainage, Alpine County, California, October 1982  

USGS Publications Warehouse

A twenty-four hour injection of chloride and sodium was made into Leviathan Creek, Alpine County, California to aid interpretation of the coupled interactions between physical transport processes and geochemical reactions. Leviathan Creek was chosen because it receives acid mine drainage from Leviathan Mine, an abandoned open-pit sulfur mine. Water samples were collected at 15 sites along a 4.39 kilometer reach and analyzed for chloride, sodium, sulfate and fluoride. Dissolved concentrations are presented in tabular format and time-series plots. Duplicate samples were analyzed by two laboratories: the Central Laboratory, Denver, Colorado and a research laboratory in Menlo Park, California. A tabular comparison of the analyses and plots of the differences between the two laboratories is presented. Hydrographs and instantaneous discharge measurements are included. (USGS)

Flint, M.R.; Bencala, K.E.; Zellweger, G.W.; Hammermeister, D.P.

1985-01-01

150

Geologic map of the Mound Spring quadrangle, Nye and Clark Counties, Nevada, and Inyo County, California  

USGS Publications Warehouse

The Mound Spring quadrangle, the southwestern-most 7.5' quadrangle of the area of the Las Vegas 1:100,000-scale quadrangle, is entirely within the Pahrump Valley, spanning the Nevada/California State line. New geologic mapping of the predominantly Quaternary materials is combined with new studies of gravity and geochronology in this quadrangle. Eleven predominantly fine-grained units are delineated, including playa sediment, dune sand, and deposits associated with several cycles of past groundwater discharge and distal fan sedimentation. These units are intercalated with 5 predominantly coarse-grained alluvial-fan and wash gravel units mainly derived from the Spring Mountains. The gravel units are distinguished on the basis of soil development and associated surficial characteristics. Thermoluminescence and U-series geochronology constrain most of the units to the Holocene and late and middle Pleistocene. Deposits of late Pleistocene groundwater discharge in the northeast part of the quadrangle are associated with a down-to-the-southwest fault zone that is expressed by surface fault scarps and a steep gravity gradient. The gravity field also defines a northwest-trending uplift along the State line, in which the oldest sediments are poorly exposed. About 2 km to the northeast a prominent southwest-facing erosional escarpment is formed by resistant beds in middle Pleistocene fine-grained sediments that dip northeast away from the uplift. These sediments include cycles of groundwater discharge that were probably caused by upwelling of southwesterly groundwater flow that encountered the horst.

Lundstrom, Scott C.; Mahan, Shannon A.; Blakely, Richard J.; Paces, James B.; Young, Owen D.; Workman, Jeremiah B.; Dixon, Gary L.

2003-01-01

151

Ground-water resources of Honey Lake valley, Lassen County, California, and Washoe County, Nevada  

USGS Publications Warehouse

Honey Lake Valley is a 2,200 sq-mi, topographically closed basin about 35 miles northwest of Reno, Nevada. Unconsolidated basin-fill deposits on the valley floor and fractured volcanic rocks in northern and eastern uplands are the principal aquifers. In the study area, about 130,000 acre- ft of water recharges the aquifer system annually, about 40% by direct infiltration of precipitation and about 60% by infiltration of streamflow and irrigation water. Balancing this is an equal amount of groundwater discharge, of which about 65% evaporates from the water table or is transpired by phreatophytes, about 30 % is withdrawn from wells, and about 5% leaves the basin as subsurface outflow to the east. Results of a groundwater flow model of the eastern part of the basin, where withdrawals for public supply have been proposed, indicate that if 15,000 acre-ft of water were withdrawn annually, a new equilibrium would eventually be established by a reduction of about 60% in both evapotranspiration and subsurface outflow to the east. Hydrologic effects would be minimal at the western boundary of the flow-model area. Within the modeled area, the increased withdrawals cause an increase in the simulated net flow of groundwater eastward across the California-Nevada State line from about 670 acre-ft/yr to about 2,300 acre-ft/yr. (USGS)

Handman, E.H.; Londquist, C.J.; Maurer, D.K.

1990-01-01

152

ISOLATION OF Leptospira pomona FROM A NATURALLY INFECTED CALIFORNIA SEA LION, SONOMA COUNTY, CALIFORNIA  

Microsoft Academic Search

Leplospira pomnomia was isolated from the urine and renal tissue of a sub- adult male California sea lion (Za\\/oph its caliform,ianus ca\\/iforniamius). Serum from the sea lion agglutinated L. pomona to a titer of 1:10,000. There was marked inter- stitial nephnitis with lymphocytic and plasmacytic infiltration. Widespread degenerative changes occurred in the tubular epithelium of the kidney, but the glomeruli

T. J. McILHATTAN; J. W. MARTIN; R. J. WAGNER

153

Occurrence of Pacific Fisher (Martes pennanti pacifica) in the Redwood Zone of Northern California and the Habitat Attributes Associated with their Detections  

Microsoft Academic Search

ABSTRACT I conducted sooted track plate surveys in Humboldt and Del Node Counties, California , not detect fishers. Detection ratios were compared between the 3 vegetation types that occur on the study area., Predominantly Douglas-fir (Pseudotsuga menziesii) stands had detection ratios of 0.24. 0.38, and 0.46 in 1994, 1995, and for both years combined, respe&vely. Douglas-fir and redwood (Sequoia

Richard R. Klug

1997-01-01

154

Mitigation action plan sale of Naval Petroleum Reserve No. 1 (Elk Hills) Kern County, California  

SciTech Connect

Naval Petroleum Reserve No. 1 (NPR-1, also called {open_quotes}Elk Hills{close_quotes}), a Federally-owned oil and gas production field in Kern County, California, was created by an Executive Order issued by President Taft on September 2, 1912. He signed another Executive Order on December 13, 1912, to establish Naval Petroleum Reserve No. 2 (NPR-2), located immediately south of NPR-1 and containing portions of the town of Taft, California. NPR-1 was not developed until the 1973-74 oil embargo demonstrated the nation`s vulnerability to oil supply interruptions. Following the embargo, Congress passed the Naval Petroleum Reserves Production Act of 1976 which directed that the reserve be explored and developed to its fall economic potential at the {open_quotes}maximum efficient rate{close_quotes} (MER) of production. Since Elk Hills began full production in 1976, it has functioned as a commercial operation, with total revenues to the Federal government through FY 1996 of $16.4 billion, compared to total exploration, development and production costs of $3.1 billion. In February 1996, Title 34 of the National Defense Authorization Act for Fiscal Year 1996 (P.L. 104-106), referred to as the Elk Hills Sales Statute, directed the Secretary of Energy to sell NPR-1 by February 10, 1998.The Secretary was also directed to study options for enhancing the value of the other Naval Petroleum and Oil Shale Reserve properties such as NPR-2, located adjacent to NPR-1 in Kern County- Naval Petroleum Reserve No. 3 (NPR-3) located in Natrona County, Wyoming; Naval Oil Shale Reserves No. 1 and No. 3 (NOSR-1 and NOSR-3) located in Garfield County, Colorado; and Naval Oil Shale Reserve No. 2 (NOSR-2) located in Uintah and Carbon Counties, Utah. The purpose of these actions was to remove the Federal government from the inherently non-Federal function of operating commercial oil fields while making sure that the public would obtain the maximum value from the reserves.

NONE

1998-01-01

155

76 FR 30025 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Placer County Air Pollution Control District and Ventura County Air Pollution Control District AGENCY: Environmental...revisions to the Placer County Air Pollution Control District (PCAPCD)...

2011-05-24

156

76 FR 30080 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Placer County Air Pollution Control District and Ventura County Air Pollution Control District AGENCY: Environmental...revisions to the Placer County Air Pollution Control District (PCAPCD)...

2011-05-24

157

Mapping Episodic Stream Activity for the Ridgecrest Solar Power Project, Kern County, California  

NASA Astrophysics Data System (ADS)

Large-scale renewable energy projects are being developed in the California desert region on large tracts of predominantly undeveloped land (total area of developed land for individual project sites vary from 327 acres to 8,230 acres). The absence of a standard method of identifying and accounting for episodic streams in arid and semi-arid (dryland) regions is an area of conflict between project developers and the government agencies responsible for protecting natural resources and permitting renewable energy projects. There is a need for an accurate dryland stream delineation protocol that is consistent, efficient, accessible, and accurately reflects the extent and distribution of streams on a site. Dryland stream delineation protocol based on a scientific, geomorphic and ecological understanding of dryland stream processes will help ensure dryland streams are accurately identified for the purposes of environmental impact assessments and project permitting. Such a method is currently being developed by the California Energy Commission (CEC) and the Department of Fish and Wildlife (CDFW). This thesis work critically evaluates the stream delineation and stream impact assessment previously completed by the developer for the proposed renewable energy project in El Paso Fan, El Paso Mountains, Ridgecrest, Kern County, California. This evaluation is then compared and contrasted with the results achieved in the field using the MESA (Mapping Episodic Stream Activity) stream delineation methods and protocols and mobile GIS mapping technology.

Thibodeaux-Yost, S. N.; Brady, R. H., III; Vyverberg, K.; Weinman, B.

2013-12-01

158

Detection of Coccidioides immitis in Kern County, California, by multiplex PCR.  

PubMed

Coccidioides immitis is a fungal human pathogen endemic to semiarid soils in southern California and Baja California (Mexico). Results of culture-dependent detection of C. immitis in the past indicated a spotty distribution and unreliable prediction of C. immitis growth sites and accumulation sites. In this project we investigated bulk soil samples for the presence of the pathogen in nonagricultural loamy soils at nine different locations around Bakersfield, Kern County, California, for almost 2 y (2008-2009). To detect the pathogen we used a multiplex PCR method with optimized soil handling and storage, DNA extraction procedure and PCR protocol. With this method we were able to detect C. immitis in 8.42% of our samples in 2008 (n = 285), mostly from early spring to early summer. In 2009 however the percentage of samples positive for C. immitis from the same sites declined to 2.68% (n = 261). We also were able to distinguish C. immitis growth sites from accumulation sites. One site close to a recreation area (Lake Webb, Buena Vista Lake Basin), not previously known to support the growth of C. immitis, was identified as a strong growth site of the fungus. The cultivation-independent method in this study together with soil parameters can be used to predict and confirm C. immitis growth sites and might be a valuable tool for public health institutions. PMID:21933931

Lauer, Antje; Baal, Joe Darryl Hugo; Baal, Jed Cyril Hugo; Verma, Mona; Chen, Jeffrey M

2012-01-01

159

ANAEROBIC DEGRADATION OF MTBE TO TBA IN GROUND WATER AT GASOLINE SPILL SITES IN ORANGE COUNTY, CALIFORNIA  

EPA Science Inventory

Although tert-Butyl Alcohol (TBA) has not been used as a fuel oxygenate in Orange County, California, the concentrations of TBA in ground water at gasoline spill sites are high compared to the concentrations of the conventional fuel oxygenate Methyl tert-Butyl Ether (MTBE). In t...

160

Reservoir description is key to steamflood planning and implementation, Webster Reservoir, Midway-Sunset Field, Kern County, California  

Microsoft Academic Search

The Webster reservoir at Midway-Sunset field, Kern County, California, is an unconsolidated sand reservoir of Miocene age (''Stevens equivalent,'' Monterey Formation). The Webster was discovered in 1910 but, due to poor heavy oil (14° API) economics, development for primary production and subsequent enhanced recovery were sporadic. Currently, the reservoir produces by cyclic steam stimulation in approximately 35 wells. Cumulative oil

B. R. Hall; M. H. Link

1988-01-01

161

HYDROGEOLOGICAL AND GEOCHEMICAL FACTORS INFLUENCING MERCURY FATE AND TRANSPORT AT THE SULPHUR BANK MERCURY MINE, LAKE COUNTY, CALIFORNIA  

EPA Science Inventory

Clear Lake, located approximately 150 km north of San Francisco in Lake County, is one of the largest fresh water lakes in the California. Elevated mercury levels were first identified in fish from Clear Lake in the late 1970s and early 1980s. Although naturally occurring mercury...

162

The effect of selenium on reproduction of black-tailed deer (Odocoileus hemionus columbianus) in Shasta County California  

Microsoft Academic Search

This study was to determine if nutritional inadequacy of selenium may be responsible for a declining reproductive rate of a migratory herd of black-tailed deer. Selenium is an essential trace mineral for mammalian herbivores. Deficiency affects primarily neonates resulting in increased mortality rates. Shasta County, California is indigenously low in selenium due to soil characteristics. Local livestock enterprises have experienced

Flueck

1989-01-01

163

Identification of environmental issues: Hybrid wood-geothermal power plant, Wendel-Amedee KGRA, Lassen County, California: First phase report  

SciTech Connect

The development of a 55 MWe power plant in Lassen County, California, has been proposed. The proposed power plant is unique in that it will utilize goethermal heat and wood fuel to generate electrical power. This report identifies environmental issues and constraints which may impact the proposed hybrid wood-geothermal power plant. (ACR)

Not Available

1981-08-14

164

NAVEL BASE VENTURA COUNTY, PORT HUENEME, CALIFORNIA EPA CHARACTERIZATION TEST CELL REPORT ON ELECTROMAGNETIC SURVEYS IN THE TEST CELL AREA  

EPA Science Inventory

The objective of the geophysical surveys at the EPA Characterization Test Cell (CTC) area (Site) at Naval Base Ventura County, Port Hueneme, California is to locate geophysical anomalies indicative of metallic objects within the area of the cell. The goal was to provide backgroun...

165

IDENTIFYING THE CAUSE OF HIGH CONCENTRATIONS OF TBA IN GROUNDWATER AT GASOLINE SPIILL SITES IN ORANGE COUNTY, CALIFORNIA  

EPA Science Inventory

Monitoring at gasoline spills in Orange County, California has revealed that TBA (tertiary butyl alcohol) is often present at high concentrations in ground water. To manage the hazard associated with the presence of TBA, staff of the UST Local Oversight Program (LOP) of the Oran...

166

An outbreak of chancroid in Orange County, California: descriptive epidemiology and disease-control measures.  

PubMed

From May 1981 through February 1983, greater than 1,700 patients were examined for genital ulcers at the Orange County Special Diseases Clinic in Santa Ana, California. Of these patients, 923 had either confirmed chancroid or genital ulcers of unknown etiology. Haemophilus ducreyi was recovered from lesions or inguinal buboes of 271 patients. In the previous year, no cases of chancroid were reported in this community. Men accounted for 266 (98%) of the confirmed cases; 95% of the men were Hispanic, and at least 53% had had sexual contact with a prostitute. All five culture-positive women were prostitutes. Antimicrobial sensitivity testing showed resistance to both sulfamethoxazole and tetracycline but susceptibility to erythromycin and to the combination trimethoprim-sulfamethoxazole. Treatment of patients with chancroid, their sex partners, and temporarily incarcerated prostitutes contributed to the successful control of this outbreak. PMID:2985711

Blackmore, C A; Limpakarnjanarat, K; Rigau-Pérez, J G; Albritton, W L; Greenwood, J R

1985-05-01

167

A critical assessment of the Burning Index in Los Angeles County, California  

USGS Publications Warehouse

The Burning Index (BI) is commonly used as a predictor of wildfire activity. An examination of data on the BI and wildfires in Los Angeles County, California, from January 1976 to December 2000 reveals that although the BI is positively associated with wildfire occurrence, its predictive value is quite limited. Wind speed alone has a higher correlation with burn area than BI, for instance, and a simple alternative point process model using wind speed, relative humidity, precipitation and temperature well outperforms the BI in terms of predictive power. The BI is generally far too high in winter and too low in fall, and may exaggerate the impact of individual variables such as wind speed or temperature during times when other variables, such as precipitation or relative humidity, render the environment ill suited for wildfires. ?? IAWF 2007.

Schoenberg, F.P.; Chang, H.-C.; Keeley, J.E.; Pompa, J.; Woods, J.; Xu, H.

2007-01-01

168

Humboldt State University Fisheries Biology  

NSDL National Science Digital Library

The Fisheries Science Department of Humboldt State University offers an interdisciplinary Bachelor of Sciences degree in Aquarium Sciences. To prepare for a career as a professional aquarist or aquarium curator, training includes: husbandry, culture of aquatic organisms, ichthyology, pathology, life support, exhibit design, conservation, business management. Internships with major public aquariums are available.

2010-11-18

169

Analysis of VOC data in support of pollutant transport studies in Shasta County, California  

SciTech Connect

The Shasta County Air Pollution Control District (California) has funded a study to investigate the origin and extent of ozone and ozone precursor concentrations that are due to upwind transport. As a part of the study, air quality measurements were made aloft during September 1995. Hydrocarbon measurements were made aloft for use as tracers of opportunity for analyzing the source of the air mass. Total nonmethane hydrocarbon, speciated hydrocarbons, and {open_quotes}exotics{close_quotes} including Freon 12, Freon 11, Freon 113, chloroform, 1,1,1-trichloroethane, carbon tetrachloride, trichlorethylene, and perchloroethylene were quantified. In earlier studies of transport in this region, a hydrocarbon and exotic species signature for the Sacramento metropolitan area was identified. This signature was compared to the signatures developed from samples collected in Shasta County to determine evidence of transport. The relative age of air parcels entering the area were also determined using the ratios of more reactive species to less reactive species concentrations; lower ratios correspond to more aged hydrocarbon mixtures. This paper discusses the analyses of the hydrocarbon and exotics data and the implications of the results to transport in the region. 5 refs., 4 figs., 1 tab.

Main, H.H.; Chinkin, L.R.; Roberts, P.T. [Sonoma Technology, Inc., Santa Rosa, CA (United States)

1996-12-31

170

Water-Quality Data for the Lower Russian River Basin, Sonoma County, California, 2003-2004  

USGS Publications Warehouse

In 2003, the U.S. Geological Survey, in cooperation with the Sonoma County Water Agency, began a study to determine the chemical, microbiological, and isotopic composition of the surface water and ground water in selected areas of the Lower Russian River Basin, Sonoma County, California. This report is a compilation of the hydrologic and water-quality data collected from 10 Russian River sites, 1 gravel-terrace pit site, 12 ground-water sites, 11 tributary sites including Mark West Creek, and 2 estuary sites between the city of Healdsburg and the Pacific Ocean, for the period August 2003 to September 2004. Field measurements made included streamflow, barometric pressure, dissolved oxygen, pH, specific conductance, and turbidity. Water samples were analyzed for nutrients, major ions, total and dissolved organic carbon, trace elements, mercury, wastewater compounds, total coliform, Escherichia coli, Enterococci, Clostridium perfringens, and the stable isotopes of hydrogen and oxygen. Discharge measurements and sampling techniques were modified to accommodate the very low summer flows at most of the tributaries, and discharge measurements were made with an acoustic Doppler velocity meter at the estuary river site to overcome the complexities associated with tidal influences.

Anders, Robert; Davidek, Karl; Koczot, Kathryn M.

2006-01-01

171

Persistence of mosquito-borne viruses in Kern County, California, 1983-1988.  

PubMed

The persistence of arboviruses was studied from 1983 to 1988 in mixed agriculture, marsh, riparian, and foothill habitats in Kern County, CA. Western equine encephalomyelitis (WEE) virus was isolated frequently during 1983 from Culex tarsalis and Aedes melanimon and was detected by the seroconversion of sentinel chickens. WEE virus then disappeared, even though vector competence studies during 1984-1986 showed that Cx. tarsalis was able to transmit WEE virus. St. Louis encephalitis (SLE) virus was detected sporadically in 3 of the 6 years of the study by isolation from Cx. tarsalis and/or by sentinel chicken seroconversion. When mosquito pools were screened for virus in suckling mice, Turlock (TUR) and Hart Park (HP) viruses were isolated from Cx. tarsalis during each summer. Vertical transmission of HP was indicated by the isolation of virus from a pool of male Cx. tarsalis. California encephalitis (CE) virus was isolated repeatedly from host-seeking Ae. melanimon females, males, and adults reared from field-collected immatures, verifying vertical transmission in nature. Horizontal transmission of CE virus among both jackrabbits (Lepus californicus) and desert cottontails (Sylvilagus auduboni) appeared to amplify Ae. melanimon infection rates during the summer of 1985, but elevated herd immunity depressed infection rates during 1986. Thus, CE, HP, and TUR viruses persisted in Kern County, while WEE virus appeared to become extinct and required reintroduction. The sporadic occurrence of SLE virus activity remains unexplained, but its persistence may require both vertical transmission and reintroduction. PMID:2240370

Reisen, W K; Hardy, J L; Reeves, W C; Presser, S B; Milby, M M; Meyer, R P

1990-10-01

172

Hydrologic and geochemical characterization of the Santa Rosa Plain watershed, Sonoma County, California  

USGS Publications Warehouse

The Santa Rosa Plain is home to approximately half of the population of Sonoma County, California, and faces growth in population and demand for water. Water managers are confronted with the challenge of meeting the increasing water demand with a combination of water sources, including local groundwater, whose future availability could be uncertain. To meet this challenge, water managers are seeking to acquire the knowledge and tools needed to understand the likely effects of future groundwater development in the Santa Rosa Plain and to identify efficient strategies for surface- and groundwater management that will ensure the long-term viability of the water supply. The U.S. Geological Survey, in cooperation with the Sonoma County Water Agency and other stakeholders in the area (cities of Cotati, Rohnert Park, Santa Rosa, and Sebastopol, town of Windsor, Cal-American Water Company, and the County of Sonoma), undertook this study to characterize the hydrology of the Santa Rosa Plain and to develop tools to better understand and manage the groundwater system. The objectives of the study are: (1) to develop an updated assessment of the hydrogeology and geochemistry of the Santa Rosa Plain; (2) to develop a fully coupled surface-water and groundwater-flow model for the Santa Rosa Plain watershed; and (3) to evaluate the potential hydrologic effects of alternative groundwater-management strategies for the basin. The purpose of this report is to describe the surface-water and groundwater hydrology, hydrogeology, and water-quality characteristics of the Santa Rosa Plain watershed and to develop a conceptual model of the hydrologic system in support of the first objective. The results from completing the second and third objectives will be described in a separate report.

Nishikawa, Tracy

2013-01-01

173

78 FR 53711 - Revisions to the California State Implementation Plan, Placer, Santa Barbara and Ventura County...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Santa Barbara and Ventura County Air Pollution Control Districts AGENCY: Environmental...revisions to the Placer County Air Pollution Control District (PCAPCD), Santa Barbara County Air Pollution Control District (SBCAPCD)...

2013-08-30

174

Late Pleistocene sediments and fossils near the mouth of Mad River, Humboldt County, California: Facies analysis, sequence development, and possible age correlation  

SciTech Connect

Study of late Pleistocene-age sediments near the mouth of the Mad River revealed a sequence of nearshore marine and shallow bay deposits. This sequence, bounded by unconformities, is informally named the Mouth of Mad unit. The Mouth of mad unit can be divided into four distinct depositional facies at the study site. The lowest facies are the Nearshore Sand and Estuarine Mud, which lie unconformably on a paleosol. The sand facies grades upward into a high-energy, interbedded Nearshore Sand and Gravel facies containing storm and rip-channel deposits. Above the sand and gravel is a Strand-Plain Sand facies. This sand is overlain by a laterally variable sequence of shell-rich Bay facies. The bay deposits can be further divided into five subfacies: (1) a Bioturbated Sand; (2) a Lower Tidal Flat Mud; (3) a Mixed Sand and Mud; (4) an oyster-rich Bay Mud; and (5) an Upper Tidal Flat Mud. The bay sequence is overlain unconformably by younger late Pleistocene-age marine terrace deposits. The depositional environments represented by these facies progress from a shoreline estuary to nearshore deposits, above storm wave base, and slowly back to shoreline and finally shallow bay conditions. The Mouth of Mad unit represents a transgressive-regressive sequence, involving the development of a protective spit. The uppermost mud within the Mouth of Mad unit has been dated, using thermoluminescence age estimation, at 176 [+-] 33 ka, placing it in the late Pleistocene. The Mouth of Mad unit appears to be younger than the fossiliferous deposits at Elk Head, Crannell Junction, Trinidad Head, Moonstone Beach, and the Falor Formation near Maple Creek, and possibly time equivalent with gravel deposits exposed at the western end of School Road in McKinleyville.

Harvey, E.W. (Ohio State Univ., Columbus, OH (United States). Dept. of Geological Sciences)

1994-04-01

175

ENVIRONMENTAL AUDITING: Indicators Assessment for Habitat Conservation Plan of Yolo County, California, USA.  

PubMed

/ Whereas habitat conservation plans (HCPs) have been intended to provide comprehensive environmental mitigation for multiple species, they often narrow in focus to one species and either one mitigation site or unspecified sites. We developed an indicators framework from which to rate land units for their ecological integrity, collateral values (nonbiological qualities that can improve conservation), and restoration and conservation opportunities. The ratings of land units were guided by the tenets of conservation biology and principles of landscape and ecosystem ecology, and they were made using existing physical and floral information managed on a GIS. As an example of how the indicators approach can be used for HCPs, the 29 legally rare species targeted by the Yolo County HCP were each associated with vegetation complexes and agricultural crops, the maps of which were used for rating some of the landscape indices. The ratings were mapped so that mitigation can be directed to the places on the landscape where the legally rare species should benefit most from conservation practices. The most highly rated land units for conservation opportunity occurred along streams and sloughs, especially where they emerged from the foothills and entered the Central Valley and where the two largest creeks intersected the Sacramento River flood basin. We recommend that priority be given to mitigation or conservation at the most highly rated land units. The indices were easy to measure and can be used with other tools to monitor the mitigation success. The indicators framework can be applied to other large-area planning efforts with some modifications.KEY WORDS: Ecosystem; Indicators; Landscape; Mitigation; Planning; Yolo County; California PMID:9732523

SMALLWOOD; WILCOX; LEIDY; YARRIS

1998-11-01

176

Geologic Map and Map Database of Eastern Sonoma and Western Napa Counties, California  

USGS Publications Warehouse

Introduction This report contains a new 1:100,000-scale geologic map, derived from a set of geologic map databases (Arc-Info coverages) containing information at 1:62,500-scale resolution, and a new description of the geologic map units and structural relations in the map area. Prepared as part of the San Francisco Bay Region Mapping Project, the study area includes the north-central part of the San Francisco Bay region, and forms the final piece of the effort to generate new, digital geologic maps and map databases for an area which includes Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Santa Cruz, Solano, and Sonoma Counties. Geologic mapping in Lake County in the north-central part of the map extent was not within the scope of the Project. The map and map database integrates both previously published reports and new geologic mapping and field checking by the authors (see Sources of Data index map on the map sheet or the Arc-Info coverage eswn-so and the textfile eswn-so.txt). This report contains new ideas about the geologic structures in the map area, including the active San Andreas Fault system, as well as the geologic units and their relations. Together, the map (or map database) and the unit descriptions in this report describe the composition, distribution, and orientation of geologic materials and structures within the study area at regional scale. Regional geologic information is important for analysis of earthquake shaking, liquifaction susceptibility, landslide susceptibility, engineering materials properties, mineral resources and hazards, as well as groundwater resources and hazards. These data also assist in answering questions about the geologic history and development of the California Coast Ranges.

Graymer, R.W.; Brabb, E.E.; Jones, D.L.; Barnes, J.; Nicholson, R.S.; Stamski, R.E.

2007-01-01

177

Cooling rates and crystallization dynamics of shallow level pegmatite-aplite dikes, San Diego County, California  

USGS Publications Warehouse

Pegmatites of the Pala and Mesa Grande Pegmatite Districts, San Diego County, California are typically thin, sheet-like composite pegmatite-aplite dikes. Aplitic portions of many dikes display pronounced mineralogical layering referred to as "line rock," characterized by fine-grained, garnet-rich bands alternating with albite- and quartz-rich bands. Thermal modeling was performed for four dikes in San Diego County including the 1 m thick Himalaya dike, the 2 m thick Mission dike, the 8 m thick George Ashley dike, and the 25 m thick Stewart dike. Calculations were based on conductive cooling equations accounting for latent heat of crystallization, a melt emplacement temperature of 650 °C into 150 °C fractured, gabbroic country rock at a depth of 5 km, and an estimated 3 wt% initial H2O content in the melt. Cooling to -5 cm/s. Crystal size distribution (CSD) studies of garnet from layered aplites suggest growth rates of about 10-6 cm/s. These results indicate that the dikes cooled and crystallized rapidly, with variable nucleation rates but high overall crystal-growth rates. Initial high nucleation rates coincident with emplacement and strong undercooling can account for the millimeter-size aplite grains. Lower nucleation rates coupled with high growth rates can explain the decimeter-size minerals in the hanging walls, cores, and miarolitic cavities of the pegmatites. The presence of tourmaline and/or lepidolite throughout these dikes suggests that although the melts were initially H2O-undersaturated, high melt concentrations of incompatible (or fluxing) components such as B, F, and Li (±H2O), aided in the development of large pegmatitic crystals that grew rapidly in the short times suggested by the conductive cooling models.

Webber, Karen L.; Simmons, William B.; Falster, Alexander U.; Foord, Eugene E.

1999-01-01

178

Fluoride, nitrate and water hardness in groundwater supplied to the rural communities of Ensenada County, Baja California, Mexico  

Microsoft Academic Search

The hydrogeochemistry of 26 wells belonging to ten different aquifers in the county of Ensenada, Baja California, is studied.\\u000a These wells are all used to supply the rural communities in the region, which comprise ~37,000 inhabitants, excluding the\\u000a city of Ensenada. High total dissolved solids (TDS) concentrations (maximum 7.35 g l?1) indicate that salt is a ubiquitous contaminant in the aquifers due

L. W. Daesslé; L. Ruiz-Montoya; H. J. Tobschall; R. Chandrajith; V. F. Camacho-Ibar; L. G. Mendoza-Espinosa; A. L. Quintanilla-Montoya; K. C. Lugo-Ibarra

2009-01-01

179

Enhancing and Maintaining Water Service Quality for Metropolises: A Case Study of the City and County of San Francisco, California, USA  

Microsoft Academic Search

The City and County of San Francisco supplies treated and raw water directly or indirectly to approximately 2.4 million consumers within five California counties and at various other locations along the transmission route from its principal water source in the Sierra Nevada. From a small-scale private entity formed to meet local neighbourhood needs in 1851, the San Francisco water system

Michael D. Lee

2002-01-01

180

Mapping Mortality and Geophysical Features During a Heat Wave in Los Angeles County, California  

NASA Astrophysics Data System (ADS)

With climate change, heat waves are predicted to increase in intensity and duration, particularly in areas where they have occurred previously. Human mortality increases during heat waves, and that increase may vary by community due to a variety of factors including differing geophysical and built environment features. In July 2006, California experienced a statewide heat wave that was unprecedented in duration, lasting 10 days in much of the state, and longer in some areas. To explore heat wave health impacts by community, we focused on Los Angeles County, selected for its urban density and diverse social and geographic landscapes. We calculated the ratio of deaths during the heat wave period (July 15 - Aug 1) to deaths in reference days from the non-heat wave period in the same summer. The raw and empirical Bayes smoothed rate ratios were mapped by census tract (average population size approximately 5000). We then used spatial scanning procedures to identify census tract clusters of high and low mortality. Onto the heat mortality maps, we overlaid such geographic and built environment characteristics as elevation, recordings from temperature monitors, building climate zone boundaries, and air conditioning use. In this presentation, we will discuss the potential relationship between mortality and geophysical and built environment features. In the future, we will expand this analysis statewide and share our findings with local stakeholders to explore factors which may make their communities more resilient (low health impact) or vulnerable (high health impact). Ultimately, knowledge of vulnerability and resiliency factors may inform future applied research and climate change mitigation and adaptation strategies. Authors: Lauren Joe, Daniel Smith, Svetlana Smorodinksy, Sumi Hoshiko, Martha Harnly Environmental Health Investigations Branch, California Department of Public Health

Joe, L.

2011-12-01

181

Geologic map database of the El Mirage Lake area, San Bernardino and Los Angeles Counties, California  

USGS Publications Warehouse

This geologic map database for the El Mirage Lake area describes geologic materials for the dry lake, parts of the adjacent Shadow Mountains and Adobe Mountain, and much of the piedmont extending south from the lake upward toward the San Gabriel Mountains. This area lies within the western Mojave Desert of San Bernardino and Los Angeles Counties, southeastern California. The area is traversed by a few paved highways that service the community of El Mirage, and by numerous dirt roads that lead to outlying properties. An off-highway vehicle area established by the Bureau of Land Management encompasses the dry lake and much of the land north and east of the lake. The physiography of the area consists of the dry lake, flanking mud and sand flats and alluvial piedmonts, and a few sharp craggy mountains. This digital geologic map database, intended for use at 1:24,000-scale, describes and portrays the rock units and surficial deposits of the El Mirage Lake area. The map database was prepared to aid in a water-resource assessment of the area by providing surface geologic information with which deepergroundwater-bearing units may be understood. The area mapped covers the Shadow Mountains SE and parts of the Shadow Mountains, Adobe Mountain, and El Mirage 7.5-minute quadrangles. The map includes detailed geology of surface and bedrock deposits, which represent a significant update from previous bedrock geologic maps by Dibblee (1960) and Troxel and Gunderson (1970), and the surficial geologic map of Ponti and Burke (1980); it incorporates a fringe of the detailed bedrock mapping in the Shadow Mountains by Martin (1992). The map data were assembled as a digital database using ARC/INFO to enable wider applications than traditional paper-product geologic maps and to provide for efficient meshing with other digital data bases prepared by the U.S. Geological Survey's Southern California Areal Mapping Project.

Miller, David M.; Bedford, David R.

2000-01-01

182

A Digital Map of Susceptibility to Large Landslides in Santa Clara County, California  

NASA Astrophysics Data System (ADS)

Hillsides bordering the Santa Clara ("Silicon") Valley are prone to earthquake- and rainfall-triggered landslides. To narrow the uncertainty surrounding the location of future slope movement, we estimate the relative likelihood of landsliding at 30-m resolution from regional data sets. While small areas are evaluated accurately from detailed observations on material properties, topography, and hydrology, resource limitations force a regional, statistical, approach to mapping large areas. This is the first county-size susceptibility map prepared from the Arc/Info GIS model developed by Pike and others (2001) in the Oakland, CA, area (USGS MF-2385). Their index of susceptibility is the spatial frequency of prior slope failure for each one-degree slope interval in each geologic-map unit, obtained by combining a geologic map (a proxy for rock or soil strength) with a landslide-inventory map and a map of slope gradient. Areas in existing landslides are multiplied by an observationally derived constant, 1.33, to reflect their higher susceptibility. Santa Clara County's 170 geologic units occupy about 3,440,000 30-m grid cells. The geology is from three digital USGS maps (OF 97-710, 98-348, 98-795). The thousands of existing landslides were digitized from 13 inventories--six by the California Geological Survey, five by USGS, two by private consultants. These source maps vary in scale (mostly 1:24,000 or 1:12,000), date (1970-98), attribution of failures (most are large rock and debris slides, rock slumps, and earth flows; few are debris flows), completeness, and detail. The map of slope gradient (OF 98-766) was computed from a 30-m digital elevation model (OF 98-625). Severity of prior landsliding throughout the county strongly reflects geology--from a mean spatial frequency of zero, e.g. flat-lying Pleistocene alluvial fan and fluvial deposits, to 100%, e.g. a mudstone member of the Oligocene-Eocene San Lorenzo Formation. Values of the susceptibility index, ranging from zero (1,000,000 cells largely on the valley floor) to 1.33 (4200 cells in the most hazardous terrain), are not randomly distributed. Among large areas of highest susceptibility (>0.60) are the hills flanking Santa Clara Valley just E of the cities of San Jose, Milpitas, and Morgan Hill, as well as some terrain in the Santa Cruz Mountains.

Pike, R. J.; Sobieszczyk, S.

2002-12-01

183

Vapor-dominated reservoir exceeding 600 degrees F at The Geysers, Sonoma County, California  

SciTech Connect

A high-temperature, vapor-dominated reservoir underlies a portion of the northwest Geysers area, Sonoma County, California. The high-temperature reservoir (HTR) is defined by flowing fluid temperatures exceeding 500/sup 0/F, rock temperatures apparently exceeding 600/sup 0/F, and steam enthalpies of about 1320 Btu/lb. The HTR in the northwest Geysers is probably a deep, evolving system in contrast to the shallower, leaky, and mature steam reservoir(s) in the central and southeastern portions of the field. Before natural venting and nearby production caused pressures to decline, the HTR was a liquid-dominated system with some connate water - the connate water being the source of the high gas contents, chloride, and unique isotopic composition relative to steam from a typical Geysers reservoir. Therefore, the present boundary between the typical reservoir and HTR is a transient, thermodynamic condition due to the recent evolution of a vapor-dominated zone from a liquid-dominated zone that has yet to cool down. It also demarks a previous liquid-to-vapor interface. Pressure in the two reservoirs is essentially the same because they are in communication with each other. In other words, the temperature change in the HTR is lagging (behind) the pressure change.

Walters, M.A.; Sternfeld, J.N.; Haizlip, J.R.; Drenick, A.F.; Combs, J.

1987-06-01

184

Comments on potential geologic and seismic hazards affecting coastal Ventura County, California  

USGS Publications Warehouse

This report examines the regional seismic and geologic hazards that could affect proposed liquefied natural gas (LNG) facilities in coastal Ventura County, California. Faults throughout this area are thought to be capable of producing earthquakes of magnitude 6.5 to 7.5, which could produce surface fault offsets of as much as 15 feet. Many of these faults are sufficiently well understood to be included in the current generation of the National Seismic Hazard Maps; others may become candidates for inclusion in future revisions as research proceeds. Strong shaking is the primary hazard that causes damage from earthquakes and this area is zoned with a high level of shaking hazard. The estimated probability of a magnitude 6.5 or larger earthquake (comparable in size to the 2003 San Simeon quake) occurring in the next 30 years within 30 miles of Platform Grace is 50-60%; for Cabrillo Port, the estimate is a 35% likelihood. Combining these probabilities of earthquake occurrence with relationships that give expected ground motions yields the estimated seismic-shaking hazard. In parts of the project area, the estimated shaking hazard is as high as along the San Andreas Fault. The combination of long-period basin waves and LNG installations with large long-period resonances potentially increases this hazard.

Ross, Stephanie L.; Boore, David M.; Fisher, Michael A.; Frankel, Arthur D.; Geist, Eric L.; Hudnut, Kenneth W.; Kayen, Robert E.; Lee, Homa J.; Normark, William R.; Wong, Florence L.

2004-01-01

185

Under- and Over-Nutrition Among Refugees in San Diego County, California  

PubMed Central

Resettled refugees often arrive in their host country with little knowledge of nutrition or available food choices. We explored nutrition-related issues of recent refugee arrivals to San Diego County—the second largest California resettlement site. In-depth interviews (n = 40) were conducted with refugees, health care practitioners, and refugee service organizations. Content analysis identified nutrition-related themes. Unhealthy weight gain after arrival was the most common concern and was attributed to social pressures among adolescents, food choices and a more sedentary lifestyle. Conversely, undernutrition remained a concern due to poor diets. Factors influencing nutritional problems included continuation of past habits, acculturation, unfamiliarity with available foods and socio-economic influences. The nutritional concerns encountered by resettled refugees in San Diego are not unique to this group but are aggravated by their past experiences, and abrupt changes to food choices and behavior. Addressing contextual factors of poor food choices may prevent some of the long term health consequences of poor nutrition. PMID:20505992

Rondinelli, Amanda J.; Morris, Meghan D.; Rodwell, Timothy C.; Moser, Kathleen S.; Paida, Paulino; Popper, Steve T.

2010-01-01

186

Geology of epithermal silver-gold bulk-mining targets, bodie district, Mono County, California  

USGS Publications Warehouse

The Bodie mining district in Mono County, California, is zoned with a core polymetallic-quartz vein system and silver- and gold-bearing quartz-adularia veins north and south of the core. The veins formed as a result of repeated normal faulting during doming shortly after extrusion of felsic flows and tuffs, and the magmatic-hydrothermal event seems to span at least 2 Ma. Epithermal mineralization accompanied repeated movement of the normal faults, resulting in vein development in the planes of the faults. The veins occur in a very large area of argillic alteration. Individual mineralized structures commonly formed new fracture planes during separate fault movements, with resulting broad zones of veinlets growing in the walls of the major vein-faults. The veinlet swarms have been found to constitute a target estimated at 75,000,000 tons, averaging 0.037 ounce gold per ton. The target is amenable to bulkmining exploitation. The epithermal mineralogy is simple, with electrum being the most important precious metal mineral. The host veins are typical low-sulfide banded epithermal quartz and adularia structures that filled voids created by the faulting. Historical data show that beneficiation of the simple vein mineralogy is very efficient. ?? 1995 Oxford University Press.

Hollister, V.F.; Silberman, M.L.

1995-01-01

187

A geophysical study of the hydrogeology of the Carrizo plain area, San Luis Obispo County, California  

SciTech Connect

This investigation was conducted to attempt to locate structural geologic features and variations in aquifer characteristics in an area within the Carrizo plain, San Luis Obispo County, California. The investigation included a review of the established geologic knowledge for the region, followed by field studies. The field studies included surface magnetometer surveys, thermal borehole logging, and a piezometric level survey. Existing borehole electric logs were obtained. The conclusions of the investigation were then derived from a collective interpretation. The investigation concluded that a fault appears to extend beneath the valley fill in the northwestern part of the area, and that a subsurface basaltic dike is apparently located in the southeastern part of the area. Evaluations indicate that the valley has a deep aquifer overlain by a confining clay-rich layer in the central part of the area. Areal and depth-related variations in water quality are probably influenced by the presence of evaporites near Soda Lake and in the region near the San Andreas fault.

