C.B. Adkins J.R. Bartolino 20120411 vector digital data Scientific Investigations Report 2012-5053 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir12-5053_BRsurf James R. Bartolino and Candice B. Adkins 2012 Scientific Investigations Report 2012–5053 Prepared in cooperation with Blaine County, City of Hailey, City of Ketchum, The Nature Conservancy, City of Sun Valley, Sun Valley Water and Sewer District, Blaine Soil Conservation District, and City of Bellevue http://pubs.usgs.gov/sir/2012/5053/ This dataset is the estimated altitude of the consolidated rock surface underlying Quaternary sediment of the Wood River Valley aquifer system. This surface is composed of the top of pre-Quaternary bedrock and Quaternary basalt, Wood River Valley, south-central Idaho. This surface was constructed using the depth of bedrock from about 1,000 well-driller reports for boreholes and about 70 Horizontal-to-Vertical Spectral Ratio (HVSR) ambient-noise measurements of the Wood River Valley aquifer system, south-central Idaho. Bedrock depths were subtracted from the altitude of land surface obtained from the 2009 1-Arc Second National Elevation Dataset and the resulting points were used to construct an estimated bedrock surface altitude with hand-drawn 100-ft contour interval. These contours were then used to create a raster surface of the estimate altitude of the bedrock surface as described in the procstep section below. This dataset was created in support of the third phase of a continuing U.S. Geological Survey (USGS) study to assess the groundwater resources of the Wood River Valley, south-central Idaho. The first phase was documented in "Water-resource trends and comparisons between partial development and October 2006 hydrologic conditions, Wood River Valley, south-central Idaho" (Skinner and others, 2007), and the second phase was documented in "Ground-water budgets for the Wood River Valley aquifer system, south-central Idaho"(Bartolino, 2009). The third phase is a description of the hydrogeologic framework of the Wood River Valley aquifer system. The Wood River Valley contains most of the population of Blaine County and the cities of Sun Valley, Ketchum, Hailey, and Bellevue. This mountain valley is underlain by the alluvial Wood River Valley aquifer system. The entire population of the area depends on groundwater for domestic supply and rapid population growth since the 1970s has caused concern about the long-term sustainability of the groundwater resource. This dataset was created to support hydrogeologic investigations in the Wood River Valley, Idaho. While the dataset was created in support of a hydrogeologic framework of the Wood River Valley aquifer system (SIR-2012-5053), the intended uses of this dataset include, but are not limited to, natural resource modeling, mapping, and visualization applications. 20120411 Publication date Complete None planned -114.586717 -114.047675 43.807490 43.297082 None hydrogeology groundwater aquifers ISO 19115 Topic Categories inlandWaters environment geoscientificInformation Geographic Names Information System Silver Creek Gannett Wood River Valley Ketchum Bellevue Picabo Idaho Sun Valley Hailey Big Wood River Blaine County Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. See access and use constraints information. James R. Bartolino US Geological Survey, Idaho Water Science Center Hydrologist (Geo) mailing address

230 Collins Road

Boise ID 83702 USA (208) 387-1392 (208) 387-1372 jrbartol@usgs.gov 8:00am-4:30pm MST Please contact thru email http://water.usgs.gov/GIS/browse/sir12-5053_BRsurf.gif Illustration of dataset GIF U.S. Geological Survey in cooperation with with Blaine County, City of Hailey, City of Ketchum, The Nature Conservancy, City of Sun Valley, Sun Valley Water and Sewer District, Blaine Soil Conservation District, and City of Bellevue. Microsoft Windows 7 Version 6.1 (Build 7600) ; ESRI ArcGIS 10.0.4.4000 Only software generated attributes are present. All attempts were made to verify 100 percent of the digital attribute data is complete and consistent. Verification was done by interactive on-screen review. The estimated bedrock surface was visually evaluated and reviewed to be hydrologically consistent and correct. Complete. U.S. Geological Survey 20120411 vector digital data http://water.usgs.gov/lookup/getspatial?sir2012_5053_AqfExt onLine 20120411 20120411 Publication date WRVAS boundary Spatial boundary limits U.S. Geological Survey 2009 raster digital data http://seamless.usgs.gov raster digital data 2009 2009 Publication date 10-m DEM attribute information 1) Point data of depth to bedrock from drillers' logs and HVSR measurements were used to hand-draw 100-ft contour intervals of the estimated bedrock surface altitude. 2) The ESRI ArcMap 10 "Topo to Raster" tool (standard settings, 0.000278 decimal degrees cell size) was used to create a raster of the estimate altitude of the bedrock surface. 3) The geodatabase raster was then clipped with the Boundary of the Wood River Valley aquifer system shapefile. 4) The clipped geodatabase raster was converted from floating point to integer with the "Int" tool. 5) The geodatabase raster was then exported to a TIFF raster file with a cell size of 0.000278 decimal degrees. U.S. Geological Survey unknown Raster Pixel 1836 1939 8.983152841195215e-009 8.983152841195215e-009 Decimal Degrees D WGS 1984 WGS 1984 6378137.0 298.257223563 sir12-5053_BRsurf Estimated altitude of bedrock surface, in feet. Range 4565 - 6795 ft. User defined U.S. Geological Survey Ask USGS – Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+sir12-5053_BRsurf See access and use constraints information. TIFF raster image PKZIP compression Winzip http://water.usgs.gov/GIS/dsdl/sir12-5053_BRsurf.zip None. This dataset is provided by USGS as a public service. 20120517 U.S. Geological Survey Ask USGS – Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time