Rose L. Medina Douglas K. Maurer Thomas J. Lopes 2004 vector digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?nv_hydgeolnv_p Douglas K. Maurer Thomas J. Lopes Rose L. Medina J. LaRue Smith 2004 document U.S. Geological Survey Scientific Investigations Report 2004-5131 Reston, VA U.S. Geological Survey http://pubs.water.usgs.gov/sir2004-5131 hydgeolnv_p This data set consists of hydrogeology for the State of Nevada. Consolidated rocks and unconsolidated sediments are the two major hydrogeologic units. Consolidated rocks are subdivided into 8 hydrogeologic units: (1) carbonate rocks, Quaternary to Tertiary-age; (2) basaltic, (3) rhyolitic, and (4) andesitic volcanic flows; (5) volcanic breccias, tuffs, and volcanic rocks older than Tertiary-age; (6) intrusive and metamorphic rocks; (7) consolidated and semi-consolidated tuffaceous rocks and sediments; and (8) clastic rocks consisting of sandstone and siltstone. Unconsolidated sediments are subdivided into 4 hydrogeologic units: 1) alluvial slopes, (2) valley floors, (3) fluvial deposits, and (4) playas. In addition, soil permeability is provided and grouped into five descriptive categories ranging from very high to very low, which generally correspond to mapped geomorphic features such as playas and alluvial slopes. The geologic map of Nevada (Stewart and Carlson, 1978), published at a scale of 1:500,000, is the primary source of lithology used to delineate hydrogeologic units, enhanced with elevation and hydrologic data, and supplemented with Landsat Thematic Mapper imagery (Maurer and others, 2004). Cited References Maurer, D.K., Lopes, T.J., Medina, R.L., and Smith, J.L., 2004, Hydrogeology and hydrologic landscape regions of Nevada, U.S. Geological Survey Scientific Investigations Report 2004-5131, 35 p. Stewart, J.H., and Carlson, J.E., 1978, Geologic map of Nevada: U.S. Geological Survey, prepared in cooperation with the Nevada Bureau of Mines and Geology, 1:500,000 scale, 2 sheets. This data set was created as part of a U.S. Geological Survey study, done in cooperation with the Nevada Division of Environmental Protection, to evaluate the susceptibility and vulnerability of ground water to anthropogenic contamination. A basic part of evaluating ground water is characterizing the hydrogeology of aquifer systems including the lithology and soil permeability, which partly control the susceptibility of ground water to contamination (Maurer and others, 2004). The intended uses of this data set include, but are not limited to, natural resource modeling, mapping, and visualization applications. Cited Reference Maurer, D.K., Lopes, T.J., Medina, R.L., and Smith, J.L., 2004, Hydrogeology and hydrologic landscape regions of Nevada, U.S. Geological Survey Scientific Investigations Report 2004-5131, 35 p. en 1978 1986 1994 1999 publication date of the source data Complete None planned -120.136618 -113.793799 42.038413 34.997038 240193.656250 765578.500000 3876386.750000 4653828.500000 none hydrogeology geology permeability none Nevada Great Basin none The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as ArcGIS format, this metadata file may include some ArcGIS-specific terminology. Acknowledgment of the U.S. Geological Survey and the Nevada Division of Environmental Protection would be appreciated in products derived from these data. U.S. Geological Survey Rose L. Medina Physical Scientist mailing and physical address

333 W. Nye Lane

Carson City NV 89706 USA (775) 887-7620 (775) 887-7629 rlmedina@usgs.gov Compilation of this data set and the associated metadata was done in cooperation with the Nevada Division of Environmental Protection. Technical review of this data set and metadata was provided by Toby Welborn, Brian D. Reece, and Douglas O. Shipley of the U.S. Geological Survey. ESRI ArcCatalog 8.3.0.800 J.H. Stewart J.E. Carlson G.L. Raines K.A. Conners L.A. Moyer R.J. Miller 2003 version 3.0 vector digital data Open-File Report 03-66 Menlo Park, CA U.S. Geological Survey J.H. Stewart J.E. Carlson 1978 map Reston, VA U.S. Geological Survey, Nevada Bureau of Mines and Geology ArcInfo Coverage All attempts were made to verify 100 percent of the digital attribute data. Verification was done by interactive on-screen review. Frequency tests were run on the polygon attributes to check that no features were unlabeled, misspelled, or inconsistent. Corrections were made until one on-screen review determined 100 percent of the digital attribute data matched the master set of attributes as described in the Entity_and_Attribute section. The logical consistency topologically is clean. Polygon topology is present. Using ArcGIS Workstation commands and routines, all polygons were checked for closure, missing label points, multiple label points, sliver polygons, and duplicate features. Complete for Nevada. All attempts were made to verify 100 percent of the digital spatial data. Verification was done by on-screen review. 260 meters This data set was compiled from multiple sources and its horizontal accuracy is dependent on the accuracy of the source data sets. In addition, errors resulting from the quality of the source map, the automation process, and the scale resolution can impact the accuracy of the data. The inherent error of the hydrologic data, which is based on a 1:100,000-scale map, is approximately 52 meters and of the geologic data, which is based on a 1:500,000-scale map, is approximately 253 meters according to the National Map Accuracy Standards of 1947. The elevation data is 30-meter resolution. The horizontal error for the entire data set achieved by combining these three products is equivalent to the error of the 1:500,000-scale product and is deductively estimated at 260 meters. It can be more specifically deduced that the horizontal error for the consolidated units, based on 1:500,000-scale map, can be deductively estimated at 253 meters. The horizontal error for the unconsolidated units, except the playas, can be deductively estimated at 52 meters. G.L. Raines D.L. Sawatzky K.A. Conners 1996 vector digital data Digital Data Series DDS-41 Washington D.C. U.S. Geological Survey This is the second digital version of the Stewart and Carlson geologic map of Nevada and has since been superceded by a third digital version published as U.S. Geological Survey report OFR 03-66 (see Cross References). 