Cooper, J.W. (Kennedy/Jenks/Chilton, Bakersfield, CA (United States))

1991-02-01

188

Environmental assessment and finding of no significant impact: Biorecycling Technologies, Inc., Noble Biogas and Fertilizer Plant, Fresno County, California  

SciTech Connect

The US Department of Energy (DOE) is considering a proposal from the California Energy Commission for partial funding up to $1,500,000 of the construction of the biorecycling Technologies, Inc., (BTI) Noble Biogas and Fertilizer Plant in Fresno County, California. BTI along with its contractors and business partners would develop the plant, which would use manure and green waste to produce biogas and a variety of organic fertilizer products. The California Energy Commission has requested funding from the DOE Commercialization Ventures program to assist in the construction of the plant, which would produce up to one megawatt of electricity by burning biogas in a cogeneration unit. The purpose of this environmental assessment (EA) is to provide DOE and the public with information on potential environmental impacts associated with funding development of the proposed project.

NONE

1997-09-01

189

California GAMA Program: Sources and transport of nitrate in shallow groundwater in the Llagas Basin of Santa Clara County, California  

SciTech Connect

A critical component of the State Water Resource Control Board's Groundwater Ambient Monitoring and Assessment (GAMA) Program is to assess the major threats to groundwater resources that supply drinking water to Californians (Belitz et al., 2004). Nitrate is the most pervasive and intractable contaminant in California groundwater and is the focus of special studies under the GAMA program. This report presents results of a study of nitrate contamination in the aquifer beneath the cities of Morgan Hill and Gilroy, CA, in the Llagas Subbasin of Santa Clara County, where high nitrate levels affect several hundred private domestic wells. The main objectives of the study are: (1) to identify the main source(s) of nitrate that issue a flux to the shallow regional aquifer (2) to determine whether denitrification plays a role in the fate of nitrate in the subbasin and (3) to assess the impact that a nitrate management plan implemented by the local water agency has had on the flux of nitrate to the regional aquifer. Analyses of 56 well water samples for major anions and cations, nitrogen and oxygen isotopes of nitrate, dissolved excess nitrogen, tritium and groundwater age, and trace organic compounds, show that synthetic fertilizer is the most likely source of nitrate in highly contaminated wells, and that denitrification is not a significant process in the fate of nitrate in the subbasin except in the area of recycled water application. In addition to identifying contaminant sources, these methods offer a deeper understanding of how the severity and extent of contamination are affected by hydrogeology and groundwater management practices. In the Llagas subbasin, the nitrate problem is amplified in the shallow aquifer because it is highly vulnerable with high vertical recharge rates and rapid lateral transport, but the deeper aquifers are relatively more protected by laterally extensive aquitards. Artificial recharge delivers low-nitrate water and provides a means of long-term remediation. Examination of nitrate concentration in relation to groundwater age indicates that the nitrate management plan has not yet resulted in a decrease in the flux of nitrate to the shallow aquifer in the areas tested.

Moran, J E; McNab, W; Esser, B; Hudson, G; Carle, S; Beller, H; Kane, S; Tompson, A B; Letain, T; Moore, K; Eaton, G; Leif, R; Moody-Bartel, C; Singleton, M

2005-06-29

190

76 FR 67366 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Placer County Air Pollution Control District and Sacramento...revisions to the Placer County Air Pollution Control District (PCAPCD) and...52 Environmental protection, Air pollution control, Incorporation by...

2011-11-01

191

75 FR 24544 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Placer County Air Pollution Control District, Sacramento...District, San Joaquin Valley Unified Air Pollution Control District, and South Coast...revisions to the Placer County Air Pollution Control District...

2010-05-05

192

76 FR 44809 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Placer County Air Pollution Control District and Feather River...submitted for the Placer County Air Pollution Control District (PCAPCD) and...modified major stationary sources of air pollution. We are approving local...

2011-07-27

193

75 FR 56889 - Revisions to the California State Implementation Plan, San Diego County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, San Diego County Air Pollution Control District AGENCY: Environmental...revisions to the San Diego County Air Pollution Control District (SDCAPCD) portion...52 Environmental protection, Air pollution control, Incorporation by...

2010-09-17

194

75 FR 45082 - Revisions to the California State Implementation Plan, Santa Barbara County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Santa Barbara County Air Pollution Control District AGENCY: Environmental...revisions to the Santa Barbara County Air Pollution Control District (SBCAPCD) portion...52 Environmental protection, Air pollution control, Intergovernmental...

2010-08-02

195

76 FR 26192 - Revisions to the California State Implementation Plan, Northern Sonoma County Air Pollution...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Plan, Northern Sonoma County Air Pollution Control District (NSCAPCD) and...to the Northern Sonoma County Air Pollution Control District (NSCAPCD) and...52 Environmental protection, Air pollution control, Incorporation by...

2011-05-06

196

75 FR 69002 - Revisions to the California State Implementation Plan, Imperial County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Imperial County Air Pollution Control District AGENCY: Environmental...revisions to the Imperial County Air Pollution Control District (ICAPCD) portion...and San Joaquin Valley Unified Air Pollution Control District...

2010-11-10

197

75 FR 1284 - Revisions to the California State Implementation Plan, Ventura County Air Pollution Control District  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Ventura County Air Pollution Control District AGENCY: Environmental...revisions to the Ventura County Air Pollution Control District (VCAPCD) portion...52 Environmental protection, Air pollution control, Incorporation by...

2010-01-11

198

76 FR 7142 - Revisions to the California State Implementation Plan, Imperial County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Imperial County Air Pollution Control District AGENCY: Environmental...revisions to the Imperial County Air Pollution Control District (ICAPCD) portion...permitting requirements, for various air pollution sources. We are taking...

2011-02-09

199

75 FR 8008 - Revisions to the California State Implementation Plan, Imperial County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Imperial County Air Pollution Control District AGENCY: Environmental...revisions to the Imperial County Air Pollution Control District (ICAPCD) portion...SCAQMD), San Joaquin Valley Air Pollution Control District...

2010-02-23

200

76 FR 71886 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Placer County Air Pollution Control District and Sacramento...revisions to the Placer County Air Pollution Control District (PCAPCD) and...52 Environmental protection, Air pollution control, Incorporation by...

2011-11-21

201

78 FR 6736 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control District  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Placer County Air Pollution Control District AGENCY: Environmental...revisions to the Placer County Air Pollution Control District (PCAPCD) portion...rules, however, provide for Air Pollution Control Officer (APCO)...

2013-01-31

202

76 FR 28944 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Placer County Air Pollution Control District and Feather River...submitted for the Placer County Air Pollution Control District (PCAPCD) and...for new and modified sources of air pollution. If EPA finalizes the...

2011-05-19

203

76 FR 26615 - Revisions to the California State Implementation Plan, Imperial County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Implementation Plan, Imperial County Air Pollution Control District (ICAPCD) AGENCY...revisions to the Imperial County Air Pollution Control District portion of the...requirements and exemptions for various air pollution sources. We are approving...

2011-05-09

204

Documentation and description of the digital spatial data base for southern California Regional Aquifer-System Analysis Program, Santa Clara-Calleguas Basin, Ventura County, California  

USGS Publications Warehouse

This report documents the geographic information system map layers and data files generated for the Santa Clara-Calleguas Basin, Ventura County, as part of a Regional Aquifer- System Analysis of southern California from 1989 to 1995. Thirty-six map layers and four data files are maintained in this geographic information system data base. The map layers cover the Santa Clara-Calleguas drainage basin and are stored in a common map projection. Attributes of the map layers and data files are described and referenced. The map layers are grouped by geography, geology, and hydrology.

Predmore, Steven K.; Koczot, Kathryn M.; Paybins, Katherine S.

1997-01-01

205

Evaluating Channel Head Conditions for Environmental Impact Assessment in Northwestern Sonoma County, California  

NASA Astrophysics Data System (ADS)

Erosion and sedimentation have been identified as processes significantly affecting water quality in northern California Coast Range watersheds. These watersheds, including the Gualala River watershed in northwestern Sonoma County, have been designated as having water quality impaired by sediment under provisions of the Clean Water Act Section 303(d). A study was performed to estimate potential increases in erosion rates resulting from proposed vineyard development of ridge top forestland in the Gualala River watershed. The study area has an extensive history of logging, with substantial ground disturbance from tractors. The study area is characterized by flat ridge tops with steeply incised drainages shaped by debris slides, rock slides and earth flows. Jurassic age sedimentary and meta-sedimentary rocks of the coastal and central belt Franciscan formation comprise the underlying bedrock. Channel head development and advancement has long been understood to play a key role in sediment delivery and is possibly the most sensitive to changes in the external factors such as changes in climate or land use (Dietrich and Dunne 1993). Quantifying the amount of sediment contributed by potential channel head incision and/or initiation is an objective of environmental analysis for the project. Field surveys were performed during the field seasons of 2005 and 2006 to acquire measurements of channel head locations and slope, channel dimensions and substrate associated with the proposed development sites. Analysis of this field data, including the use of ArcGIS, allowed us to examine the local relationships between variables that influence channel initiation. Variables considered include drainage area, slope, soil type, geology and vegetation. An initial analysis of a selection of area-slope data failed to produce an inverse area-slope relationship as has been found in previous studies by Montgomery and Dietrich (1988). A more complete evaluation of the entire data set is presented here.

Sherwood, M. N.; O'Connor, M.; Pennington, R.

2007-12-01

206

Preliminary isostatic gravity map of the Sonoma volcanic field and vicinity, Sonoma and Napa Counties, California  

USGS Publications Warehouse

This isostatic residual gravity map is part of a three-dimensional mapping effort focused on the subsurface distribution of rocks of the Sonoma volcanic field in Napa and Sonoma counties, northern California. This map will serve as a basis for modeling the shapes of basins beneath the Santa Rosa Plain and Napa and Sonoma Valleys, and for determining the location and geometry of faults within the area. Local spatial variations in the Earth's gravity field (after accounting for variations caused by elevation, terrain, and deep crustal structure explained below) reflect the distribution of densities in the mid to upper crust. Densities often can be related to rock type, and abrupt spatial changes in density commonly mark lithologic boundaries. High-density basement rocks exposed within the northern San Francisco Bay area include those of the Mesozoic Franciscan Complex and Great Valley Sequence present in the mountainous areas of the quadrangle. Alluvial sediment and Tertiary sedimentary rocks are characterized by low densities. However, with increasing depth of burial and age, the densities of these rocks may become indistinguishable from those of basement rocks. Tertiary volcanic rocks are characterized by a wide range in densities, but, on average, are less dense than the Mesozoic basement rocks. Isostatic residual gravity values within the map area range from about -41 mGal over San Pablo Bay to about 11 mGal near Greeg Mountain 10 km east of St. Helena. Steep linear gravity gradients are coincident with the traces of several Quaternary strike-slip faults, most notably along the West Napa fault bounding the west side of Napa Valley, the projection of the Hayward fault in San Pablo Bay, the Maacama Fault, and the Rodgers Creek fault in the vicinity of Santa Rosa. These gradients result from juxtaposing dense basement rocks against thick Tertiary volcanic and sedimentary rocks.

Langenheim, V.E.; Roberts, C.W.; McCabe, C.A.; McPhee, D.K.; Tilden, J.E.; Jachens, R.C.

2006-01-01

207

Habitat restoration plan for Naval Petroleum Reserve No. 1, Kern County, California  

SciTech Connect

In 1976 Congress directed that production on the US Department of Energy's (DOE) Naval Petroleum Reserve No. 1 (NPR-1) in Kern County, California, be increased to the maximum efficient rate to fulfill some United States needs for domestic oil and gas. The US Fish and Wildlife Service (FWS) issued a Biological Opinion, required under the Endangered Species Act of 1973, that proposed construction activities on NPR-1 would jeopardize the continued existence of the endangered San Joaquin kit fox (Vulpes macrotis mutica) and blunt-nosed leopard lizard (Gambelia silus) and damage their critical habitats. One of the reasonable and prudent alternatives that the FWS required if the project were to proceed was that DOE prepare this plan to restore disturbed habitats. The plan was based on published information and the results of habitat restoration studies conducted on NPR-1 between 1981 and 1983. Preconstruction surveys will be used to insure that new disturbances are the minimum size necessary, topsoil is salvaged, and engineering practices are implemented to control soil erosion and enhance revegetation. Existing disturbances will be located, inventoried, classified, and restored using existing guidelines. Native and naturalized plant seeds will be harvested and cultivated; shrub seedlings will be grown in containers suitable for transplantation. An inventory of disturbances, results of preconstruction activities, inventory of topsoil reserves, changes in habitat quality, uses of herbicides and toxic substances, and program costs will be monitored and used to document progress and evaluate the success of the program. Results of the program will be documented in an annual report, at technical information meetings and published in DOE topical reports and scientific journals. 46 refs., 1 fig. 4 tabs.

O'Farrell, T.P.; Mitchell, D.L.

1985-10-01

208

Wildlife management plan, Naval Petroleum Reserve No. 1, Kern County, California  

SciTech Connect

Under the Naval Petroleum Act of 1976, Congress directed the Secretary of the Navy and subsequently the Secretary of Energy, to produce petroleum products from Naval Petroleum Reserve No. 1 (NPR-1) in Kern County, California, at the maximum efficient rate consistent with sound engineering practices. Because of the presence of two endangered species and the quality, quantity, and contiguous nature of habitat on NPR-1, the area is unique and management of its resources deserves special attention. The purpose of this wildlife management plan is to: (1) draw together specific information on NPR-1 wildlife resources; (2) suggest management goals that could be implemented, which if achieved, would result in diverse, healthy wildlife populations; and (3) reinitiate cooperative agreements between the US Department of Energy (DOE) and other conservation organizations regarding the management of wildlife on NPR-1. NPR-1 supports an abundant and diverse vertebrate fauna. Twenty-five mammalian, 92 avian, eight reptilian, and two amphibian species have been observed on Elk Hills. Of these, three are endangered (San Joaquin kit fox, Vulpes macrotis mutica; giant kangaroo rat, Dipodomys ingens; blunt-nosed leopard lizard, Gambelia silus). Nine vertebrates, six invertebrates, and four plant species known to occur or suspected of occurring on Elk Hills are potential candidates for listing. A major objective of this management plan is to minimize the impact of petroleum development activities on the San Joaquin kit fox, giant kangaroo rat, blunt-nosed leopard lizard, and their essential habitats. This will mainly be achieved by monitoring the status of these species and their habitat and by restoring disturbed habitats. In general, management policies designed to benefit the above three species and other species of concern will also benefit other wildlife inhabiting NPR-1.

O'Farrell, T.P.; Scrivner, J.H.

1987-01-01

209

Report of endangered species studies on Naval Petroleum Reserve No. 2, Kern County, California  

SciTech Connect

Between 1983 and 1986 the size of the population of San Joaquin kit foxes (Vulpes macrotis mutica) on Naval Petroleum Reserve No. 2 (NPR-2), Kern County, California, was estimated semiannually using capture-recapture techniques. Although summer population estimates varied between 222 in 1983 and 121 in 1986, and winter estimates varies between 258 in 1984 and 91 in 1983, the population appeared to remain relatively stable at an apparent norm of 165. Kit foxes were abundant even in the intensely developed areas, and numbers and densities (1.12 to 2.49/sq mile) were consistently higher on NPR-2 than on neighboring NPR-1. The percentage of adult vixens that successfully raised pups was 55%, average litter size was 4.0 +- 0.0, and the sex ratio (M:F) of 25 pups was 1:1.5. Most (45.2%) foxes were killed by coyotes (Canis latrans), vehicles killed 6.4%, and 6.5% died of other causes. A cause could not be determined for 41.9% of the deaths. There was a general increase in coyote visitation rates at scent stations, but kit fox visitation rates generally decreased. Kit fox indices were consistently higher on NPR-2 than on NPR-1. Approximately 15% of the kit foxes on NPR-2 dispersed an average of 2.2 +- 0.2 miles. Average dispersal distance did not differ between the sexes. The longest dispersal was 6.9 miles. Proportionately more male than female pups dispersed. Remains of lagomorphs (jackrabbits and cottontails) and kangaroo rats had the highest frequency of occurrence in scats. Frequency of occurrence of lagomorph remains was greater in developed than in undeveloped habitats. Proportions of lagomorph remains increased and kangaroo rat remains decreased between 1983 and 1984. 62 refs., 9 figs., 24 tabs.

O'Farrell, T.P.; Warrick, G.D.; Mathews, N.E.; Kato, T.T.

1987-09-01

210

Inventory of San Joaquin kit fox on land proposed as Phase II, Kesterson Reservoir, Merced County, California  

SciTech Connect

A survey of potential San Joaquin kit fox, Vulpes macrotis mutica, habitat was conducted for the US Department of the Interior Water and Power Resource Service between 23 and 25 March 1981 on lands proposed as Phase II, Kesterson Reservoir, Merced County, California. Results of ground transects covering approximately 3000 acres revealed no sign (dens, tracks, or scats) of kit fox. No kit fox were observed during four night spotlight surveys. Neither completion of Phase II nor subsequent operation and maintenance activities will have any known negative impact on the endangered San Joaquin kit fox.

McCue, P.; Kato, T.; Sauls, M.L.; O'Farrell, T.P.

1981-04-01

211

Summary and evaluation of the coyote control program, Naval Petroleum Reserve No. 1, Kern County, California, 1986  

SciTech Connect

For the second consecutive year (1986) the US Department of Energy funded a coyote (Canis latrans) control program in an attempt to reduce predation of the endangered San Joaquin kit fox (Vulpes macrotis mutica) on Naval Petroleum Reserve No. 1 in Kern County, California. A total of 46 adult and 18 pups were taken. Trapping was the most productive control method. Data were gathered on standard measurements, weights, ages, and reproductive condition of the coyotes. No kit foxes were trapped. Recommendations were made to begin the 1986/1987 control program in December 1986, and to use helicopters for aerial gunning and to locate coyote dens.

Scrivner, J.H.; Harris, C.E.

1986-11-01

212

Airborne radioactivity surveys in the Mojave Desert region, Kern, Riverside, and San Bernardino Counties, California  

USGS Publications Warehouse

Airborne radioactivity surveys in the Mojave Desert region Kern, Riverside, and Bernardino counties were made in five areas recommended as favorable for the occurrence of radioactive raw materials: (1) Rock Corral area, San Bernardino County. (2) Searles Station area, Kern county. (3) Soledad area, Kern County. (4) White Tank area, Riverside and San Bernardino counties. (5) Harvard Hills area, San Bernardino County. Anomalous radiation was detected in all but the Harvard Hills area. The radioactivity anomalies detected in the Rock Corral area are of the greatest amplitude yet recorded by the airborne equipment over natural sources. The activity is apparently attributable to the thorium-beating mineral associated with roof pendants of crystalline metamorphic rocks in a granitic intrusive. In the Searles Station, Soledad, and White Tank area, several radioactivity anomalies of medium amplitude were recorded, suggesting possible local concentrations of radioactive minerals.

Moxham, Robert M.

1952-01-01

213

Location of odor sources and the affected population in Imperial County, California  

SciTech Connect

This report is divided into four sections. The first two sections contain general background information on Imperial County. The third section is a general discussion of odor sources in Imperial County, and the fourth maps the specific odor sources, the expected areas of perception, and the affected populations. this mapping is done for the Imperial Valley and each of the four Imperial County KGRA's (Known Geothermal Resource Areas) where odor from the development of the geothermal energy may affect population.

Hahn, J.L.

1981-08-01

214

Preliminary geologic map of the Big Bear City 7.5' Quadrangle, San Bernardino County, California  

USGS Publications Warehouse

This data set maps and describes the geology of the Big Bear City 7.5' quadrangle, San Bernardino County, California. Created using Environmental Systems Research Institute's ARC/INFO software, the data base consists of the following items: (1) a rock-unit coverage and attribute tables (polygon and arc) containing geologic contacts, units and rock-unit labels as annotation which are also included in a separate annotation coverage, bbc_anno (2) a point coverage containing structural point data and (3) a coverage containing fold axes. In addition, the data set includes the following graphic and text products: (1) A PostScript graphic plot-file containing the geologic map, topography, cultural data, a Correlation of Map Units (CMU) diagram, a Description of Map Units (DMU), an index map, a regional geologic and structure map, and an explanation for point and line symbols; (2) PDF files of the Readme (including the metadata file as an appendix), and a screen graphic of the plot produced by the PostScript plot file. The geologic map describes a geologically complex area on the north side of the San Bernardino Mountains. Bedrock units in the Big Bear City quadrangle are dominated by (1) large Cretaceous granitic bodies ranging in composition from monzogranite to gabbro, (2) metamorphosed sedimentary rocks ranging in age from late Paleozoic to late Proterozoic, and (3) Middle Proterozoic gneiss. These rocks are complexly deformed by normal, reverse, and thrust faults, and in places are tightly folded. The geologic map database contains original U.S. Geological Survey data generated by detailed field observation and by interpretation of aerial photographs. The map data was compiled on base-stable cronoflex copies of the Big Bear City 7.5' topographic map, transferred to a scribe-guide and subsequently digitized. Lines, points, and polygons were edited at the USGS using standard ARC/INFO commands. Digitizing and editing artifacts significant enough to display at a scale of 1:24,000 were corrected. Within the database, geologic contacts are represented as lines (arcs), geologic units as polygons, and site-specific data as points. Polygon, arc, and point attribute tables (.pat, .aat, and .pat, respectively) uniquely identify each geologic datum.

Miller, Fred K.; digital preparation by Cossette, Pamela M.

2004-01-01

215

Late Cenozoic geology and lacustrine history of Searles Valley, Inyo and San Bernardino Counties, California  

NASA Astrophysics Data System (ADS)

George Smith’s career-long study of the surface geology of the Searles Valley was recently published by the USGS (Smith, 2009, online and printed). The co-authors of this abstract are the team responsible for completing the publication from the original materials. Searles Valley is an arid, closed basin lying 70 km east of the south end of the Sierra Nevada, California. During those parts of late Pliocene and Pleistocene time when precipitation and runoff from the east side of the Sierra Nevada into the Owens River were much greater than at present, a chain of as many as five large lakes was created, of which Searles Lake was third. The stratigraphic record left in Searles Valley when that lake expanded, contracted, or desiccated is fully revealed by cores taken from beneath the surface of Searles (dry) Lake and partly recorded by sediments cropping out around the edge of the valley. Although this outcrop record is discontinuous, it provides direct evidence of the lake’s water depths during each expansion, which the subsurface record does not. Maximum-depth lakes rose to the 2,280-ft (695 m) contour, the level of the spillway that led overflowing waters to Panamint Valley; that spillway is about 660 ft (200 m) above the present dry-lake surface. Most of this study concerns sediments of the newly described Searles Lake Formation, whose deposition spanned the period between about 150 ka and 2 ka. The outcrop record is documented in six geologic maps (scales: 1:50,000 and 1:10,000). The Searles Lake Formation is divided into seven main units. The depositional intervals of the units that make up the Searles Lake Formation are determined primarily by correlation with subsurface deposits that are dated by radiocarbon ages on organic carbon and U-series dates on salts. Shorelines, the most obvious geologic expressions of former lakes, are abundant around Searles Valley. Erosional shorelines have cut as much as 100 m into brecciated bedrock; depositional shorelines (beaches or tufa benches) are common, but their deposits tend to be thin. Combining the subsurface evidence of lake history with the outcrop record allows the history of lake fluctuations to be reconstructed for the period between about 150 ka and the present. Translating this record of lake fluctuations into paleohydrologic and paleoclimatic histories is complicated by uncertainties as to which of the several components of climate affected runoff volumes and lake-surface evaporation. A simplified model, however, suggests that the flow of the Owens River stayed between 2.5 and 4.5 times its present flow volume for most of the past 150 ky. Its flow exceeded this range only about 14 percent of the time, and it fell below this range only 4 percent of the time—which includes the present. In fact, the past 10 ky is clearly the driest period during the past 150 ky in the Owens River drainage. Smith, G.I., 2009, Late Cenozoic geology and lacustrine history of Searles Valley, Inyo and San Bernardino Counties, California: U.S. Geological Survey Professional Paper 1727, 115 p., 4 plates.

Nathenson, M.; Smith, G. I.; Robinson, J. E.; Stauffer, P. H.; Zigler, J. L.

2010-12-01

216

Spatial and Temporal Variability of Hydraulic Properties in the Russian River Streambed, Central Sonoma County, California  

Microsoft Academic Search

The reach of the Russian River flowing through Sonoma County, CA, is important to fisheries and recreations, as well as being essential to the water resources infrastructure of the county. An improved understanding of the manner in which streambed sediments impact rates of ground-water recharge is essential in optimizing withdrawals without increasing potential impacts on fishery habitats and recreational needs.

P. D. Gorman; J. Constantz; M. J. Laforce

2007-01-01

217

Genetic analysis of invasive Aedes albopictus populations in Los Angeles County, California and its potential public health impact.  

PubMed

The Asian tiger mosquito, Aedes albopictus, is an anthropophilic aggressive daytime-biting nuisance and an efficient vector of certain arboviruses and filarial nematodes. Over the last 30 years, this species has spread rapidly through human travel and commerce from its native tropical forests of Asia to every continent except Antarctica. In 2011, a population of Asian tiger mosquito (Aedes albopictus) was discovered in Los Angeles (LA) County, California. To determine the probable origin of this invasive species, the genetic structure of the population was compared against 11 populations from the United States and abroad, as well as preserved specimens from a 2001 introduction into California using the mitochondrial cytochrome c oxidase 1 (CO1) gene. A total of 66 haplotypes were detected among samples and were divided into three main groups. Aedes albopictus collected in 2001 and 2011 from LA County were genetically related and similar to those from Asia but distinct from those collected in the eastern and southeastern United States. In view of the high genetic similarities between the 2001 and 2011 LA samples, it is possible that the 2011 population represents in part the descendants of the 2001 introduction. There remains an imperative need for improved surveillance and control strategies for this species. PMID:23861921

Zhong, Daibin; Lo, Eugenia; Hu, Renjie; Metzger, Marco E; Cummings, Robert; Bonizzoni, Mariangela; Fujioka, Kenn K; Sorvillo, Teresa E; Kluh, Susanne; Healy, Sean P; Fredregill, Chris; Kramer, Vicki L; Chen, Xiaoguang; Yan, Guiyun

2013-01-01

218

Genetic Analysis of Invasive Aedes albopictus Populations in Los Angeles County, California and Its Potential Public Health Impact  

PubMed Central

The Asian tiger mosquito, Aedes albopictus, is an anthropophilic aggressive daytime-biting nuisance and an efficient vector of certain arboviruses and filarial nematodes. Over the last 30 years, this species has spread rapidly through human travel and commerce from its native tropical forests of Asia to every continent except Antarctica. In 2011, a population of Asian tiger mosquito (Aedes albopictus) was discovered in Los Angeles (LA) County, California. To determine the probable origin of this invasive species, the genetic structure of the population was compared against 11 populations from the United States and abroad, as well as preserved specimens from a 2001 introduction into California using the mitochondrial cytochrome c oxidase 1 (CO1) gene. A total of 66 haplotypes were detected among samples and were divided into three main groups. Aedes albopictus collected in 2001 and 2011 from LA County were genetically related and similar to those from Asia but distinct from those collected in the eastern and southeastern United States. In view of the high genetic similarities between the 2001 and 2011 LA samples, it is possible that the 2011 population represents in part the descendants of the 2001 introduction. There remains an imperative need for improved surveillance and control strategies for this species. PMID:23861921

Zhong, Daibin; Lo, Eugenia; Hu, Renjie; Metzger, Marco E.; Cummings, Robert; Bonizzoni, Mariangela; Fujioka, Kenn K.; Sorvillo, Teresa E.; Kluh, Susanne; Healy, Sean P.; Fredregill, Chris; Kramer, Vicki L.; Chen, Xiaoguang; Yan, Guiyun

2013-01-01

219

Improving planting stock quality: The humboldt experience. Forest Service general technical report (Final)  

SciTech Connect

A seedling testing program was developed to improve the survival and growth potential of planting stock produced in the USDA Forest Service Humboldt Nursery, situated on the Pacific Coast in northern California. Coastal and inland seed sources of Douglas-fir and eight other conifers in the Pacific Slope forests of western Oregon and northern California were assessed in both nursery and field studies. Seedling top and root growth capacities were evaluated just after lifting and after cold storage, and stored seedlings were tested for suvival and growth on cleared planting sites in the seed zones of origin. Safe lifting and cold storage schedules were defined, and seedling cultural regimes were formulated to produce successful 1-0, 1-1, and 2-0 stock types. Testing deomonstrated the critical elements of reforestation and proved that rapid establishment is attainable on diverse sites. Accomplishments of the Humboldt program recommended similar programs for other forest nurseries and their service regions.

Jenkinson, J.L.; Nelson, J.A.; Huddleston, M.E.

1993-05-01

220

Canine heartworm (Dirofilaria immitis) in Fresno and Madera Counties, California: prevalence differences between foothill and valley habitats.  

PubMed

The aim of this study was to assess the prevalence of heartworm in domestic dogs in Madera and Fresno Counties, California, dependent on habitat and other host and environmental factors. Dogs were screened for presence of heartworm antigen using the PetChek(®) ELISA on blood samples (N=519) collected at seven sites during April-July 2009. Eighteen dogs were heartworm antigen positive. Pearson Chi-square analyses were conducted testing the presence of heartworm antigen against the following independent variables: elevation range, percentage of time spent outdoors during the day, percentage of time spent outdoors during the night, pet coat length, weight class, prevention status, and sex. Dogs that spent at least 50% of their time outdoors during the day were significantly more likely to have heartworm that those who spent less time outside (N=519, df=1, p=0.031). Overall prevalence (3.47%) was lower than expected, with Madera County having 3.8% positive samples and Fresno County 3.5%; this prevalence is lower than in many previous studies. The effect of time spent outdoors on heartworm prevalence was similar to previous studies. The impact of elevation on infection, though not significant, requires further investigation, as does the prevalence and viability of larval stages in mosquitoes. PMID:21051149

Miller, Laura L; Crosbie, Paul R

2011-01-10

221

Report of the Preliminary Archaeological Reconnaissance of the Lawrence Livermore Laboratory Site 300, San Joaquin County, California  

SciTech Connect

The area subject to this investigation is the existing Lawrence Livermore Laboratory Site 300, located in the region north of Corral Hollow; approximately eight and one half miles southwest of Tracy, San Joaquin County, California. Cartographic location can be determined from the Tracy and Midway USGS 7.5 minute topographic quadrangles, the appropriate portions of which are herein reproduced as Maps 1 and 2. The majority of the approximate 7000 acres of the location lies within San Joaquin County. This includes all of the area arbitrarily designated the 'Eastern Portion' on Map 2 and the majority of the area designated the 'Western Portion' on Map 1. The remaining acreage, along the western boundary of the location, lies within Alameda County. The area is located in the region of open rolling hills immediately north of Corral Hollow, and ranges in elevation from approximately 600 feet, on the flood plain of Corral Hollow Creek, to approximately 1700 feet in the northwest portion of the project location. Proposed for the area under investigation are various, unspecified improvements or modifications to the existing Site 300 facilities. Present facilities consist of scattered buildings, bunkers and magazines, utilized for testing and research purposes, including the necessary water, power, and transportation improvements to support them. The vast majority of the 7000 acres location is presently open space, utilized as buffer zones between test locations and as firing ranges.

Busby, C

2009-11-24

222

The Relationship of Pedestrian Injuries to Socioeconomic Characteristics in a Large Southern California County  

Microsoft Academic Search

Objectives: The goal of this study is to explore the relationship between pedestrian injuries and socioeconomic characteristics.Methods: Pedestrian collisions were identified in the data of the California Statewide Integrated Traffic Records System (SWITRS), which is assembled from police crash reports by the California Highway Patrol Information Services Unit. Four thousand crashes were identified and geocoded within the census tracts in

Bharath Chakravarthy; Craig L. Anderson; John Ludlow; Shahram Lotfipour; Federico E. Vaca

2010-01-01

223

77 FR 58313 - Revisions to the California State Implementation Plan, San Diego County, Antelope Valley and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Valley and Monterey Bay Unified Air Pollution Agencies AGENCY: Environmental...revisions to the San Diego County Air Pollution Control District (SDCAPCD), Monterey Bay Unified Air Pollution Control District (MBUAPCD)...

2012-09-20

224

78 FR 59919 - Pershing County Water Conservation District; Notice of Application Accepted for Filing With the...  

Federal Register 2010, 2011, 2012, 2013, 2014

...District. e. Name of Project: Humboldt River Hydropower Project. f. Location: On the Humboldt River, near the Town of Lovelock, Pershing County, Nevada. The project would occupy 0.25 acres of Federal U.S. Bureau of Reclamation lands. g....

2013-09-30

225

Evaluation of two low-flow releases from Big Tujunga Reservoir, Los Angeles County, California, 2003  

USGS Publications Warehouse

Since 1973, the Santa Ana Sucker (Catostomus santaanae) has been listed as a threatened species under the Endangered Species Act. The Lower Big Tujunga Creek, in Los Angeles County, is one of the areas in southern California where the Santa Ana Sucker is still present. This study was designed to assess two flow releases from Big Tujunga Dam that may contribute to favorable habitat conditions for the Santa Ana Sucker. It is important for the Santa Ana Sucker's survival that pools in the lower reach of the study area are replenished periodically. The focus of the study area was on the Lower Big Tujunga Creek within a reach extending approximately 6 miles downstream from the Big Tujunga Reservoir. Six sites were established from the Big Tujunga Dam to Delta Flats day-use area for data collection. This report describes the study design, discharge measurements, and the flow data collected from the two releases. Two scheduled flows (phases 1 and 2) were released from the Big Tujunga Reservoir in August and September 2003. During the first phase, which lasted 50 hours, travel times from the dam to four sites downstream were determined. Arrival times at the four sites were determined on the basis of temperature data. Travel time from the dam to site 6 (the furthest downstream site) was about 51.5 hours. Travel times for subreaches were 3 hours from site 1 to site 2, 6.5 hours from site 2 to site 3, almost 18 hours from site 3 to site 4, and 24 hours from site 4 to site 6. The temperature probe at site 5 was destroyed, and thus the arrival time could not be estimated. A probe that measures stage was placed in one of the many pools downstream from site 4 to evaluate a typical pool response to a low-flow release. Also, discharge measurements were taken at four sites along the study reach. In phase 2, which lasted 5 days (121 hours), flow losses along the 6-mile reach were analyzed. Losses were estimated by measuring difference in flow from the dam to sites 3, 4, 5, and 6, when flow was most stable at each site or when the last measurement made before flow decreased due to flow from dam being shut off. Losses in the plunge pool, directly below the dam were assumed to be negligible for this study. Overall creek loss between the dam and site 6 (the last site) was estimated to be between 4.0 and 4.2 ft3/s (cubic feet per second). Estimated losses between the dam and intermediate sites were about 1.5 ft3/s to site 3; 2.5 ft3/s to site 4; and between 3.7 and 4.1 ft3/s to site 5.

Mendez, Gregory O.

2005-01-01

226

Treating Drug-Abusing Offenders: Initial Findings from a Five-County Study on the Impact of California's Proposition 36 on the Treatment System and Patient Outcomes  

ERIC Educational Resources Information Center

Five counties (Kern, Riverside, Sacramento, San Diego, San Francisco) that demonstrate both variations and similarities in their implementation of Proposition 36 (e.g., treatment approaches, urine testing) and patient mix have been selected to participate in a study assessing how California's Proposition 36 is affecting the drug treatment system…

Hser, Yih-Ing; Teruya, Cheryl; Evans, Elizabeth A.; Longshore, Douglas; Grella, Christine; Farabee, David

2003-01-01

227

A Study of the Job Satisfaction of Special Education Local Plan Area (SELPA) Directors and Local School District Special Education Directors in Four Counties of Southern California  

ERIC Educational Resources Information Center

Purpose. The purpose of this study was to compare the perceived level of job satisfaction of SELPA directors with that of local school district special education directors in the counties of Riverside, San Bernardino, San Diego, and Orange of Southern California and to identify factors that contribute to their job satisfaction. Additionally, this…

Alexander, Gregory Haynes, III

2009-01-01

228

Documentation of model input and output values for the geohydrology and mathematical simulation of the Pajaro Valley aquifer system, Santa Cruz and Monterey counties, California  

USGS Publications Warehouse

This report contains listings of the model input and sample output for simulation of the Pajaro Valley aquifer system, Santa Cruz and Monterey Counties, California. The files are contained on a 5 1/4-inch diskette. The decompressed files require approximately 5.3 megabytes of disk space on an IBM-compatible microcomputer. (USGS)

Mitten, H.T.; Londquist, C.J.

1990-01-01

229

Digital Compilation of "Preliminary Map of Landslide Deposits in Santa Cruz County, California, By Cooper-Clark and Associates, 1975": A Digital Map Database  

USGS Publications Warehouse

A 1:62,500-scale black-and-white map identifying some 2,000 landslides of various types in Santa Cruz County, California, has been converted to a digital-map database that can be acquired from the U.S. Geological Survey over the Internet or on magnetic tape.

Report by Roberts, Sebastian; Barron, Andrew D.; Preface by Brabb, Earl E.; Pike, Richard J.

1998-01-01

230

Recent trends in hormone therapy utilization and breast cancer incidence rates in the high incidence population of Marin County, California  

PubMed Central

Background Recent declines in invasive breast cancer have been reported in the US, with many studies linking these declines to reductions in the use of combination estrogen/progestin hormone therapy (EPHT). We evaluated the changing use of postmenopausal hormone therapy, mammography screening rates, and the decline in breast cancer incidence specifically for Marin County, California, a population with historically elevated breast cancer incidence rates. Methods The Marin Women's Study (MWS) is a community-based, prospective cohort study launched in 2006 to monitor changes in breast cancer, breast density, and personal and biologic risk factors among women living in Marin County. The MWS enrolled 1,833 women following routine screening mammography between October 2006 and July 2007. Participants completed a self-administered questionnaire that included items regarding historical hormone therapy regimen (estrogen only, progesterone only, EPHT), age of first and last use, total years of use, and reason(s) for stopping, as well as information regarding complementary hormone use. Questionnaire items were analyzed for 1,083 non-Hispanic white participants ages 50 and over. Breast cancer incidence rates were assessed overall and by tumor histology and estrogen receptor (ER) status for the years 1990-2007 using data from the Northern California Surveillance, Epidemiology and End Results (SEER) cancer registry. Results Prevalence of EPHT use among non-Hispanic white women ages 50 and over declined sharply from 21.2% in 1998 to 6.7% by 2006-07. Estrogen only use declined from 26.9% in 1998 to 22.4% by 2006-07. Invasive breast cancer incidence rates declined 33.4% between 2001 and 2004, with drops most pronounced for ER+ cancers. These rate reductions corresponded to declines of about 50 cases per year, consistent with population attributable fraction estimates for EPHT-related breast cancer. Self-reported screening mammography rates did not change during this period. Use of alternative or complementary agents did not differ significantly between ever and never hormone users. Of women who reported stopping EPHT in the past 5 years, 60% cited "health risks" or "news reports" as their primary reasons for quitting. Conclusion A dramatic reduction in EPHT use was followed temporally by a significant reduction in invasive and ER+ breast cancer rates among women living in Marin County, California. PMID:20433756

2010-01-01

231

75 FR 56942 - Revisions to the California State Implementation Plan, San Diego County Air Pollution Control...  

Federal Register 2010, 2011, 2012, 2013, 2014

...U.S. Environmental Protection Agency Region IX, 75 Hawthorne Street, San Francisco, CA 94105-3901. Instructions...regulations.gov and in hard copy at EPA Region IX, 75 Hawthorne Street, San Francisco, California. While all...

2010-09-17

232

Demographic Factors Associated With Perceptions About Water Safety and Tap Water Consumption Among Adults in Santa Clara County, California, 2011  

PubMed Central

The objective of this study was to examine differences in tap water consumption and perceptions of bottle versus tap water safety for Hispanics and non-Hispanic whites, as well as associations with other demographic characteristics. Data are from the Santa Clara County, California, Dietary Practices Survey (2011; N = 306). We used logistic regression to examine associations between demographic characteristics and 1) perceptions that bottled water is safer than tap and 2) primarily consuming tap water. Hispanics were less likely than non-Hispanic whites to primarily drink tap water (OR = 0.33; 95% CI, 0.11–0.99), although there was no significant difference in perceptions that bottled water is safer between these groups (OR = 0.50; 95% CI, 0.11–2.27). Hispanics may be an important population for interventions promoting tap water consumption. PMID:24921901

Webber, Whitney L.; Stoddard, Pamela; Shah, Roshni; Martin, Lori; Broderick, Bonnie; Induni, Marta

2014-01-01

233

Demographic factors associated with perceptions about water safety and tap water consumption among adults in Santa Clara County, California, 2011.  

