C.B. Adkins J.R. Bartolino 20120814 raster image Scientific Investigations Report 2012-5053 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir12-5053_FineGrn James R. Bartolino and Candice B. Adkins 20120101 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 top of the uppermost fine-grained sediment within the Wood River Valley aquifer system. This map was compiled by describing the estimated altitude of the top of the fine-grained sediment from about 160 well-driller reports for boreholes drilled within the area of the approximate extent of the confined aquifer. A surface was generated using kriging of the point data. 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. 20120814 Publication date Complete None planned -114.36331 -114.047502 43.375864 43.296912 None groundwater hydrogeology aquifers ISO 19115 Topic Categories geoscientificInformation inlandWaters environment Geographic Names Information System Silver Creek Blaine County Idaho Wood River Valley Ketchum Hailey Bellevue Picabo Gannett Sun Valley Big Wood River 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. US Geological Survey, Idaho Water Science Center James R. Bartolino Hydrologist (Geo) mailing

230 Collins Road

Boise ID 83702 US (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_FineGrn.pdf Illustration of dataset pdf 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 fine-grained sediment 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?sir12-5053_AqfExt onLine 20120411 20120411 Publication date WRVAS boundary Spatial boundary limits U.S. Geological Survey 20090101 raster digital data http://viewer.nationalmap.gov/viewer/ None 20090101 20090101 Publication date 10-m DEM attribute information 1) Point data was compiled describing the estimated altitude of the top of the fine-grained sediment from about 160 well-driller reports for boreholes drilled within the area of the approximate extent of the confined aquifer. 2) The ESRI ArcMap 10 "Kriging" tool was used to create a raster of the surface represented by the points (settings: ordinary kriging, a spherical semivariogram model, a variable search radius, and the 80 nearest points). The kriged surface did not extend to the full extent of the aquifer boundary. 3) The ESRI ArcMap 10 "Contour" tool was used to generate contours of the kriged surface and the contours were manually extended beyond the aquifer boundary. 4) The ESRI ArcMap 10 "Topo to Raster" tool (standard settings, 0.000278 decimal degrees, 1 arc second, or 30 m) cell size) was used to create a raster of the estimated altitude of the bedrock surface. 3) The raster was then clipped with the Boundary of the Wood River Valley aquifer system shapefile. 6) The clipped raster was converted from floating point to integer with the "Int" tool. U.S. Geological Survey unknown Raster Pixel 284 1136 8.9831528411952133e-009 8.9831528411952133e-009 Decimal Degrees D WGS 1984 WGS 1984 6378137.0 298.257223563 sir12-5053_FineGrn.tif.vat Estimated altitude of the top of the uppermost fine-grained sediment, in feet. Range 4960-4821 ft. User defined VALUE The estimated altitude of the top of the uppermost fine-grained sediment within the Wood River Valley aquifer system. User defined Range maximum: 4960 ft. Range minimum: 4821 ft. COUNT Number of raster cells with the given VALUE. ESRI Sequential unique whole numbers that are automatically generated. OID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. U.S. Geological Survey Ask USGS – Water Webserver Team mailing

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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_FineGrn See access and use constraints information. TIFF raster image PKZIP compression Winzip http://water.usgs.gov/GIS/dsdl/sir12-5053_FineGrn.zip None. This dataset is provided by USGS as a public service. 20120606 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