Faunt, Claudia C. 2006 vector digital data Digital geospatial data sets for the hydrogeologic framework and transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California hfm_top Reston, Virginia U.S. Geological Survey https://water.usgs.gov/lookup/getspatial?sir045205_hfm_top Belcher, W.R. and Sweetkind, D.S. (editors) 2010 U.S. Geological Survey Professional Paper 1711 Reston, Virginia U.S. Geological Survey 6 chapters, 2 appendices, 2 plates, 403 p. https://pubs.er.usgs.gov/publication/pp1711 Belcher, W.R. (editor) 2004 U.S. Geological Survey Scientific Investigations Report 2004-5205 Reston, Virginia U.S. Geological Survey 6 chapters, 2 appendices, 2 plates, 408 p. https://pubs.usgs.gov/sir/2004/5205/ A digital three-dimensional (3D) hydrogeologic framework model (HFM) represents the geometry and extent of hydrogeologic units (HGUs) and major structures in the Death Valley regional ground-water flow system (DVRFS). The HFM altitude data represent the geometry of the HFM by defining the top of the 27 HGUs in an approximately 45,000 square-kilometer region of southern Nevada and California (see "Larger Work Citation", Chapter E). The HGUs represent principal aquifers and confining units and are integral to the development of the DVRFS transient ground- water flow model (see "Larger Work Citation", Chapter F). The DVRFS framework and transient ground-water flow models are the most recent in a number of regional-scale models developed by the U.S. Geological Survey (USGS) for the U.S. Department of Energy (DOE) to support investigations at the Nevada Test Site (NTS) and at Yucca Mountain, Nevada (see "Larger Work Citation", Chapter A, page 8). The HFM surface altitude data were used to develop input files to MODFLOW-2000, the USGS 3D finite-difference code used to simulate ground-water flow in the DVRFS. The HFM surface altitide data set is one of many layers in a geospatial data base supporting the USGS DVRFS project. During this 5-year (1998-2004) project the USGS, in cooperation with DOE and other Federal, State, and local agencies, developed this geospatial data base for a regional- scale, 3D hydrogeologic framework model (HFM) and a ground-water flow model. The models are intended to address water-resource issues and the potential movement of radioactive material from the Nevada Test Site and the proposed high-level nuclear waste repository at Yucca Mountain, Nevada. Data from two previous ground-water flow models of the greater Death Valley region (see "Larger Work Citation", Chapter A, p. 7) were the foundation of the DVRFS geospatial data base. Those and other data were reexamined through a series of regional-scale hydrologic investigations to provide updated and spatially consistent interpretations for the DVRFS study. In some cases, new data were collected to augment the existing information. Data compiled from the studies include natural ground-water discharge occurring through evapotranspiration and spring flow; ground-water pumping for the period 1913-98; ground-water recharge simulated as net infiltration; ground-water inflow and outflow at lateral model boundaries; hydraulic conductivity and its relation to depth and other rock properties; and the estimation of water levels representative of prepumped and pumped conditions in the region. Digital elevation models, geologic maps, borehole information, cross sections, and other 3D models were used to develop the HFM which represents the geometry of 27 hydrogeologic units and structural features. The resulting geospatial data base supports characterization and conceptualization of the DVRFS, construction of 3D hydrogeologic framework and ground-water flow models, and visualization of analysis and model results. 2006 publication date Complete None planned -117.718697 -114.981308 38.120690 35.481569 USGS Thesaurus Death Valley regional ground-water flow system flow model ground water hydrogeologic framework model hydrogeology hydrology MODFLOW-2000 transient ground-water model USGS Metadata Identifier USGS:625f86d8-e628-4cf0-919c-d6e3e0414246 U.S. Board of Geographic Names (BGN) and Geographic Names Information System (GNIS) Amargosa Desert Ash Meadows California California Valley Chicago Valley China Ranch Clark County Clayton Valley Coal Valley Death Valley Esmeralda County Eureka Valley Franklin Lake Franklin Well Garden Valley Inyo County Kern County Las Vegas Valley Lincoln County Mesquite Valley Mineral County Mono County Nevada Nevada Test Site Nye County Oasis Valley Owlshead Mountains Pahranagat Range Pahrump Valley Panamint Range Penoyer Valley Railroad Valley Resting Spring Saline Valley San Bernadino County Sarcobatus Flat Sheep Range Shoshone Silurian Valley southern Nevada Spring Mountains Stewart Valley Stone Cabin Valley Tecopa Yucca Mountain None Data have been checked to ensure the accuracy of the data. If any errors are detected, please notify the originating office. The U.S. Geological Survey strongly recommends that careful attention be paid to the metadata file associated with these data. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcGIS format, this metadata file may include some ArcGIS-specific terminology. U.S. Geological Survey Claudia Faunt mailing and physical address