PubMed

The objective of this study was to examine differences in tap water consumption and perceptions of bottle versus tap water safety for Hispanics and non-Hispanic whites, as well as associations with other demographic characteristics. Data are from the Santa Clara County, California, Dietary Practices Survey (2011; N = 306). We used logistic regression to examine associations between demographic characteristics and 1) perceptions that bottled water is safer than tap and 2) primarily consuming tap water. Hispanics were less likely than non-Hispanic whites to primarily drink tap water (OR = 0.33; 95% CI, 0.11-0.99), although there was no significant difference in perceptions that bottled water is safer between these groups (OR = 0.50; 95% CI, 0.11-2.27). Hispanics may be an important population for interventions promoting tap water consumption. PMID:24921901

van Erp, Brianna; Webber, Whitney L; Stoddard, Pamela; Shah, Roshni; Martin, Lori; Broderick, Bonnie; Induni, Marta

2014-01-01

234

Public health assessment for Frontier Fertilizer, Davis, Yolo County, California, Region 9. Cerclis No. CAD071530380. Final report  

SciTech Connect

The Frontier Fertilizer site is located near the eastern boundary of the City of Davis, in Yolo County, California. Two separate pesticide sales companies operated at the site from 1971 and 1987. Disposal of waste water and unused agricultural chemicals by these companies into an unlined basin on the property from approximately 1972 until 1983 have caused soils and groundwater contamination. In the area beneath the unlined basin, the principal contaminants of concern include dibromochloropropane (DBCP), 1,2-dichloropropane (1,2-DCP), and ethylene dibromide (EDB). Another contaminant of concern is carbon tetrahchloride, however, the source of contamination is unknown. Although much of the soil contamination was removed from the site in 1985, sampling since then indicates that substantial subsurface soil contamination still exists. An interim groundwater extraction and treatment system has been in operation at the site since January 1994.

NONE

1995-11-27

235

Cone penetration tests and soil borings at the Mason Road site in Green Valley, Solano County, California  

USGS Publications Warehouse

In support of a study to investigate the history of the Green Valley Fault, 13 cone penetration test soundings and 3 auger borings were made at the Mason Road site in Green Valley, Solano County, California. Three borings were made at or near two of the cone penetration test soundings. The soils are mostly clayey with a few sandy layers or lenses. Fine-grained soils range from low plasticity sandy lean clay to very plastic fat clay. Lack of stratigraphic correlation in the subsurface prevented us from determining whether any channels had been offset at this site. Because the soils are generally very clayey and few sand layers or lenses are loose, the liquefaction potential at the site is very low.

Bennett, Michael J.; Noce, Thomas E.; Lienkaemper, James J.

2011-01-01

236

Detection of Neorickettsia risticii from various freshwater snail species collected from a district irrigation canal in Nevada County, California.  

PubMed

This study investigated the role of a district irrigation canal in Nevada County, California, USA, as the point source of infection for Neorickettsia risticii, causative agent of equine neorickettsiosis (EN). A total of 568 freshwater snails comprising Juga spp., Planorbella subcrenata (Carpenter, 1857) (Rough Rams-horn), Physella virgata (Gould, 1855) (Protean Physa) and feces from three horses with EN were collected and tested for N. risticii by real-time PCR. A total of four freshwater snails tested PCR positive for N. risticii. Phylogenetic analysis showed 99.8-100% homology between the different snail and horse N. risticii isolates. This study represents the first report of infection with N. risticii in Planorbella subcrenata and suggests that the irrigation canal was the aquatic environment responsible for the spread of N. risticii. PMID:23566936

Pusterla, Nicola; Hagerty, Daniel; Mapes, Samantha; Vangeem, Josh; Groves, Lindsey T; Dinucci, Mario; Fielding, Langdon C; Higgins, Jill C

2013-08-01

237

Updated computations and estimates of streamflows tributary to Carson Valley, Douglas County, Nevada, and Alpine County, California, 1990-2002  

USGS Publications Warehouse

Rapid population growth in Carson Valley has caused concern over the continued availability of water resources to sustain future growth. The U.S. Geological Survey, in cooperation with Douglas County, began a study to update estimates of water-budget components in Carson Valley for current climatic conditions. Data collected at 19 sites included 9 continuous records of tributary streamflows, 1 continuous record of outflow from the valley, and 408 measurements of 10 perennially flowing but ungaged drainages. These data were compiled and analyzed to provide updated computations and estimates of streamflows tributary to Carson Valley, 1990-2002. Mean monthly and annual flows were computed from continuous records for the period 1990-2002 for five streams, and for the period available, 1990-97, for four streams. Daily mean flow from ungaged drainages was estimated using multi-variate regressions of individual discharge measurements against measured flow at selected continuous gages. From the estimated daily mean flows, monthly and annual mean flows were calculated from 1990 to 2002. These values were used to compute estimates of mean monthly and annual flows for the ungaged perennial drainages. Using the computed and estimated mean annual flows, annual unit-area runoff was computed for the perennial drainages, which ranged from 0.30 to 2.02 feet. For the period 1990-2002, estimated inflow of perennial streams tributary to Carson Valley totaled about 25,900 acre-feet per year. Inflow computed from gaged perennial drainages totaled 10,300 acre-feet per year, and estimated inflow from ungaged perennial drainages totaled 15,600 acre-feet per year. The annual flow of perennial streams ranges from 4,210 acre-feet at Clear Creek to 450 acre-feet at Stutler Canyon Creek. Differences in unit-area runoff and in the seasonal timing of flow likely are caused by differences in geologic setting, altitude, slope, or aspect of the individual drainages. The remaining drainages are ephemeral and supply inflow to the valley floor only during spring runoff in wet years or during large precipitation events. Annual unit-area runoff for the perennial drainages was used to estimate inflow from ephemeral drainages totaling 11,700 acre-feet per year. The totaled estimate of perennial and ephemeral tributary inflows to Carson Valley is 37,600 acre-feet per year. Gaged perennial inflow is 27 percent of the total, ungaged perennial inflow is 42 percent, and ephemeral inflow is 31 percent. The estimate is from 50 to 60 percent greater than three previous estimates, one made for a larger area and similar to two other estimates made for larger areas. The combined uncertainty of the estimates totaled about 33 percent of the total inflow or about 12,000 acre-feet per year.

Maurer, Douglas K.; Watkins, Sharon A.; Burrowws, Robert L.

2004-01-01

238

Health assessment for Del Norte County Pesticide Storage Area, Cresent City, Del Norte County, California, Region 9. CERCLIS No. CAD000626176. Final report  

SciTech Connect

The Del Norte County Pesticide Storage Area is located northwest of Cresent City, California. The site soils and ground water were contaminated with a myriad of pesticides and herbicides. The data also indicated an elevated concentration of chromium was present on-site and off-site; however, it does not appear to be related to the activities involving the use of the site as a pesticide storage area. The site was included on the National Priorities List in 1983. The storage area operated from 1970 until 1981, accepting containers from local agricultural and forestry-related industries. The intended use of the site was as an interim or emergency storage area for pesticide containers which had been triple rinsed and punctured prior to coming to the site. There were 9 private wells monitored within 0.50 miles of the site and the results indicated these wells were not contaminated by site contaminants. This site is of public health concern because of the potential for exposure to pesticides, herbicides, and chromium at concentrations of health concern.

Not Available

1989-04-18

239

Simulation of groundwater and surface-water resources of the Santa Rosa Plain watershed, Sonoma County, California  

USGS Publications Warehouse

Water managers in the Santa Rosa Plain face the challenge of meeting increasing water demand with a combination of Russian River water, which has uncertainties in its future availability; local groundwater resources; and ongoing and expanding recycled water and water from other conservation programs. To address this challenge, the U.S. Geological Survey, in cooperation with the Sonoma County Water Agency, the cities of Cotati, Rohnert Park, Santa Rosa, and Sebastopol, the town of Windsor, the California American Water Company, and the County of Sonoma, undertook development of a fully coupled groundwater and surface-water model to better understand and to help manage the hydrologic resources in the Santa Rosa Plain watershed. The purpose of this report is to (1) describe the construction and calibration of the fully coupled groundwater and surface-water flow model for the Santa Rosa Plain watershed, referred to as the Santa Rosa Plain hydrologic model; (2) present results from simulation of the Santa Rosa Plain hydrologic model, including water budgets, recharge distributions, streamflow, and the effect of pumping on water-budget components; and (3) present the results from using the model to evaluate the potential hydrologic effects of climate change and variability without pumpage for water years 2011-99 and with projected pumpage for water years 2011-40.

Woolfenden, Linda R.; Nishikawa, Tracy

2014-01-01

240

Finding A Place In The CountryExurban and Suburban Development in Sonoma County, California  

Microsoft Academic Search

Exurban areas are the fastest growing type of residential development in the United States. Although exurbia may represent a distinctly new settlement pattern, to date relatively little is known about why people choose to live in the exurbs. The purpose of this article is to examine the factors underlying the residential choices of suburban and exurban residents of Sonoma County,

Jeff R. Crump

2003-01-01

241

78 FR 46676 - Environmental Impact Statement; Los Angeles and San Bernardino Counties, California; Notice of...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Lancaster, CA on September 28, 2010, 6 p.m. to 8 p.m. (3) Apple Valley, CA on September 29, 2010, 6 p.m. to 8 p.m...growth and increasing population in the Antelope, Victor and Apple Valley areas of Los Angeles and San Bernardino Counties....

2013-08-01

242

Sediment transport and deposition, Walnut and Pacheco Creeks, Contra Costa County, California, August 1965-April 1970  

USGS Publications Warehouse

Average annual sediment discharge in Pacheco Creek basin, Contra Costa County, Calif., was larger during August 1965-April 1970 than the historical annual sediment discharge (1909-62) by a factor of about 1.3. This increas in sediment discharge is attributed primarily to an increased frequency of peak streamflows and to a larger average annual streamflow during the 1965-70 period.

Porterfield, George

1972-01-01

243

Survey for least bell's vireo in riparian habitat on Vandenberg Air Force Base, Santa Barbara County, California  

NASA Technical Reports Server (NTRS)

The least bell's vireo (Vireo bellii pusillus) was listed in 1986 as an endangered species by the U.S. Fish and Wildlife Service. Because of the possibility of the species existing on Vandenberg Air Force Base (VAFB), this survey was conducted to determine if they exist, and if so to prepare a distribution map of the species on the base. Major riparian areas were surveyed on foot for 17 days in April, May, and July 1987. No least bell's vireo were sighted; based on past studies, it is unlikely that there is a significant population on VAFB. There are, however, at least 13 other species of special concern that inhabit VAFB riparian woodlands. Most of these species have declined along the south coast of Santa Barbara County, and many have declined in much of the southern half of California. Riparian areas on VAFB are an important environmental resource for the southern half of California; many of these areas, however, show signs of degradation.

Breininger, David R.

1988-01-01

244

Summary and evaluation of the coyote control program on Naval Petroleum Reserve No. 1, Kern County, California, 1987  

SciTech Connect

For the third consecutive year (1987) the US Department of Energy (DOE) funded a coyote (Canis latrans) control program in an attempt to reduce coyote predation on the endangered San Joaquin kit fox (Vulpes macrotis mutica) on Naval Petroleum Reserve No. 1 (NPR-1, Elk Hills) in Kern County, California. During approximately 8 weeks of control activities, personnel from the US Department of Agriculture, Division of Animal Damage Control (ADC), removed 16 adult coyotes: 14 were trapped, 2 were shot. Data were gathered on standard measurements, weights, ages, and reproductive condition. No kit foxes were accidently trapped. Based on the results of canid scent-station surveys, the coyote population on NPR-1 declined and the kit fox population was relatively stable. Recommendations were made to conduct the 1987/1988 coyote control program between December 1987 and February 1988, use helicopters for aerial gunning and locating coyote dens, and develop a cooperative agreement between DOE, ADC, US Fish and Wildlife Service, Bureau of Land Management, and the California Department of Fish and Game to conduct the coyote control program on lands surrounding NPR-1 owned by DOE and others. 8 refs., 2 figs., 2 tabs.

Scrivner, J.H.

1987-09-01

245

Reproductive Success of Oak Woodland Birds in Sonoma and Napa Counties, California1  

Microsoft Academic Search

Birds are often used as environmental indicators because they are conspicuous, they have a very broad constituency, respond to change at multiple spatial scales, and are sampled by standard protocols. However simple counts of birds may provide an incomplete picture of the response of bird populations to environmental change in rapidly changing landscapes like California's oak woodlands. Demographic data such

Mark Reynolds; Thomas Gardali; Matt Merrifield; Robin Hirsch-Jacobsen; Amon Armstrong; David Wood; Julia Smith; Emily Heaton; Gretchen LeBuhn

246

Reservoir compaction of the Belridge Diatomite and surface subsidence, south Belridge field, Kern County, California  

Microsoft Academic Search

Surface subsidence due to reservoir compaction during production has been observed in many large oil fields. Subsidence is most obvious in coastal and offshore fields where inundation by the sea occurs. Well-known examples are Wilmington field in California and Ekofisk field in the North Sea. In South Belridge field, the Belridge Diatomite member of the late Miocene Reef Ridge Shale

J. R. Bowersox; R. A. Shore

1990-01-01

247

California County Data Book, 1999: How Our Youngest Children Are Faring.  

ERIC Educational Resources Information Center

This Kids Count Data Book examines trends in the well-being of California's children, focusing on factors influencing young children. This statistical portrait is based on trends in 19 indicators of child well-being in four areas: (1) family economics, including child poverty rate, children receiving TANF, children receiving WIC, fair market rent,…

Children Now, Oakland, CA.

248

Arsenic speciation in pyrite and secondary weathering phases, Mother Lode Gold District, Tuolumne County, California  

Microsoft Academic Search

Arsenian pyrite, formed during Cretaceous gold mineralization, is the primary source of As along the Melones fault zone in the southern Mother Lode Gold District of California. Mine tailings and associated weathering products from partially submerged inactive gold mines at Don Pedro Reservoir, on the Tuolumne River, contain ?20–1300 ppm As. The highest concentrations are in weathering crusts from the

Kaye S Savage; Tracy N Tingle; Peggy A O’Day; Glenn A Waychunas; Dennis K Bird

2000-01-01

249

Humboldt's Legacy and the Restoration of Science.  

ERIC Educational Resources Information Center

Examines issues related to specialization in science in the context of the work of Alexander Von Humboldt, one of the first popular scientists in the 19th century and Charles Darwin's mentor. Chronicles the impacts of a science dominated by specialization and argues for increased emphasis on interdisciplinary environmental study. (LZ)

Sachs, Aaron

1995-01-01

250

Chemical quality of ground water in San Joaquin and part of Contra Costa Counties, California  

USGS Publications Warehouse

Chemical water-quality conditions were investigated in San Joaquin and part of Contra Costa Counties by canvassing available wells and sampling water from 324 representative wells. Chemical water types varied, with 73 percent of the wells sampled containing either calcium-magnesium bicarbonate, or calcium-sodium bicarbonate type water. Substantial areas contain ground water exceeding water-quality standards for boron, manganese, and nitrate. Trace elements, with the exception of boron and manganese, were present in negligible amounts. (USGS)

Sorenson, Stephen K.

1981-01-01

251

78 FR 21537 - Revisions to the California State Implementation Plan, Santa Barbara and San Diego County Air...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Santa Barbara and San Diego County Air Pollution Control Districts AGENCY: Environmental...revisions to the Santa Barbara County Air Pollution Control District (SBCAPCD) and San Diego County Air Pollution Control District (SDCAPCD)...

2013-04-11

252

Geology of the Colado Geothermal Area, Pershing County, Nevada  

Microsoft Academic Search

The Colado geothermal area in south-central Pershing County, Nevada is defined by hot water wells in alluvium just west of the West Humboldt Range. Geothermal gradient holes have encountered temperatures up to 113.5°C at a depth of 76 m (250 ft) with a gradient reversal in the alluvium below this depth. The West Humboldt Range consists mainly of Triassic to

B. S. Sibbett; M. J. Bullett

1980-01-01

253

Final Report: Natural State Models of The Geysers Geothermal System, Sonoma County, California  

Microsoft Academic Search

Final project report of natural state modeling effort for The Geysers geothermal field, California. Initial models examined the liquid-dominated state of the system, based on geologic constraints and calibrated to match observed whole rock delta-O18 isotope alteration. These models demonstrated that the early system was of generally low permeability (around 10⁻¹² m²), with good hydraulic connectivity at depth (along the

T. H. Brikowski; D. L. Norton; D. D. Blackwell

2001-01-01

254

Engaging Los Angeles County subsistence anglers in the California marine protected area planning process  

Microsoft Academic Search

Ecosystem-based management is more successful when a great diversity of stakeholders is engaged early in a decision-making process. Implementation of the California Marine Life Protection Act (MLPA) has been stakeholder-based, coordinating the participation of a wide range of people including divers, fishermen, conservationists, local officials, business owners and coastal residents. Although commercial and recreational fishermen have actively participated throughout the

Charlotte Stevenson; Sarah Abramson Sikich; Mark Gold

255

Classification of ground-water recharge potential in three parts of Santa Cruz County, California  

USGS Publications Warehouse

Ground-water recharge potential was classified in the Santa Cruz coastal area, North-central area, and Soquel-Aptos area in Santa Cruz County, Calif., for three data elements that affect recharge; slope, soils, and geology. Separate numerical maps for each element were composited into a single numerical map using a classification system that ranked the numbers into areas of good , fair, and poor recharge potential. Most of the Santa Cruz coastal area and the Norht-central area have a poor recharge potential, and much of the Soquel-Aptos area has a good to fair recharge potential. (Kosco-USGS)

Muir, K.S.; Johnson, Michael J.

1979-01-01

256

Draft environmental impact report. California Department of Water Resources, Bottle Rock geothermal power plant, Lake County, CA  

SciTech Connect

The California Department of Water Resources (DWR) proposes to construct the Bottle Rock power plant, a 55 MW geothermal power plant, at The Geysers Known Geothermal Resource Area (KGRA). The plant is projected to begin operation in April of 1983, and will be located in Lake County near the Sonoma County line on approximately 7.2 acres of the Francisco leasehold. The steam to operate the power plant, approximately 1,000,000 pounds/h, will be provided by McCulloch Geothermal Corporation. The power plant's appearance and operation will be basically the same as the units in operation or under construction in the KGRA. The power plant and related facilities will consist of a 55 MW turbine generator, a 1.1 mile (1.81 km) long transmission line, a condensing system, cooling tower, electrical switchyard, gas storage facility, cistern, and an atmospheric emission control system. DWR plans to abate hydrogen sulfide (H/sub 2/S) emissions through the use of the Stretford Process which scrubs the H/sub 2/S from the condenser vent gas stream and catalytically oxides the gas to elemental sulfur. If the Stretford Process does not meet emission limitations, a secondary H/sub 2/S abatement system using hydrogen peroxide/iron catalyst is proposed. The Bottle Rock project and other existing and future geothermal projects in the KGRA may result in cumulative impacts to soils, biological resources, water quality, geothermal steam resources, air quality, public health, land use, recreation, cultural resources, and aesthetics.

Not Available

1979-12-01

257

Arc-rift transition volcanism in the Volcanic Hills, Jacumba and Coyote Mountains, San Diego and Imperial Counties, california  

NASA Astrophysics Data System (ADS)

Neogene volcanism associated with the subduction of the Farallon-Pacific spreading center and the transition from a subduction zone to a rift zone has been studied extensively in Baja, California, Mexico. One of the main goals of these studies was to find a geochemical correlation with slab windows that may have formed during that complicated transition. While workers have been able to find distinct geochemical signatures in samples from Baja California, none have shown statistically significant correlation with samples from southern California that are thought to be related to the same arc-rift transition events. All of the basaltic samples from this study of southern California rocks have prominent Nb depletions typical of island-arc subduction-related volcanism, in contrast to the chemistry of Baja California volcanics that have trace element patterns typical of synrift related volcanism. The work done by previous investigators has been additionally complicated due to each investigator's choice of important ratios or patterns, which bears little, if any, correlation with work done by others working in the same area. For example, Martin-Barajas et al. (1995) use K/Rb ratios in their study of the Puertocitos Volcanic Province, while Castillo (2008) argues that Sr/Y vs. Y is a better indicator of petrogenetic processes. Little petrologic work has been done on Neogene volcanic rocks in the Imperial Valley and eastern San Diego County region of Southern California. This thesis combines new research with that of previous workers and attempts to establish a better understanding of the processes involved with the transition volcanism. Prior work documents significant differences in the geochemistry between some of these areas, especially those in close proximity to each other (e.g. the Volcanic Hills and Coyote Mountains). These differences were thought to be largely the result different magmatic sources. The potential of finding two differing magma types in close proximity could possibly reflect the opening of a slab window produced by the collision of the spreading center and continued subduction of the Farallon plate beneath the North American continent. However, evidence presented here suggests that crustal contamination and metasomatic processes in the Coyote Mountains are the primary source of the geochemical variations. Trace-element signatures are similar in samples from all of the study regions, with pronounced Nb depletion typical of island-arc volcanism. The distinguishing features of samples from the Coyote Mountains are the high amount of alteration and their high levels of K2O (4-5 wt%). This study will examine the possibility that these characteristics result from the interaction of the basalt with a highly alkaline body of water and/or sediments. Supporting data for such a model include pillow structures and spiracle formations within the basalt flows exposed in the Fossil Canyon and Butaca Canyon regions of the Coyote Mountains. Future studies of the olivine-basalt samples within the central region of the Coyote Mountains, away from the altered exposures, would provide a more complete understanding of their genesis. While the geochemical data were initially analyzed using standard geochemical techniques, the data are also analyzed statistically using a relatively new multivariate analysis technique known as Compositional Data Analysis (CoDA). Using the CoDA techniques, a clearer insight into the actual changes of the chemical composition can be seen. It also provides statistically valid correlation between the various regions in the study area. The CoDA processes, CLR BiPlots in particular, show which elements vary from one region to the next. It also differentiates elemental groups that correlate with typical rock-forming processes (e.g., fractional crystallization) from those that result from contamination from other sources or processes. Two examples illustrate the application: 1) In the Volcanic Hills, a pronounced negative correlation between MgO and K2O is clearly observed. However, in the Table Mountai

Fisch, Gregory Zane

258

Mineral resources and mineral resource potential of the Saline Valley and Lower Saline Wilderness Study Areas, Inyo County, California  

SciTech Connect

This report presents the results of a mineral survey of the Saline Valley Wilderness Study Area and the Lower Saline Wilderness Study Area, California Desert Conservation Area, Inyo County, California. The Saline Valley Wilderness Study Area and the Lower Saline Wilderness Study Area were studied in 1981-83 using geologic, geochemical, remote sensing, and geophysical surveys and the examination of mines and prospects to evaluate mineral resources and the potential for mineral resources. The Saline Valley Wilderness Study Area has a high potential for the occurrence of gold resources in two areas. One area, largely outside the study area, is in the vicinity of the Crater mine in the Last Chance Range, and it has potential for the occurrence of gold in a disseminated deposit in an epithermal environment. The other area is in Marble Canyon in the western part of the study area, and it has high potential for the occurrence of gold placer deposits. Marble Canyon also has a moderate potential for gold in placer deposits downstream from the area of high potential. Seven areas, scattered from the Inyo Mountains to the Last Chance Range, have a low potential for the occurrence of gold in disseminated deposits, and one area that lies astride the border of Death Valley National Monument has a low potential for the occurrence of gold in vein deposits. The southern end of Eureka Valley has a low potential for the occurrence of lithium and uranium resources in buried sedimentary deposits for the occurrence of lithium and uranium resources in buried sedimentary deposits beneath the valley floor. Demonstrated resources of native sulfur exist at the Crater mine but no resource potential was identified nearby in adtacent parts of the study area. 3 figs. (ACR)

Wrucke, C.T.; Marsh, S.P.; Raines, G.L.; Werschky, R.S.; Blakely, R.J.; Hoover, D.B.; McHugh, E.L.; Rumsey, C.M.; Gaps, R.S.; Causey, J.D.

1984-01-01

259

Emergency Assessment of Debris-Flow Hazards from Basins Burned by the 2007 Canyon Fire, Los Angeles County, Southern California  

USGS Publications Warehouse

INTRODUCTION The objective of this report is to present a preliminary emergency assessment of the potential for debris-flow generation from basins burned by the Canyon Fire in Los Angeles County, southern California in 2007. Debris flows are among the most hazardous geologic phenomena; debris flows that followed wildfires in southern California in 2003 killed 16 people and caused tens of millions of dollars of property damage. A short period of even moderate rainfall on a burned watershed can lead to debris flows. Rainfall that is normally absorbed into hillslope soils can run off almost instantly after vegetation has been removed by wildfire. This causes much greater and more rapid runoff than is normal from creeks and drainage areas. Highly erodible soils in a burn scar allow flood waters to entrain large amounts of ash, mud, boulders, and unburned vegetation. Within the burned area and downstream, the force of rushing water, soil, and rock can destroy culverts, bridges, roadways, and buildings, potentially causing injury or death. This emergency debris-flow hazard assessment is presented as relative ranking of the predicted median volume of debris flows that can issue from basin outlets in response to 2.25 inches (57.15 mm) of rainfall over a 3-hour period. Such a storm has a 10-year return period. The calculation of debris flow volume is based on a multiple-regression statistical model that describes the median volume of material that can be expected from a recently burned basin as a function of the area burned at high and moderate severity, the basin area with slopes greater than or equal to 30 percent, and triggering storm rainfall. Cannon and others (2007) describe the methods used to generate the hazard maps. Identification of potential debris-flow hazards from burned drainage basins is necessary to issue warnings for specific basins, to make effective mitigation decisions, and to help plan evacuation timing and routes.

Cannon, Susan H.; Gartner, Joseph E.; Michael, John A.; Bauer, Mark A.; Stitt, Susan C.; Knifong, Donna L.; McNamara, Bernard J.; Roque, Yvonne M.

2007-01-01

260

Emergency Assessment of Debris-Flow Hazards from Basins Burned by the 2007 Harris Fire, San Diego County, Southern California  

USGS Publications Warehouse

INTRODUCTION The objective of this report is to present a preliminary emergency assessment of the potential for debris-flow generation from basins burned by the Harris Fire in San Diego County, southern California in 2007. Debris flows are among the most hazardous geologic phenomena; debris flows that followed wildfires in southern California in 2003 killed 16 people and caused tens of millions of dollars of property damage. A short period of even moderate rainfall on a burned watershed can lead to debris flows. Rainfall that is normally absorbed into hillslope soils can run off almost instantly after vegetation has been removed by wildfire. This causes much greater and more rapid runoff than is normal from creeks and drainage areas. Highly erodible soils in a burn scar allow flood waters to entrain large amounts of ash, mud, boulders, and unburned vegetation. Within the burned area and downstream, the force of rushing water, soil, and rock can destroy culverts, bridges, roadways, and buildings, potentially causing injury or death. This emergency debris-flow hazard assessment is presented as relative ranking of the predicted median volume of debris flows that can issue from basin outlets in response to 1.75 inches (44.45 mm) of rainfall over a 3-hour period. Such a storm has a 10-year return period. The calculation of debris flow volume is based on a multiple-regression statistical model that describes the median volume of material that can be expected from a recently burned basin as a function of the area burned at high and moderate severity, the basin area with slopes greater than or equal to 30 percent, and triggering storm rainfall. Cannon and others (2007) describe the methods used to generate the hazard maps. Identification of potential debris-flow hazards from burned drainage basins is necessary to issue warnings for specific basins, to make effective mitigation decisions, and to help plan evacuation timing and routes.

Cannon, Susan H.; Gartner, Joseph E.; Michael, John A.; Bauer, Mark A.; Stitt, Susan C.; Knifong, Donna L.; McNamara, Bernard J.; Roque, Yvonne M.

2007-01-01

261

Emergency Assessment of Debris-Flow Hazards from Basins Burned by the 2007 Poomacha Fire, San Diego County, Southern California  

USGS Publications Warehouse

INTRODUCTION The objective of this report is to present a preliminary emergency assessment of the potential for debris-flow generation from basins burned by the Poomacha Fire in San Diego County, southern California in 2007. Debris flows are among the most hazardous geologic phenomena; debris flows that followed wildfires in southern California in 2003 killed 16 people and caused tens of millions of dollars of property damage. A short period of even moderate rainfall on a burned watershed can lead to debris flows. Rainfall that is normally absorbed into hillslope soils can run off almost instantly after vegetation has been removed by wildfire. This causes much greater and more rapid runoff than is normal from creeks and drainage areas. Highly erodible soils in a burn scar allow flood waters to entrain large amounts of ash, mud, boulders, and unburned vegetation. Within the burned area and downstream, the force of rushing water, soil, and rock can destroy culverts, bridges, roadways, and buildings, potentially causing injury or death. This emergency debris-flow hazard assessment is presented as relative ranking of the predicted median volume of debris flows that can issue from basin outlets in response to 2.25 inches (57.15 mm) of rainfall over a 3-hour period. Such a storm has a 10-year return period. The calculation of debris flow volume is based on a multiple-regression statistical model that describes the median volume of material that can be expected from a recently burned basin as a function of the area burned at high and moderate severity, the basin area with slopes greater than or equal to 30 percent, and triggering storm rainfall. Cannon and others (2007) describe the methods used to generate the hazard maps. Identification of potential debris-flow hazards from burned drainage basins is necessary to issue warnings for specific basins, to make effective mitigation decisions, and to help plan evacuation timing and routes.

Cannon, Susan H.; Gartner, Joseph E.; Michael, John A.; Bauer, Mark A.; Stitt, Susan C.; Knifong, Donna L.; McNamara, Bernard J.; Roque, Yvonne M.

2007-01-01

262

Emergency Assessment of Debris-Flow Hazards from Basins Burned by the 2007 Rice Fire, San Diego County, Southern California  

USGS Publications Warehouse

INTRODUCTION The objective of this report is to present a preliminary emergency assessment of the potential for debris-flow generation from basins burned by the Rice Fire in San Diego County, southern California in 2007. Debris flows are among the most hazardous geologic phenomena; debris flows that followed wildfires in southern California in 2003 killed 16 people and caused tens of millions of dollars of property damage. A short period of even moderate rainfall on a burned watershed can lead to debris flows. Rainfall that is normally absorbed into hillslope soils can run off almost instantly after vegetation has been removed by wildfire. This causes much greater and more rapid runoff than is normal from creeks and drainage areas. Highly erodible soils in a burn scar allow flood waters to entrain large amounts of ash, mud, boulders, and unburned vegetation. Within the burned area and downstream, the force of rushing water, soil, and rock can destroy culverts, bridges, roadways, and buildings, potentially causing injury or death. This emergency debris-flow hazard assessment is presented as relative ranking of the predicted median volume of debris flows that can issue from basin outlets in response to 1.75 inches (44.45 mm) of rainfall over a 3-hour period. Such a storm has a 10-year return period. The calculation of debris flow volume is based on a multiple-regression statistical model that describes the median volume of material that can be expected from a recently burned basin as a function of the area burned at high and moderate severity, the basin area with slopes greater than or equal to 30 percent, and triggering storm rainfall. Cannon and others (2007) describe the methods used to generate the hazard maps. Identification of potential debris-flow hazards from burned drainage basins is necessary to issue warnings for specific basins, to make effective mitigation decisions, and to help plan evacuation timing and routes.

Cannon, Susan H.; Gartner, Joseph E.; Michael, John A.; Bauer, Mark A.; Stitt, Susan C.; Knifong, Donna L.; McNamara, Bernard J.; Roque, Yvonne M.

2007-01-01

263

Emergency Assessment of Debris-Flow Hazards from Basins Burned by the 2007 Witch Fire, San Diego County, Southern California  

USGS Publications Warehouse

INTRODUCTION The objective of this report is to present a preliminary emergency assessment of the potential for debris-flow generation from basins burned by the Witch Fire in San Diego County, southern California in 2007. Debris flows are among the most hazardous geologic phenomena; debris flows that followed wildfires in southern California in 2003 killed 16 people and caused tens of millions of dollars of property damage. A short period of even moderate rainfall on a burned watershed can lead to debris flows. Rainfall that is normally absorbed into hillslope soils can run off almost instantly after vegetation has been removed by wildfire. This causes much greater and more rapid runoff than is normal from creeks and drainage areas. Highly erodible soils in a burn scar allow flood waters to entrain large amounts of ash, mud, boulders, and unburned vegetation. Within the burned area and downstream, the force of rushing water, soil, and rock can destroy culverts, bridges, roadways, and buildings, potentially causing injury or death. This emergency debris-flow hazard assessment is presented as relative ranking of the predicted median volume of debris flows that can issue from basin outlets in response to 2.25 inches (57.15 mm) of rainfall over a 3-hour period. Such a storm has a 10-year return period. The calculation of debris flow volume is based on a multiple-regression statistical model that describes the median volume of material that can be expected from a recently burned basin as a function of the area burned at high and moderate severity, the basin area with slopes greater than or equal to 30 percent, and triggering storm rainfall. Cannon and others (2007) describe the methods used to generate the hazard maps. Identification of potential debris-flow hazards from burned drainage basins is necessary to issue warnings for specific basins, to make effective mitigation decisions, and to help plan evacuation timing and routes.

Cannon, Susan H.; Gartner, Joseph E.; Michael, John A.; Bauer, Mark A.; Stitt, Susan C.; Knifong, Donna L.; McNamara, Bernard J.; Roque, Yvonne M.

2007-01-01

264

Emergency Assessment of Debris-Flow Hazards from Basins Burned by the 2007 Buckweed Fire, Los Angeles County, Southern California  

USGS Publications Warehouse

INTRODUCTION The objective of this report is to present a preliminary emergency assessment of the potential for debris-flow generation from basins burned by the Buckweed Fire in Los Angeles County, southern California in 2007. Debris flows are among the most hazardous geologic phenomena; debris flows that followed wildfires in southern California in 2003 killed 16 people and caused tens of millions of dollars of property damage. A short period of even moderate rainfall on a burned watershed can lead to debris flows. Rainfall that is normally absorbed into hillslope soils can run off almost instantly after vegetation has been removed by wildfire. This causes much greater and more rapid runoff than is normal from creeks and drainage areas. Highly erodible soils in a burn scar allow flood waters to entrain large amounts of ash, mud, boulders, and unburned vegetation. Within the burned area and downstream, the force of rushing water, soil, and rock can destroy culverts, bridges, roadways, and buildings, potentially causing injury or death. This emergency debris-flow hazard assessment is presented as relative ranking of the predicted median volume of debris flows that can issue from basin outlets in response to 2.25 inches (57.15 mm) of rainfall over a 3-hour period. Such a storm has a 10-year return period. The calculation of debris flow volume is based on a multiple-regression statistical model that describes the median volume of material that can be expected from a recently burned basin as a function of the area burned at high and moderate severity, the basin area with slopes greater than or equal to 30 percent, and triggering storm rainfall. Cannon and others (2007) describe the methods used to generate the hazard maps. Identification of potential debris-flow hazards from burned drainage basins is necessary to issue warnings for specific basins, to make effective mitigation decisions, and to help plan evacuation timing and routes.

Cannon, Susan H.; Gartner, Joseph E.; Michael, John A.; Bauer, Mark A.; Stitt, Susan C.; Knifong, Donna L.; McNamara, Bernard J.; Roque, Yvonne M.

2007-01-01

265

Emergency Assessment of Debris-Flow Hazards from Basins Burned by the 2007 Ammo Fire, San Diego County, Southern California  

USGS Publications Warehouse

INTRODUCTION The objective of this report is to present a preliminary emergency assessment of the potential for debris-flow generation from basins burned by the Ammo Fire in San Diego County, southern California in 2007. Debris flows are among the most hazardous geologic phenomena; debris flows that followed wildfires in southern California in 2003 killed 16 people and caused tens of millions of dollars of property damage. A short period of even moderate rainfall on a burned watershed can lead to debris flows. Rainfall that is normally absorbed into hillslope soils can run off almost instantly after vegetation has been removed by wildfire. This causes much greater and more rapid runoff than is normal from creeks and drainage areas. Highly erodible soils in a burn scar allow flood waters to entrain large amounts of ash, mud, boulders, and unburned vegetation. Within the burned area and downstream, the force of rushing water, soil, and rock can destroy culverts, bridges, roadways, and buildings, potentially causing injury or death. This emergency debris-flow hazard assessment is presented as relative ranking of the predicted median volume of debris flows that can issue from basin outlets in response to 1.75 inches (44.45 mm) of rainfall over a 3-hour period. Such a storm has a 10-year return period. The calculation of debris flow volume is based on a multiple-regression statistical model that describes the median volume of material that can be expected from a recently burned basin as a function of the area burned at high and moderate severity, the basin area with slopes greater than or equal to 30 percent, and triggering storm rainfall. Cannon and others (2007) describe the methods used to generate the hazard maps. Identification of potential debris-flow hazards from burned drainage basins is necessary to issue warnings for specific basins, to make effective mitigation decisions, and to help plan evacuation timing and routes.

Cannon, Susan H.; Gartner, Joseph E.; Michael, John A.; Bauer, Mark A.; Stitt, Susan C.; Knifong, Donna L.; McNamara, Bernard J.; Roque, Yvonne M.

2007-01-01

266

Use of density equalizing map projections (DEMP) in the analysis of childhood cancer in four California counties  

SciTech Connect

In studying geographic disease distributions, one normally compares rates of arbitrarily defined geographic subareas (e.g. census tracts), thereby sacrificing the geographic detail of the original data. The sparser the data, the larger the subareas must be in order to calculate stable rates. This dilemma is avoided with the technique of Density Equalizing Map Projections (DEMP). Boundaries of geographic subregions are adjusted to equalize population density over the entire study area. Case locations plotted on the transformed map should have a uniform distribution if the underlying disease rates are constant. The density equalized map portrays both individual cases and rates, and can be understood by untrained observers. Simple statistical techniques can be used to test the uniformity of the transformed map. This report describes application of the DEMP technique to a sizeable `real-world` data set: 401 childhood cancer cases occurring between 1980 and 1988 in four California counties. In an earlier analysis of the same data, the California Department of Health Services (DHS) calculated rates for 101 communities and found no significant geographic variability. The DDS 1980--88 population estimates are no longer available, so in this analysis 1980 Census data were used; geographic units were 262 census tracts. A k`th nearest neighbor analysis, corrected for boundary effects and for within-tract variability, provides strong evidence for geographic nonuniformity in tract rates ({rho} < l0{sup {minus}4}). No such effect is observed for artificial cases generated under the assumption of constant rates. Pending reanalysis with 1980-88 population estimates, no epidemiologic conclusions can be drawn at this time.

Merrill, D.W. Selvin, S.; Close, E.R.; Holmes, H.H.

1995-04-01

267

Mineral resources of the Tunnison Mountain Wilderness Study Area, Lassen County, California  

SciTech Connect

The part of the Tunnison Mountain Wilderness Study Area requested for mineral surveys encompasses 8,445 acres in northeastern California. The area contains Tertiary pyroclastic rocks, basaltic andesite flows, and basalt flows. There are no identified resources and it is unlikely that metallic minerals or oil and gas are present. Geothermal areas south and southwest of the study area suggest that the area may have potential for geothermal energy resources. Therefore, it has been assigned low potential for such resources; however, the mountainous geologic terrane differs from the sediment-filled valleys where the known resources are located.

Peterson, J.A.; Frisken, J.G.; Plouff, D.; Goeldner, C.A.; Munts, S.R.

1988-01-01

268

Mineral resources of the Tunnison Mountains Wilderness Study Area, Lassen County, California  

SciTech Connect

The part of the Tunnison Mountain Wilderness Study Area requested for mineral surveys encompasses 8,445 acres in northeastern California. The area contains Tertiary pyroclastic rocks, basaltic andesite flows, and basalt flows. There are no identified resources and it is unlikely that metallic minerals or oil and gas are present. Geothermal areas south and southwest of the study area suggest that the area may have potential for geothermal energy sources. Therefore, it has been assigned low potential for such resources; however, the mountainous geologic terrane differs from the sediment-filled valleys where the known resources are located.

Peterson, J.A.; Friskin, J.G.; Plouff, D.; Goeldner, C.A. (Geological Survey, Reston, VA (USA)); Munts, S.R. (US Bureau of Mines (US))

1988-01-01

269

Geology, hydrology, and water supply of Edwards Air Force Base, Kern County, California  

USGS Publications Warehouse

Edwards Air Force Base occupies the northern part of Antelope Valley, California. As a result of large-scale and increasing agricultural pumping in the valley, the net draft has exceeded the perennial supply since about 1930 and was about 170,000 acre-feet in 1951--at least three times the estimated yield. As a result, there has been a continuing depletion of ground water stored in all the unconsolidated deposits, including the principal aquifers contained in the younger and older alluvium.

Dutcher, Lee Carlton; Warts, G.F., Jr.

1963-01-01

270

Potential for Induced Seismicity Related to the Northern California CO2 Reduction Project Pilot Test, Solano County, California  

SciTech Connect

The objective of this technical report is to analyze the potential for induced seismicity due to a proposed small-scale CO{sub 2} injection project in the Montezuma Hills. We reviewed currently available public information, including 32 years of recorded seismic events, locations of mapped faults, and estimates of the stress state of the region. We also reviewed proprietary geological information acquired by Shell, including seismic reflection imaging in the area, and found that the data and interpretations used by Shell are appropriate and satisfactory for the purpose of this report. The closest known fault to the proposed injection site is the Kirby Hills Fault. It appears to be active, and microearthquakes as large as magnitude 3.7 have been associated with the fault near the site over the past 32 years. Most of these small events occurred 9-17 miles (15-28 km) below the surface, which is deep for this part of California. However, the geographic locations of the many events in the standard seismicity catalog for the area are subject to considerable uncertainty because of the lack of nearby seismic stations; so attributing the recorded earthquakes to motion along any specific fault is also uncertain. Nonetheless, the Kirby Hills Fault is the closest to the proposed injection site and is therefore our primary consideration for evaluating the potential seismic impacts, if any, from injection. Our planned installation of seismic monitoring stations near the site will greatly improve earthquake location accuracy. Shell seismic data also indicate two unnamed faults more than 3 miles east of the project site. These faults do not reach the surface as they are truncated by an unconformity at a depth of about 2,000 feet (610 m). The unconformity is identified as occurring during the Oligocene Epoch, 33.9-23.03 million years ago, which indicates that these faults are not currently active. Farther east are the Rio Vista Fault and Midland Fault at distances of about 6 miles (10 km) and 10 miles (16 km), respectively. These faults have been identified as active during the Quaternary (last 1.6 million years), but without evidence of displacement during the Holocene (the last 11,700 years). The stress state (both magnitude and direction) in the region is an important parameter in assessing earthquake potential. Although the available information regarding the stress state is limited in the area surrounding the injection well, the azimuth of the mean maximum horizontal stress is estimated at 41{sup o} and it is consistent with strike-slip faulting on the Kirby Hills Fault, unnamed fault segments to the south, and the Rio Vista Fault. However, there are large variations (uncertainty) in stress estimates, leading to low confidence in these conclusions regarding which fault segments are optimally oriented for potential slip induced by pressure changes. Uncertainty in the stress state can be substantially reduced by measurements planned when wells are drilled at the site. Injection of CO{sub 2} at about two miles depth will result in a reservoir fluid pressure increase, which is greatest at the well and decreases with distance from the well. After the injection stops, reservoir fluid pressures will decrease rapidly. Pressure changes have been predicted quantitatively by numerical simulation models of the injection. Based on these models, the pressure increase on the Kirby Hills Fault at its closest approach to the well due to the injection of 6,000 metric tons of CO{sub 2} would be a few pounds per square inch (psi), which is a tiny fraction of the natural pressure of approximately 5,000 psi at that depth. The likelihood of such a small pressure increase triggering a slip event is very small. It is even more unlikely that events would be induced at the significantly greater depths where most of the recorded earthquakes are concentrated, because it is unlikely that such a small pressure pulse would propagate downwards any appreciable distance. Therefore, in response to the specific question of the likelihood of the CO{sub 2} injection caus

Myer, L.; Chiaramonte, L.; Daley, T.M.; Wilson, D.; Foxall, W.; Beyer, J.H.

2010-06-15

271

Geology and ground water in north-central Santa Cruz County, California  

USGS Publications Warehouse

North-central Santa Cruz County is underlain mainly by folded sedimentary rocks of Tertiary and Cretaceous age that have been highly fractured by movements in the San Andreas fault system. Ground water is stored in fractures within shale and mudstone formations and in intergranular pore spaces within fine- to very fine-grained sandstone and siltstone formations. Fewer than 10% of the wells yield more than 15 gallons of water per minute. The water in most wells is moderately hard to very hard, is generally of a sodium bicarbonate or calcium bicarbonate type, and commonly has excessive concentrations of iron or manganese. Of the many geologic units in the study area, only the Purisima Formation of Pliocene age has the potential to sustain well yields greater than 100 gallons per minute. (USGS)

Johnson, Michael J.

1980-01-01

272

Birth of a fault: Connecting the Kern County and Walker Pass, California, earthquakes  

USGS Publications Warehouse

A band of seismicity transects the southern Sierra Nevada range between the northeastern end of the site of the 1952 MW (moment magnitude) 7.3 Kern County earthquake and the site of the 1946 MW 6.1 Walker Pass earthquake. Relocated earthquakes in this band, which lacks a surface expression, better delineate the northeast-trending seismic lineament and resolve complex structure near the Walker Pass mainshock. Left-lateral earthquake focal planes are rotated counterclockwise from the strike of the seismic lineament, consistent with slip on shear fractures such as those observed in the early stages of fault development in laboratory experiments. We interpret this seismic lineament as a previously unrecognized, incipient, currently blind, strike-slip fault, a unique example of a newly forming structure.

Bawden, G.W.; Michael, A.J.; Kellogg, L.H.

1999-01-01

273

Proposed Construction of the Madera County Educational Center in the State Center Community College District. A Report to the Governor and Legislature in Response to a Request from the Board of Governors of the California Community Colleges.  

ERIC Educational Resources Information Center

In this report, the California Postsecondary Education Commission responds to a request by the Chancellor of the California Community Colleges to review the need for and location of a new educational center, the Madera County Educational Center, north of Fresno within the State Center Community College District. The report contains nine…

California State Postsecondary Education Commission, Sacramento.

274

Cascadia Earthquake and Tsunami Scenario for California's North Coast  

NASA Astrophysics Data System (ADS)

In 1995 the California Division of Mines and Geology (now the California Geological Survey) released a planning scenario for an earthquake on the southern portion of the Cascadia subduction zone (CSZ). This scenario was the 8th and last of the Earthquake Planning Scenarios published by CDMG. It was the largest magnitude CDMG scenario, an 8.4 earthquake rupturing the southern 200 km of the CSZ, and it was the only scenario to include tsunami impacts. This scenario event has not occurred in historic times and depicts impacts far more severe than any recent earthquake. The local tsunami hazard is new; there is no written record of significant local tsunami impact in the region. The north coast scenario received considerable attention in Humboldt and Del Norte Counties and contributed to a number of mitigation efforts. The Redwood Coast Tsunami Work Group (RCTWG), an organization of scientists, emergency managers, government agencies, and businesses from Humboldt, Mendocino, and Del Norte Counties, was formed in 1996 to assist local jurisdictions in understanding the implications of the scenario and to promote a coordinated, consistent mitigation program. The group has produced print and video materials and promoted response and evacuation planning. Since 1997 the RCTWG has sponsored an Earthquake Tsunami Education Room at county fairs featuring preparedness information, hands-on exhibits and regional tsunami hazard maps. Since the development of the TsunamiReady Program in 2001, the RCTWG facilitates community TsunamiReady certification. To assess the effectiveness of mitigation efforts, five telephone surveys between 1993 and 2001 were conducted by the Humboldt Earthquake Education Center. A sixth survey is planned for this fall. Each survey includes between 400 and 600 respondents. Over the nine year period covered by the surveys, the percent with houses secured to foundations has increased from 58 to 80 percent, respondents aware of a local tsunami hazard increased from 51 to 73 percent and knowing what the Cascadia subduction zone is from 16 to 42 percent. It is not surprising that the earlier surveys showed increases as several strong earthquakes occurred in the area between 1992 and 1995 and there was considerable media attention. But the 2001 survey, seven years after the last widely felt event, still shows significant increases in almost all preparedness indicators. The 1995 CDMG scenario was not the sole reason for the increased interest in earthquake and tsunami hazards in the area, but the scenario gave government recognition to an event that was previously only considered seriously in the scientific community and has acted as a catalyst for mitigation and planning efforts.

Dengler, L.

2006-12-01

275

Spatial and Temporal Variability of Hydraulic Properties in the Russian River Streambed, Central Sonoma County, California  

NASA Astrophysics Data System (ADS)

The reach of the Russian River flowing through Sonoma County, CA, is important to fisheries and recreations, as well as being essential to the water resources infrastructure of the county. An improved understanding of the manner in which streambed sediments impact rates of ground-water recharge is essential in optimizing withdrawals without increasing potential impacts on fishery habitats and recreational needs. Temporal and spatial variations of flux and vertical hydraulic conductivity (Kv) were measured in the streambed along the Russian River at multiple locations. In-situ flux and Kv measurements were made using a modified seepage meter equipped with piezometers during monitoring events performed in June 2003, September 2003, and March 2004. Additionally, bulk sediment samples were collected during the monitoring events to characterize the grain size distribution of the streambed. Three different streambed locations (near-bank, midpoint, and thalweg) were monitored and sampled at five different sample locales in a 20-km reach of the Russian River. Vertical hydraulic conductivity of the streambed ranged from 8.55x10-5 cm/sec to 1.52x10-1 cm/sec. Significantly (p<0.05) higher values of Kv were found near the banks of the Russian River, and Kv increased (30% to an order of magnitude) after the winter storm season of 2004. Flux varied from -240 to 600 cm/day, which indicates both gaining and losing reaches of the stream occur in our study area. These findings will assist in developing a MODFLOW ground-water flow simulation that incorporates the variable streambed conductance values determined along this reach of the Russian River.

Gorman, P. D.; Constantz, J.; Laforce, M. J.

2007-12-01

276

Public health assessment for Sola Optical USA, Inc. , Petaluma, Sonoma County, California, region 9. CERCLIS No. CAD981171523. Final report  

SciTech Connect

The Public Health Assessment of Sola Optical USA, Inc. is based on a review of the Remedial Investigation report and the Public Health Risk Assessment. The Sola Optical USA, Inc. (Sola) site, located in Petaluma, Sonoma County, California, was placed on the National Priorities List by the EPA on June, 1988. The EPA is the lead governmental agency for the cleanup at the Sola site. Spillage associated with six underground solvent storage tanks resulted in volatile organic contaminants (VOCs) leaking into the subsurface soils and groundwater. These underground tanks and some of the surrounding contaminated soil have been excavated and removed from the site. Various VOCs have been detected in on-site groundwater at levels of human health concern; however the contaminated groundwater is not currently a source of drinking water. An on-site groundwater extraction and treatment system has been in operation since 1987. Based on information reviewed, ATSDR and CDHS have concluded that the Sola site poses no apparent public health hazard.

Not Available

1993-01-06

277

Movements and home range of San Joaquin kit foxes on the Naval Petroleum Reserves, Kern County, California  

SciTech Connect

Movements and home range use of San Joaquin kit foxes (Vulpes macrotis mutica) were studied on and adjacent to the Naval Petroleum Reserves (NPR-1 and NPR-2), Kern County, California, between June 1984 and September 1985. Foxes were studied in an undeveloped area of Buena Vista Valley centered on the border between the Reserves, and in an area of intensive petroleum development in NPR-2 adjacent to the city of Taft. Distances moved nightly did not differ between sexes or between level of petroleum development. Nightly movements averaged 9.4 miles in length during the breeding season, and were significantly longer than the average nightly movements for the pup-rearing (6.4 miles) and pup-dispersal (6.5 miles) seasons. Convex polygon home ranges averaged 1144 acres in size and did not differ between sexes or level of petroleum development. Home ranges of paired males and females overlapped an average of 78%. Home ranges of nonpaired males and females, adjacent males, and adjacent females overlapped an average of 31 to 48%. Although kit foxes were not strongly territorial, home range overlap of paired males and females was significantly greater than that of either nonpaired males and females and males with adjacent home ranges. Home range overlap did not differ between foxes inhabiting developed and undeveloped areas. 42 refs., 10 figs., 9 tabs.

Zoellick, B.W.; O'Farrell, T.P.; Kato, T.T.

1987-09-01

278

Application of advanced geophysical logging methods in the characterization of a fractured-sedimentary bedrock aquifer, Ventura County, California  

USGS Publications Warehouse

An integrated suite of advanced geophysical logging methods was used to characterize the geology and hydrology of three boreholes completed in fractured-sedimentary bedrock in Ventura County, California. The geophysical methods included caliper, gamma, electromagnetic induction, borehole deviation, optical and acoustic televiewer, borehole radar, fluid resistivity, temperature, and electromagnetic flowmeter. The geophysical logging 1) provided insights useful for the overall geohydrologic characterization of the bedrock and 2) enhanced the value of information collected by other methods from the boreholes including core-sample analysis, multiple-level monitoring, and packer testing. The logged boreholes, which have open intervals of 100 to 200 feet, penetrate a sequence of interbedded sandstone and mudstone with bedding striking 220 to 250 degrees and dipping 15 to 40 degrees to the northwest. Fractures intersected by the boreholes include fractures parallel to bedding and fractures with variable strike that dip moderately to steeply. Two to three flow zones were detected in each borehole. The flow zones consist of bedding-parallel or steeply dipping fractures or a combination of bedding-parallel fractures and moderately to steeply dipping fractures. About 75 to more than 90 percent of the measured flow under pumped conditions was produced by only one of the flow zones in each borehole.

Williams, John H.; Lane, John W.; Singha, Kamini; Haeni, F. Peter

2002-01-01

279

Case study of the Wendel-Amedee Exploration Drilling Project, Lassen County, California, User Coupled Confirmation Drilling Program  

SciTech Connect

The Wendel-Amedee KGRA is located in Honey Lake basin in Lassen County, California, on the boundary between the Modoc Plateau and the Basin and Range geologic provinces. A variety of geophysical surveys was performed over the project property. Geophysical data helped in establishing the regional structural framework, however, none of the geophysical data is sufficiently refined to be considered suitable for the purpose of siting an exploration drill hole. Drilling of reservoir confirmation well WEN-1 took place from August 1 to September 22, 1981. Pulse and long-term flow testing subjected the reservoir to a maximum flow of 680 gpm for 75 hours. At that rate, the well exhibited a productivity index of 21.6 gpm/psi; the reservoir transmissivity was 3.5 x 10/sup 6/ md-ft/cp. The maximum bottom-hole temperature recorded during testing was 251/sup 0/F. The conceptual model of the geothermal resource at Wendel Hot Springs calls on ground water, originating in the neighboring volcanic highlands, descending through jointed and otherwise permeable rocks into the granitic basement. Once in the basement, the fluid is heated as it continues its descent, and lateral movement as dictated by the hydrologic gradient. It then rises to the discharge point along transmissive faults. 45 refs., 28 figs., 3 tabs.

Zeisloft, J.; Sibbett, B.S.; Adams, M.C.

1984-09-01

280

The effect of selenium on reproduction of black-tailed deer (Odocoileus hemionus columbianus) in Shasta County California  

SciTech Connect

This study was to determine if nutritional inadequacy of selenium may be responsible for a declining reproductive rate of a migratory herd of black-tailed deer. Selenium is an essential trace mineral for mammalian herbivores. Deficiency affects primarily neonates resulting in increased mortality rates. Shasta County, California is indigenously low in selenium due to soil characteristics. Local livestock enterprises have experienced reproductive problems, which were responsive to selenium treatment. The low recruitment rate in the deer herd suggested a physiological link between low selenium status and reproductive problems, and an experimental trial was initiated. Free ranging adult females were supplemented with selenium rumen pellets and marked with radio transmitters. From 1985 to 1987, the selenium dose was doubled as compared to 1984. It was established that evaluation of selenium status by determining whole blood selenium levels adequately describes the major bioactive form of selenium, glutathione peroxidase. To evaluate the experimental trial, the pre-weaning survival rate of progeny of supplemented females was compared with the rate in the untreated herd.

Flueck, W.T.

1989-01-01

281

Concentrations of mercury and other metals in black bass (Micropterus spp.) from Whiskeytown Lake, Shasta County, California, 2005  

USGS Publications Warehouse

This report presents the results of a reconnaissance study conducted by the U.S. Geological Survey (USGS) to determine mercury (Hg) and other selected metal concentrations in Black bass (Micropterus spp.) from Whiskeytown Lake, Shasta County, California. Total mercury concentrations were determined by cold-vapor atomic absorption spectroscopy (CVAAS) in fillets and whole bodies of each sampled fish. Selected metals scans were performed on whole bodies (less the fillets) by inductively coupled plasma–mass spectroscopy (ICP-MS) and inductively coupled plasma–optical emission spectroscopy (ICP-OES). Mercury concentrations in fillet samples ranged from 0.06 to 0.52 micrograms per gram (?g/g) wet weight (ww). Total mercury (HgT) in the same fish whole-body samples ranged from 0.04 to 0.37 (?g/g, ww). Mercury concentrations in 17 percent of "legal catch size" (?305 millimeters in length) were above the U.S. Environmental Protection Agency water-quality criterion for the protection of human health of 0.30 ?g/g (ww). These data will serve as a baseline for future monitoring efforts within Whiskeytown Lake.

May, Jason T.; Hothem, Roger L.; Bauer, Marissa L.; Brown, Larry R.

2012-01-01

282

Review of samples of sediment, tailings, and waters adjacent to the Cactus Queen gold mine, Kern County, California  

USGS Publications Warehouse

The Cactus Queen Mine is located in the western Mojave Desert in Kern County, California. The Cactus Queen gold-silver (Au-Ag) deposit is similar to other Au-Ag deposits hosted in Miocene volcanic rocks that consist of silicic domes and associated flows, pyroclastic rocks, and subvolcanic intrusions. The volcanic rocks were emplaced onto a basement of Mesozoic silicic intrusive rocks. A part of the Cactus Queen Mine is located on Federal land managed by the U.S. Bureau of Land Management (BLM). Staff from the BLM initially sampled the mine area and documented elevated concentrations of arsenic (As) in tailings and sediment. BLM then requested that the U.S. Geological Survey (USGS), in collaboration with Chapman University, measure and characterize As and other geochemical constituents in sediment, tailings, and waters on the part of the mine on Federal lands. This report is made in response to the request by the BLM, the lead agency mandated to conduct a Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) - Removal Site Investigation (RSI). The RSI applies to the potential removal of As-contaminated mine waste from the Cactus Queen Mine as a means of reducing As release and exposure to humans and biota. This report summarizes data obtained from field sampling of sediments, mine tailings, and surface waters at the Cactus Queen Mine on January 27, 2008. Our results provide a preliminary assessment of the sources of As and associated chemical constituents that could potentially impact humans and biota.

Rytuba, James J.; Kim, Christopher S.; Goldstein, Daniel N.

2011-01-01

283

Ox Mountain sanitary landfill: Apanolio Canyon expansion site, San Mateo County, California. Volume 2. Appendix. Final report  

SciTech Connect

Further studies include: plants Observed in Apanolio Canyon; Animals Expected or Observed in Apanolio Canyon; Marbled Murrelet Survey; Review of Available Scientific Information on Six Candidate Insects; Update on Status of Candidate Insects; Apanolio Canyon Sensitive Plant Investigation; Fisheries Resources of Upper Apanolio, Benthic Invertebrate Survey of Apanolio, Corinda Los Trancos, and Pilarcitos Creeks, San Mateo County, California; Streamflows and Velocity of Flows at the Bongard diversion Dam in Apanolio Canyon; A Spring Survey to Determine the Presence or Absence of the San Francisco Garter Snake (Thamnophis sirtalis tetrataenis) in Two Tributaries of Pilarcitos Creek, Half Moon Bay, CA; Wildlife and Fisheries Mitigation Plan, Ox Mountain Sanitary Landfill, Apanolio Canyon Expansion Site; Correspondence Site Selection Criteria Information; Draft Contingency Remedial Action Plan; Leachate Collection and Removal System (LCRS) and Leachate/Contaminated Groundwater Treatment Systems; Apanolio Creek Streamflow Augmentation Plan; Apanolio Canyon Lower Aquifer Recharge Plan; Application for Exemptions - Technical Informations; Geotechnical Study and Specifications, Subgrade Barrier and Clay Liner System; Apanolio Canyon Boring Logs; Potentiometric Surface Maps, Apanolio Canyon; Geologic Cross Sections - Apanolio Canyon; Interim Report on Leachate Exposure Test Program, Apanolio Canyon Landfill Expansion.

Not Available

1989-04-01

284

Patterns of vitamin C intake from food and supplements: survey of an adult population in Alameda County, California.  

PubMed Central

Use of vitamin C in food and pills and its association with health habits and health status were investigated in a random sample of 3,119 adults in Alameda County, California. Vitamin C intakes of nearly 80 per cent of respondents met or exceeded Recommended Daily Dietary Allowances. Fourteen per cent or fewer appeared to have inadequate vitamin C intake. Vitamin C supplements were taken daily by 29 per cent, occasionally by 21 per cent. Most respondents obtained 100 mg or less of vitamin C daily; 2 per cent had more than 2000 mg. Proportionately, more women than men took vitamin C pills daily. Men aged 16 to 44 were the most likely to have neither vitamin C foods nor pills. Persons 45 years and older tended to take vitamin C pills daily, younger persons to take them occasionally. Respondents who did not eat breakfast or who smoked cigarettes had lower vitamin C intakes. People in poor health took more vitamin C than those in good health. Health status may have influenced vitamin C intake rather than vitamin C intake influencing health status. PMID:6859362

Shapiro, L R; Samuels, S; Breslow, L; Camacho, T

1983-01-01

285

Use of Density Equalizing Map Projections (DEMP) in the analysis of childhood cancer in four California counties. Revision 2  

SciTech Connect

In studying geographic disease distributions, one normally compares rates among arbitrarily defined geographic subareas (e.g. census tracts), thereby sacrificing the geographic detail of the original data. The sparser the data, the larger the subareas must be in order to calculate stable rates. This dilemma is avoided with the technique of Density Equalizing Map Projections (DEMP). Boundaries of geographic subregions are adjusted to equalize population density over the entire study area. Case locations plotted on the transformed map should have a uniform distribution if the underlying disease rates are constant. The present report describes the application of the DEMP technique to 401 childhood cancer cases occurring between 1980 and 1988 in four California counties, with the use of map files and population data for the 262 tracts of the 1980 Census. A k`th nearest neighbor analysis provides strong evidence for geographic non-uniformity in tract rates (p < 10{sup {minus}4}). No such effect is observed for artificial cases generated under the assumption of constant rates. Work is in progress to repeat the analysis with improved population estimates derived from both 1980 and 1990 Census data. Final epidemiologic conclusions will be reported when that analysis is complete.

Merrill, D.W.; Close, E.R.; Holmes, H.H. [Lawrence Berkeley Lab., CA (United States); Selvin, S. [Lawrence Berkeley Lab., CA (United States)]|[Univ. of California, Berkeley, CA (United States). School of Public Health

1995-10-01

286

RIVER OTTER MONITORING BY CITIZEN SCIENCE VOLUNTEERS IN NORTHERN CALIFORNIA: SOCIAL GROUPS AND LITTER SIZE  

E-print Network

RIVER OTTER MONITORING BY CITIZEN SCIENCE VOLUNTEERS IN NORTHERN CALIFORNIA: SOCIAL GROUPS AND LITTER SIZE JEFFREY M BLACK Department of Wildlife, Humboldt State University, Arcata, CA, 95521 otters@humboldt.edu ABSTRACT--Opportunistic observations of Nearctic River Otter (Lontra canadensis) were collected

Black, Jeff

287

Water-resources data, 1970-75, for Perris Valley and vicinity, Riverside County, California  

USGS Publications Warehouse

In 1969 the U.S. Geological Survey began in Perris Valley, Calif., to determine changes in the hydrologic regime as a rural area becomes urbanized. The investigations spanned several years when precipitation was below normal in most of southern California. Surface-water records were collected for a 6-year period at 21 sites, and continuous precipitation records were obtained at four sites. Ground-water levels were tabulated from historical data at selected wells for 1941, 1968, and 1970. Water quality was monitored at several wells in the valley, and sediment data were collected at three surface-water gages. There was little increase in urbanization during the investigation. (Kosco-USGS)

Lang, David J.

1979-01-01

288

Geochemistry of Birch Creek, Inyo County, California a travertine depositing creek in an arid climate  

USGS Publications Warehouse

A small stream in eastern California was studied in detail to determine the causes of travertine deposition from the stream. Although the ground water feeding the stream is slightly supersaturated to just saturated with calcite, the ground water is supersaturated with CO2 with respect to the overlying air. The water becomes increasingly supersaturated with calcite in a downstream direction as CO2 loss to the air and by photosynthesis exceeds the rate of precipitation of calcite. Water loss by evaporation was below detection and does not play an important role in calcite deposition in this case. The water loss is by seepage through the stream bed. Observations showed variations in HCO-3, pH, discharge, Ca+2, relative humidity, water and air temperatures, and dissolved CO2. Comparisons of observed and equilibrium states are given for five sampling stations along the stream. ?? 1965.

Barnes, I.

1965-01-01

289

Mathematical model of the West Bolsa Ground-water Basin, San Benito County, California  

USGS Publications Warehouse

Simulation of the West Bolsa ground-water basin hydrology in California had provided values of basin recharge and discharge and nodally distributed values of transmissivity and storage coefficient. Average net recharge from April 1945 to March 1969 was 6.2 cubic feet per second and occurred as subsurace recharge and infiltration of rain and minor streamflow. Discharge from the basin during the same period was 8.1 cubic feet per second and occurred as pumping and leakage from confined parts of the basin. Values of transmissivity used in the model generally range from 3,300 to 20,000 feet squared per day. Values of storage coefficient used in the model range from 0.0005 to 0.10. (Woodard-USGS)

Faye, Robert E.

1976-01-01

290

Tick-borne Relapsing Fever and Borrelia hermsii, Los Angeles County, California, USA  

PubMed Central

The primary cause of tick-borne relapsing fever in western North America is Borrelia hermsii, a rodent-associated spirochete transmitted by the fast-feeding soft tick Ornithodoros hermsi. We describe a patient who had an illness consistent with relapsing fever after exposure in the mountains near Los Angeles, California, USA. The patient’s convalescent-phase serum was seropositive for B. hermsii but negative for several other vector-borne bacterial pathogens. Investigations at the exposure site showed the presence of O. hermsi ticks infected with B. hermsii and the presence of rodents that were seropositive for the spirochete. We determined that this tick-borne disease is endemic to the San Gabriel Mountains near the greater Los Angeles metropolitan area. PMID:19624916

Raffel, Sandra J.; Schrumpf, Merry E.; Webster, Larry S.; Marques, Adriana R.; Spano, Robyn; Rood, Michael; Burns, Joe; Hu, Renjie

2009-01-01

291

Drilling, logging and preliminary well testing of geothermal well Susan 1, Susanville, Lassen County, California  

SciTech Connect

Susan 1, a hot water production well, was drilled late in 1980 for the City of Susanville, California, as part of its geothermal space-heating project. A history of drilling, logging, completion and pump testing of this well is presented. Susan 1 was drilled to 930 feet using local river water with a 17-1/2-inch bit from 50 to 540 feet and a 12-1/2-inch bit from 540 to 927 feet. A 12-3/4-inch solid casing was set from surface to 350 feet, a slotted casing from 350 to 538 feet, and a 8-5/8-inch slotted casing from 520 to 925 feet. Interpretations of the following logs and test data from this well are presented: drilling logs (penetration rate, water loss and gain, return temperatures); formation logs (description of well cuttings, caliper, spontaneous potential, electrical resistivity, gamma ray, neutron); production logs (temperature, spinner); and pump test data.

McNitt, J.R.; Petersen, C.A.; Sanyal, S.K.

1981-03-01

292

Intensive early season adulticide applications decrease arbovirus transmission throughout the Coachella Valley, Riverside County, California.  

PubMed

In the Coachella Valley of California the seasonal onset of St. Louis encephalitis virus (SLEV), western equine encephalomyelitis virus (WEEV), and West Nile virus (WNV) has been detected consistently at the shoreline of the Salton Sea near the community of North Shore. The timing and intensity of initial amplification in the Culex tarsalis Coquillett/wild bird cycle at this focus seemed closely linked to the subsequent dispersal of virus to the rest of the Coachella Valley and perhaps southern California. In 2004, an attempt was made to interrupt the amplification and dispersal of WNV using ground ultra-low volume (ULV) applications of Pyrenone 25-5. Although these localized treatments were started 1 month after the initial detection in April, surveillance indicated no dispersal from this focus at this time. However, these treatments appeared to have little effect, and WNV eventually was detected throughout the valley, with seven human cases reported in the urbanized upper valley near Palm Springs. In 2005, the initial detection of WNV at North Shore at the end of May was followed rapidly by dispersal throughout the valley precluding efforts at containment. Evaluation of ground and aerial applications at North Shore during May and June 2005, respectively, indicated variable kill of sentinel mosquitoes (overall mortality: ground, 43%; air, 34%) and limited control of the target Cx. tarsalis population. In 2006, aerial ULV applications with the same chemical were begun immediately following the first detection of virus in mid-April, resulting in an apparent reduction of Cx. tarsalis abundance and delay of WNV activity in the rural lower valley and a marked decline in transmission by Culex quinquefasciatus Say populations in the densely populated upper northwestern valley with no human cases reported. PMID:18494603

Lothrop, Hugh D; Lothrop, Branka B; Gomsi, Donald E; Reisen, William K

2008-08-01

293

Preliminary geologic map of the Black Mountain area northeast of Victorville, San Bernardino County, California  

USGS Publications Warehouse

The Black Mountain area is in the Mojave Desert about 20 km northeast of Victorville, California. The geology of this area is of interest primarily for its excellent exposures of the early Mesozoic Fairview Valley Formation, a sequence of weakly metamorphosed sedimentary rocks including a thick, commercially important unit of limestone conglomerate that has been mined for cement at Black Mountain Quarry for several decades. Recent geochronologic work has shown that the Fairview Valley Formation is probably of Early Jurassic age. This preliminary geologic map of the Black Mountain area depicts the stratigraphic and structural relations of the Fairview Valley Formation and the associated rocks, most notably the overlying Sidewinder Volcanics of Early(?), Middle, and Late(?) Jurassic age. The map is based on new field studies by the author designed to clarify details of the stratigraphy and structure unresolved by previous investigations. The map is considered preliminary because the ages of some geologic units critical for a satisfactory understanding of the stratigraphic and structural framework remain unknown. The map area also includes a segment of the Helendale Fault, one of several faults of known or inferred late Cenozoic right-lateral displacement that make up the Eastern California Shear Zone. The fault is marked by aligned northeast-facing scarps in Pleistocene or older alluvial deposits and the underlying bedrock units. Relations in the map area suggest that right-lateral displacement on the Helendale Fault probably does not exceed 2 km, a conclusion compatible with previous estimates of displacement on this fault based on relations both within and outside the Black Mountain area.

Stone, Paul

2006-01-01

294

Intensive Early Season Adulticide Applications Decrease Arbovirus Transmission Throughout the Coachella Valley, Riverside County, California  

PubMed Central

Abstract In the Coachella Valley of California the seasonal onset of St. Louis encephalitis virus (SLEV), western equine encephalomyelitis virus (WEEV), and West Nile virus (WNV) has been detected consistently at the shoreline of the Salton Sea near the community of North Shore. The timing and intensity of initial amplification in the Culex tarsalis Coquillett/wild bird cycle at this focus seemed closely linked to the subsequent dispersal of virus to the rest of the Coachella Valley and perhaps southern California. In 2004, an attempt was made to interrupt the amplification and dispersal of WNV using ground ultra-low volume (ULV) applications of Pyrenone 25-5®. Although these localized treatments were started 1 month after the initial detection in April, surveillance indicated no dispersal from this focus at this time. However, these treatments appeared to have little effect, and WNV eventually was detected throughout the valley, with seven human cases reported in the urbanized upper valley near Palm Springs. In 2005, the initial detection of WNV at North Shore at the end of May was followed rapidly by dispersal throughout the valley precluding efforts at containment. Evaluation of ground and aerial applications at North Shore during May and June 2005, respectively, indicated variable kill of sentinel mosquitoes (overall mortality: ground, 43%; air, 34%) and limited control of the target Cx. tarsalis population. In 2006, aerial ULV applications with the same chemical were begun immediately following the first detection of virus in mid-April, resulting in an apparent reduction of Cx. tarsalis abundance and delay of WNV activity in the rural lower valley and a marked decline in transmission by Culex quinquefasciatus Say populations in the densely populated upper northwestern valley with no human cases reported. PMID:18494603

Lothrop, Hugh D.; Lothrop, Branka B.; Gomsi, Donald E.

2008-01-01

295

Faulting apparently related to the 1994 Northridge, California, earthquake and possible co-seismic origin of surface cracks in Potrero Canyon, Los Angeles County, California  

USGS Publications Warehouse

Apparent southward-dipping, reverse-fault zones are imaged to depths of about 1.5 km beneath Potrero Canyon, Los Angeles County, California. Based on their orientation and projection to the surface, we suggest that the imaged fault zones are extensions of the Oak Ridge fault. Geologic mapping by others and correlations with seismicity studies suggest that the Oak Ridge fault is the causative fault of the 17 January 1994 Northridge earthquake (Northridge fault). Our seismically imaged faults may be among several faults that collectively comprise the Northridge thrust fault system. Unusually strong shaking in Potrero Canyon during the Northridge earthquake may have resulted from focusing of seismic energy or co-seismic movement along existing, related shallow-depth faults. The strong shaking produced ground-surface cracks and sand blows distributed along the length of the canyon. Seismic reflection and refraction images show that shallow-depth faults may underlie some of the observed surface cracks. The relationship between observed surface cracks and imaged faults indicates that some of the surface cracks may have developed from nontectonic alluvial movement, but others may be fault related. Immediately beneath the surface cracks, P-wave velocities are unusually low (<400 m/sec), and there are velocity anomalies consistent with a seismic reflection image of shallow faulting to depths of at least 100 m. On the basis of velocity data, we suggest that unconsolidated soils (<800 m/sec) extend to depths of about 15 to 20 m beneath our datum (<25 m below ground surface). The underlying rocks range in velocity from about 1000 to 5000 m/sec in the upper 100 m. This study illustrates the utility of high-resolution seismic imaging in assessing local and regional seismic hazards.

Catchings, R.D.; Goldman, M.R.; Lee, W.H.K.; Rymer, M.J.; Ponti, D.J.

1998-01-01

296

A water-quality monitoring network for Vallecitos Valley, Alameda County, California  

USGS Publications Warehouse

A water-quality monitoring network is proposed to detect the presence of and trace the movement of radioisotopes in the hydrologic system in the vicinity of the Vallecitos Nuclear Center, Alameda County, Calif. The source of the radioisotopes is treated industrial wastewater from the Vallecitos Nuclear Center that is discharged into an unnamed tributary of Vallecitos Creek. The effluent infiltrates the alluvium along the stream course, percolates downward to the water table, and mixes with the native ground water in the subsurface. The average daily discharge of effluent to the hydrologic system in 1978 was about 100,000 gallons. In Vallecitos Valley, the Livermore Gravel and the overlying alluvium constitute the groundwater reservoir. There is no subsurface inflow from adjacent groundwater basins. Groundwater flow in the Vallecitos subbasin is toward the southwest. The proposed network consists of four surface-water sampling sites and six wells to sample the groundwater system. Samples collected monthly at each site and analyzed for tritium and for alpha, beta, and gamma radiation would provide adequate data for monitoring. (USGS)

Farrar, C.D.

1980-01-01

297

Nature and chlorine reactivity of organic constituents from reclaimed water in groundwater, Los Angeles County, California  

USGS Publications Warehouse

The nature and chlorine reactivity of organic constituents in reclaimed water (tertiary-treated municipal wastewater) before, during, and after recharge into groundwater at the Montebello Forebay in Los Angeles County, CA, was the focus of this study. Dissolved organic matter (DOM) in reclaimed water from this site is primarily a mixture of aromatic sulfonates from anionic surfactant degradation, N-acetyl amino sugars and proteins from bacterial activity, and natural fulvic acid, whereas DOM from native groundwaters in the aquifer to which reclaimed water was recharged consists of natural fulvic acids. The hydrophilic neutral N-acetyl amino sugars that constitute 40% of the DOM in reclaimed water are removed during the first 3 m of vertical infiltration in the recharge basin. Groundwater age dating with 3H and 3He isotopes, and determinations of organic and inorganic C isotopes, enabled clear differentiation of recent recharged water from older native groundwater. Phenol structures in natural fulvic acids in DOM isolated from groundwater produced significant trihalomethanes (THM) and total organic halogen (TOX) yields upon chlorination, and these structures also were responsible for the enhanced SUVA and specific fluorescence characteristics relative to DOM in reclaimed water. Aromatic sulfonates and fulvic acids in reclaimed water DOM produced minimal THM and TOX yields.

Leenheer, J.A.; Rostad, C.E.; Barber, L.B.; Schroeder, R.A.; Anders, R.; Davisson, M.L.

2001-01-01

298

Preliminary geologic map of the Santa Barbara coastal plain area, Santa Barbara County, California  

USGS Publications Warehouse

This report presents a new geologic digital map of the Santa Barbara coastal plain area at a compilation scale of 1:24,000 (one inch on the map = 2,000 feet on the ground) and with a horizontal positional accuracy of at least 20 m. This preliminary map depicts the distribution of bedrock units and surficial deposits and associated deformation underlying and adjacent to the coastal plain within the contiguous Santa Barbara and Goleta 7.5' quadrangles. A planned second version will extend the mapping westward into the adjoining Dos Pueblos Canyon quadrangle and eastward into the Carpinteria quadrangle. The mapping presented here results from the collaborative efforts of geologists with the U.S. Geological Survey Southern California Areal Mapping Project (SCAMP) (Minor, Kellogg, Stanley, Stone, and Powell) and the tectonic geomorphology research group at the University of California at Santa Barbara (Gurrola and Selting). C.L. Powell, II, performed all new fossil identifications and interpretations reported herein. T.R. Brandt designed and edited the GIS database,performed GIS database integration and created the digital cartography for the map layout. The Santa Barbara coastal plain is located in the western Transverse Ranges physiographic province along a west-trending segment of the southern California coastline about 100 km (62 mi) northwest of Los Angeles. The coastal plain region, which extends from the Santa Ynez Mountains on the north to the Santa Barbara Channel on the south, is underlain by numerous active and potentially active folds and partly buried thrust faults of the Santa Barbara fold and fault belt. Strong earthquakes that occurred in the region in 1925 (6.8 magnitude) and 1978 (5.1 magnitude) are evidence that such structures pose a significant earthquake hazard to the approximately 200,000 people living within the major coastal population centers of Santa Barbara and Goleta. Also, young landslide deposits along the steep lower flank of the Santa Ynez Mountains indicate the potential for continued slope failures and mass movements that may threaten urbanized parts of the coastal plain. Deformed sedimentary rocks in the subsurface of the coastal plain and the adjacent Santa Barbara Channel contain deposits of oil and gas, some of which are currently being extracted. Shallow, localized sedimentary aquifers underlying the coastal plain provide limited amounts of water for the urban areas, but the quality of some of this groundwater is compromised by coastal salt-water contamination. The present map compilation provides a set of uniform geologic digital coverages that can be used for analysis and prediction of these and other geologic hazards and resources in the coastal plain region. In the map area the oldest stratigraphic units consist of resistant Eocene to Oligocene marine and terrestrial sedimentary rocks that form a mostly southward-dipping and laterally continuous sequence along the south flank of the Santa Ynez Mountains. Less resistant, but more variably deformed, Miocene, Pliocene, and Pleistocene marine sedimentary rocks and deposits are exposed in the lower Santa Ynez foothills and in the coastal hills and sea cliffs farther south. Pleistocene and Holocene surficial alluvial, colluvial, estuarine, and marine-terrace deposits directly underlie much of the low-lying coastal plain area, and similar-aged alluvial and landslide deposits locally mantle the lower flanks of the Santa Ynez Mountains. Structurally, the Santa Barbara coastal plain area is dominated by the Santa Barbara fold and fault belt, an east-west-trending zone of Quaternary, partly active folds and blind and exposed reverse and thrust faults. The dominant trend of individual structures within the belt is west-northwest -- slightly oblique to the overall trend of the fold and fault belt. A conspicuous exception, however, is the More Ranch fault system, which strikes east-northeast across the fold and f

Minor, Scott A.; Kellogg, Karl S.; Stanley, Richard G.; Stone, Paul; Powell, Charles L.; Gurrola, Larry D.; Selting, Amy J.; Brandt, Theodore R.

2002-01-01

299

Artificial recharge in the Waterman Canyon-East Twin Creek area, San Bernardino County, California  

USGS Publications Warehouse

This is a study of the feasibility of recharging, in the Waterman Canyon-East Twin Creek area, imported water from northern California by way of the State Water Project beginning in 1972. The feasibility of recharging 30,000 acre-feet of water a year in the Waterman Canyon-East Twin Creek area will depend on the effectiveness of fault K as a barrier to ground-water movement near the land surface. The results of test drilling and an infiltration test indicate that the subsurface material at the spreading grounds is permeable enough to allow recharged water to percolate to the water table. The data indicate that fault K extends into the Waterman Canyon-East Twin Creek area and may impede the lateral movement of recharged water. Fault K has no known surface expression and therefore probably does not affect the highly permeable younger alluvium. If that is so, fault K will be less effective as a barrier to ground-water movement as the recharge mound rises. Monitoring of the observation wells near the spreading grounds as the planned recharge operation proceeds should provide data about the hydrologic effects of fault K near the land surface.

Warner, J.W.; Moreland, J.A.

1973-01-01

300

Geohydrology of part of the Round Valley Indian Reservation, Mendocino County, California  

USGS Publications Warehouse

The Round Valley Indian Reservation in northern California obtains most of its water from the ground-water reservoir. The ground-water reservoir is made up of continental deposits, alluvium, and stream-channel deposits ranging in age from Pliocene to Holocene. Most of the water is pumped from the alluvium. Most ground water (about 20,000 acre-feet or 25 cubic hectometers per year) is derived from stream seepage. Natural discharge (discharge to streams, evapotranspiration, and underflow) has averaged about 21,000 acre-feet per year. Pumping and flow from artesian wells has averaged about 2,750 acre-feet per year. Ground water occurs in both confined and unconfined aquifers. The ground-water reservoir is full, and about 230,000 acre-feet of water is stored in the depth interval 10-200 feet. The water is chemically and biologically suitable for domestic or irrigation use, although hardness is high for domestic use and, locally, dissolved iron is a problem. There is potential for developing additional ground-water supplies. (Woodard-USGS)

Muir, K.S.; Webster, Dwight Albert

1977-01-01

301

A debris avalanche at Forest Falls, San Bernardino County, California, July 11, 1999  

USGS Publications Warehouse

The community of Forest Falls, California, is frequently subject to relatively slow moving debris flows. Some 11 debris flow events that were destructive to property have been recorded between 1955 and 1998. On July 11 and 13, 1999, debris flows again occurred, produced by high-intensity, short-duration monsoon rains. Unlike previous debris flow events, the July 11 rainfall generated a high-velocity debris avalanche in Snow Creek, one of the several creeks crossing the composite, debris flow dominated, alluvial fan on which Forest Falls is located. This debris avalanche overshot the bank of the active debris flow channel of Snow Creek, destroying property in the near vicinity and taking a life. The minimum velocity of this avalanche is calculated to have been in the range of 40 to 55 miles per hour. Impact from high-velocity boulders removed trees where the avalanche overshot the channel bank. Further down the fan, the rapidly moving debris fragmented the outer parts of the upslope side of large pine trees and embedded rock fragments into the tree trunks. Unlike the characteristic deposits formed by debris flows, the avalanche spread out down-slope and left no deposit suggestive of a debris avalanche. This summer monsoon-generated debris avalanche is apparently the first recorded for Forest Falls. The best indications of past debris avalanches may be the degree of permanent scars produced by extensive abrasion and splintering of the outer parts of pine trees that were in the path of an avalanche.