California Water Science Center

San Diego Projects Office

4165 Spruance Road, Suite 200

San Diego California 92101 USA (619) 225-6142 (619) 225-6101 ccfaunt@usgs.gov https://water.usgs.gov/GIS/browse/sir045205_hfm_top.jpg Illlustration of data set jpg Spatial data sets supporting the Death Valley regional ground-water flow system (DVRFS) project were developed in cooperation with the U.S. Department of Energy (DOE) National Nuclear Security Administration/Nevada Site Office (NNSA/NSO) Underground Test Area (UGTA) project of the Office of Environmental Management, the NNSA/NSO Hydrologic Resource Management Program (HRMP), the Office of Civilian Radioactive Waste Management (OCRWM) Yucca Mountain Project (YMP), the NNSA/NSO Maintenance of Test Capability (MTC) program, and the National Park Service (NPS). Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 Attributes added by the GIS and the data-set author were checked by inspection using a GIS. In addition, attributes were checked and evaluated as part of the review process associated with the publication of the source report. Lines join at endpoints to completely enclose defined areas. Lines do not intersect, and no duplicate line features exist. All nodes are represented by a single coordinate pair which indicates the beginning or end of a line. The polygon features in this data set are computer-generated and considered generally representative of the DVRFS hydrogeologic framework. The data set is complete and is not anticipated to change. Horizontal positional accuracy of line features in the data set was tested by visually comparing to digital source maps using a GIS system. The vertical accuracy of the surface altitudes of HGUs varies spatially and is dependent on the type of source data used. Where the surface altitude of hydrogeologic units was estimated from Digital Elevation Model (DEM) data, an absolute vertical error of 30 meters is expected. The expected vertical accuracy of altitudes estimated from lithologic well data is 1 meter. Altitudes inferred from 1:100,000 to 1:250,000-scale geologic cross-section data have an estimated vertical accuracy of about 100 meters. Faunt, C.C. Sweetkind, D.S. Belcher, W.R. 2004 map Chapter E Belcher, W.R., (ed.) 2004 document U.S. Geological Survey Scientific Investigations Report 2004-5205 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/pubs/sir/2004/5205/ 250,000 online 2004 publication date Faunt and others (2004e) Digital HFM model used to export HGU surface-altitude arrays. Faunt, C.C. Blainey, J.B. Hill, M.C. D’Agnese, F.A. O’Brien, G.M. 2004 Chapter F Belcher, W.R., (ed.) 2004 document U.S. Geological Survey Scientific Investigations Report 2004-5205 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/pubs/sir/2004/5205/ 250,000 online 2004 publication date Faunt and others (2004f) Digital HFM model used to export HGU thickness arrays. The 3D HFM was constructed for the DVRFS by compiling a variety of data sets including elevation models, geologic maps, borehole lithologic logs, cross sections, and digital geologic models. Source data were typically 1:100,000 to 1:250,000-scale, or were simplified to represent that scale range. While a variety of software packages were used for model development, the HFM itself was constructed using Landmark Graphics Stratigraphic Geocellular Modeler (SGM or Stratamodel). Faunt and others (2004e) present a full discussion of the HFM construction in Chapter E of the "Larger Work Citation". Ultimately, raster arrays representing HGU geometries were converted from Stratamodel to ARC/INFO raster arrays (Faunt and others, 2004f). The ARC/INFO raster arrays were then converted to a single polygon layer represented by this data set. Faunt and others (2004e) Faunt and others (2004f) 2006 Vector G-polygon 31041 Universal Transverse Mercator 11 0.999600 -117.