Morton, Douglas M.; Hauser, Rachel M.

2001-01-01

302

Geohydrology and mathematical simulation of the Pajaro Valley aquifer system, Santa Cruz and Monterey counties, California  

USGS Publications Warehouse

Groundwater development has resulted in lowered water levels and seawater intrusion in the Pajaro Valley, California. An investigation was undertaken to describe the geohydrology of the groundwater flow system and to evaluate the response of the system to pumping stresses by using a mathematical model. The aquifer system consists of three aquifers. The lower aquifer is in fluvial sequences of Quaternary Aromas Sand below interbedded clay layers. The middle aquifer is in upper fluvial and lower eolian sequence of Aromas Sand, and in overlying basal gravels in terrace deposits and alluvium. Weathered soil zones in the Aromas Sand, and clay layers in the terrace deposits and alluvium overlie the middle aquifer. The upper aquifer is actually many discontinuous water bearing zones in the Aromas Sand, terrace deposits, alluvium, and dune sand. The three aquifers are represented in the mathematical model by three model layers separated by two confining layers. Model-generated water budgets for the 11-year simulation period show that storage decreased by 23,000 acre-ft, mostly during the 1976-77 drought. The calibrated model can simulate, with acceptable accuracy, both semiannual and long-term trends of potentiometric heads in parts of the lower and middle layers. (USGS)

Johnson, M.J.; Londquist, C.J.; Laudon, Julie; Mitten, H.T.

1988-01-01

303

Management by assertion: beavers and songbirds at Lake Skinner (Riverside County, California).  

PubMed

Management of ecological reserve lands should rely on the best available science to achieve the goal of biodiversity conservation. "Adaptive Resource Management" is the current template to ensure that management decisions are reasoned and that decisions increase understanding of the system being managed. In systems with little human disturbance, certain management decisions are clear; steps to protect native species usually include the removal of invasive species. In highly modified systems, however, appropriate management steps to conserve biodiversity are not as readily evident. Managers must, more than ever, rely upon the development and testing of hypotheses to make rational management decisions. We present a case study of modern reserve management wherein beavers (Castor canadensis) were suspected of destroying habitat for endangered songbirds (least Bell's vireo, Vireo bellii pusillus, and southwestern willow flycatcher, Empidonax traillii extimus) and for promoting the invasion of an exotic plant (tamarisk, Tamarix spp.) at an artificial reservoir in southern California. This case study documents the consequences of failing to follow the process of Adaptive Resource Management. Managers made decisions that were unsupported by the scientific literature, and actions taken were likely counterproductive. The opportunity to increase knowledge of the ecosystem was lost. Uninformed management decisions, essentially "management by assertion," undermine the long-term prospects for biodiversity conservation. PMID:17318698

Longcore, Travis; Rich, Catherine; Müller-Schwarze, Dietland

2007-04-01

304

Hydrologic data, 1974-77, Stovepipe Wells Hotel area, Death Valley National Monument, Inyo County, California  

USGS Publications Warehouse

Ground-water levels in most wells did not change significantly from 1974 to 1977 in the Stovepipe Wells Hotel area, California. The average water-level decline was less than 0.10 foot between August 1974 and August 1977 in 10 observation wells. Water-level contours show a depression centered on the two pumping wells, but this depression existed before the National Park Service started pumping its well. The chemical quality of the ground water is poor. Dissolved-solids concentrations in water samples ranged from 2,730 to 6,490 milligrams per liter. Analyses of water samples from two wells showed large changes in some constituents from 1976 to 1977. Streamflow in Salt Creek has been monitored since February 1974. Base flow is seasonal, being 0.10 to 0.20 cubic foot per second during the summer and as much as three times that amount during the winter. Two chemical analyses of water from Salt Creek, representing summer and winter flow conditions, show large differences for many constituents. (Woodard-USGS)

Lamb, Charles Edwin; Downing, D.J.

1979-01-01

305

Preliminary report on part of the Oat Hill quicksilver mine, Mayacmas district, Napa County, California  

USGS Publications Warehouse

Oat Hill quicksilver mine, located in the Mayacmas district of northern California, and credited with having produced more than 160,000 flasks of quicksilver, was sampled cooperatively by the Buray of Mines and Geological Survey during 1944. 28 diamond drill holes totaling 8,120 feet were drilled by the Bureau of Mines in four of the six principal veins to sample virgin low-grade reserves and stope fill, and reserves in the other two veins were estimated from existing underground workings and by inferences from drill holes in nearby veins. The writer estimates a total of 10,220 flasks of quicksilver in indicated and inferred reserves totaling 320,000 tons. Indicated reserves minable under 1943 conditions are estimated at 1,960 flasks of quicksilver in 75,000 tons averaging 3.0 lbs Hg per ton. Inferred reserves minable under 1943 conditions are estimated at 4,640 flasks of quicksilver in 109,920 tons averaging about 3.2 lbs Hg per ton. Inferred reserves believed minable only under economic conditions much more favorable than even those of 1943 are estimated at 2,620 flasks of quicksilver in 135,080 tons averaging a little less than 1.5 lbs Hg per ton. About two-thirds of the indicated reserves are accessible in underground workings. All other reserves are estimated approximately without access underground. Several areas not sampled may possibly contain reserves.

Fix, Philip Forsyth

1955-01-01

306

Controlled Landfill Project in Yolo County, California for Environmental Benefits of Waste Stabilization and Minimization of Greenhouse Gas Emissions  

NASA Astrophysics Data System (ADS)

The Department of Public Works of Yolo County, California, USA has been testing an advanced approach to landfill bioreactors, controlled (or "enhanced") landfilling, at its Yolo County Central Landfill site near Davis, CA, since 1994. Overall objectives have been the management of waste landfilling for: (1) rapid completion of total gas generation; (2) maximum, high-efficiency gas capture; (3) waste volume reduction; and (4) maximum greenhouse gas and carbon sequestration benefits. Methane generation is controlled and enhanced through carefully managed moisture additions, and by taking advantage of landfill temperature elevation. The generated landfill methane, an important greenhouse gas, is recovered with high efficiency through extraction from a porous recovery layer beneath a surface geomembrane cover. Instrumentation included a total of 56 moisture and 15 temperature sensors in the two cells, gas flow monitoring by positive displacement gas meters, and accurate quantification of liquid inputs and outputs. Gas composition, waste volume reduction, base hydrostatic head, and a range of environmental compliance parameters has been monitored since 1995. Partitioning gas tracer tests using the injection of two gases at dilute concentrations in the landfill have also been initiated to compute the fraction of pore space occupied by water between the points of tracer injection and tracer measurement. There has been rapid waste volume reduction in the enhanced cell that corresponds to the solids' reduction to gas. Monitoring is planned for the next several years, until stabilization parameters are determined complete. Encouraging performance is indicated by: (1) sensor data; (2) gas generation results; (3) data from landfill cores; and (4) decomposition-related indicators including rapid volume reduction. When data are synthesized, project results have attractive implications for new approaches to landfill management. Over seven-years, methane recoveries have averaged over fivefold the "typical" values for comparable landfill waste. In terms of "greenhouse benefit," fractional VOC and methane energy recovery are estimated to exceed 90%, with corresponding methane and VOC emission reductions. Analyses done for the greenhouse gas mitigation program of the U.S. Department of Energy National Energy Technology Laboratory indicate favorable economics justified on landfill life extension, as well as environmental benefits. The "controlled landfill" project findings suggest potential for low-cost mitigation of waste greenhouse methane emissions, maximum landfill carbon sequestration, and maximization of beneficial energy capture from landfills. Details and results obtained since 1994 will be presented.

Yazdani, R.; Augenstein, D.; Kieffer, J.; Cohen, K.

2003-12-01

307

Geologic and Geophysical Framework of the Santa Rosa 7.5' Quadrangle, Sonoma County, California  

USGS Publications Warehouse

The geologic and geophysical maps of Santa Rosa 7.5? quadrangle and accompanying structure sections portray the sedimentary and volcanic stratigraphy and crustal structure of the Santa Rosa 7.5? quadrangle and provide a context for interpreting the evolution of volcanism and active faulting in this region. The quadrangle is located in the California Coast Ranges north of San Francisco Bay and is traversed by the active Rodgers Creek, Healdsburg and Maacama Fault Zones. The geologic and geophysical data presented in this report, are substantial improvements over previous geologic and geophysical maps of the Santa Rosa area, allowing us to address important geologic issues. First, the geologic mapping is integrated with gravity and magnetic data, allowing us to depict the thicknesses of Cenozoic deposits, the depth and configuration of the Mesozoic basement surface, and the geometry of fault structures beneath this region to depths of several kilometers. This information has important implications for constraining the geometries of major active faults and for understanding and predicting the distribution and intensity of damage from ground shaking during earthquakes. Secondly, the geologic map and the accompanying description of the area describe in detail the distribution, geometry and complexity of faulting associated with the Rodgers Creek, Healdsburg and Bennett Valley Fault Zones and associated faults in the Santa Rosa quadrangle. The timing of fault movements is constrained by new 40Ar/39Ar ages and tephrochronologic correlations. These new data provide a better understanding of the stratigraphy of the extensive sedimentary and volcanic cover in the area and, in particular, clarify the formational affinities of Pliocene and Pleistocene nonmarine sedimentary units in the map area. Thirdly, the geophysics, particularly gravity data, indicate the locations of thick sections of sedimentary and volcanic fill within ground water basins of the Santa Rosa plain and Rincon, Bennett, and northwestern Sonoma Valleys, providing geohydrologists a more realistic framework for groundwater flow models.

McLaughlin, R.J.; Langenheim, V.E.; Sarna-Wojcicki, A. M.; Fleck, R.J.; McPhee, D.K.; Roberts, C.W.; McCabe, C.A.; Wan, Elmira

2008-01-01

308

The HUMBOLDT High Magnetic Field Center in Berlin  

Microsoft Academic Search

We introduce concept and possibilities of the HUMBOLDT High Magnetic Field Center at the Physics Department of the HUMBOLDT-University in Berlin. The facility includes steady and pulsed magnetic fields up to the megagauss regime. In detail steady magnetic fields using a superconducting solenoid up to 20 T, pulsed fields up to 50 T using nondestructive coils, and megagauss fields using

M. von Ortenberg; O. Portugall; H.-U. Müller; N. Puhlmann; M. Thiede; G. Machel; M. Barczewski; J. Breitlow-Hertzfeld

1994-01-01

309

Wilhelm von Humboldt and the "Orient": On Edward W. Said's Remarks on Humboldt's Orientalist Studies  

ERIC Educational Resources Information Center

From an epistemological perspective, Wilhelm von Humboldt's studies on the Oriental and East Asian languages and writing systems (Egyptian hieroglyphs, Sanskrit, Chinese, Polynesian) raise the question of his position in the Orientalist discourse of his time. Said [Said, E.W., 1978. "Orientalism. Western Conceptions of the Orient, fourth ed."…

Messling, Markus

2008-01-01

310

Characterization of the hydrologic and transport properties of the shallow aquifer under Kesterson Reservoir, Merced County, California  

SciTech Connect

A detailed investigation of hydrologic and transport properties of the shallow aquifer underlying the selenium-contaminated Kesterson Reservoir, Merced County, California has been carried out. The aquifer is composed of a sequence of sands, silts, and clays deposited on the flood plain of the San Joaquin River. Transport properties were evaluated by two multiple well tracer experiments. A new method for interpreting observation well data from a two-well recirculating tracer test in the presence of multiple flow paths was developed and applied to these experiments. The model explicitly includes the effects of the sampling device (the well) on the shape of the tracer breakthrough curves. The model was used to interpret both non-reactive and reactive transport. Non-reactive tracer experiments were used to evaluate mesoscale heterogeneity of the aquifer. Experiments indicate that the tracer traveled from the injection well to the observation wells along discrete flow paths and within each flow path dispersion was controlled by pore-level mixing. The thickness of the individual flow paths averaged 0.28 m and dispersivity values for travel distances of 15 m averaged 0.03 m. Overall, dispersion of the tracer pulse was most strongly affected by the wide range of advection rates along the many flow paths intersecting each monitoring well. Velocities along comparable flow paths ranged over an order of magnitude within a 6.1 m-thick interval of the sandy aquifer. By repeating the same experiment with the flow field rotated 90{degree} with respect to the first experiment, it was shown that many of the layers are not continuous and/or do not have uniform hydrologic properties over lateral distances of more than 15 m. Rates of denitrification and selenium immobilization were also measured in these tracer experiments.

Benson, S.M.

1988-01-01

311

Evaluation of strength degradation in seismic loading of Holocene bay mud from Marin County, California  

NASA Astrophysics Data System (ADS)

Cyclic simple shear tests performed on Holocene bay mud at the University of California at Berkeley following the 1989 Loma Prieta earthquake, suggested that the response of silty clay to cyclic loading might be more severe than earlier research had indicated. A program of laboratory testing was therefore carried out to investigate the potential strength degradation of Holocene bay mud subjected to a range of conditions representative of those expected in a major earthquake. The results show that the volumetric cyclic threshold shear strain is between 0.02% and 0.04%. The reduction of shear modulus with increasing strain amplitude is generally consistent with data presented in an earlier study on Holocene bay mud from another location. The damping ratios for the first cycle of loading are consistent with the limits suggested for cohesive soils from earlier studies. The shear stress in the first cycle of loading exhibits approximately a 13--16% increase per order of magnitude increase in strain rate, which is on the higher end of the range of values presented in studies on other cohesive soils. The post-cyclic monotonic strengths are within +/-10% of the monotonic strengths of specimens that had not undergone cyclic loading. There were no clear effects of varying the strain amplitude, frequency of loading, or strain rate, but dissipation of pore pressures between the' end of cyclic loading and the beginning of monotonic shear increases the strength by an average of 8%. One-dimensional site response analysis was performed to estimate the amplitude and number of cycles of shear strain in moderate to large earthquakes, and it showed that up to five cycles or more of shear strain amplitudes exceeding I% could be expected. Therefore, the strength degradation that was observed in the cyclic testing is within the range of interest for geotechnical earthquake engineering. A comparison between the cyclic response of the specimens from Hamilton Air Force Base and specimens tested in the earlier study from the Marina District in San Francisco proved of particular interest. The Marina District specimens exhibited a significantly more severe degradation both during and after cyclic loading, especially for cyclic strains exceeding 1%. Finally, available geotechnical literature and data were reviewed to provide an understanding of the variation of physical properties of Holocene bay mud across the bay area. The engineering characteristics of Holocene bay mud vary considerably across the region; the plasticity index reported for bay mud ranges from 14 to 64. An important conclusion of this study is that the cyclic response of Holocene bay mud should be considered in the context of the engineering index characteristics at a particular location and depth. (Abstract shortened by UMI.)

Rau, Gretchen Anne

312

Environmental assessment of water, sediment, and biota collected from the Bear Creek watershed, Colusa County, California  

USGS Publications Warehouse

The Cache Creek watershed lies within California's North Coast Range, an area with abundant geologic sources of mercury (Hg) and a long history of Hg contamination (Rytuba, 2000). Bear Creek, Cache Creek, and the North Fork of Cache Creek are the major streams of the Cache Creek watershed, encompassing 2978 km2. The Cache Creek watershed contains soils naturally enriched in Hg as well as natural springs (both hot and cold) with varying levels of aqueous Hg (Domagalski and others, 2004, Suchanek and others, 2004, Holloway and others 2009). All three tributaries are known to be significant sources of anthropogenically derived Hg from historic mines, both Hg and gold (Au), and associated ore storage/processing sites and facilities (Slotton and others, 1995, 2004; CVRWQCB, 2003; Schwarzbach and others, 2001; Gassel and others, 2005; Suchanek and others., 2004, 2008a, 2009). Historically, two of the primary sources of mercury contamination in the upper part of Bear Creek have been the Rathburn and Petray Hg Mines. The Rathburn Hg mine was discovered and initially mined in the early 1890s. The Rathburn and the more recently developed Petray open pit mines are localized along fault zones in serpentinite that has been altered and cut by quartz and chalcedony veins. Cold saline-carbonate springs are located perepheral to the Hg deposits and effluent from the springs locally has high concentrations of Hg (Slowey and Rytuba, 2008). Several ephemeral tributaries to Bear Creek drain the mine area which is located on federal land managed by the U.S. Bureau of Land Management (USBLM). The USBLM requested that the U.S. Geological Survey (USGS) measure and characterize Hg and other geochemical constituents in sediment, water, and biota to establish baseline information prior to remediation of the Rathburn and Petray mines. Samples sites were established in Bear Creek upstream and downstream from the mine area. This report is made in response to the USBLM request, the lead agency mandated to conduct a Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) - Removal Site Investigation (RSI). The RSI applies to the possible removal of Hg-contaminated mine waste from Bear Creek. This report summarizes data obtained from field sampling of water, sediment, and biota in Bear Creek, above input from the mine area and downstream from the Rathburn-Petray mine area to the confluence with Cache Creek. Our results permit a preliminary assessment of the chemical constituents that could elevate levels of monomethyl Hg (MMeHg) in Bear Creek and its uptake by biota and provide baseline information for comparison to conditions after mine remediation is completed.

Rytuba, James J.; Hothem, Roger L.; Brussee, Brianne E.; Goldstein, Daniel; May, Jason

2015-01-01

313

Humboldt slide - A large shear-dominated retrogressive slope failure  

USGS Publications Warehouse

Humboldt Slide is a large, complex slide zone located on the northern California continental margin. Its three-dimensional architecture has been imaged by a combination of multibeam bathymetry, Huntec Deep-Tow seismic profiling, and sidescan sonar. The slide is interpreted to be Late Pleistocene to early Holocene in age and was caused by a combination of factors. The area of the slide is a local depocenter with high accumulation rates of organic-rich sediment; there has been local steepening of slopes by tectonic uplifts; and the entire area is one of high seismicity. Overall, the failure occurred by retrogressive, shear-dominated, minimum movement apparently as a sequence of events. Failure initially occurred by subsidence extension at the middle of the feature, followed by upslope retrogressive failure and downslope compression, and finally by translational sliding at the top of the slide. Degassing, as evidenced by abundant pockmarks, may have inhibited downslope translation. The slide may still be active, as suggested by offsets in Holocene hemipelagic sediment draped over some of the shear surfaces. Crown cracks occur above the present head of the failure and may represent the next generation of failure.

Gardner, J.V.; Prior, D.B.; Field, M.E.

1999-01-01

314

50 CFR Table 6 to Part 226 - Hydrologic Units and Counties Containing Critical Habitat for Southern Oregon/Northern California...  

Code of Federal Regulations, 2012 CFR

...Oregon/Northern California Coasts Coho Salmon, Tribal Lands Within the Range of the...Oregon/Northern California Coasts Coho Salmon, Tribal Lands Within the Range of the...Lewiston Dam (Lewiston Reservoir). Salmon 18010210 Siskiyou (CA) Lower...

2012-10-01

315

50 CFR Table 5 to Part 226 - Hydrologic Units and Counties Containing Critical Habitat for Central California Coast Coho...  

Code of Federal Regulations, 2013 CFR

...Habitat for Central California Coast Coho Salmon, Tribal Lands Within the Range of the...Habitat for Central California Coast Coho Salmon, Tribal Lands Within the Range of the...Coyote Dam (Lake Mendocino). Gualala-Salmon 18010109 Sonoma (CA),...

2013-10-01

316

50 CFR Table 5 to Part 226 - Hydrologic Units and Counties Containing Critical Habitat for Central California Coast Coho...  

Code of Federal Regulations, 2010 CFR

...Habitat for Central California Coast Coho Salmon, Tribal Lands Within the Range of the...Habitat for Central California Coast Coho Salmon, Tribal Lands Within the Range of the...Coyote Dam (Lake Mendocino). Gualala-Salmon 18010109 Sonoma (CA),...

2010-10-01

317

50 CFR Table 5 to Part 226 - Hydrologic Units and Counties Containing Critical Habitat for Central California Coast Coho...  

Code of Federal Regulations, 2011 CFR

...Habitat for Central California Coast Coho Salmon, Tribal Lands Within the Range of the...Habitat for Central California Coast Coho Salmon, Tribal Lands Within the Range of the...Coyote Dam (Lake Mendocino). Gualala-Salmon 18010109 Sonoma (CA),...

2011-10-01

318

50 CFR Table 6 to Part 226 - Hydrologic Units and Counties Containing Critical Habitat for Southern Oregon/Northern California...  

Code of Federal Regulations, 2010 CFR

...Oregon/Northern California Coasts Coho Salmon, Tribal Lands Within the Range of the...Oregon/Northern California Coasts Coho Salmon, Tribal Lands Within the Range of the...Lewiston Dam (Lewiston Reservoir). Salmon 18010210 Siskiyou (CA) Lower...

2010-10-01

319

50 CFR Table 6 to Part 226 - Hydrologic Units and Counties Containing Critical Habitat for Southern Oregon/Northern California...  

Code of Federal Regulations, 2011 CFR

...Oregon/Northern California Coasts Coho Salmon, Tribal Lands Within the Range of the...Oregon/Northern California Coasts Coho Salmon, Tribal Lands Within the Range of the...Lewiston Dam (Lewiston Reservoir). Salmon 18010210 Siskiyou (CA) Lower...

2011-10-01

320

50 CFR Table 6 to Part 226 - Hydrologic Units and Counties Containing Critical Habitat for Southern Oregon/Northern California...  

Code of Federal Regulations, 2013 CFR

...Oregon/Northern California Coasts Coho Salmon, Tribal Lands Within the Range of the...Oregon/Northern California Coasts Coho Salmon, Tribal Lands Within the Range of the...Lewiston Dam (Lewiston Reservoir). Salmon 18010210 Siskiyou (CA) Lower...

2013-10-01

321

50 CFR Table 5 to Part 226 - Hydrologic Units and Counties Containing Critical Habitat for Central California Coast Coho...  

Code of Federal Regulations, 2012 CFR

...Habitat for Central California Coast Coho Salmon, Tribal Lands Within the Range of the...Habitat for Central California Coast Coho Salmon, Tribal Lands Within the Range of the...Coyote Dam (Lake Mendocino). Gualala-Salmon 18010109 Sonoma (CA),...

2012-10-01

322

78 FR 36823 - California High-Speed Rail Authority-Construction Exemption-in Merced, Madera and Fresno Counties...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Merced and Fresno, California (the Project). The Project would be the first section of the statewide California High-Speed Train System. This exemption is subject to environmental mitigation conditions and the condition that the Authority build the...

2013-06-19

323

Geohydrology and water-chemistry of the Alexander Valley, Sonoma County, California  

USGS Publications Warehouse

This study of the geohydrology and water chemistry of the Alexander Valley, California, was done to provide an improved scientific basis for addressing emerging water-management issues, including potential increases in water demand and changes in flows in the Russian River. The study tasks included (1) evaluation of existing geohydrological, geophysical, and geochemical data; (2) collection and analysis of new geohydrologic data, including subsurface lithologic data, ground-water levels, and streamflow records; and (3) collection and analysis of new water-chemistry data. The estimated total water use for the Alexander Valley for 1999 was approximately 15,800 acre-feet. About 13,500 acre-feet of this amount was for agricultural use, primarily vineyards, and about 2,300 acre-feet was for municipal/industrial use. Ground water is the main source of water supply for this area. The main sources of ground water in the Alexander Valley are the Quaternary alluvial deposits, the Glen Ellen Formation, and the Sonoma Volcanics. The alluvial units, where sufficiently thick and saturated, comprise the best aquifer in the study area. Average recharge to the Alexander Valley is estimated from a simple, basinwide water budget. On the basis of an estimated annual average of 298,000 acre-feet of precipitation, 160,000 acre-feet of runoff, and 113,000 to 133,000 acre-feet of evapotranspiration, about 5,000 to 25,000 acre-feet per year is available for ground-water recharge. Because this estimate is based on differences between large numbers, there is significant uncertainty in this recharge estimate. Long-term changes in ground-water levels are evident in parts of the study area, but because of the sparse network and lack of data on well construction and lithology, it is uncertain if any significant changes have occurred in the northern part of the study area since 1980. In the southern half of the study area, ground-water levels generally were lower at the end of the 2002 irrigation season than at the end of the 1980 season, which suggests that a greater amount of ground water is being pumped in the southern half of the study area in recent years compared with that pumped in the early 1980s. Water-chemistry data for samples collected from 11 wells during 2002-04 indicate that water quality in the study area generally is acceptable for potable use. Two wells, however, each contained one constituent (241 ?g/L of manganese and 1,350 ?g/L of boron) in excess of the recommended standards for drinking water (50 ?g/L and 1,000 ?g/L, respectively). The chemical composition of water from most of the wells sampled for major ions plot as a mixed cation-bicarbonate, magnesium-bicarbonate, or calcium-bicarbonate type water. The ionic composition of the historical and recent samples from wells in the Alexander Valley is similar to that of the historical surface-water samples collected from the Russian River near Healdsburg. This suggests a similar source of water, particularly for wells that are less than 200 feet total depth and perforated in Quaternary alluvial deposits. Water from deeper, non-alluvial wells may contain slightly higher concentrations of sodium as a result of cation exchange. Water samples collected from several wells over an approximately 30-year period suggest a progressive change in water chemistry over time. Samples from the southern part of the valley show a trend towards higher ionic concentrations and increasing concentrations of particular constituents such as sulfate.

Metzger, Loren F.; Farrar, Christopher D.; Koczot, Kathryn M.; Reichard, Eric G.

2006-01-01

324

Geologic Map of the Santa Barbara Coastal Plain Area, Santa Barbara County, California  

USGS Publications Warehouse

This report presents a newly revised and expanded digital geologic map of the Santa Barbara coastal plain area at a compilation scale of 1:24,000 (one inch on the map to 2,000 feet on the ground)1 and with a horizontal positional accuracy of at least 20 m. The map depicts the distribution of bedrock units and surficial deposits and associated deformation underlying and adjacent to the coastal plain within the contiguous Dos Pueblos Canyon, Goleta, Santa Barbara, and Carpinteria 7.5' quadrangles. The new map supersedes an earlier preliminary geologic map of the central part of the coastal plain (Minor and others, 2002; revised 2006) that provided coastal coverage only within the Goleta and Santa Barbara quadrangles. In addition to new mapping to the west and east, geologic mapping in parts of the central map area has been significantly revised from the preliminary map compilation - especially north of downtown Santa Barbara in the Mission Ridge area - based on new structural interpretations supplemented by new biostratigraphic data. All surficial and bedrock map units, including several new units recognized in the areas of expanded mapping, are described in detail in the accompanying pamphlet. Abundant new biostratigraphic and biochronologic data based on microfossil identifications are presented in expanded unit descriptions of the marine Neogene Monterey and Sisquoc Formations. Site-specific fault kinematic observations embedded in the digital map database are more complete owing to the addition of slip-sense determinations. Finally, the pamphlet accompanying the present report includes an expanded and refined summary of stratigraphic and structural observations and interpretations that are based on the composite geologic data contained in the new map compilation. The Santa Barbara coastal plain is located in the western Transverse Ranges physiographic province along an east-west-trending segment of the southern California coastline about 100 km (62 mi) northwest of Los Angeles. The coastal plain surface includes several mesas and hills that are geomorphic expressions of potentially active folds and partly buried oblique and reverse faults of the Santa Barbara fold and fault belt (SBFFB) that transects the coastal plain. Strong earthquakes have occurred offshore within 10 km of the Santa Barbara coastal plain in 1925 (6.3 magnitude), 1941 (5.5 magnitude), and 1978 (5.1 magnitude). These and numerous smaller seismic events located beneath and offshore of the coastal plain, likely occurred on reverse-oblique-slip faults that are similar to, or continuous with, Quaternary reverse faults crossing the coastal plain. Thus, faults of the SBFFB pose a significant earthquake hazard to the approximately 200,000 people living within the major coastal population centers of Santa Barbara, Goleta, and Carpinteria. In addition, numerous Quaternary landslide deposits along the steep southern flank of the Santa Ynez Mountains indicate the potential for continued slope failures and mass movements in developed areas. Folded, faulted, and fractured sedimentary rocks in the subsurface of the coastal plain and adjacent Santa Barbara Channel are sources and form reservoirs for economic deposits of oil and gas, some of which are currently being extracted offshore. Shallow, localized sedimentary aquifers underlying the coastal plain provide limited amounts of water for the urban areas, but the quality of some of this groundwater is compromised by coastal salt-water contamination. The present map compilation provides a set of uniform geologic digital coverages that can be used for analysis and interpretation of these and other geologic hazards and resources in the coastal plain region.

Minor, Scott A.; Kellogg, Karl S.; Stanley, Richard G.; Gurrola, Larry D.; Keller, Edward A.; Brandt, Theodore R.

2009-01-01

325

Preliminary Geologic Map of the Hemet 7.5' Quadrangle, Riverside County, California  

USGS Publications Warehouse

The Hemet 7.5' quadrangle is located near the eastern edge of the Perris block of the Peninsular Ranges batholith. The northeastern corner of the quadrangle extends across the San Jacinto Fault Zone onto the edge of the San Jacinto Mountains block. The Perris block is a relatively stable area located between the Elsinore Fault Zone on the west and the San Jacinto Fault Zone on the east. Both of the fault zones are active; the San Jacinto being the seismically most active in southern California. The fault zone is obscured by very young alluvial deposits. The concealed location of the San Jacinto Fault Zone shown on this quadrangle is after Sharp, 1967. The geology of the quadrangle is dominated by Cretaceous tonalite formerly included in the Coahuila Valley pluton of Sharp (1967). The northern part of Sharp's Coahuila Valley pluton is separated out as the Hemet pluton. Tonalite of the Hemet pluton is more heterogeneous than the tonalite of the Coahuila Valley pluton and has a different sturctural pattern. The Coahuila Valley pluton consists of relatively homogeneous hornblende-biotite tonalite, commonly with readily visible large euhedral honey-colored sphene crystals. Only the tip of the adjacent Tucalota Valley pluton, another large tonalite pluton, extends into the quadrangle. Tonalite of the Tucalota Valley pluton is very similar to the tonalite of the Coahuila Valley pluton except it generally lacks readily visible sphene. In the western part of the quadrangle a variety of amphibolite grade metasedimentary rocks are informally referred to as the rocks of Menifee Valley; named for exposures around Menifee Valley west of the Hemet quadrangle. In the southwestern corner of the quadrangle a mixture of schist and gneiss marks a suture that separated low metamorphic grade metasedimentary rocks to the west from high metamorphic grade rocks to the east. The age of these rocks is interpreted to be Triassic and the age of the suturing is about 100 Ma, essentially the same age as the adjacent Coahuila Valley pluton. Rocks within the suture zone consist of a mixture of lithologies from both sides of the suture. Gneiss, schist, and anatectic gneiss are the predominate lithologies within the rocks on the east side of the suture. Lesser amounts of metalithic greywacke and lenticular masses of black amphibolite are subordinate rock types. Biotite, biotite-sillimanite and lesser amounts of garnet-biotite-sillimanite schist and metaquartzite-metalithic greywacke lithologies occur west of the suture. Pleistocene continental beds, termed the Bautista beds occur east of the San Jacinto Fault Zone in the northeast corner of the quadrangle. Most of the Bautista beds were derived from the San Jacinto pluton that is located just to the east of the sedimentary rocks. Along the northern part of the quadrangle is the southern part of a large Holocene-late Pleistocene fan emanating from Baustista Canyon. Sediments in the Bautista fan are characterized by their content of detritus derived from amphibolite grade metasedimentary rocks located in the Bautista Canyon drainage. Between the Holocene-late Pleistocene Bautista fan and the Santa Rosa Hills is the remnant of a much older Bautista Canyon alluvial fan. A pronounced Holocene-late Pleistocene channel was developed along the south fringe of the very old alluvial fan and the Santa Rosa Hill. A now dissected late to middle Pleistocene alluvial complex was produced by the coalesced fans of Goodhart, St. Johns, and Avery canyons, and Cactus Valley. Pleistocene continental beds, termed the Bautista beds occur east of the San Jacinto Fault Zone in the northeast corner of the quadrangle. Most of the Bautista beds were derived from the San Jacinto pluton that is located just to the east of the sedimentary rocks. Along the northern part of the quadrangle is the southern part of a large Holocene-late Pleistocene fan emanating from Baustista Canyon. Sediments in the Bautista fan are characterized by

Morton, Douglas M.; Matti, Jon C.

2005-01-01

326

Late Cenozoic Geology and Lacustrine History of Searles Valley, Inyo and San Bernardino Counties, California  

USGS Publications Warehouse

Searles Valley is an arid, closed basin lying 70 km east of the south end of the Sierra Nevada, California. It is bounded on the east and northeast by the Slate Range, on the west by the Argus Range and Spangler Hills, and on the south by the Lava Mountains; Searles (dry) Lake occupies the north-central part of the valley. During those parts of late Pliocene and Pleistocene time when precipitation and runoff from the east side of the Sierra Nevada into the Owens River were much greater than at present, a chain of as many as five large lakes was created, of which Searles Lake was third. The stratigraphic record left in Searles Valley when that lake expanded, contracted, or desiccated, is fully revealed by cores from beneath the surface of Searles (dry) Lake and partly recorded by sediments cropping out around the edge of the valley. The subsurface record is described elsewhere. This volume includes six geologic maps (scales: 1:50,000 and 1:10,000) and a text that describes the outcrop record, most of which represents sedimentation since 150 ka. Although this outcrop record is discontinuous, it provides evidence indicating the lake's water depths during each expansion, which the subsurface record does not. Maximum-depth lakes rose to the 2,280-ft (695 m) contour, the level of the spillway that led overflowing waters to Panamint Valley; that spillway is about 660 ft (200 m) above the present dry-lake surface. Several rock units of Tertiary and early Quaternary ages crop out in Searles Valley. Siltstone and sandstone of Tertiary age, mostly lacustrine in nature and locally deformed to near-vertical dips, are exposed in the southern part of the valley, as is the younger(?) upper Miocene Bedrock Spring Formation. Unnamed, mostly mafic volcanic rocks of probable Miocene or Pliocene age are exposed along the north and south edges of the basin. Slightly deformed lacustrine sandstones are mapped in the central-southwestern and southern parts of the study area. The Christmas Canyon Formation and deposits mapped as older gravel and older tufa are extensively exposed over much of the basin floor. The older gravel unit and the gravel facies of the Christmas Canyon Formation are boulder alluvial gravels; parts of these units are probably correlative. The lacustrine facies of the Christmas Canyon Formation includes the Lava Creek ash, which is dated at 0.64 Ma; the older tufa deposits may be equivalent in age to those sediments. Most of this study concerns sediments of the newly described Searles Lake Formation, whose deposition spanned the period between about 150 ka and 2 ka. Most of this formation is lacustrine in origin, but it includes interbedded alluvium. To extract as much geologic detail as possible, criteria were developed that permitted (1) intrabasin correlation of some thin outcrop units representative of only a few thousand years (or less), (2) identification of unconformities produced by subaerial erosion, (3) identification of unconformities produced by sublacustrine erosion, and (4) correlation of outcrop units with subsurface units. The Searles Lake Formation is divided into seven main units, many of which are subdivided on the five larger scale geologic maps. Units A (oldest), B, C, and D are dominantly lacustrine in origin. The Pleistocene-Holocene boundary is placed at the top of unit C. In areas that were a kilometer or more from shore at the time of deposition, deposits of units A,B, and C consist of fine, highly calcareous sand, silt, or clay; nearer to shore they consist of well-sorted coarse sand and gravel. Unit A has been locally subdivided into as many as four subunits, unit B into six subunits, and unit C into six subunits. The finer facies of units A, B, and C contain such high percentages of Caco3 that they are best described as marl. Sediments of unit C, and to a lesser extent those of unit B, are laminated with light- to white-colored layers of aragonite, calcite, or dolomite(?) that may repre

Smith, George I.

2009-01-01

327

Review of mineral estate of the United States at Naval Petroleum Reserve No. 2, Buena Vista Hills Field, Kern County, California  

SciTech Connect

The purpose of this report is to present this Consultant`s findings regarding the nature and extent of the mineral estate of the United States at National Petroleum Reserve No. 2 (NPR-2), Buena Vista Hills Field, Kern County, California. Determination of the mineral estate is a necessary prerequisite to this Consultant`s calculation of estimated future cash flows attributable to said estate, which calculations are presented in the accompanying report entitled ``Phase II Final Report, Study of Alternatives for Future Operations of the Naval Petroleum and Oil Shale Reserves, NPR-2, California.`` This Report contains a discussion of the leases in effect at NPR-2 and subsequent contracts affecting such leases. This Report also summarizes discrepancies found between the current royalty calculation procedures utilized at NPR-2 and those procedures required under applicable agreements and regulations. Recommendations for maximizing the government`s income stream at NPR-2 are discussed in the concluding section of this Report.

NONE

1996-08-09

328

Geohydrological characterization, water-chemistry, and ground-water flow simulation model of the Sonoma Valley area, Sonoma County, California  

USGS Publications Warehouse

The Sonoma Valley, located about 30 miles north of San Francisco, is one of several basins in Sonoma County that use a combination of ground water and water delivered from the Russian River for supply. Over the past 30 years, Sonoma Valley has experienced rapid population growth and land-use changes. In particular, there has been a significant increase in irrigated agriculture, predominantly vineyards. To provide a better understanding of the ground-water/surface-water system in Sonoma Valley, the U.S. Geological Survey compiled and evaluated existing data, collected and analyzed new data, and developed a ground-water flow model to better understand and manage the ground-water system. The new data collected include subsurface lithology, gravity measurements, groundwater levels, streamflow gains and losses, temperature, water chemistry, and stable isotopes. Sonoma Valley is drained by Sonoma Creek, which discharges into San Pablo Bay. The long-term average annual volume of precipitation in the watershed is estimated to be 269,000 acre-feet. Recharge to the ground-water system is primarily from direct precipitation and Sonoma Creek. Discharge from the ground-water system is predominantly outflow to Sonoma Creek, pumpage, and outflow to marshlands and to San Pablo Bay. Geologic units of most importance for groundwater supply are the Quaternary alluvial deposits, the Glen Ellen Formation, the Huichica Formation, and the Sonoma Volcanics. In this report, the ground-water system is divided into three depth-based geohydrologic units: upper (less than 200 feet below land surface), middle (between 200 and 500 feet), and lower (greater than 500 feet). Synoptic streamflow measurements were made along Sonoma Creek and indicate those reaches with statistically significant gains or losses. Changes in ground-water levels in wells were analyzed by comparing historical contour maps with the contour map for 2003. In addition, individual hydrographs were evaluated to assess temporal changes by region. In recent years, pumping depressions have developed southeast of Sonoma and southwest of El Verano. Water-chemistry data for samples collected from 75 wells during 2002-04 indicate that the ground-water quality in the study area generally is acceptable for potable use. The water from some wells, however, contains one or more constituents in excess of the recommended standards for drinking water. The chemical composition of water from creeks, springs, and wells sampled for major ions plot within three groups on a trilinear diagram: mixed-bicarbonate, sodium-mixed anion, and sodium-bicarbonate. An area of saline ground water in the southern part of the Sonoma Valley appears to have shifted since the late 1940s and early 1950s, expanding in one area, but receding in another. Sparse temperature data from wells southwest of the known occurrence of thermal water suggest that thermal water may be present beneath a larger part of the valley than previously thought. Thermal water contains higher concentrations of dissolved minerals than nonthermal waters because mineral solubilities generally increase with temperature. Geohydrologic Characterization, Water-Chemistry, and Ground-Water Flow Simulation Model of the Sonoma Valley Area, Sonoma County, California Oxygen-18 (d18 O) and deuterium (dD) values for water from most wells plot along the global meteoric water line, indicating that recharge primarily is derived from the direct infiltration of precipitation or the infiltration of seepage from creeks. Samples from shallow- and intermediate-depth wells located near Sonoma Creek and (or) in the vicinity of Shellville plot to the right of the global meteoric water line, indicating that these waters are partly evaporated. The d18 O and dD composition of water from sampled wells indicates that water from wells deeper than 200 feet is isotopically lighter (more negative) than water from wells less than 200 feet deep, possibly indicating that older ground wate

Farrar, Christopher D.; Metzger, Loren F.; Nishikawa, Tracy; Koczot, Kathryn M.; Reichard, Eric G.; Langenheim, Victoria E.

2006-01-01

329

Physical, chemical, and isotopic data for samples from the Anderson Springs area, Lake County, California, 1998-1999  

USGS Publications Warehouse

Anderson Springs is located about 90 miles (145 kilometers) north of San Francisco, California, in the southwestern part of Lake County. The area was first developed in the late 1800s as a health resort, which was active until the 1930s. In the rugged hills to the south of the resort were four small mercury mines of the eastern Mayacmas quicksilver district. About 1,260 flasks of mercury were produced from these mines between 1909 and 1943. In the 1970s, the high-elevation areas surrounding Anderson Springs became part of The Geysers geothermal field. Today, several electric powerplants are located on the ridges above Anderson Springs, utilizing steam produced from a 240°C vapor-dominated reservoir. The primary purpose of this report is to provide physical, chemical, and isotopic data on samples collected in the Anderson Springs area during 1998 and 1999, in response to a Freedom of Information Act request. In July 1998, drainage from the Schwartz adit of the abandoned Anderson mercury mine increased substantially over a 2-day period, transporting a slurry of water and precipitates down a tributary and into Anderson Creek. In August 1998, J.J. Rytuba and coworkers sampled the Schwartz adit drainage and water from the Anderson Springs Hot Spring for base metal and methylmercury analysis. They measured a maximum temperature (Tm) of 85°C in the Hot Spring. Published records show that the temperature of the Anderson Springs Hot Spring (main spring) was 63°C in 1889, 42–52°C from 1974 through 1991, and 77°C in March 1995. To investigate possible changes in thermal spring activity and to collect additional samples for geochemical analysis, C.J. Janik and coworkers returned to the area in September and December 1998. They determined that a cluster of springs adjacent to the main spring had Tm=98°C, and they observed that a new area of boiling vents and small fumaroles (Tm=99.3°C) had formed in an adjacent gully about 20 meters to the north of the main spring. During August–October 1999, several field trips were conducted in the vicinity of Anderson Springs to continue monitoring and sampling the thermal manifestations. The new fumarolic area had increased in temperature and in discharge intensity since 1998, and a zone of dead trees had developed on the steep bank directly west of the fumaroles. Ground temperatures and diffuse flow of CO2 flow through soils were measured in the area surrounding the main spring and new fumaroles and in the zone of tree-kill.

Janik, C.J.; Goff, F.; Sorey, M.L.; Rytuba, J.J.; Counce, D.; Colvard, E.M.; Huebner, M.; White, L.D.; Foster, A.

1999-01-01

330

Map showing locations of damaging landslides in Sonoma County, California, resulting from 1997-98 El Nino rainstorms  

USGS Publications Warehouse

Heavy rainfall associated with a strong El Nino caused over $150 million in landslide damage in the 10-county San Francisco Bay region during the winter and spring of 1998. A team of USGS scientists collected information on landslide locations and damage costs. About $21 million in damages were assessed in Sonoma County.

Ramsey, David W.; Godt, Jonathan W.

1999-01-01

331

EPIDEMIOLOGICAL STUDY OF THE INCIDENCE OF CANCER AS RELATED TO INDUSTRIAL EMISSIONS IN CONTRA COSTA COUNTY, CALIFORNIA  

EPA Science Inventory

The purpose of this study was to examine the relationship of lung cancer incidence in Contra Costa County to ambient levels of air pollution. It was suspected that the presence of heavy industry in the county, mainly petrochemical plants and oil refineries, could be a contributin...

332

Timber resource statistics for the north coast resource area of California, 1994. Forest Service resource bulletin  

SciTech Connect

This report is a summary of timber resource statistics for the North Coast Resource Area of California, which includes Del Norte, Humboldt, Mendocino, and Sonoma Counties. Data were collected by the Pacific Northwest Research Station as part of a State wide multiresource inventory. The inventory sampled private and public lands except reserved areas and National Forests. The National Forest System provided data from regional inventories of North Coast National Forests. Area information for parks and other reserves was obtained directly from the organizations managing these areas. Statistical tables summarize all ownerships and provide estimates of land area, timber volume, growth, mortality, and harvest. Estimates of periodic change of volume and area on timber land are presented for all ownerships outside National Forests.

Waddell, K.L.; Bassett, P.M.

1996-09-01

333

Epizootiological features of avian cholera on the north coast of California.  

PubMed

An avian cholera (Pasteurella multocida) epizootic was observed among wildfowl at the Centerville Gun Club, Humboldt County, California (USA) in January 1978. Compared to their live populations and use of the area, coots (Fulica americana) died in proportionately greater numbers than any other species. Coots collected by gunshot were evaluated for sex and age composition, and morphometry from November 1977 through mid-January 1978 at this site. There was no substantial difference in the sex, age or morphometry between birds dying of avian cholera and from those dying from gunshot. Assuming coots dying of gunshot are representative of the general population, it appears there was little selection among coots by P. multocida. There was evidence for a sequential mortality similar to that reported previously at this site: coots were the first birds to die, followed by American wigeon (Anas americana) and northern pintails (A. acuta acuta); northern shovelers (A. clypeata) and mallards (A. platyrhynchos) died late in the epizootic. PMID:2716104

Mensik, J G; Botzler, R G

1989-04-01

334

Use of USGS earth-science products by county planning agencies in the San Francisco Bay region, California  

USGS Publications Warehouse

An inventory of the use of USGS products in selected planning studies, plans, ordinances, and other planning activities was made for eight counties in the San Francisco Bay region--a region of almost five million people. This inventory was designed to determine and document the use of the 87 earth-science information products prepared as a part of the San Francisco Bay Region Environment and Resources Planning Study (SFBRS). The inventory showed that: (1) all eight counties had planning staffs who were very familiar with SFBRS products and had made frequent use of such products; (2) all eight counties had prepared planning documents which cite SFBRS products; (3) the types of planning applications most often indicated were: geologic hazards studies, seismic safety and public safety plan elements, general reference, and the preparation and review of environmental impact reports and statements; (4) over 90 percent of the 87 SFBRS products were used at least once, and nine of the products were used over 30 times each for various county planning activities; and (5) at least 85 other USGS products were also used for various county planning activities. After the inventory, selected county officials, employees, and consultants were interviewed and asked--among other things--to indicate any problems in the use of the SFBRS products, to suggest improvements, and to identify any needed or desired earth-science information. The responses showed that: (1) the scales commonly used for working maps were 1:62,500 or larger and for plan implementation were 1:24,000 or larger; (2) only one county had a geologist on its planning staff, although six others had the benefit of geotechnical services from private consulting firms, county engineering staffs, or the State Division of Mines and Geology; (3) seven of the eight counties expressed some problems in using the products, primarily because of their small scale or lack of detail; (4) all eight counties expected to continue to use the products and expressed a need or desire for additional earth-science, engineering, or other information; (5) all eight counties suggested specific improvements to future products, primarily larger scale or more detail and fewer technical or more interpretive products; and (6) all eight counties received educational, advisory, and review services from USGS personnel. Seventeen selected examples of the application of SFBRS products to various county planning activities are discussed and illustrated. These examples include four planning studies, seven plans, and two ordinances. From the inventory and responses to the interviews, it is concluded that the counties in the Bay region are very familiar with, have made frequent use of, and will continue to use SFBRS products for a wide range of county planning activities. Suggestions to ensure more effective use of earth-science information in the future include: (1) monitoring emerging critical issues and analyzing new state and federal laws and regulations so as to better anticipate and respond to county earth-science information needs; (2) creating a users advisory committee to help identify critical issues and user needs; (3) providing engineering interpretations and land- and water-use capability ratings to make earth-science information more readily usable; (4) giving priority to areas impacted by development so as to husband staff resources; (5) providing earth-science information at the larger scale and greater detail commonly used and needed by counties; (6) releasing earth-science information earlier and according to a formal distribution pattern; and (7) providing educational, advisory, and review services in connection with any earth-science information designed for planners and decisionmakers.

Kockelman, William J.

1976-01-01

335

A data viewer for stream-sediment and surface-water chemistry, geology, and geography of the Humboldt River basin, northern Nevada. Chapter F.  

USGS Publications Warehouse

The data and software utilized in this product permit the user to view and analyze the geographic relationships among chemistry of stream sediments and surface waters, geology, and various cartographic base information such as but not limited to cities, county boundaries, and land ownership. Data for this product were compiled and or produced as part of a mineral and environmental assessment of the Humboldt River basin conducted by the U.S. Geological Survey between 1995 - 2000.

Yager, Douglas B.; Folger, Helen W.; Stillings, Lisa L.

2006-01-01

336

Ground-water resources in the lower Milliken--Sarco--Tulucay Creeks area, southeastern Napa County, California, 2000-2002  

USGS Publications Warehouse

Ground water obtained from individual private wells is the sole source of water for about 4,800 residents living in the lower Milliken-Sarco-Tulucay Creeks area of southeastern Napa County. Increases in population and in irrigated vineyards during the past few decades have increased water demand. Estimated ground-water pumpage in 2000 was 5,350 acre-feet per year, an increase of about 80 percent since 1975. Water for agricultural irrigation is the dominant use, accounting for about 45 percent of the total. This increase in ground-water extraction has resulted in the general decline of ground-water levels. The purpose of this report is to present selected hydrologic data collected from 1975 to 2002 and to quantify changes in the ground-water system during the past 25 years. The study area lies in one of several prominent northwest-trending structural valleys in the North Coast Ranges. The area is underlain by alluvial deposits and volcanic rocks that exceed 1,000 feet in thickness in some places. Alluvial deposits and tuff beds in the volcanic sequence are the principal source of water to wells. The ground-water system is recharged by precipitation that infiltrates, in minor amounts, directly on the valley floor but mostly by infiltration in the Howell Mountains. Ground water moves laterally from the Howell Mountains into the study area. Although the area receives abundant winter precipitation in most years, nearly half of the precipitation is lost as surface runoff to the Napa River. Evapotranspiration also is high, accounting for nearly one-half of the total precipitation received. Because of the uncertainties in the estimates of precipitation, runoff, and evapotranspiration, a precise estimate of potential ground-water recharge cannot be made. Large changes in ground-water levels occurred between 1975 and 2001. In much of the western part of the area, water levels increased; but in the central and eastern parts, water levels declined by 25 to 125 feet. Ground-water extraction produced three large pumping depressions in the northern and east-central parts of the area. The general decline in ground-water levels is a result of increases in ground-water pumpage and possibly changes in infiltration capacity caused by changes in land use. Ground-water-level declines during 1960-2002 are evident in the records for 9 of 10 key monitoring wells. In five of these wells, water levels dropped by greater than 20 feet since the 1980s. The largest water-level declines have occurred since the mid 1970s, corresponding with a period of accelerated well construction and ground-water extraction. Analysis of samples from 15 wells indicates that the chemical quality of ground water in the study generally is acceptable. However, arsenic concentrations in samples from five wells exceed the U.S. Environmental Protection Agency primary drinking-water standard of 10 micrograms per liter, and iron concentrations in samples from five wells exceed the U.S. Environmental Protection Agency and the California Department of Health Services secondary drinking-water standard of 300 micrograms per liter. Water from 12 of 15 wells sampled contained concentrations of manganese that exceed the U.S. Environmental Protection Agency and the California Department of Health Services secondary drinking-water standard of 50 micrograms per liter. Two wells produced water that had boron in excess of the California Department of Health Services action level of 1 milligram per liter. Stable isotope, chlorofluorocarbon, and tritium data indicate that ground water in the area is a mixture of waters that recharged the aquifer system at different times. The presence of chlorofluorocarbons and tritium in water from the study area is evidence that modern recharge (post 1950) does take place. Water-temperature logs indicate that ground-water temperatures throughout the study area exceed 30?C at depths in excess of 600 feet. Further, water at

Farrar, Christopher D.; Metzger, Loren F.

2003-01-01

337

Analysis of methods to determine storage capacity of, and sedimentation in, Loch Lomond Reservoir, Santa Cruz County, California, 2009  

USGS Publications Warehouse

In 2009, the U.S. Geological Survey, in cooperation with the City of Santa Cruz, conducted bathymetric and topographic surveys to determine the water storage capacity of, and the loss of capacity owing to sedimentation in, Loch Lomond Reservoir in Santa Cruz County, California. The topographic survey was done as a supplement to the bathymetric survey to obtain information about temporal changes in the upper reach of the reservoir where the water is shallow or the reservoir may be dry, as well as to obtain information about shoreline changes throughout the reservoir. Results of a combined bathymetric and topographic survey using a new, state-of-the-art method with advanced instrument technology indicate that the maximum storage capacity of the reservoir at the spillway altitude of 577.5 feet (National Geodetic Vertical Datum of 1929) was 8,646 ±85 acre-feet in March 2009, with a confidence level of 99 percent. This new method is a combination of bathymetric scanning using multibeam-sidescan sonar, and topographic surveying using laser scanning (LiDAR), which produced a 1.64-foot-resolution grid with altitudes to 0.3-foot resolution and an estimate of total water storage capacity at a 99-percent confidence level. Because the volume of sedimentation in a reservoir is considered equal to the decrease in water-storage capacity, sedimentation in Loch Lomond Reservoir was determined by estimating the change in storage capacity by comparing the reservoir bed surface defined in the March 2009 survey with a revision of the reservoir bed surface determined in a previous investigation in November 1998. This revised reservoir-bed surface was defined by combining altitude data from the 1998 survey with new data collected during the current (2009) investigation to fill gaps in the 1998 data. Limitations that determine the accuracy of estimates of changes in the volume of sedimentation from that estimated in each of the four previous investigations (1960, 1971, 1982, and 1998) are a result of the limitations of the survey equipment and data-processing methods used. Previously used and new methods were compared to determine the recent (1998-2009) change in storage capacity and the most accurate and cost-effective means to define the reservoir bed surface so that results can be easily replicated in future surveys. Results of this investigation indicate that the advanced method used in the 2009 survey accurately captures the features of the wetted reservoir surface as well as features along the shoreline that affect the storage capacity calculations. Because the bathymetric and topographic data are referenced to a datum, the results can be easily replicated or compared with future results. Comparison of the 2009 reservoir-bed surface with the surface defined in 1998 indicates that sedimentation is occurring throughout the reservoir. About 320 acre-feet of sedimentation has occurred since 1998, as determined by comparing the revised 1998 reservoir-bed surface, with an associated maximum reservoir storage capacity of 8,965 acre-feet, to the 2009 reservoir bed surface, with an associated maximum capacity of 8,646 acre-feet. This sedimentation is more than 3 percent of the total storage capacity that was calculated on the basis of the results of the 1998 bathymetric investigation.

McPherson, Kelly R.; Freeman, Lawrence A.; Flint, Lorraine E.

2011-01-01

338

Violence and Intimidation: Rising Bigotry toward Arabs and Muslims. Report on a Public Hearing by the Los Angeles County Commission on Human Relations (Los Angeles, California, March 14, 1991).  

ERIC Educational Resources Information Center

Responding to a rise in hate crimes directed toward persons of Arab descent and Muslims before and during the Gulf War, the Los Angeles County (California) Commission on Human Relations held a hearing. The commission heard presentations by representatives of the Arab and Muslim communities, law enforcement, schools, and social science, and…

Chan, Carole

339

Biostratigraphic and lithologic correlations of two Sonoma County Water Agency pilot wells with the type Wilson Grove Formation, Sonoma County, central California  

USGS Publications Warehouse

Small mollusk faunas characteristic of the uppermost part of the Wilson Grove Formation at Wilson Grove and along River Road at Trenton (Pliocene) were encountered in Sonoma County Water Agency pilot wells at Occidental Road well field between 320-500 ft (98-152 m), depth, and in the Sebastopol Road pilot well field between 560-570 ft (171-174 m), depth. These mollusks support correlations between the two wells made on lithologic grounds. A benthic foraminifer was recovered from between 380-390 ft (116-119 m), depth, in the Sonoma County Water Agency Occidental Road pilot well. Though an isolated specimen, the presence of this well-preserved foraminifer supports the environmental interpretation of less than 100 m on the continental shelf indicated by the molluscan assemblages at this site. For this marine stratigraphic interval of the Wilson Grove Formation, we suggest a relatively narrow age range of 5.3 (Miocene-Pliocene boundary) to ~ 4.5 Ma based on the stratigraphic relations of correlative marine strata around the upland margin of Santa Rosa plain and correlative strata in the Santa Cruz area, although an age between 5.3 and ~ 2.8 Ma cannot be discounted.

Powell, Charles L.; McLaughlin, Robert J.; Wan, Elmira

2006-01-01

340

Analytical data for waters of the Harvard Open Pit, Jamestown Mine, Tuolumne County, California, March 1998-September 1999  

USGS Publications Warehouse

The Jamestown mine is located in the Jamestown mining district in western Tuolumne County, California (see Fig. 1). This district is one of many located on or near the Melones fault zone, a major regional suture in the Sierra Nevada foothills. The districts along the Melones fault comprise the Mother Lode gold belt (Clark, 1970). The Harvard pit is the largest of several open pits mined at the Jamestown site by Sonora Mining Corporation between 1986 and 1994 (Fig. 2; Algood, 1990). It is at the site of an historical mine named the Harvard that produced about 100,000 troy ounces of gold, mainly between 1906 and 1916 (Julihn and Horton, 1940). Sonora Mining mined and processed about 17,000,000 short tons of ore, with an overall stripping ratio of about 4.5:1, yielding about 660,000 troy ounces of gold (Nelson and Leicht, 1994). Most of this material came from the Harvard pit, which attained dimensions of about 2700 ft (830 m) in length, 1500 ft (460 m) in width, and 600 ft (185 m) in depth. The bottom of the pit is at an elevation of 870 ft (265 m). Since mining operations ceased in mid-1994, the open pit has been filling with water. As of November, 2000, lake level had reached an elevation of about 1170 ft (357 m). Water quality monitoring data gathered after mine closure showed rising levels of arsenic, sulfate, and other components in the lake, with particularly notable increases accompanying a period of rapid filling in 1995 (County of Tuolumne, 1998). The largest potential source for arsenic in the vicinity of the Harvard pit is arsenian pyrite, the most abundant sulfide mineral related to gold mineralization. A previous study of weathering of arsenian pyrite in similarly mineralized rocks at the Clio mine, in the nearby Jacksonville mining district, showed that arsenic released by weathering of arsenian pyrite is effectively attenuated by adsorption on goethite or coprecipitation with jarosite, depending upon the buffering capacity of the pyrite-bearing rock (Savage and others, 2000). Although jarosite would be expected to dissolve in water having the composition of the developing pit lake, iron oxyhydroxide species (ferrihydrite and goethite) would be stable, and strong partitioning of arsenic onto suspended particles or bottom sediments containing these iron phases would be expected. Arsenic release to the lake would not be expected until stratification develops, producing a reducing, non-circulating hypolimnion in which the iron phases would be destroyed by dissolution. The fact that arsenic concentrations increased rapidly before the pit lake was deep enough to stratify shows that arsenic may not be attenuated in the ways that the earlier Clio mine area study indicated, and suggested that our understanding of release and transport of arsenic in this environment is incomplete. Therefore, in 1997 we decided to study the chemical evolution of the Harvard pit lake as part of a project on environmental impacts of gold mining in the Sierra Nevada, and in early 1998 we developed a cooperative study with several of the investigators in the Stanford University Department of Geological and Environmental Sciences who had done the Clio study. The U.S. Geological Survey portion of the project has been funded by the Mineral Resources Program. It is anticipated that a better understanding of the release and transport of arsenic into the Harvard pit lake and its accumulation there will contribute to more accurate predictions of arsenic release from weathering of sulfide-bearing rocks exposed by mining or other activities or events, and to better forecasts of pit lake evolution in this and similar environments, leading to more effective monitoring and mitigation strategies. An accurate predictive model is needed for the Harvard pit lake to forecast trends in metal concentrations, particularly arsenic, and also concentrations of major cations and anions. As the lake approaches pre-mining groundwater levels the lake water could move down the hydrologic gradient to the southeast into domestic wells, and could also affect the surface

Ashley, R.P.; Savage, K.S.

2001-01-01

341

2. WILLITS SIGN. GATEWAY TO THE REDWOODS. WILLITS, MENDOCINO COUNTY, ...  

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

2. WILLITS SIGN. GATEWAY TO THE REDWOODS. WILLITS, MENDOCINO COUNTY, CALIFORNIA. LOOKING NW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

342

67. WILLITS SIGN. GATEWAY TO THE REDWOODS. WILLITS, MENDOCINO COUNTY, ...  

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

67. WILLITS SIGN. GATEWAY TO THE REDWOODS. WILLITS, MENDOCINO COUNTY, CALIFORNIA. LOOKING NW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

343

70 FR 60489 - Humboldt-Toiyabe National Forest, Mountain City Ranger District, Mountain City Ranger District...  

Federal Register 2010, 2011, 2012, 2013, 2014

...DEPARTMENT OF AGRICULTURE Forest Service Humboldt-Toiyabe National Forest, Mountain City Ranger District...the Humboldt River Basin; Heritage resources...Federal Register. The Forest Service believes...dismissed by the courts [City of Angoon v....

2005-10-18

344

Cancer incidence and community exposure to air emissions from petroleum and chemical plants in Contra Costa County, California: A critical epidemiological assessment  

SciTech Connect

The northern part of Contra Costa County, California is heavily industrialized with a number of petroleum refineries, chemical facilities and other small industrial plants. Several epidemiological studies have been conducted in the country to assess cancer risk in relation to estimated air pollution levels. In this paper, the air monitoring data, air pollution modeling and the epidemiologic studies are critically reviewed. The association between cancer risk and estimated emissions is critically evaluated. The role of occupational and lifestyle (such as cigarette smoking and diet) confounding exposures is also assessed. The importance of validating exposure data generated by air pollution models in epidemiologic studies is emphasized. Pollutants of major concern are sulfur dioxide, nitrogen oxides, and hydrocarbons.

Otto Wong (Applied Health Sciences, San Mateo, CA (United States)); Bailey, W.J.

1993-12-01

345

Distribution of dens used by radiocollared San Joaquin kit fox on Naval Petroleum Reserve No. 1, Kern County, California, 1980-1987  

SciTech Connect

Locations of 945 dens used by radiocollared San Joaquin kit foxes (Vulpes macrotis mutica) on or adjacent to the US Department of Energy's Naval Petroleum Reserve No. 1 (NPR-1) in western Kern County, California between 1980-1987 were recorded on maps and stored within a computer-compatible data base. Most (516 of 887) typical subterranean dens of this endangered species were found in undeveloped portions of 65 sections, but most (41 of 58) atypical dens (dens in man-made structures) were found in developed portions of 26 sections. Program managers can plan construction, maintenance, and operational activities on NPR-1 in ways that avoid potential conflicts with the conservation of kit fox dens by using the section maps provided in this report or by accessing the computerized data base through the Endangered Species Contractor, EG and G Energy Measurements, Inc. 20 refs., 3 figs, 1 tab.

O'Farrell, T.P.; Tabor, S.P.; Kato, T.T.

1987-09-01

346

Survey of potential habitat for the endangered San Joaquin kit fox (Vulpes macrotis mutica) in the Carrizo Plain, San Luis Obispo County, California. [Vulpes macrotis mutica  

SciTech Connect

A field study was conducted for the US Fish and Wildlife Service to determine the presence and distribution of the endangered San Joaquin kit fox (Vulpes macrotis mutica), and to map land use patterns on the Carrizo Plain, eastern San Luis Obispo County, California. The survey was conducted in July 1985 and covered approximately 8140 acres in 20 sections of land. A total of 41 kit fox dens were found. The highest number of kit fox dens observed per 1000 acres was 12; the lowest was 1.5. Approximately 29,720 acres (49%) were grazed by cattle and sheep, 25,600 acres (42%) were cultivated for dry-land farming, but land use was not determined for 5560 acres (9%).

Kato, T.T.

1986-10-01

347

Swath Bathymetry Surveys of the Monterey Bay Area from Point Ano Nuevo to Moss Landing, San Mateo, Santa Cruz, and Monterey Counties, California  

USGS Publications Warehouse

This report describes swath bathymetry and backscatter data acquired by the U.S. Geological Survey on the continental shelf within the Monterey Bay National Marine Sanctuary between Point A?o Nuevo and Moss Landing, in San Mateo, Santa Cruz, and Monterey Counties, Calif. The survey was done for the California Seafloor Mapping Program (CSMP), in field activities S-7-09-MB and S-10-09-MB, by the Western Coastal and Marine Geology (WCMG) Team of the U.S. Geological Survey (USGS). The data were aquired in two seperate surveys: (1) between August 13, 2009 and September 3, 2009, personnel from WCMG completed field activity S-7-09-MB, from Point A?o Nuevo south to Table Rock, as well as a block west of Soquel Canyon; (2) between October 12 and December 16, 2009, WCMG conducted field activity S-10-09-MB, surveying between Table Rock and Moss Landing.

Ritchie, Andrew C.; Finlayson, David P.; Logan, Joshua B.

2010-01-01

348

Joint environmental assessment for Chevron USA, Inc. and Santa Fe Energy Resources, Inc.: Midway Valley 3D seismic project, Kern County, California  

SciTech Connect

The proposed Midway Valley 3D Geophysical Exploration Project covers approximately 31,444 aces of private lands, 6,880 acres of Department of Energy (DOE) Lands within Naval Petroleum Reserve 2 (NPR2) and 3,840 acres of lands administered by the Bureau of Land Management (BLM), in western Kern County, California. This environmental assessment (EA) presents an overview of the affected environment within the project area using results of a literature review of biological field surveys previously conducted within or adjacent to a proposed 3D seismic project. The purpose is to provide background information to identify potential and known locations of sensitive wildlife and special status plant species within the proposed seismic project area. Biological field surveys, following agency approved survey protocols, will be conducted during October through November 1996 to acquire current resources data to provide avoidance as the project is being implemented in the field.

NONE

1996-10-01

349

Map showing recent (1997-98 El Nino) and historical landslides, Crow Creek and vicinity, Alameda and Contra Costa Counties, California  

USGS Publications Warehouse

This report documents the spatial distribution of 3,800 landslides caused by 1997-98 El Ni?o winter rainfall in the vicinity of Crow Creek in Alameda and Contra Costa Counties, California. The report also documents 558 historical (pre-1997-98) landslides. Landslides were mapped from 1:12,000-scale aerial photographs and classified as either debris flows or slides. Slides include rotational and translational slides, earth flows, and complex slope movements. Debris flows and slides from the 1997-98 winter modified 1 percent of the surface of the 148.6 km2 study area. Debris flows were scattered throughout the area, regardless of the type of underlying bedrock geology. Slides, however, were concentrated in a soft sandstone, conglomerate, and clayey group of rock units. Digital map files accompany the report.

Coe, Jeffrey A.; Godt, Jonathan; Tachker, Pierre

2004-01-01

350

Geologic map of the west half of the Blythe 30' by 60' quadrangle, Riverside County, California and La Paz County, Arizona  

USGS Publications Warehouse

The Blythe 30' by 60' quadrangle is located along the Colorado River between southeastern California and western Arizona. This map depicts the geology of the west half of the Blythe quadrangle, which is mostly in California. The map area is a desert terrain consisting of mountain ranges surrounded by extensive alluvial fans and plains, including the flood plain of the Colorado River which covers the easternmost part of the area. Mountainous parts of the area, including the Big Maria, Little Maria, Riverside, McCoy, and Mule Mountains, consist of structurally complex rocks that range in age from Proterozoic to Miocene. Proterozoic gneiss and granite are overlain by Paleozoic to Early Jurassic metasedimentary rocks (mostly marble, quartzite, and schist) that are lithostratigraphically similar to coeval formations of the Colorado Plateau region to the east. The Paleozoic to Jurassic strata were deposited on the tectonically stable North American craton. These rocks are overlain by metamorphosed Jurassic volcanic rocks and are intruded by Jurassic plutonic rocks that represent part of a regionally extensive, northwest-trending magmatic arc. The overlying McCoy Mountains Formation, a very thick sequence of weakly metamorphosed sandstone and conglomerate of Jurassic(?) and Cretaceous age, accumulated in a rapidly subsiding depositional basin south of an east-trending belt of deformation and east of the north-trending Cretaceous Cordilleran magmatic arc. The McCoy Mountains Formation and older rocks were deformed, metamorphosed, and locally intruded by plutonic rocks in the Late Cretaceous. In Oligocene(?) to Miocene time, sedimentary and minor volcanic deposits accumulated locally, and the area was deformed by faulting. Tertiary rocks and their Proterozoic basement in the Riverside and northeastern Big Maria Mountains are in the upper plate of a low-angle normal (detachment) fault that lies within a region of major Early to Middle Miocene crustal extension. Surficial deposits of the flanking alluvial fans and plains range in age from late Miocene to Holocene. Among the oldest of these deposits are limestone and fine-grained clastic sediments of the late Miocene and (or) Pliocene Bouse Formation, which is commonly interpreted to represent an estuary or marine embayment connected to the proto-Gulf of California. Most of the surficial deposits younger than the Bouse Formation are composed of alluvium either derived from local mountain ranges or transported into the area by the Colorado River. Large parts of the area, particularly near the northern margin, are covered by eolian sand, and small parts are covered by playa sediments.

Stone, Paul

2006-01-01

351

Exploring the Americas in a Humboldt Digital Library: Problems and Solutions  

E-print Network

and mineral resources west of the recently acquired Louisiana region (present-day Texas) (Baron 2004). Stephen Jay Gould wrote: “[In the 1850s] Alexander von Humboldt may well have been the world’s most famous and influential intellectual” (Gould 2003, 93...: Bibliographie der selbständig erschienenen Werke. Berlin: Akademie Verlag. Gould, S. 2003. I Have Landed: The End and Beginning in Natural History. New York: Three Rivers Press. Helfreich, G. 2004. Humboldt’s Cosmos: Alexander von Humboldt...

Baron, Frank; Doherr, Detlev

2006-07-01

352

From Alexander von Humboldt to Frederic Edwin Church: Voyages of Scientific Exploration and Creativity  

E-print Network

.......................................................................................................13 „From Humboldt to F. E. Church“ (F. Baron) 2HiN VI, 10 (2005) Humboldt im Netz From Alexander von Humboldt to Frederic Edwin Church: Voyages of Scientific Exploration and Creativity Frank Baron Abstract Stephen Jay Gould wrote recently that „when.... Zusammenfassung Der amerikanische Wissenschaftshistoriker Stephen Jay Gould stellte fest, daß Alexander von Humboldt um die Mitte des neunzehnten Jahrhunderts vielleicht der berühmteste und einflußreichste Intellektuelle gewesen sei. Zu diesem Zeitpunkt bietet...

Baron, Frank

2005-01-01

353

Serologic survey for disease in endangered San Joaquin kit fox, Vulpes macrotis mutica, inhabiting the Elk Hills Naval Petroleum Reserve, Kern County, California  

SciTech Connect

Serum from endangered San Joaquin kit foxes, Vulpes macrotis mutica, and sympatric wildlife inhabiting the Elk Hills Petroleum Reserve, Kern County, and Elkhorn Plain, San Luis Obispo County, California, was collected in 1981 to 1982 and 1984, and tested for antibodies against 10 infectious disease pathogens. Proportions of kit fox sera containing antibodies against diseases were: canine parvovirus, 100% in 1981 to 1982 and 67% in 1984; infectious canine hepatitis, 6% in 1981 to 1982 and 21% in 1984; canine distemper, 0 in 1981 to 1982 and 14% in 1984; tularemia, 8% in 1981 to 1982 and 31% in 1984; Brucella abortus, 8% in 1981 to 1982 and 3% in 1984; Brucella canis, 14% in 1981 to 1982 and 0 in 1984; toxoplasmosis, 6% in 1981 to 1982; coccidioidomycosis, 3% in 1981 to 1982; and plague and leptospirosis, 0 in 1981 to 1982. High population density, overlapping home ranges, ability to disperse great distances, and infestation by ectoparasites were cited as possible factors in the transmission and maintenance of these diseases in kit fox populations.

McCue, P.M.; O'Farrell, T.P.

1986-07-01

354

Promising practices for delivery of court-supervised substance abuse treatment: Perspectives from six high-performing California counties operating Proposition 36  

PubMed Central

Operative for nearly a decade, California's voter-initiated Proposition 36 program offers many offenders community-based substance abuse treatment in lieu of likely incarceration. Research has documented program successes and plans for replication have proliferated, yet very little is known about how the Proposition 36 program works or practices for achieving optimal program outcomes. In this article, we identify policies and practices that key stakeholders perceive to be most responsible for the successful delivery of court-supervised substance abuse treatment to offenders under Proposition 36. Data was collected via focus groups conducted with 59 county stakeholders in six high-performing counties during 2009. Discussion was informed by seven empirical indicators of program performance and outcomes and was focused on identifying and describing elements contributing to success. Program success was primarily attributed to four strategies, those that: (1) fostered program engagement, monitored participant progress, and sustained cooperation among participants; (2) cultivated buy-in among key stakeholders; (3) capitalized on the role of the court and the judge; and (4) created a setting which promoted a high-quality treatment system, utilization of existing resources, and broad financial and political support for the program. Goals and practices for implementing each strategy are discussed. Findings provide a “promising practices” resource for Proposition 36 program evaluation and improvement and inform the design and study of other similar types of collaborative justice treatment efforts. PMID:20965568

Evans, Elizabeth; Anglin, M. Douglas; Urada, Darren; Yang, Joy

2010-01-01

355

ALDER ESTABLISHMENT AND CHANNEL DYNAMICS IN A TRIBUTARY OF THE SOUTH FORK EEL RIVER, MENDOCINO COUNTY, CALIFORNIA1  

E-print Network

ALDER ESTABLISHMENT AND CHANNEL DYNAMICS IN A TRIBUTARY OF THE SOUTH FORK EEL RIVER, MENDOCINO, a tributary of the upper South Fork Eel River, are bounded by two frequencies of periodic flooding. The upper, Williams 1978). On the tributaries of the upper South Fork Eel River, in Mendocino County, Cal- ifornia

Standiford, Richard B.

356

Distribution of dissolved nitrate and fluoride in ground water, Highland-East Highlands, San Bernardino County, California  

USGS Publications Warehouse

In the Highland-East Highlands area of southern California, concentrations of nitrate in water from many wells exceed the U.S. Environmental Protection Agency 's and the California Department of Health 's recommended limit for public water supplies. The nitrate standards for public water supplies in the study area are commonly met by blending the high-nitrate water with low-nitrate water before distribution; however, some of the low-nitrate water sources have fluoride concentrations that exceed the optimum level, or in a few cases exceed the maximum level recommended by the California Department of Health. Nitrate-nitrogen concentrations in the study area are generally between 1 and 20 milligrams per liter. In general, nitrate-nitrogen concentrations exceeding 10 milligrams per liter are found in water from wells perforated at depths of less than 500 feet. (Woodard-USGS)

Eccles, Lawrence A.; Klein, John M.

1978-01-01

357

Combining Forces - The Use of Landsat TM Satellite Imagery, Soil Parameter Information, and Multiplex PCR to Detect Coccidioides immitis Growth Sites in Kern County, California  

PubMed Central

Coccidioidomycosis is a fungal disease acquired through the inhalation of spores of Coccidioides spp., which afflicts primarily humans and other mammals. It is endemic to areas in the southwestern United States, including the San Joaquin Valley portion of Kern County, California, our region of interest (ROI). Recently, incidence of coccidioidomycosis, also known as valley fever, has increased significantly, and several factors including climate change have been suggested as possible drivers for this observation. Up to date details about the ecological niche of C. immitis have escaped full characterization. In our project, we chose a three-step approach to investigate this niche: 1) We examined Landsat-5-Thematic-Mapper multispectral images of our ROI by using training pixels at a 750 m×750 m section of Sharktooth Hill, a site confirmed to be a C. immitis growth site, to implement a Maximum Likelihood Classification scheme to map out the locations that could be suitable to support the growth of the pathogen; 2) We used the websoilsurvey database of the US Department of Agriculture to obtain soil parameter data; and 3) We investigated soil samples from 23 sites around Bakersfield, California using a multiplex Polymerase Chain Reaction (PCR) based method to detect the pathogen. Our results indicated that a combination of satellite imagery, soil type information, and multiplex PCR are powerful tools to predict and identify growth sites of C. immitis. This approach can be used as a basis for systematic sampling and investigation of soils to detect Coccidioides spp. PMID:25380290

Lauer, Antje; Talamantes, Jorge; Castañón Olivares, Laura Rosío; Medina, Luis Jaime; Baal, Joe Daryl Hugo; Casimiro, Kayla; Shroff, Natasha; Emery, Kirt W.

2014-01-01

358

Biostratigraphy of the San Joaquin Formation in borrow-source area B-17, Kettleman Hills landfill, North Dome, Kettleman Hills, Kings County, California  

USGS Publications Warehouse

The stratigraphic occurrences and interpreted biostratigraphy of invertebrate fossil taxa in the upper San Joaquin Formation and lower-most Tulare Formation encountered at the Chemical Waste Management Kettleman Hills waste disposal facility on the North Dome of the Kettleman Hills, Kings County, California are documented. Significant new findings include (1) a detailed biostratigraphy of the upper San Joaquin Formation; (2) the first fossil occurrence of Modiolus neglectus; (3) distinguishing Ostrea sequens from Myrakeena veatchii (Ostrea vespertina of authors) in the Central Valley of California; (4) differentiating two taxa previously attributed to Pteropurpura festivus; (5) finding a stratigraphic succession between Caesia coalingensis (lower in the section) and Catilon iniquus (higher in the section); and (6) recognizing Pliocene-age fossils from around Santa Barbara. In addition, the presence of the bivalves Anodonta and Gonidea in the San Joaquin Formation, both restricted to fresh water and common in the Tulare Formation, confirm periods of fresh water or very close fresh-water environments during deposition of the San Joaquin Formation.

Powell, Charles L.; Fisk, Lanny H.; Maloney, David F.; Haasl, David M.

2010-01-01

359

Combining forces--the use of Landsat TM satellite imagery, soil parameter information, and multiplex PCR to detect Coccidioides immitis growth sites in Kern County, California.  

PubMed

Coccidioidomycosis is a fungal disease acquired through the inhalation of spores of Coccidioides spp., which afflicts primarily humans and other mammals. It is endemic to areas in the southwestern United States, including the San Joaquin Valley portion of Kern County, California, our region of interest (ROI). Recently, incidence of coccidioidomycosis, also known as valley fever, has increased significantly, and several factors including climate change have been suggested as possible drivers for this observation. Up to date details about the ecological niche of C. immitis have escaped full characterization. In our project, we chose a three-step approach to investigate this niche: 1) We examined Landsat-5-Thematic-Mapper multispectral images of our ROI by using training pixels at a 750 m × 750 m section of Sharktooth Hill, a site confirmed to be a C. immitis growth site, to implement a Maximum Likelihood Classification scheme to map out the locations that could be suitable to support the growth of the pathogen; 2) We used the websoilsurvey database of the US Department of Agriculture to obtain soil parameter data; and 3) We investigated soil samples from 23 sites around Bakersfield, California using a multiplex Polymerase Chain Reaction (PCR) based method to detect the pathogen. Our results indicated that a combination of satellite imagery, soil type information, and multiplex PCR are powerful tools to predict and identify growth sites of C. immitis. This approach can be used as a basis for systematic sampling and investigation of soils to detect Coccidioides spp. PMID:25380290

Lauer, Antje; Talamantes, Jorge; Castañón Olivares, Laura Rosío; Medina, Luis Jaime; Baal, Joe Daryl Hugo; Casimiro, Kayla; Shroff, Natasha; Emery, Kirt W

2014-01-01

360

Natural and experimental arboviral infections in a population of blacktail jackrabbits along the sacramento river in butte county, california (1971-1974).  

PubMed

A serologic survey of the blacktail jackrabbit ( Lepus californicus ) for infections with 10 arboviruses was conducted from 1971 through 1974 along the Sacramento River in Butte County, California. Of 325 animals captured and bled a total of 493 times, 40% were found positive for hemagglutination-inhibiting (HI) antibody to California encephalitis (CE) virus, 34% to western equine encephalomyelitis (WEE) virus, 20% to Buttonwillow virus, 15% to St. Louis encephalitis (SLE) virus and 12% to Main Drain virus. Only 5 and 2% of the animals had HI antibodies to Lokern and Turlock (TUR) viruses, respectively. There was no serologic evidence for infection of animals with Powassan, Modoc and Rio Bravo viruses. Differenles in monthly and yearly activities of some viruses were found by analyses of lata on antibody prevalence rates and immunologic conversions in recaptured animals. Experimental studies revealed that subadult jackrabbits were highly susceptible by subcutaneous inoculation to infection with CE, WEE and SLE viruses but were refractory to infection with TUR virus. All animals infected with CE and WEE viruses developed viremia that persisted for 2 or 3 days after inoculation and then developed antibodies that were detectable from 7 through at least 56 days after infection. In contrast, only 2 of 7 animals that developed HI antibodies to SLE virus had viremia, and at barely detectable levels; and HI antibodies were undetectable in 3 of the 7 animals at 56 days after infection. PMID:24228958

Hardy, J L; Milby, M M; Wright, M E; Beck, A J; Presser, S B; Bruen, J P

1977-10-01

361

California coastal processes study, LANDSAT 2  

NASA Technical Reports Server (NTRS)

The authors have identified the following significant results. By using suspended sediments as tracers, objectives were met by qualitative definition of the nearshore circulation along the entire coast of California with special study sites at Humboldt Bay, the mouth of the Russian River, San Francisco Bay, Monterey Bay, and the Santa Barbara Channel. Although LANDSAT primarily imaged fines and silts in the surface waters, the distribution of sediments allowed an examination of upwelling, convergences and coastal erosion and deposition. In Monterey Bay and Humboldt Bay, these coastal phenomena were used to trace seasonal trends in surface currents.

Pirie, D. M.; Steller, D. D. (principal investigators)

1977-01-01

362

The K-College Project in Sonoma County, California: Developing a University-Public School System Academic Partnership.  