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000512 0.000512 meters North American Datum of 1927 Clarke 1866 6378206.400000 294.978698 Hydrogeologic unit (HGU) Rocks and deposits of considerable lateral extent and distinct hydrologic properties that form the hydrostratigraphic framework of a ground-water flow system Author (Point of Contact) FID Internal feature number. Environmental Systems Research Institute, Inc. (ESRI) Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. COLUMN Model-grid column number Author (Point of Contact) 1 160 ROW Model-grid row number Author (Point of Contact) 1 194 BRU Altitude of the top of the Belted Range unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 CFBCU Altitude of the top of the Crater Flat-Bullfrog confining unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 CFPPA Altitude of the Crater Flat-Prow Pass aquifer Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 CFTA Altitude of the top of the Crater Flat-Tram aquifer Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 CHVU Altitude of the top of the Calico Hills volcanic-rock unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 ICU Altitude of the top of the intrusive-rock confining unit Author (Point of Contact) -4000 2672.0 meters (North American Vertical Datum of 1988) 1 LA Altitude of the top of the limestone aquifer Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 LCA_T1 Altitude of the top of the lower carbonate-rock aquifer (thrusted) Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 LCA Altitude of the top of the lower carbonate-rock aquifer Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 LCCU_T1 Altitude of the top of the lower clastic-rock confining unit (thrusted) Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 LCCU Altitude of the top of the lower clastic-rock confining unit Author (Point of Contact) -4000 2969 meters (North American Vertical Datum of 1988) 1 LFU Altitude of the top of the lava-flow unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 OAA Altitude of the top of the older alluvial aquifer Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 OACU Altitude of the top of the older alluvial confining unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 OVU Altitude of the top of the older volcanic-rock unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 PVA Altitude of the top of the Paintbrush volcanic-rock aquifer Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 SCU Altitude of the top of the sedimentary-rock confining unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 TMVA Altitude of the top of the Thirsty Canyon-Timber Mountain volcanic-rock aquifer Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 UCA Altitude of the top of the upper carbonate-rock aquifer Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 UCCU Altitude of the top of the upper clastic-rock confining unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 VSU_LOW Altitude of the top of the lower volcanic- and sedimentary-rock unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 VSU_UP Altitude of the top of the upper volcanic- and sedimentary-rock unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 WVU Altitude of the top of the Wahmonie volcanic-rock unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 XCU Altitude of the top of the crystalline-rock confining unit Author (Point of Contact) -4000 2788 meters (North American Vertical Datum of 1988) 1 YAA Altitude of the top of the younger alluvial aquifer Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 YACU Altitude of the top of the younger alluvial confining unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 YVU Altitude of the top of the younger volcanic-rock unit Author (Point of Contact) -4000 3324 meters (North American Vertical Datum of 1988) 1 ACTIVE Numerical model area (cell) where calculations are made Author (Point of Contact) 0 Inactive cell Metadata author 1 Active cell Metadata author Each polygon feature has 32 attributes. Two attributes are automatically generated by the GIS (FID, Shape) for internal software purposes. The remaining attributes were assigned by the author (Citation Originator) for analysis and (or) descriptive purposes. Where recorded, mean and standard deviation values have been rounded to the nearest meter. - U.S. Geological Survey Michael Ierardi mailing and physical address

445 National Center

Reston VA 20192 USA 1-888-275-8747 mierardi@usgs.gov Contact via email or phone. Digital geospatial data sets for the transient ground-water flow model and hydrogeologic framework model, Death Valley regional ground-water flow system, Nevada and California Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. These data should be directly acquired from a U.S. Geological Survey server, and not indirectly through other sources that may have altered the data in some way. Shapefile 1.0 Unzip 1.559 Megabytes https://water.usgs.gov/GIS/dsdl/hfm_top.zip None 20201117 U.S. Geological Survey mailing address

445 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998