ERIC Educational Resources Information Center

An academic partnership between Cotati-Rohnert Park School District (California) and Sonoma State University was formed to provide continuous instruction from kindergerten to college. The partnership has several objectives, including establishing a management institute for school administrators and linking university and district faculty in…

McLaughlin, Mike

1987-01-01

363

Usage and Recall of the Food Stamp Office Resource Kit (FSORK) by Food Stamp Applicants in 4 California Counties  

ERIC Educational Resources Information Center

Objective: To evaluate recall and usage of the Food Stamp Office Resource Kit (FSORK), a set of nutrition education materials designed for use in food stamp offices. Design: Client intercept exit surveys, an environmental scan, and individual observations of clients in the food stamp office. Setting: Four food stamp offices in California

Ghirardelli, Alyssa; Linares, Amanda; Fong, Amy

2011-01-01

364

Remote Sensing and Spatial Analysis of Watershed and Estuarine Processes for Conservation Planning in Elkhorn Slough, Monterey County, California  

Microsoft Academic Search

The Elkhorn Slough watershed, located on the coast of Monterey Bay in Central California, is a significant Pacific Coast estuarine system. It has become a nexus of remote sensing research due to partnerships with multiple nearby institutions, and innovative approaches in the research area have addressed several management issues in the watershed. Historical ecological research with archival aerial photographs identified

Kristin B. Byrd

365

Strontium Isotopic Composition of Paleozoic Carbonate Rocks in the Nevada Test Site Vicinity, Clark, Lincoln, and Nye Counties, Nevada, and Inyo County, California  

USGS Publications Warehouse

Ground water moving through permeable Paleozoic carbonate rocks represents the most likely pathway for migration of radioactive contaminants from nuclear weapons testing at the Nevada Test Site, Nye County, Nevada. The strontium isotopic composition (87Sr/86Sr) of ground water offers a useful means of testing hydrochemical models of regional flow involving advection and reaction. However, reaction models require knowledge of 87Sr/86Sr data for carbonate rock in the Nevada Test Site vicinity, which is scarce. To fill this data gap, samples of core or cuttings were selected from 22 boreholes at depth intervals from which water samples had been obtained previously around the Nevada Test Site at Yucca Flat, Frenchman Flat, Rainier Mesa, and Mercury Valley. Dilute acid leachates of these samples were analyzed for a suite of major- and trace-element concentrations (MgO, CaO, SiO2, Al2O3, MnO, Rb, Sr, Th, and U) as well as for 87Sr/86Sr. Also presented are unpublished analyses of 114 Paleozoic carbonate samples from outcrops, road cuts, or underground sites in the Funeral Mountains, Bare Mountain, Striped Hills, Specter Range, Spring Mountains, and ranges east of the Nevada Test Site measured in the early 1990's. These data originally were collected to evaluate the potential for economic mineral deposition at the potential high-level radioactive waste repository site at Yucca Mountain and adjacent areas (Peterman and others, 1994). Samples were analyzed for a suite of trace elements (Rb, Sr, Zr, Ba, La, and Ce) in bulk-rock powders, and 87Sr/86Sr in partial digestions of carbonate rock using dilute acid or total digestions of silicate-rich rocks. Pre-Tertiary core samples from two boreholes in the central or western part of the Nevada Test Site also were analyzed. Data are presented in tables and summarized in graphs; however, no attempt is made to interpret results with respect to ground-water flow paths in this report. Present-day 87Sr/86Sr values are compared to values for Paleozoic seawater present at the time of deposition. Many of the samples have 87Sr/86Sr compositions that remain relatively unmodified from expected seawater values. However, rocks underlying the northern Nevada Test Site as well as rocks exposed at Bare Mountain commonly have elevated 87Sr/86Sr values derived from post-depositional addition of radiogenic Sr most likely from fluids circulating through rubidium-rich Paleozoic strata or Precambrian basement rocks.

Paces, James B.; Peterman, Zell E.; Futo, Kiyoto; Oliver, Thomas A.; Marshall, Brian D.

2007-01-01

366

Hydrogeologic setting and hydrologic data of the Smoke Creek Desert basin, Washoe County, Nevada, and Lassen County, California, water years 1988-90  

USGS Publications Warehouse

Smoke Creek Desert is a potential source of water for urban development in Washoe County, Nevada. Hydrogeologic data were collected from 1988 to 1990 to learn more about surface- and ground-water flow in the basin. Impermeable rocks form a boundary to ground-water flow on the east side of the basin and at unknown depths at the base of the flow system. Permeable volcanic rocks on the west and north sides of the basin represent a previously unrecognized aquifer and provide potential avenues for interbasin flow. Geophysical data indicate that basin-fill sediments are about 2,000 feet thick near the center of the basin. The geometry of the aquifers, however, remains largely unknown. Measurements of water levels, pressure head, flow rate, water temperature, and specific conductance at 19 wells show little change from 1988 to 1990. Chemically, ground water begins as a dilute sodium and calcium bicarbonate water in the mountain blocks, changes to a slightly saline sodium bicarbonate solution beneath the alluvial fans, and becomes a briny sodium chloride water near the playa. Concentrations of several inorganic constituents in the briny water near the playa commonly exceed Nevada drinking-water standards. Ground water in the Honey Lake basin and Smoke Creek Desert basin has similar stable-isotope composition, except near Sand Pass. If interbasin flow takes place, it likely occurs at depths greater than 400-600 feet beneath Sand Pass or through volcanic rocks to the north of Sand Pass. Measure- ments of streamflow indicate that about 2,800 acre-feet/year discharged from volcanic rocks to streamflow and a minimum of 7.300 acre-feet/year infiltrated and recharged unconsolidated sediments near Smoke, Buffalo, and Squaw Creeks during the period of study. Also about 1,500 acre-feet per year was lost to evapotranspiration along the channel of Smoke Creek, and about 1,680 acre-feet per year of runoff from Smoke, Buffalo, and Squaw Creeks was probably lost to evaporation from the playa.

Maurer, D.K.

1993-01-01

367

Water-quality data from Taylor Creek drainage basin, El Dorado County, California, July 1975 through October 1976  

USGS Publications Warehouse

Data were collected from July 1975 through October 1976 to establish benchmark water-quality conditions in the Taylor Creek drainage basin in California. The Taylor Creek drainage basin is a high-altitude system of lakes and streams which forms one of the tributaries to Lake Tahoe in the Sierra Nevada of California and Nevada. Sampling sites were distributed between the upper and lower reaches of the basin. Streamflow and water-quality data were collected at 13 stream sites. Water-quality data and depth profiles were collected at six lake sites. The reconnaissance included measurement and evaluation of the following selected characteristics: major chemicals, nutrients, fecal coliform bacteria, phytoplankton, periphytic algae, benthic macroinvertebrates, primary productivity, and stream community diversity. (USGS)

Templin, William E.; Green, D. Brady; Ferreira, Rodger F.

1980-01-01

368

21. Photocopy of photograph (from California State Library, Sacramento, California, ...  

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

21. Photocopy of photograph (from California State Library, Sacramento, California, c. 1903) EXTERIOR, SOUTH FRONT & WEST SIDE OF MISSION IN RUINOUS STATE BEFORE RESTORATION, C. 1903 - Mission San Francisco Solano de Sonoma, First & Spain Streets, Sonoma, Sonoma County, CA

369

23. Photocopy of photograph (from California State Library, Sacramento, California, ...  

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

23. Photocopy of photograph (from California State Library, Sacramento, California, C. 1909) EXTERIOR, VIEW OF SOUTH FRONT OF CONVENTO IN RUINS, C. 1909 - Mission San Francisco Solano de Sonoma, First & Spain Streets, Sonoma, Sonoma County, CA

370

17. Photocopy of photograph (from California State Library, Sacramento, California, ...  

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

17. Photocopy of photograph (from California State Library, Sacramento, California, c. 1890) EXTERIOR, REAR VIEW OF MISSION, C. 1890 - Mission San Francisco Solano de Sonoma, First & Spain Streets, Sonoma, Sonoma County, CA

371

4. Historic American Buildings Survey California State Library Sacramento, California ...  

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

4. Historic American Buildings Survey California State Library Sacramento, California Photo Taken: 1860 Re-photo: March 1940 EAST FRONT - CENTRAL SECTION - Custom House, Custom House Plaza, Monterey, Monterey County, CA

372

2. Historic American Buildings Survey California State Library Collection California ...  

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

2. Historic American Buildings Survey California State Library Collection California Section Photo of Thompson & West Engraving of 1880 COMBINED FRONTAGE OF THE THREE BUILDINGS - Big Four Building, 220-226 K Street, Sacramento, Sacramento County, CA

373

2001-2002 Wet Season Branchiopod Survey Report, Lawrence Livermore National Laboratory, Site 300, Alameda and San Joaquin Counties, California  

SciTech Connect

Condor County Consulting on behalf of Lawrence Livermore National Laboratory (LLNL) has performed wet season surveys for listed branchiopods at Site 300, located in eastern Alameda County and western San Joaquin County. LLNL is collecting information for the preparation of an EIS covering ongoing explosives testing and related activities on Site 300. Related activities include maintenance of fire roads and annual control burns of approximately 607 hectares (1500 acres). Control burns typically take place on the northern portion of the site. Because natural branchiopod habitat is sparse on Site 300, it is not surprising that listed branchiopods were not observed during this 2001-2002 wet season survey. Although the site is large, a majority of it has topography and geology that precludes the formation of static seasonal pools. Even the relatively gentle topography of the northern half of the site contains few areas where water pools for more than two weeks. The rock outcrops found on the site did not provide suitable habitat for listed branchiopods. Most of the habitat available to branchiopods on the site is puddles that form in roadbeds and dry quickly. The one persistent pool on the site, the larger of the two modified vernal pools and the only one to fill this season, is occupied by two branchiopod species that require long-lived pools to reach maturity. In short, there is little habitat available on the site for branchiopods and most of the habitat present is generally too short-lived to support the branchiopod species that do occur at Site 300.

Weber, W; Woollett, J

2004-11-16

374

Notes from the field: aseptic meningitis outbreak associated with echovirus 30 among high school football players - los angeles county, california, 2014.  

PubMed

On August 4, 2014, the Acute Communicable Disease Control Program of the Los Angeles County Department of Public Health received a report of three aseptic meningitis cases among football players at a county high school. An investigation was conducted to determine the extent of the outbreak, identify potential exposures, and recommend control measures. An outbreak-associated aseptic meningitis case was defined as an illness of any team or family member with onset during July 28-August 11 with 1) cerebrospinal fluid pleocytosis and negative bacterial culture or 2) an emergency department visit with headache, fever, and stiff neck. Ten cases were identified; nine in males, and one in a female; patient ages ranged from 13 to 17 years. All the patients sought care at an emergency department, and five were hospitalized, resulting in 12 total hospital days. All 10 patients have recovered. Eight patients were football players, and two were siblings of football players. The most affected subgroup was the junior varsity football team, with seven cases out of 57 players (attack rate = 12.3%); the relative risk for aseptic meningitis was higher among players who were linemen than among those who were not linemen (relative risk = 5.4 [p = 0.03]). Of the 10 patients, eight tested positive by polymerase chain reaction for enterovirus, and two were not tested. Echovirus testing was performed at the California Viral and Rickettsial Disease Laboratory. Of the eight specimens testing positive for enterovirus, seven tested positive for echovirus 30, and one specimen could not be typed because of insufficient quantity. PMID:25551596

Croker, Curtis; Civen, Rachel; Keough, Kathleen; Ngo, Van; Marutani, Amy; Schwartz, Benjamin

2015-01-01

375

Landslides in Alameda County, California: A Digital Database Extracted from Preliminary Photointerpretation Maps of Surficial Deposits by T.H. Nilsen in USGS Open-File Report 75-277  

USGS Publications Warehouse

All or part of 25 7.5-minute quadrangles identifying 8465 landslides - largely slow-moving slides and earth flows - in Alameda County, California, have been converted to a digital-map database, compiled at 1:24,000 scale and plotted at 1:62,500 scale, that can be acquired from the U.S. Geological Survey over the Internet or on magnetic tape.

Roberts, Sebastian; Roberts, Michelle A.; Brennan, Eileen M.

2000-01-01

376

Map of the Carpinteria area and vicinity, Santa Barbara County, California, showing water-level contours for March 1983, and net change in water level between March 1982 and March 1983  

USGS Publications Warehouse

A water-level contour map of the Carpinteria area, California, was constructed using 34 water-level measurements made by the Carpinteria County Water District in March 1983. Also shown on the map are five hydrographs that show water-level fluctuations in each well between 1978 and 1983. In addition, a water-level net-change map for March 1982 to March 1983 is shown. (USGS)

Moyle, W.R., Jr.

1984-01-01

377

Rates of evapotranspiration, recharge from precipitation beneath selected areas of native vegetation, and streamflow gain and loss in Carson Valley, Douglas County, Nevada, and Alpine County, California  

USGS Publications Warehouse

Rapid growth and development in Carson Valley is causing concern over the continued availability of water resources to sustain such growth into the future. A study to address concerns over water resources and to update estimates of water-budget components in Carson Valley was begun in 2003 by the U.S. Geological Survey, in cooperation with Douglas County, Nevada. This report summarizes micrometeorologic, soil-chloride, and streambed-temperature data collected in Carson Valley from April 2003 through November 2004. Using these data, estimates of rates of discharge by evapotranspiration (ET), rates of recharge from precipitation in areas of native vegetation on the eastern and northern sides of the valley, and rates of recharge and discharge from streamflow infiltration and seepage on the valley floor were calculated. These rates can be used to develop updated water budgets for Carson Valley and to evaluate potential effects of land- and water-use changes on the valley's water budget. Data from eight ET stations provided estimates of annual ET during water year 2004, the sixth consecutive year of a drought with average or below average precipitation since 1999. Estimated annual ET from flood-irrigated alfalfa where the water table was from 3 to 6 feet below land surface was 3.1 feet. A similar amount of ET, 3.0 feet, was estimated from flood-irrigated alfalfa where the water table was about 40 feet below land surface. Estimated annual ET from flood-irrigated pasture ranged from 2.8 to 3.2 feet where the water table ranged from 2 to 5 feet below land surface, and was 4.4 feet where the water table was within 2 feet from land surface. Annual ET estimated from nonirrigated pasture was 1.7 feet. Annual ET estimated from native vegetation was 1.9 feet from stands of rabbitbrush and greasewood near the northern end of the valley, and 1.5 feet from stands of native bitterbrush and sagebrush covering alluvial fans along the western side of the valley. Uncertainty in most ET estimates is about 12 percent, but ranged from +30 and +50 percent to -20 and -40 percent for nonirrigated pasture and native bitterbrush and sagebrush. Estimated rates for water year 2004 likely are less than those during years of average, or above average precipitation when the water table would be closer to land surface. Test holes drilled in areas of native vegetation on the northern and eastern sides of Carson Valley had high concentrations of soil chloride at depths ranging from 4 to 18 feet below land surface at six locations on the eastern side of the valley. The high chloride concentrations indicate that modern-day precipitation at the six locations does not percolate deeper than the root zone of native vegetation. Estimates of the time required to accumulate the measured amount of chloride to depths of about 30 feet below land surface at the six test holes ranged from about 3,000 to 12,000 years. Low concentrations of soil chloride in two test holes on the northern end of Carson Valley and in a test hole on the eastern side of Fish Spring Flat indicate that a small amount of recharge from modern-day precipitation is taking place. Estimated annual recharge from precipitation at the two locations was 0.03 and 0.04 foot on the northern end of the valley and 0.02 foot on the eastern side of Fish Spring Flat. Uncertainty in the estimated recharge rates was about ?0.01 foot. Estimates of the time required to accumulate the measured amount of chloride to depths of about 30 feet below land surface at the three test holes ranged from about 100 to 700 years. The two test holes near the northern end of the valley are in gravel and eolian sand deposits and recharge from precipitation may be taking place at similar rates in other areas with gravel and eolian sand deposits. Based on results from other test holes, recharge at the rate estimated for the test hole on the eastern side of Fish Spring Flat is not likely applicable to a large area. Data from 37 site

Maurer, Douglas K.; Berger, David L.; Tumbusch, Mary L.; Johnson, Michael J.

2006-01-01

378

Molecular Modeling and Computational Chemistry at Humboldt State University.  

ERIC Educational Resources Information Center

Describes a molecular modeling and computational chemistry (MM&CC) facility for undergraduate instruction and research at Humboldt State University. This facility complex allows the introduction of MM&CC throughout the chemistry curriculum with tailored experiments in general, organic, and inorganic courses as well as a new molecular modeling…

Paselk, Richard A.; Zoellner, Robert W.

2002-01-01

379

Wilhelm von Humboldt's Idea of "Bildung" and Education.  

ERIC Educational Resources Information Center

The importance of Wilhelm von Humboldt's work in educational philosophy is little known outside of Germany and even there he is more often criticized than praised. This is unfortunate because his contributions to education and other areas had an important impact on other philosophers of his period and are well worth considering today. In his main…

Stubbs, Elsina

380

Geologic map and digital database of the Yucaipa 7.5' quadrangle, San Bernardino and Riverside Counties, California  

USGS Publications Warehouse

This geologic database of the Yucaipa 7.5' quadrangle was prepared by the Southern California Areal Mapping Project (SCAMP), a regional geologic-mapping project sponsored jointly by the U.S. Geological Survey and the California Geological Survey. The database was developed as a contribution to the National Cooperative Geologic Mapping Program's National Geologic Map Database, and is intended to provide a general geologic setting of the Yucaipa quadrangle. The database and map provide information about earth materials and geologic structures, including faults and folds that have developed in the quadrangle due to complexities in the San Andreas Fault system. The Yucaipa 7.5' quadrangle contains materials and structures that provide unique insight into the Mesozoic and Cenozoic geologic evolution of southern California. Stratigraphic and structural elements include: (1) strands of the San Andreas Fault that bound far-traveled terranes of crystalline and sedimentary rock; (2) Mesozoic crystalline rocks that form lower and upper plates of the regionwide Vincent-Orocopia Thrust system; and (3) late Tertiary and Quaternary sedimentary materials and geologic structures that formed during the last million years or so and that record complex geologic interactions within the San Andreas Fault system. These materials and the structures that deform them provide the geologic framework for investigations of geologic hazards and ground-water recharge and subsurface flow. Geologic information contained in the Yucaipa database is general-purpose data that is applicable to land-related investigations in the earth and biological sciences. The term "generalpurpose" means that all geologic-feature classes have minimal information content adequate to characterize their general geologic characteristics and to interpret their general geologic history. However, no single feature class has enough information to definitively characterize its properties and origin. For this reason the database cannot be used for site-specific geologic evaluations, although it can be used to plan and guide investigations at the site-specific level.

Matti, Jonathan C.; Morton, D.M.; Cox, B.F.; Carson, S.E.; Yetter, T.J.; Digital preparation by: Cossette, P.M.; Wright, M.C.; Kennedy, S.A.; Dawson, M.L.; Hauser, R.M.

2003-01-01

381

Joint environmental assessment for western NPR-1 3-dimensional seismic project at Naval Petroleum Reserve No. 1, Kern County, California  

SciTech Connect

The Department of Energy (DOE), in conjunction with the Bureau of Land Management (BLM), has prepared an Environmental Assessment (DOE/EA-1124) to identify and evaluate the potential environmental impacts of the proposed geophysical seismic survey on and adjacent to the Naval Petroleum Reserve No.1 (NPR-1), located approximately 35 miles west of Bakersfield, California. NPR-1 is jointly owned and operated by the federal government and Chevron U.S.A. Production Company. The federal government owns about 78 percent of NPR-1, while Chevron owns the remaining 22 percent. The government`s interest is under the jurisdiction of DOE, which has contracted with Bechtel Petroleum Operations, Inc. (BPOI) for the operation and management of the reserve. The 3-dimensional seismic survey would take place on NPR-1 lands and on public and private lands adjacent to NPR-1. This project would involve lands owned by BLM, California Department of Fish and Game (CDFG), California Energy Commission (CEC), The Nature Conservancy, the Center for Natural Lands Management, oil companies (Chevron, Texaco, and Mobil), and several private individuals. The proposed action is designed to provide seismic data for the analysis of the subsurface geology extant in western NPR-1 with the goal of better defining the commercial limits of a currently producing reservoir (Northwest Stevens) and three prospective hydrocarbon bearing zones: the {open_quotes}A Fan{close_quotes} in Section 7R, the 19R Structure in Section 19R, and the 13Z Structure in Section 13Z. Interpreting the data is expected to provide NPR-1 owners with more accurate locations of structural highs, faults, and pinchouts to maximize the recovery of the available hydrocarbon resources in western NPR-1. Completion of this project is expected to increase NPR-1 recoverable reserves, and reduce the risks and costs associated with further exploration and development in the area.

NONE

1996-05-01

382

Emergency Assessment of Debris-Flow Hazards from Basins Burned by the 2007 Slide and Grass Valley Fires, San Bernardino County, Southern California  

USGS Publications Warehouse

INTRODUCTION The objective of this report is to present a preliminary emergency assessment of the potential for debris-flow generation from basins burned by the Slide and Grass Valley Fires in San Bernardino County, southern California in 2007. Debris flows are among the most hazardous geologic phenomena; debris flows that followed wildfires in southern California in 2003 killed 16 people and caused tens of millions of dollars of property damage. A short period of even moderate rainfall on a burned watershed can lead to debris flows. Rainfall that is normally absorbed into hillslope soils can run off almost instantly after vegetation has been removed by wildfire. This causes much greater and more rapid runoff than is normal from creeks and drainage areas. Highly erodible soils in a burn scar allow flood waters to entrain large amounts of ash, mud, boulders, and unburned vegetation. Within the burned area and downstream, the force of rushing water, soil, and rock can destroy culverts, bridges, roadways, and buildings, potentially causing injury or death. This emergency debris-flow hazard assessment is presented as relative ranking of the predicted median volume of debris flows that can issue from basin outlets in response to 3.50 inches (88.90 mm) of rainfall over a 3-hour period. Such a storm has a 10-year return period. The calculation of debris flow volume is based on a multiple-regression statistical model that describes the median volume of material that can be expected from a recently burned basin as a function of the area burned at high and moderate severity, the basin area with slopes greater than or equal to 30 percent, and triggering storm rainfall. Cannon and others (2007) describe the methods used to generate the hazard maps. Identification of potential debris-flow hazards from burned drainage basins is necessary to issue warnings for specific basins, to make effective mitigation decisions, and to help plan evacuation timing and routes.

Cannon, Susan H.; Gartner, Joseph E.; Michael, John A.; Bauer, Mark A.; Stitt, Susan C.; Knifong, Donna L.; McNamara, Bernard J.; Roque, Yvonne M.

2007-01-01

383

Emergency Assessment of Debris-Flow Hazards from Basins Burned by the 2007 Ranch Fire, Ventura and Los Angeles Counties, Southern California  

USGS Publications Warehouse

INTRODUCTION The objective of this report is to present a preliminary emergency assessment of the potential for debris-flow generation from basins burned by the Ranch Fire in Ventura and Los Angeles Counties, southern California in 2007. Debris flows are among the most hazardous geologic phenomena; debris flows that followed wildfires in southern California in 2003 killed 16 people and caused tens of millions of dollars of property damage. A short period of even moderate rainfall on a burned watershed can lead to debris flows. Rainfall that is normally absorbed into hillslope soils can run off almost instantly after vegetation has been removed by wildfire. This causes much greater and more rapid runoff than is normal from creeks and drainage areas. Highly erodible soils in a burn scar allow flood waters to entrain large amounts of ash, mud, boulders, and unburned vegetation. Within the burned area and downstream, the force of rushing water, soil, and rock can destroy culverts, bridges, roadways, and buildings, potentially causing injury or death. This emergency debris-flow hazard assessment is presented as relative ranking of the predicted median volume of debris flows that can issue from basin outlets in response to 2.25 inches (57.15 mm) of rainfall over a 3-hour period. Such a storm has a 10-year return period. The calculation of debris flow volume is based on a multiple-regression statistical model that describes the median volume of material that can be expected from a recently burned basin as a function of the area burned at high and moderate severity, the basin area with slopes greater than or equal to 30 percent, and triggering storm rainfall. Cannon and others (2007) describe the methods used to generate the hazard maps. Identification of potential debris-flow hazards from burned drainage basins is necessary to issue warnings for specific basins, to make effective mitigation decisions, and to help plan evacuation timing and routes.

Cannon, Susan H.; Gartner, Joseph E.; Michael, John A.; Bauer, Mark A.; Stitt, Susan C.; Knifong, Donna L.; McNamara, Bernard J.; Roque, Yvonne M.

2007-01-01

384

Geochronologic and geochemical data from Mesozoic rocks in the Black Mountain area northeast of Victorville, San Bernardino County, California  

USGS Publications Warehouse

We present geochronologic and geochemical data for Mesozoic rocks in the Black Mountain area northeast of Victorville, California, to supplement previous geologic mapping. These data, together with previously published results, limit the depositional age of the sedimentary Fairview Valley Formation to Early Jurassic, refine the ages and chemical compositions of selected units in the overlying Jurassic Sidewinder Volcanics and of related intrusive units, and limit the age of some post-Sidewinder faulting in the Black Mountain area to a brief interval in the Late Jurassic. The new information contributes to a more complete understanding of the Mesozoic magmatic and tectonic evolution of the western Mojave Desert and surrounding regions.

Stone, Paul; Barth, Andrew P.; Wooden, Joseph L.; Fohey-Breting, Nicole K.; Vazquez, Jorge A.; Priest, Susan S.

2013-01-01

385

A water-resources data-network evaluation for Monterey County, California; Phase 3, Northern Salinas River drainage basin  

USGS Publications Warehouse

This report evaluates existing data collection networks and possible additional data collection to monitor quantity and quality of precipitation, surface water, and groundwater in the northern Salinas River drainage basin, California. Of the 34 precipitation stations identified, 20 were active and are concentrated in the northwestern part of the study area. No precipitation quality networks were identified, but possible data collection efforts include monitoring for acid rain and pesticides. Six of ten stream-gaging stations are active. Two surface water quality sites are sampled for suspended sediment, specific conductance, and chloride; one U.S. Geological Survey NASOAN site and one site operated by California Department of Water Resources make up the four active sampling locations; reactivation of 45 inactive surface water quality sites might help to achieve objectives described in the report. Three local networks measure water levels in 318 wells monthly, during peak irrigation, and at the end of the irrigation season. Water quality conditions are monitored in 379 wells; samples are collected in summer to monitor saltwater intrusion near Castroville and are also collected annually throughout the study area for analysis of chloride, specific conductance, and nitrate. An ideal baseline network would be an evenly spaced grid of index wells with a density of one per section. When baseline conditions are established, representative wells within the network could be monitored periodically according to specific data needs. (USGS)

Templin, W.E.; Schluter, R.C.

1990-01-01

386

Geologic map and digital database of the San Bernardino Wash 7.5 minute quadrangle, Riverside County, California  

USGS Publications Warehouse

The geologic map and digital database of the San Bernardino Wash quadrangle are products of a regional geologic mapping effort undertaken in the eastern Transverse Ranges in and around Joshua Tree National Park. This investigation, part of the Southern California Areal Mapping Project (SCAMP), is conducted in cooperation with the California Geologic Survey and the National Park Service. In line with the goals of the National Cooperative Geologic Mapping Program (NCGMP), mapping of the San Bernardino Wash and other quadrangles has been directed toward generating a multipurpose digital geologic map database that is applicable to land-related investigations in the earth and biological sciences. This mapping is conducted to further understanding of bedrock geology and surficial processes in the region and to document evidence for seismotectonic activity in the eastern Transverse Ranges. It is also intended to serve as a base layer suitable for ecosystem and mineral resource assessment and for building a hydrogeologic framework for Pinto Basin. Initial investigations span Pinto Basin from the Hexie and Eagle Mountains northward into the Pinto Mountains (see fig. 1). Quadrangles mapped include the Conejo Well 7.5-minute quadrangle (Powell, 2001a), the Porcupine Wash 7.5-minute quadrangle (Powell, 2001b), the Pinto Mountain 7.5-minute quadrangle (Powell, 2002), and the San Bernardino Wash 7.5-minute quadrangle. Parts of the San Bernardino Wash quadrangle had been mapped previously at a variety of scales (Weir, and Bader, 1963; Hope, 1966, 1969; Jennings, 1967; Powell, 1981, 1993).

Powell, Robert E.; digital preparation by Cossette, Pamela M.

2002-01-01

387

Geologic map and digital database of the Pinto Mountain 7.5 minute quadrangle, Riverside County, California  

USGS Publications Warehouse

The geologic map and digital database of the Pinto Mountain quadrangle are products of a regional geologic mapping effort undertaken in the eastern Transverse Ranges in and around Joshua Tree National Park. This investigation, part of the Southern California Areal Mapping Project (SCAMP), is conducted in cooperation with the California Geologic Survey and the National Park Service. In line with the goals of the National Cooperative Geologic Mapping Program (NCGMP), mapping of the Pinto Mountain and other quadrangles has been directed toward generating a multipurpose digital geologic map database that is applicable to land-related investigations in the earth and biological sciences. This mapping is conducted to further understanding of bedrock geology and surficial processes in the region and to document evidence for seismotectonic activity in the eastern Transverse Ranges. It is also intended to serve as a base layer suitable for ecosystem and mineral resource assessment and for building a hydrogeologic framework for Pinto Basin. Initial investigations span Pinto Basin from the Hexie and Eagle Mountains northward into the Pinto Mountains. Quadrangles mapped include the Conejo Well 7.5-minute quadrangle (Powell, 2001a), the Porcupine Wash 7.5-minute quadrangle (Powell, 2001b), the Pinto Mountain 7.5-minute quadrangle, and the San Bernardino Wash 7.5-minute quadrangle (Powell, 2002). Parts of the Pinto Mountain quadrangle had been mapped previously at a variety of scales (Weir, and Bader, 1963; Hope, 1966, 1969; Jennings, 1967; Powell, 1981, 1993).

Powell, Robert E.

2002-01-01

388

Development and implementation of exposure assessment procedures for toxic air pollutants in several Los Angeles County, California Communities. Final report  

SciTech Connect

The California Air Resources Board and the U.S. Environmental Protection Agency studied the exposures of 51 residents of Los Angeles, California, to 25 volatile organic chemicals (VOCs) in air and drinking water in 1987. The main objective of the study was to measure personal, indoor and outdoor concentrations, and breath concentrations of VOCs in persons living in households that had previously been measured in 1984. A total of 51 homes were visited in February of 1987, and 43 of these were revisited in July of 1987. The results confirmed previous findings of higher personal and indoor air concentrations than outdoor concentrations of most prevalent chemicals; higher personal, indoor, and outdoor air concentrations in winter than in summer; and (in winter only) higher outdoor concentrations at night than in the daytime. New findings were: (1) room-to-room variability of 12-hour average concentrations was very small, (2) 'whole-house' source emission rates were relatively constant during both seasons, with higher rates for odorous chemicals such as p-dichlorobenzene and limonene than for other classes of chemicals; (3) breath concentrations measure during morning and evening were similar for most participants, (4) limited data indicated that toluene and methylene chloride were prevalent at fairly high concentrations.

Pellizzari, E.D.; Michael, L.C.; Perritt, K.; Smith, D.J.; Hartwell, T.D.

1989-01-20

389

VARIABLES INFLUENCING PREDATION OF ARTIFICIAL DUCK NESTS IN NORTHWEST COASTAL CALIFORNIA  

E-print Network

11 VARIABLES INFLUENCING PREDATION OF ARTIFICIAL DUCK NESTS IN NORTHWEST COASTAL CALIFORNIA MATTHEW influencing duck-nest predation near Humboldt Bay in northern California by testing the prediction of egg loss. The best-fit model for nest fate included lateral cover and study site variables. Among

Johnson, Matthew

390

Digital-model evaluation of the ground-water resources in Ocotillo-Coyote Wells Basin, Imperial County, California  

USGS Publications Warehouse

A flow model using finite-element techniques has been constructed for an alluvial aquifer in the Ocotillo-Coyote Wells Basin, Imperial County, Calif. Natural recharge is about 2,600 acre-feet per year, and estimated ground water in storage is 640 ,000 acre-feet. Pumpage totaled 880 acre-feet in 1975. The computed decline from steady-state conditions in 1925 to December 1975 was 15 feet in Ocotillo. The projected decline from 1976 to 1995 with annual pumpage of 1,000 acre-feet is 6 feet and with annual pumpage of 2,000 acre-feet is 17 feet in Ocotillo. In the latter projection, continued pumping after 1995 may cause saline water to flow toward the potable ground water in and around Ocotillo. (Woodard-USGS)

Skrivan, James A.

1977-01-01

391

Characteristics of dens used by radiocollared San Joaquin kit fox, Vulpes macrotis mutica, Naval Petroleum Reserve No. 1, Kern County, California  

SciTech Connect

A total of 946 dens used by radiocollared San Joaquin kit foxes, Vulpes macrotis mutica, were observed on Naval Petroleum Reserve No. 1 and surrounding lands in Kern County, California. Of these, 887 were typical subterranean dens located in 65 sections, and 59 were atypical dens in man-made structures located in 24 sections and in two pipe storage yards. Although the number of entrances to dens ranged between 1 and 17, most (90%) had six or fewer entrances and the average, which did not differ between developed and undeveloped habitats, was 3.4. Entrances were significantly higher than wide, and 53% had ramp-shaped dirt berms. Dens had an average slope angle of 16.1/sup 0/ and more were found on slopes than in flats. Fewer dens faced the northwest quadrant and more faced the southern quadrant than expected. Evidence of kit foxes (tracks, scats, or prey remains) was observed at 80% of the dens, but 11% were not associated with kit fox sign (matted vegetation or trails) even though they were occupied. Human disturbances, most frequently roads, were observed in the immediate vicinity of 78% of the dens. Most (93%) atypical dens were in metal pipes, three were in buried wooden culverts, and one was under a concrete slab. 27 refs., 7 figs., 10 tabs.

Berry, W.H.; O'Farrell, T.P.; Kato, T.T.; McCue, P.M.

1987-08-01

392

Diet of the San Joaquin kit fox, Vulpes macrotis mutica, on Naval Petroleum Reserve No. 1, Kern County, California, 1980-1984  

SciTech Connect

A total of 1430 scats of the San Joaquin kit fox, Vulpes macrotis mutica, were collected between 1980 and 1984 on Naval Petroleum Reserve No. 1, Kern County, California, and analyzed to determine frequency of occurrence of prey items. Lagomorphs (black-tailed jackrabbits and desert cotton-tails) were the primary prey species (frequency of occurrence = 73%); while kangaroo rats (Dipodomys spp.) were the next most common (13%). The proportions of lagomorphs and kangaroo rats in the diet did not differ between sexes of foxes, periods of the year, or topography. Intensity of petroleum developments had no observable influence on food habits. There were annual differences in diet: proportions of lagomorphs declined, and proportions of kangaroo rats increased between 1980-1984. Changes in the frequency of occurrence of lagomorphs were significantly correlated with changes in their relative abundance in undeveloped-flat habitat. The frequency of occurrence of kangaroo rats was not significantly correlated with their relative abundance. San Joaquin kit fox on NPR-1 fed primarily on lagomorphs, and had the ability to sustain themselves on kangaroo rats and other secondary prey when their primary prey declined.

Scrivner, J.H.; O'Farrell, T.P.; Kato, T.T.; Johnson, M.K.

1987-06-01

393

Capture-recapture estimation of San Joaquin kit fox population size on Naval Petroleum Reserve No. 1, Kern County, California. [Vulpes macrotis mutica  

SciTech Connect

San Joaquin kit fox (Vulpes macrotis mutica) population size was estimated semiannually on the US Department of Energy's Naval Petroleum Reserve No. 1, Kern County, California, between December 1980 and August 1986 using capture-recapture data. Estimates were derived using a calendar graph (minimum population size) and appropriate models that allowed for unequal probability of capture. A total of 469 foxes were captured 930 times. There was a significant decline between the peak population estimates (164, minimum population size; 262, closed population model estimate) obtained in winter 1981 and the estimates for winter 1985 (41, minimum population size; 56, closed population model estimate). Population trends for the portion of the study area affected by petroleum development activities did not differ from those observed in undeveloped habitats. Closed population model tests provided evidence of behavioral response and heterogeneity of capture probability in the kit fox. The proportion of animals known to be alive but untrapped each session ranged between 14% and 77% which also indicated variable trap response. Closed population models provided reliable estimates of population size and its variance when the number of individual foxes captured was at least 40 to 50. Use of the Jolly-Seber open population model with this data set was rejected by the goodness-of-fit test because of the small number of marked foxes that were captured each trapping period and the small number of marked foxes from each release that were eventually recaptured.

Harris, C.E.; O'Farrell, T.P.; McCue, P.M.; Kato, T.T.

1987-01-01

394

Results of preconstruction surveys used as a management technique for conserving endangered species and their habitats on Naval Petroleum Reserve No. 1 (Elk Hills), Kern County, California  

SciTech Connect

In 1976 an intensive program of petroleum production at maximum efficient rate was initiated on the US Department of Energy's (DOE) Naval Petroleum Reserve No. 1 (Elk Hills) in western Kern County, California. In a Biological Opinion required by the Endangered Species Act, the US Fish and Wildlife Service concluded that proposed construction and production activities may jeopardize the continued existence of the endangered San Joaquin kit fox, Vulpes macrotis mutica, and the blunt-nosed leopard lizard, Gambelia silus, inhabiting the Reserve. DOE committed itself to carrying out a compensation/mitigation plan to offset impacts of program activities on endangered species and their habitats. One compensation/mitigation strategy was to develop and implement preconstruction surveys to assess potential conflicts between proposed construction activities, and endangered species and their critical habitats, and to propose reasonable and prudent alternatives to avoid conflicts. Between 1980 and 1984, preconstruction surveys were completed for 296 of a total of 387 major construction projects encompassing 3590 acres. Fewer than 22% of the projects potentially conflicted with conservation of endangered species, and most conflicts were easily resolved by identifying sensitive areas that required protection. Only 8% of the projects received minor modification in their design or locations to satisfy conservation needs, and only three projects had to be completely relocated. No projects were cancelled or delayed because of conflicts with endangered species, and costs to conduct preconstruction surveys were minimal. 27 refs., 9 figs., 2 tabs.

Kato, T.T.; O'Farrell, T.P.; Johnson, J.W.

1985-08-01

395

Dietary Isothiocyanates, Glutathione S-Transferase M1 (GSTM1), and Lung Cancer Risk in African Americans and Caucasians from Los Angeles County, California  

PubMed Central

Isothiocyanates, found in cruciferous vegetables, are anti-carcinogenic. Racial differences in smoking do not fully account for the African American excess lung cancer incidence. African Americans consume more cruciferous vegetables than US Whites. Impact on lung cancer risk is unknown. Glutathione S transferase M1 (GSTM1) gene promotes urinary isothiocyanate excretion. We evaluated dietary isothiocyanates and lung cancer using a population-based case-control study of 933 African Americans and Caucasians (non-Hispanic US White) from Los Angeles County, California (311 cases; 622 controls). Broccoli, cauliflower, greens and cabbage food-frequency variables represented isothiocyanates. Isothiocyanates were protective for lung cancer risk. Adjusted odds ratio (OR) for the uppermost quartile, > 80 ?Mol isothiocyanates/week, compared to lowest, was 0.65 (95% confidence interval (CL) = 0.41 – 1.00, trend p = 0.02). Association was stronger among subjects with homozygous deletion of GSTM1 (OR=0.52; 95% CL = 0.31 – 0.86), than subjects with at least one GSTM1 copy (OR = 0.77; 95% CL = 0.49 – 1.21). Difference was not statistically significant (p = 0.16). Despite African Americans consuming more cruciferous vegetables, the isothiocyanate association did not vary by race (p=0.52). Reduced lung cancer risk with higher isothiocyanate intake may be slightly stronger among subjects with deletion of GSTM1. PMID:19838921

Carpenter, Catherine L.; Yu, Mimi C.; London, Stephanie J.

2013-01-01

396

Petroleum production at Maximum Efficient Rate Naval Petroleum Reserve No. 1 (Elk Hills), Kern County, California. Final Supplemental Environmental Impact Statement  

SciTech Connect

This document provides an analysis of the potential impacts associated with the proposed action, which is continued operation of Naval Petroleum Reserve No. I (NPR-1) at the Maximum Efficient Rate (MER) as authorized by Public law 94-258, the Naval Petroleum Reserves Production Act of 1976 (Act). The document also provides a similar analysis of alternatives to the proposed action, which also involve continued operations, but under lower development scenarios and lower rates of production. NPR-1 is a large oil and gas field jointly owned and operated by the federal government and Chevron U.SA Inc. (CUSA) pursuant to a Unit Plan Contract that became effective in 1944; the government`s interest is approximately 78% and CUSA`s interest is approximately 22%. The government`s interest is under the jurisdiction of the United States Department of Energy (DOE). The facility is approximately 17,409 acres (74 square miles), and it is located in Kern County, California, about 25 miles southwest of Bakersfield and 100 miles north of Los Angeles in the south central portion of the state. The environmental analysis presented herein is a supplement to the NPR-1 Final Environmental Impact Statement of that was issued by DOE in 1979 (1979 EIS). As such, this document is a Supplemental Environmental Impact Statement (SEIS).

Not Available

1993-07-01

397

Water-quality and sediment-chemistry data of drain water and evaporation ponds from Tulare Lake Drainage District, Kings County, California, March 1985 to March 1986  

SciTech Connect

Trace element and major ion concentrations were measured in water samples collected monthly between March 1985 and March 1986 at the MD-1 pumping station at the Tulare Lake Drainage District evaporation ponds, Kings County, California. Samples were analyzed for selected pesticides several times during the year. Salinity, as measured by specific conductance, ranged from 11,500 to 37,600 microsiemens/centimeter; total recoverable boron ranged from 4,000 to 16,000 micrg/L; and total recoverable molybdenum ranged from 630 to 2,600 microg/L. Median concentrations of total arsenic and total selenium were 97 and 2 microg/L. Atrazine, prometone, propazine, and simazine were the only pesticides detected in water samples collected at the MD-1 pumping station. Major ions, trace elements, and selected pesticides also were analyzed in water and bottom-sediment samples from five of the southern evaporation ponds at Tulare Lake Drainage District. The water samples increased in specific conductance and concentrations of total arsenic, total recoverable boron and total recoverable molybdenum going from pond 1 to pond 10, respectively. Median concentrations of total arsenic and total selenium in the bottom sediments were 4.0 and 0.9 microg/g, respectively. 6 refs., 2 figs., 12 tabs.

Fujii, R.

1988-01-01

398

Distinguishing sediment waves from slope failure deposits: Field examples, including the 'humboldt slide', and modelling results  

USGS Publications Warehouse

Migrating sediment waves have been reported in a variety of marine settings, including submarine levee-fan systems, floors of fjords, and other basin or continental slope environments. Examination of such wave fields reveals nine diagnostic characteristics. When these characteristics are applied to several features previously attributed to submarine landslide deformation, they suggest that the features should most likely be reinterpreted as migrating sediment-wave fields. Sites that have been reinterpreted include the 'Humboldt slide' on the Eel River margin in northern California, the continental slope in the Gulf of Cadiz, the continental shelf off the Malaspina Glacier in the Gulf of Alaska, and the Adriatic shelf. A reassessment of all four features strongly suggests that numerous turbidity currents, separated by intervals of ambient hemipelagic sedimentation, deposited the wave fields over thousands of years. A numerical model of hyperpycnal discharge from the Eel River, for example, shows that under certain alongshore-current conditions, such events can produce turbidity currents that flow across the 'Humboldt slide', serving as the mechanism for the development of migrating sediment waves. Numerical experiments also demonstrate that where a series of turbidity currents flows across a rough seafloor (i.e. numerical steps), sediment waves can form and migrate upslope. Hemipelagic sedimentation between turbidity current events further facilitates the upslope migration of the sediment waves. Physical modelling of turbidity currents also confirms the formation and migration of seafloor bedforms. The morphologies of sediment waves generated both numerically and physically in the laboratory bear a strong resemblance to those observed in the field, including those that were previously described as submarine landslides.

Lee, H.J.; Syvitski, J.P.M.; Parker, G.; Orange, D.; Locat, J.; Hutton, E.W.H.; Imran, J.

2002-01-01

399

A crisis of community anxiety and mistrust: the Medfly eradication project in Santa Clara County, California, 1981-82.  

PubMed Central

Public anxiety of near panic proportions was created by the announcement of a plan to commence aerial application of malathion bait over a large urban area in California for the eradication of the Mediterranean fruit fly within four days. A risk assessment had reported the project entailed no significant risk to health but environmentalist groups and the media ignored the report. We describe the successful measures taken by State health workers to counteract the anxiety which itself constituted a serious public health problem. The most important measure was the rapid convening of a Health Advisory Committee composed of recognized experts and local professionals and leaders to provide an authoritative, respected and sympathetic voice to deal with the community's concerns. These experiences may be of value to other communities facing unwarranted anxiety over perceived environmental hazards. PMID:2240293

Kahn, E; Jackson, R J; Lyman, D O; Stratton, J W

1990-01-01

400

An evaluation of problems arising from acid mine drainage in the vicinity of Shasta Lake, Shasta County, California  

USGS Publications Warehouse

Streams draining the mined areas of massive sulfide ore deposits in the Shasta Mining Districts of northern California are generally acidic and contain large concentrations of dissolved metals, including iron, copper, and zinc. The streams, including Flat, Little Backbone, Spring, West Squaw, Horse, and Zinc Creeks, discharge into Shasta Reservoir and the Sacramento River and have caused numerous fish kills. The sources of pollution are discharge from underground mines, streams that flow into open pits, and streams that flow through pyritic mine dumps where the oxidation of pyrite and other sulfide minerals results in the production of acid and the mobilization of metals. Suggested methods of treatment include the use of air and hydraulic seals in the mines, lime neutralization of mine effluent, channeling of runoff and mine effluent away from mine and tailing areas, and the grading and sealing of mine dumps. A comprehensive preabatement and postabatement program is recommended to evaluate the effects of any treatment method used. (Woodard-USGS)

Fuller, Richard H.; Shay, J.M.; Ferreira, R.F.; Hoffman, R.J.

1978-01-01

401

78 FR 41390 - Pershing County Water Conservation District; Notice of Application Tendered for Filing with the...  

Federal Register 2010, 2011, 2012, 2013, 2014

...At the existing U.S. Bureau of Reclamation's (Reclamation) Rye Patch dam on the Humboldt River, nearby the Town of Lovelock, Pershing County, Nevada. The project would occupy 0.25 acre of Reclamation lands. g. Filed Pursuant to: Federal...

2013-07-10

402

Ground-water data, 1974-76, Indian Wells Valley, Kern, Inyo, and San Bernardino Counties, California  

USGS Publications Warehouse

Water-level measurements were made annually in 115 wells in Indian Wells Valley, Kern, Inyo, and San Bernardino Counties, Calif., in 1974-76. In the Inyokern area the average water-level decline was 2.0 ft for two wells between October 1973 and November 1976. In the intermediate area the average decline was 6.2 ft for five wells between October 1973 and December 1976. In the Ridgecrest area the average decline was 4.5 ft for four wells between October 1973 and December 1976 but was 10.3 ft for one well during the same period. Reported metered ground-water pumpage from Indian Wells Valley totaled 14,400 acre-ft in 1974, 14,500 acre-ft in 1975, and 14,100 acre-ft in 1976. These figures may not completely reflect the total pumpage from the basin due to changing patterns of land use and new pumping sources. Chemical analyses were made of 102 water samples collected from 42 wells during 1974-76. The analyses show large variance of quality of ground water in Indian Wells Valley. (Woodard-USGS)

Lamb, C.E.; Downing, D.J.

1978-01-01

403

Preliminary surficial geologic map of a Calico Mountains piedmont and part of Coyote Lake, Mojave desert, San Bernardino County, California  

USGS Publications Warehouse

This 1:24,000 scale detailed surficial geologic map and digital database of a Calico Mountains piedmont and part of Coyote Lake in south-central California depicts surficial deposits and generalized bedrock units. The mapping is part of a USGS project to investigate the spatial distribution of deposits linked to changes in climate, to provide framework geology for land use management (http://deserts.wr.usgs.gov), to understand the Quaternary tectonic history of the Mojave Desert, and to provide additional information on the history of Lake Manix, of which Coyote Lake is a sub-basin. Mapping is displayed on parts of four USGS 7.5 minute series topographic maps. The map area lies in the central Mojave Desert of California, northeast of Barstow, Calif. and south of Fort Irwin, Calif. and covers 258 sq.km. (99.5 sq.mi.). Geologic deposits in the area consist of Paleozoic metamorphic rocks, Mesozoic plutonic rocks, Miocene volcanic rocks, Pliocene-Pleistocene basin fill, and Quaternary surficial deposits. McCulloh (1960, 1965) conducted bedrock mapping and a generalized version of his maps are compiled into this map. McCulloh's maps contain many bedrock structures within the Calico Mountains that are not shown on the present map. This study resulted in several new findings, including the discovery of previously unrecognized faults, one of which is the Tin Can Alley fault. The north-striking Tin Can Alley fault is part of the Paradise fault zone (Miller and others, 2005), a potentially important feature for studying neo-tectonic strain in the Mojave Desert. Additionally, many Anodonta shells were collected in Coyote Lake lacustrine sediments for radiocarbon dating. Preliminary results support some of Meek's (1999) conclusions on the timing of Mojave River inflow into the Coyote Basin. The database includes information on geologic deposits, samples, and geochronology. The database is distributed in three parts: spatial map-based data, documentation, and printable map graphics of the database. Spatial data are distributed as an ArcInfo personal geodatabase, or as tabular data in the form of Microsoft Access Database (MDB) or dBase Format (DBF) file formats. Documentation includes this file, which provides a discussion of the surficial geology and describes the format and content of the map data, and Federal Geographic Data Committee (FGDC) metadata for the spatial map information. Map graphics files are distributed as Postscript and Adobe Acrobat Portable Document Format (PDF) files, and are appropriate for representing a view of the spatial database at the mapped scale.

Dudash, Stephanie L.

2006-01-01

404

Geologic Map and Map Database of the Oakland Metropolitan Area, Alameda, Contra Costa, and San Francisco Counties, California  

USGS Publications Warehouse

Introduction This report contains a new geologic map at 1:50,000 scale, derived from a set of geologic map databases containing information at a resolution associated with 1:24,000 scale, and a new description of geologic map units and structural relationships in the mapped area. The map database represents the integration of previously published reports and new geologic mapping and field checking by the author (see Sources of Data index map on the map sheet or the Arc-Info coverage pi-so and the textfile pi-so.txt). The descriptive text (below) contains new ideas about the Hayward fault and other faults in the East Bay fault system, as well as new ideas about the geologic units and their relations. These new data are released in digital form in conjunction with the Federal Emergency Management Agency Project Impact in Oakland. The goal of Project Impact is to use geologic information in land-use and emergency services planning to reduce the losses occurring during earthquakes, landslides, and other hazardous geologic events. The USGS, California Division of Mines and Geology, FEMA, California Office of Emergency Services, and City of Oakland participated in the cooperative project. The geologic data in this report were provided in pre-release form to other Project Impact scientists, and served as one of the basic data layers for the analysis of hazard related to earthquake shaking, liquifaction, earthquake induced landsliding, and rainfall induced landsliding. The publication of these data provides an opportunity for regional planners, local, state, and federal agencies, teachers, consultants, and others outside Project Impact who are interested in geologic data to have the new data long before a traditional paper map could be published. Because the database contains information about both the bedrock and surficial deposits, it has practical applications in the study of groundwater and engineering of hillside materials, as well as the study of geologic hazards and the academic research on the geologic history and development of the region.

Graymer, R.W.

2000-01-01

405

Appel candidatures pour le Prix scientifique franco-allemand Gay-Lussac Humboldt  

E-print Network

Appel à candidatures pour le Prix scientifique franco-allemand Gay-Lussac Humboldt année 2014 Le Prix Gay-Lussac Humboldt, créé en 1981, est attribué par le ministère de l'Enseignement supérieur et de-allemand Gay-Lussac Humboldt Année 2014 Dossier de candidature à retourner le 30 juin 2014 au plus tard sous

Canet, Léonie

406

Water-resources monitoring in the Cottonwood Creek area, Shasta and Tehama counties, California, 1982-83  

USGS Publications Warehouse

The Cottonwood Creek study area in the Redding basin, California , contains a network of wells established to provide baseline information on ground-water levels and quality prior to the completion of two proposed dams, one on Cottonwood Creek and one on South Fork Cottonwood Creek. Analysis of monthly ground-water levels from September 1982 through September 1983 shows lowest water levels in autumn and highest in spring. The ground-water surface slopes east and has a mound at Anderson-Cottonwood Irrigation District Canal near the town of Cottonwood. Future studies here could provide additional information needed for subsequent modeling studies. Data are insufficient upstream from the damsites, specifically in areas of future impoundment where the monitoring network could be expanded. Comparison of ground-water quality samples collected from periods of lowest and highest water levels showed little chemical variation. Ground water is good to excellent with respect to recommended drinking-water standards. Ground-water types north of Cottonwood Creek are sodium magnesium or magnesium sodium bicarbonate and south of Cottonwood Creek are calcium magnesium or magnesium calcium bicarbonate. Surface-water samples from Cottonwood and South Fork Cottonwood Creeks indicate water chemically similar to ground water south of Cottonwood Creek. (USGS)

Fogelman, R.P.; Evenson, K.D.

1985-01-01

407

Transformation of dilative and contractive landslide debris into debris flows-An example from marin County, California  

USGS Publications Warehouse

The severe rainstorm of January 3, 4 and 5, 1982, in the San Francisco Bay area, California, produced numerous landslides, many of which transformed into damaging debris flows. The process of transformation was studied in detail at one site where only part of a landslide mobilized into several episodes of debris flow. The focus of our investigation was to learn whether the landslide debris dilated or contracted during the transformation from slide to flow. The landslide debris consisted of sandy colluvium that was separable into three soil horizons that occupied the axis of a small topographic swale. Failure involved the entire thickness of colluvium; however, over parts of the landslide, the soil A-horizon failed separately from the remainder of the colluvium. Undisturbed samples were taken for density measurements from outside the landslide, from the failure zone and overlying material from the part of the landslide that did not mobilize into debris flows, and from the debris-flow deposits. The soil A-horizon was contractive and mobilized to flows in a process analogous to liquefaction of loose, granular soils during earthquakes. The soil B- and C-horizons were dilative and underwent 2 to 5% volumetric expansion during landslide movement that permitted mobilization of debris-flow episodes. Several criteria can be used in the field to differentiate between contractive and dilative behavior including lag time between landsliding and mobilization of flow, episodic mobilization of flows, and partial or complete transformation of the landslide. ?? 1989.

Fleming, R.W.; Ellen, S.D.; Algus, M.A.

1989-01-01

408

Rice Straw Compost as a Soil Amendment for the Reduction of Surface Runoff in Almond Orchards in Glenn County, California  

NASA Astrophysics Data System (ADS)

Almond production in the Northern Sacramento Valley is dependant on dormant season pesticide application and fertilizers. However, over the past 10 years there has been increased demand from public and regulatory agencies for farmers to reduce the movement of agricultural chemicals into local water sources. Many pesticides of concern have been detected in California watersheds particularly after runoff producing storm events. Two methods of reducing surface runoff into local waterways are to increase orchard soil infiltration rates, and to use riparian buffers to reduce surface flow velocity or runoff that does occur. Organic rice straw compost was applied in an orchard to examine its effect on soil infiltration and runoff. A rainfall simulator was developed capable of producing a 2.54 cm per hour storm and covering an area roughly 3 meter diameter. Runoff and infiltration are being tested from three orchard cells with the compost addition and three orchard cells without. Infiltration and runoff are also being monitored at three plots in a nearby riparian buffer strip. Runoff samples are being analyzed for nutrients, pH, EC and aqueous carbon content.

Coelho, C.; McKinney, M.; Brown, D.; Johns, M.

2004-12-01

409

Log of Trench 04A Across the Hayward Fault at Tyson's Lagoon (Tule Pond), Fremont, Alameda County, California  

USGS Publications Warehouse

This publication makes available a detailed trench log (sheets 1 and 2) of a 110-m trench we excavated in 2004 across a tectonic sag pond in the Hayward fault zone. Also included are revised stratigraphic unit descriptions from this fifth field season of subsurface investigation of the Hayward fault at Tyson's Lagoon (Tule Pond). Preliminary findings based on fieldwork done in 2000 have been published (Lienkaemper and others: data archive, 2002a; report, 2002b), as were the logs and data for 2001-2003 (Lienkaemper and others, 2003, L03). A continuous exposure of the geologic section across the entire pond made in 2004 (Fig. 1, 04A) has revealed some critical miscorrelations of units made in the original on-line version of L03, hence users of these earlier trench data should only use the 2005 revised version 2.0 of L03 for correlation purposes. Lienkaemper, Williams, and Sickler interpreted the geology and logged the trenches. Fumal did most of the trench photography. The Hayward fault is recognized to be among the most hazardous in the United States (Working Group on California Earthquake Probabilities, 2003). Establishing a chronology of prehistoric or paleoearthquakes is of immediate use in resolving the likelihood of future large earthquakes Hayward fault. This document makes available geologic evidence for historical and prehistoric surface-rupturing earthquakes preserved at the site. A second, formal report on our conclusions based on these data is in preparation.

Lienkaemper, James J.; Williams, Patrick L.; Sickler, Robert R.; Fumal, Thomas E.

2005-01-01

410

8. EEL RIVER SOUTH FORK BRIDGE, OLD HIGHWAY 101. NORTH ...  

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

8. EEL RIVER SOUTH FORK BRIDGE, OLD HIGHWAY 101. NORTH OF LEGGETT, HUMBOLDT COUNTY, CALIFORNIA. LOOKING N. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

411

9. EEL RIVER SOUTH FORK BRIDGE, OLD HIGHWAY 101. NORTH ...  

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

9. EEL RIVER SOUTH FORK BRIDGE, OLD HIGHWAY 101. NORTH OF LEGGETT, HUMBOLDT COUNTY, CALIFORNIA. LOOKING W. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

412

3. CEDAR CREEK BRIDGE, OLD HIGHWAY 101. SOUTH OF LEGGETT, ...  

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

3. CEDAR CREEK BRIDGE, OLD HIGHWAY 101. SOUTH OF LEGGETT, HUMBOLDT COUNTY, CALIFORNIA. LOOKING NW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

413

18. STONE ARCH BRIDGE, OLD HIGHWAY 101, AT BENBOW INN. ...  

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

18. STONE ARCH BRIDGE, OLD HIGHWAY 101, AT BENBOW INN. SOUTH OF GARBERVILLE, HUMBOLDT COUNTY, CALIFORNIA. LOOKING W. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

414

26. BOLLING MEMORIAL GROVE PLAQUE, AVENUE OF THE GIANTS, OLD ...  

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

26. BOLLING MEMORIAL GROVE PLAQUE, AVENUE OF THE GIANTS, OLD HIGHWAY 101. HUMBOLDT COUNTY, CALIFORNIA. LOOKING E. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

415

16. SMITH POINT BRIDGE ON OLD HIGHWAY 101. SOUTH OF ...  

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

16. SMITH POINT BRIDGE ON OLD HIGHWAY 101. SOUTH OF GARBERVILLE, HUMBOLDT COUNTY, CALIFORNIA. LOOKING NNE. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

416

69. AVENUE OF THE GIANTS, OLD HIGHWAY 101, ROAD VIEW ...  

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

69. AVENUE OF THE GIANTS, OLD HIGHWAY 101, ROAD VIEW 1.5 MILES NORTH OF MIRANDA. HUMBOLDT COUNTY, CALIFORNIA. LOOKING N. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

417

4. BIG DAN CREEK BRIDGE, OLD HIGHWAY 101. SOUTH OF ...  

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

4. BIG DAN CREEK BRIDGE, OLD HIGHWAY 101. SOUTH OF LEGGETT, HUMBOLDT COUNTY, CALIFORNIA. LOOKING NE. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

418

21. AVENUE OF THE GIANTS, OLD HIGHWAY 101, ROAD VIEW ...  

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

21. AVENUE OF THE GIANTS, OLD HIGHWAY 101, ROAD VIEW 1.5 MILES NORTH OF MIRANDA. HUMBOLDT COUNTY, CALIFORNIA. LOOKING N. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

419

20. AVENUE OF THE GIANTS, OLD HIGHWAY 101, ROAD VIEW ...  

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

20. AVENUE OF THE GIANTS, OLD HIGHWAY 101, ROAD VIEW .5 MILE NORTH OF MIRANDA. HUMBOLDT COUNTY, CALIFORNIA. LOOKING NW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

420

68. AVENUE OF THE GIANTS, OLD HIGHWAY 101, ROAD VIEW ...  

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

68. AVENUE OF THE GIANTS, OLD HIGHWAY 101, ROAD VIEW .5 MILE NORTH OF MIRANDA. HUMBOLDT COUNTY, CALIFORNIA. LOOKING NW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

421

27. AVENUE OF THE GIANTS SIGN AT NORTH END OF ...  

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

27. AVENUE OF THE GIANTS SIGN AT NORTH END OF ROAD. PEPPERWOOD, HUMBOLDT COUNTY, CALIFORNIA. LOOKING S. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

422

22. BRIDGE CREEK BRIDGE, AVENUE OF THE GIANTS, OLD HIGHWAY ...  

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

22. BRIDGE CREEK BRIDGE, AVENUE OF THE GIANTS, OLD HIGHWAY 101. HUMBOLDT COUNTY, CALIFORNIA. LOOKING E. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

423

14. TURNOUT AND MASONRY GUARD WALL 1.5 MILES NORTH OF ...  

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

14. TURNOUT AND MASONRY GUARD WALL 1.5 MILES NORTH OF TREE HOUSE SOUTH OF PIERCY, HUMBOLDT COUNTY, CALIFORNIA. LOOKING SW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

424

12. WORLD'S FAMOUS TREE HOUSE AND ROAD VIEW. SOUTH OF ...  

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

12. WORLD'S FAMOUS TREE HOUSE AND ROAD VIEW. SOUTH OF PIERCY, HUMBOLDT COUNTY, CALIFORNIA. LOOKING SW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

425

Gas and Isotope Geochemistry of 81 Steam Samples from Wells in The Geysers Geothermal Field, Sonoma and Lake Counties, California  

USGS Publications Warehouse

The Geysers geothermal field in northern California, with about 2000-MW electrical capacity, is the largest geothermal field in the world. Despite its importance as a resource and as an example of a vapor-dominated reservoir, very few complete geochemical analyses of the steam have been published (Allen and Day, 1927; Truesdell and others, 1987). This report presents data from 90 steam, gas, and condensate samples from wells in The Geysers geothermal field in northern California. Samples were collected between 1978 and 1991. Well attributes include sampling date, well name, location, total depth, and the wellhead temperature and pressure at which the sample was collected. Geochemical characteristics include the steam/gas ratio, composition of noncondensable gas (relative proportions of CO2, H2S, He, H2, O2, Ar, N2, CH4, and NH3), and isotopic values for deltaD and delta18O of H2O, delta13C of CO2, and delta34S of H2S. The compilation includes 81 analyses from 74 different production wells, 9 isotopic analyses of steam condensate pumped into injection wells, and 5 complete geochemical analyses on gases from surface fumaroles and bubbling pools. Most samples were collected as saturated steam and plot along the liquid-water/steam boiling curve. Steam-togas ratios are highest in the southeastern part of the geothermal field and lowest in the northwest, consistent with other studies. Wells in the Northwest Geysers are also enriched in N2/Ar, CO2 and CH4, deltaD, and delta18O. Well discharges from the Southeast Geysers are high in steam/gas and have isotopic compositions and N2/Ar ratios consistent with recharge by local meteoric waters. Samples from the Central Geysers show characteristics found in both the Southeast and Northwest Geysers. Gas and steam characteristics of well discharges from the Northwest Geysers are consistent with input of components from a high-temperature reservoir containing carbonrich gases derived from the host Franciscan rocks. Throughout the geothermal field, the carbon-isotopic composition of CO2 is consistent with derivation of carbon from Franciscan metasedimentary rocks. NH3 concentrations are high in most Geysers well fluids, and are 2-3 orders of magnitude greater than would be expected in a the gas phase exhibiting homogeneous equilibrium at normal reservoir temperatures and pressures. Evidently, NH3 is flushed from the Franciscan host rocks at a rate that exceeds the reaction rate for NH3 breakdown. Many wells show clear influence by fluids from reinjection wells where steam condensate has been pumped back into the geothermal reservoir. Six wells were resampled over the time period of this study. One of these six wells was strongly affected by a nearby injection well. Three of the six resampled wells showed some signs of decreasing liquid/ steam within the geothermal reservoir, consistent with 'drying out' of the reservoir due to steam withdrawal. However, two wells exhibited little change. Analyses of gases from five surface manifestations (fumaroles and bubbling pools) are roughly similar to the deeper geothermal samples in both chemical and isotopic composition, but are lower in soluble gases that dissolve in groundwater during transit toward the surface.

Lowenstern, Jacob B.; Janik, Cathy J.; Fahlquist, Lynne; Johnson, Linda S.

1999-01-01

426

Cone Penetration Test and Soil Boring at the Bayside Groundwater Project Site in San Lorenzo, Alameda County, California  

USGS Publications Warehouse

Aquifer-system deformation associated with ground-water-level changes is being investigated cooperatively by the U.S. Geological Survey (USGS) and the East Bay Municipal Utility District (EBMUD) at the Bayside Groundwater Project (BGP) near the modern San Francisco Bay shore in San Lorenzo, California. As a part of this project, EBMUD has proposed an aquifer storage and recovery (ASR) program to store and recover as much as 3.78x104 m3/d of water. Water will be stored in a 30-m sequence of coarse-grained sediment (the 'Deep Aquifer') underlying the east bay alluvium and the adjacent ground-water basin. Storing and recovering water could cause subsidence and uplift at the ASR site and adjacent areas because the land surface will deform as aquifers and confining units elastically expand and contract with ASR cycles. The Deep Aquifer is overlain by more than 150 m of clayey fine-grained sediments and underlain by comparable units. These sediments are similar to the clayey sediments found in the nearby Santa Clara Valley, where inelastic compaction resulted in about 4.3 m of subsidence near San Jose from 1910 to 1995 due to overdraft of the aquifer. The Deep Aquifer is an important regional resource, and EBMUD is required to demonstrate that ASR activities will not affect nearby ground-water management, salinity levels, or cause permanent land subsidence. Subsidence in the east bay area could induce coastal flooding and create difficulty conveying winter storm runoff from urbanized areas. The objective of the cooperative investigation is to monitor and analyze aquifer-system compaction and expansion, as well as consequent land subsidence and uplift resulting from natural causes and any anthropogenic causes related to ground-water development and ASR activities at the BGP. Therefore, soil properties related to compressibility (and the potential for deformation associated with ground-water-level changes) are of the most concern. To achieve this objective, 3 boreholes were drilled at the BGP for the purpose of monitoring pore-fluid pressure changes and aquifer-system deformation. One 308-m deep borehole contains six piezometers, the other two boreholes are 182 and 299 m deep and contain a dual-stage extensometer. To investigate the physical properties of the sediments, two phases of subsurface exploration were conducted. In the first phase, a USGS drilling crew obtained numerous core samples, 5.8 cm in diameter by 1.5 m long. The samples were extracted between July 28, 2006, and August 5, 2006; nine samples were tested for this study at the USGS soils laboratory in Menlo Park, California. Phase two began on June 22, 2006, when a seismic cone penetration test (SCPT) sounding was made to a depth of 32.3 m. Additional field work was completed May 8, 2007, with a hollow-stem auger boring that took continuous 9.8-cm-diameter samples from the depth interval of 6.1 to 10.7 m to supplement poor recovery from the first phase of sampling. These samples were also tested in the soils laboratory at the USGS.

Bennett, Michael J.; Sneed, Michelle; Noce, Thomas E.; Tinsley, John C.

2009-01-01

427

The Obsidian Creep Project: Seismic Imaging in the Brawley Seismic Zone and Salton Sea Geothermal Field, Imperial County, California  

NASA Astrophysics Data System (ADS)

In March 2010, we acquired medium- and high-resolution P- and S-wave seismic reflection and refraction data across faults in the Brawley seismic zone (BSZ) and across part of the Salton Sea Geothermal Field (SSGF), Imperial Valley, California. Our objectives were to determine the dip, possible structural complexities, and seismic velocities associated with the BSZ and SSGF. We acquired multiple seismic data sets along a north-south profile and a high-resolution P-wave profile along an east-west profile. The north-south profile included: 1) a 6.4-km-long P-wave (main) profile that was recorded on 320 Texan seismographs spaced at 20-m intervals, 2) a 1.2-km-long cabled, high-resolution profile along the northern end of the main profile, and 3) an approximately 1.2-km-long S-wave profile along the cabled profile. P-wave sources along the main profile were generated by 0.15- to 0.45-kg buried explosions spaced every 40 m, and P-wave sources along the cabled profile were generated by Betsy-Seisgun ‘shots’ spaced every 10 m. S-waves sources were generated by hammer impacts on the ends of an aluminum block. The east-west profile consisted of a 3.4-km-long high-resolution P-wave seismic profile with shots (Betsy-Seisgun) and geophones spaced every 10 m. Preliminary interpretation of shot gathers from blasts in the north-south profile suggests that the BSZ and SSGF are structurally complex, with abundant faults extending to or near the ground surface. Also, we observe relatively high-velocity material, apparent velocities of about 4.0 km/s in one direction and about 2.8 km/s in another relative to about 1.6 km/s for shallower material, that shallows beneath the SSGF. This may be due to high temperatures and resultant metamorphism of buried materials in the SSGF. From preliminary interpretation of shot gathers along the east-west profile we interpret a prominent fault that extends to the ground surface. This fault is on projection of the Kalin fault, from about 40 m to the south, which broke the surface during a local swarm of earthquakes in 2005 and which also slipped at the surface in association with the 2010 El Mayor-Cucapah earthquake in Baja California. The faults imaged in our profiles will be compared to high-precision earthquake relocations for the 2005 earthquake swarm and more recent events recorded by the Cal Energy borehole seismic network, and will be used as input into a reanalysis of geodetic observations spanning the 2005 earthquake swarm. The combined Obsidian Creep data set provides the most detailed, publicly available subsurface images of fault structures in the BSZ and SSGF.

Catchings, R. D.; Rymer, M. J.; Goldman, M.; Lohman, R. B.; McGuire, J. J.

2010-12-01

428

Summary and evaluation of the kit fox relocation program, Naval Petroleum Reserve No. 1, Kern County, California  

SciTech Connect

In 1988, the U. S. Department of Energy began investigating the relocation of foxes to Naval Petroleum Reserve {number_sign}1 (NPR-1) in California. The objective of the study was to develop techniques to reintroduce kit foxes onto NPR-1. Soft reintroduction was proposed, which is not immediately releasing relocated parent animals. The method involved holding relocated foxes in pens during fall and winter and then releasing foxes in spring and summer. Twelve foxes were relocated to NPR-1 and kept in captivity for 131 days before their release in 1989. Twenty-eight foxes were similarly relocated to NPR-1 in 1990. The distance between the release site and the location of death averaged 6.1 miles for adult foxes released in 1989 and 2.7 miles for adult foxes released in 1990. Distance moved was not influenced by sex or age. In 1990, the distance from the release site and the location of death averaged 1.9 miles for foxes released from pens in hilly terrain and 3.5 miles for foxes released from pens in level terrain. Annual survivorship of relocated foxes was 0.03, which was smaller than survivorship of free-ranging foxes. During the year after release, the number of days foxes survived after release averaged 31.9 and was not influenced by sex, age, or the terrain in which foxes were released. By April 30, 1992, only one released fox was still alive; radio contact with three foxes was lost. One pup reared in captivity in 1989 was found dead 17 days after its released. The ten pups reared in captivity in 1990 were found dead within 17 days after their release. Predation was the main known cause of death of all relocated foxes. Six relocated foxes survived through one breeding season and three relocated foxes survived through two breeding seasons; four of the six foxes were known to have reproduced with free-ranging foxes.

Scrivner, J.H.; O`Farrell, T.P.; Hammer, K.L.

1993-01-01

429

Summary and evaluation of the kit fox relocation program, Naval Petroleum Reserve No. 1, Kern County, California  

SciTech Connect

In 1988, the U. S. Department of Energy began investigating the relocation of foxes to Naval Petroleum Reserve [number sign]1 (NPR-1) in California. The objective of the study was to develop techniques to reintroduce kit foxes onto NPR-1. Soft reintroduction was proposed, which is not immediately releasing relocated parent animals. The method involved holding relocated foxes in pens during fall and winter and then releasing foxes in spring and summer. Twelve foxes were relocated to NPR-1 and kept in captivity for 131 days before their release in 1989. Twenty-eight foxes were similarly relocated to NPR-1 in 1990. The distance between the release site and the location of death averaged 6.1 miles for adult foxes released in 1989 and 2.7 miles for adult foxes released in 1990. Distance moved was not influenced by sex or age. In 1990, the distance from the release site and the location of death averaged 1.9 miles for foxes released from pens in hilly terrain and 3.5 miles for foxes released from pens in level terrain. Annual survivorship of relocated foxes was 0.03, which was smaller than survivorship of free-ranging foxes. During the year after release, the number of days foxes survived after release averaged 31.9 and was not influenced by sex, age, or the terrain in which foxes were released. By April 30, 1992, only one released fox was still alive; radio contact with three foxes was lost. One pup reared in captivity in 1989 was found dead 17 days after its released. The ten pups reared in captivity in 1990 were found dead within 17 days after their release. Predation was the main known cause of death of all relocated foxes. Six relocated foxes survived through one breeding season and three relocated foxes survived through two breeding seasons; four of the six foxes were known to have reproduced with free-ranging foxes.

Scrivner, J.H.; O'Farrell, T.P.; Hammer, K.L.

1993-01-01

430

Ecology of Borrelia burgdorferi in ticks (Acari: Ixodidae), rodents, and birds in the Sierra Nevada foothills, Placer County, California.  

PubMed

This study examined the prevalence of Borrelia burgdorferi Johnson, Schmid, Hyde, Steigerwalt & Brenner in host-seeking adult and nymphal Ixodes pacificus Cooley & Kohls and estimated the I. pacificus infestation and B. burgdorferi infection of rodent and avian hosts in the western Sierra Nevada foothills of northern California. Additionally, we identified species likely to participate in an enzootic cycle for B. burgdorferi in this yellow pine transition habitat. Evidence of infection with B. burgdorferi was identified in 7.3 and 5.4% of host-seeking I. pacificus adults and nymphs, respectively. Mean numbers of I. pacificus observed on rodents were 1.15 for Neotoma fuscipes Baird and 0.18 for Peromyscus spp. One of 104 ear punch tissues obtained from woodrats and none from 49 Peromyscus spp. yielded B. burgdorferi. A total of 291 collected birds representing 34 species had a mean of 0.27 I. pacificus per bird. The mean I. pacificus infestation of ground-dwelling birds was 2.5 ticks per bird. Forty-nine of 92 (53%) blood smears collected from birds were reactive to a B. burgdorferi specific antibody. This study presents the identification of a B. burgdorferi-like spirochete in birds in western North America. The tick burden and spirochete infection of birds suggests that birds may be involved in a local B. burgdorferi enzootic cycle and likely participate in the transport of ticks and spirochetes to other locations while rodents from this site do not appear to be major contributors. PMID:11126549

Wright, S A; Thompson, M A; Miller, M J; Knerl, K M; Elms, S L; Karpowicz, J C; Young, J F; Kramer, V L

2000-11-01

431

Logs and data from trenches across the Hayward Fault at Tyson's Lagoon (Tule Pond), Fremont, Alameda County, California  

USGS Publications Warehouse

INTRODUCTION The purpose of this publication is to make available detailed trench logs (sheets 1, 2), radiocarbon dates (table 1) and pollen data (fig. 1) obtained as a result of an intensive subsurface investigation of the Hayward Fault at Tyson's Lagoon (Tule Pond) from August to November 2000 (figs. 1, 2 on sheet 1). The Hayward Fault is recognized to be among the most hazardous in the United States (Working Group on California Earthquake Probabilities, 1999). This document makes available geologic evidence for historical and prehistoric surfacerupturing earthquakes that were recorded at the site. Prehistoric earthquakes deduced from geologic evidence are called paleoearthquakes. Establishing a chronology of paleoearthquakes is of immediate use in resolving the level of hazard posed by the Hayward Fault for producing large earthquakes in the future. Preliminary findings of this investigation have been presented in Lienkaemper and others (2001). A formal report on our conclusions based on these data is in preparation. The investigation at Tyson's Lagoon is ongoing, so these products should not be considered final. Lienkaemper, Dawson, and Personius interpreted the geology and logged the trenches. Seitz and Reidy performed analyses on radiocarbon and pollen samples, respectively. Schwartz led the critical-review field team. Previous trenching work was done at Tyson's Lagoon (figs. 2, 3 on sheet 1). Lienkaemper (1992) references the location of most of those trenches. The earlier trenching was generally for the evaluation of local faultrupture hazard, except for the study of Williams (1993), which was a paleoearthquake investigation. An unpublished study by J.N. Alt in 1998 (shown on our site map as trenches 98A and 98B, fig. 3, on sheet 1), also sought evidence of paleoearthquakes. Alt's study and one by Woodward-Clyde and Associates (1970; trenches 70A to 70G, fig. 3) were located south of Walnut Avenue in one of the few areas that still remain undisturbed and were, thus, useful in planning our work in 2000.

Linenkaemper, James J.; Dawson, Timothy E.; Personius, Stephen F.; Seitz, Gordon G.; Reidy, Liam M.; Schwartz, David P.

2002-01-01

432

Sharpening the Focus of Yolo County Land Use Policy  

E-print Network

Sharpening the Focus of Yolo County Land Use Policy Kurt R. Richter University of California Agricultural Issues Center October 2009 #12;Sharpening the Focus of Yolo County Land Use Policy II University of California Agricultural Issues Center #12;Sharpening the Focus of Yolo County Land Use Policy III Making

Ferrara, Katherine W.

433

Effects of limestone quarrying and cement-plant operations on runoff and sediment yields in the Upper Permanente Creek basin, Santa Clara County, California  

USGS Publications Warehouse

High sediment loads below headwater areas of the Permanente Creek drainage basin, Santa Clara County, California, have caused flood-control problems in downstream lowland areas. Measured sediment yields in Permanente Creek, which drains areas affected by limestone quarrying and cement-plant operations, were 14 times greater than yields from the West Fork Permanente Creek, which primarily drains parkland. Part of this large disparity in yields is the result of higher runoff/unit of drainage area in the Permanente Creek Basin. Results of rainfall-runoff modeling indicate that the tendency for higher runoff from Permanente Creek results from natural differences in basin physiography. Runoff during periods of high streamflow (when most sediment is transported) is dominated by subsurface flow, which is not affected by human activities. Although artificial features created by human activities seem to have had only minor effects on runoff, they apparently have had major effects on sediment availability. Artificial features accounted for 273 acres (89%) of the 307 acres of active erosional landforms mapped in 1984. Increased availability of sediment in the Permanente Creek basin appears to be indicated by elevated intercepts of sediment-transport curves. A comparison of sediment-transport curves for the West Fork Permanente Creek with similar curves for the Permanente Creek basin under natural conditions suggests that the sediment yield from Permanente Creek is about 3.5 times higher than it would be under natural basin conditions. The increased yield apparently is due to an increase in sediment availability rather than an increase in runoff. (USGS)

Nolan, K.M.; Hill, B.R.

1989-01-01

434

Environmental Impact of the Helen, Research, and Chicago Mercury Mines on Water, Sediment, and Biota in the Upper Dry Creek Watershed, Lake County, California  

USGS Publications Warehouse

The Helen, Research, and Chicago mercury (Hg) deposits are among the youngest Hg deposits in the Coast Range Hg mineral belt and are located in the southwestern part of the Clear Lake volcanic field in Lake County, California. The mine workings and tailings are located in the headwaters of Dry Creek. The Helen Hg mine is the largest mine in the watershed having produced about 7,600 flasks of Hg. The Chicago and Research Hg mines produced only a small amount of Hg, less than 30 flasks. Waste rock and tailings have eroded from the mines, and mine drainage from the Helen and Research mines contributes Hg-enriched mine wastes to the headwaters of Dry Creek and contaminate the creek further downstream. The mines are located on federal land managed by the U.S. Bureau of Land Management (USBLM). The USBLM requested that the U.S. Geological Survey (USGS) measure and characterize Hg and geochemical constituents in tailings, sediment, water, and biota at the Helen, Research, and Chicago mines and in Dry Creek. This report is made in response to the USBLM request to conduct a Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA - Removal Site Investigation (RSI). The RSI applies to removal of Hg-contaminated mine waste from the Helen, Research, and Chicago mines as a means of reducing Hg transport to Dry Creek. This report summarizes data obtained from field sampling of mine tailings, waste rock, sediment, and water at the Helen, Research, and Chicago mines on April 19, 2001, during a storm event. Further sampling of water, sediment, and biota at the Helen mine area and the upper part of Dry Creek was completed on July 15, 2003, during low-flow conditions. Our results permit a preliminary assessment of the mining sources of Hg and associated chemical constituents that could elevate levels of monomethyl Hg (MMeHg) in the water, sediment, and biota that are impacted by historic mining.

Rytuba, James J.; Hothem, Roger L.; May, Jason T.; Kim, Christopher S.; Lawler, David; Goldstein, Daniel; Brussee, Brianne E.

2009-01-01

435

Post remedial action survey report for Building 003, Santa Susana Field Laboratories, Rockwell International, Ventura County, California, October 1981; April 1982. Surplus Facilities Management Program  

SciTech Connect

Rockwell International's Santa Susana Laboratories in Ventura County, California, have been the site of numerous Federally-funded projects involving the use of radioactive materials. One such project was the System for Nuclear Auxiliary Power (SNAP) Program. Building 003 on the Santa Susana site was used in conjunction with the SNAP Program and contained a highly shielded area designed for remote manipulation of radioactive materials. Such facilities are commonly referred to as hot caves. During the SNAP Program, fuel burnup samples were analyzed and irradiation experiments were evaluated in the Building 003 hot cave. Use of the hot cave facility ended when the SNAP Program was terminated in 1973. Subsequently, the Building 003 facilities were declared excess and were decontaminaed and decommissioned during the first half of calendar year 1975. At that time, the building was given a preliminary release. In 1981, a post-remedial-action (certification) survey of Building 003 was conducted at the request of the Department of Energy. Significant levels of residual contamination were found in various parts of the building. Consequently, additional decontamination was conducted by Rockwell International. A final post-remedial-action survey was conducted during April 1982, and those areas in Building 003 that had been found contaminated in 1981 were now found to be free of detectable radioactive contamination. Sludge samples taken from the sewer sump showed elevated levels of enriched uranium contaminant. Hence, all sewer lines within Building 003 were removed. This permitted unconditional release of the building for unrestricted use. However, the sewer lines exterior to the building, which remain in place, must be considered potentially contaminated and, therefore, subject to restricted use.

Wynveen, R.A.; Smith, W.H.; Sholeen, C.M.; Justus, A.L.; Flynn, K.F.

1983-10-01