500,000 CD-ROM 1978 publication date of Geologic Map of Nevada by Stewart and Carlson digital Stewart and Carlson geology spatial and attribute information U.S. Geological Survey unknown vector digital data URL accessed July 29, 2004. http://earthexplorer.usgs.gov 100,000 CD-ROM unknown publication date hydrology DLG spatial information U.S. Geological Survey 1999 raster digital data URL accessed July 29, 2004. http://gisdata.usgs.gov/NED/ CD-ROM unknown publication date of source DEMs NED spatial information G.E. Schwarz R.B. Alexander 19950901 1.1 vector digital data URL accessed July 29, 2004. http://water.usgs.gov/lookup/getspatial?ussoils 250,000 online 1994 publication date of original STATSGO State Soil Survey Geographic Data Base USSOILS spatial and attribute information U.S. Geological Survey, EROS Data Center 2000 remote-sensing image URL accessed July 29, 2004. http://earthexplorer.usgs.gov/ CD-ROM 200004 200006 ground condition Landsat imagery spatial information General process overview: For the unconsolidated units, the study required the delineation of fluvial deposits, playas, valley floor, and alluvial slope. Except for the playas, these other unconsolidated sediments were not definable from the Stewart and Carlson geologic units. It was determined that the unconsolidated sediment boundary, as defined by the Stewart and Carlson geologic units Qa, Qls, Qm, Qtoa, and Qp, would be maintained. All geologic units within this unconsolidated sediment boundary would be erased and replaced with alluvial slope and valley floor units. The playas, Qp, from Stewart and Carlson would be superimposed on the alluvial slope and valley floor hydrogeologic units. Finally, the fluvial deposits would then be superimposed on all hydrogeolgic units, thereby modifying the consolidated/unconsolidated boundary as defined by the Stewart and Carlson geologic units. Finally, generalized soil permeability information would be added to the final data set. 200207-200406 Geologic units from the digital Stewart and Carlson geology were grouped into hydrogeologic units and then classified as consolidated rock or unconsolidated sediment; see Entity and Attribute section for attribute value details. The attributes HYDGEOL, HYDGEOL-DESC, and CONSOL were added to the polygon attribute table and populated. The unconsolidated sediments were defined from the geologic units Qa, Qls, Qm, Qtoa, and Qp. The remaining geologic units were maintained and defined as consolidated rocks, excluding water. 200207 It was decided to maintain the unconsolidated sediment boundary defined by the Stewart and Carlson geologic units Qa, Qls, Qm, Qtoa, and Qp, but modify the lines within the boundary. 1. The unconsolidated sediments were extracted from the digital Stewart and Carlson geology using the ArcGIS Workstation command RESELECT based on the attribute CONSOL = 'U' to create the interim data set geol500un. 2. The individual geologic units within the unconsolidated sediments were erased using the command DISSOLVE on the attribute CONSOL to create the interim data set geolun_dis. 200207 Valley floor features were first defined using a 3 percent elevation slope break and then manually refined. 1. Cells with slopes less than 3 percent were distinguished from the NED by determining percent slope using the ArcGIS Workstation SLOPE function. 2. Slopes less than or equal to 3 percent were grouped as one group and slopes greater than 3 percent were grouped as another group using the RECLASS function. 3. A line was digitized, on-screen, around the areas with slopes less than or equal to 3 percent slope which represent a first approximation of valley floor. 4. The line was overlain on the Landsat imagery for refinement and verification. 5. The valley floor data set was converted from a shapefile to the coverage vf_p_or. Using the ArcGIS Workstation ArcEdit module and the command CLEAN with a fuzzy tolerance of 0.001, the valley floor data set (vf_p_or) was topologically cleaned and polygon topology was established. 6. The attribute VF was added to the valley floor data set (vf_p_or) and populated with 'Y' for those features considered to be valley floor and 'N' for everything else (island polygons). 7. Using the command IDENTITY, the valley floor data set (vf_p_or) was clipped to the unconsolidated sediment boundary (geolun_dis) and attributed as unconsolidated sediments to produce the interim data set vf_p_id. Syntax: identity geolun_dis vf_p_or vf_p_id poly .001 8. The attribute DIS-CODE was added to vf_p_id and populated with 'Y' where CONSOL = 'U' and VF = 'Y'. 9. Using the command DISSOLVE based on the attribute DIS-CODE features were normalized to create the interim data set vf_p. This data set was a topologically clean valley floor delineation contained within the unconsolidated sediment boundary. 200207 Define the hydrogeologic units valley floor and alluvial slope within the unconsolidated boundary and generate final hydrogeologic data set. 1. The unconsolidated sediment boundary data set with the valley floor data set was updated using the ArcGIS Workstation command UPDATE to create the interim data set as_vf_p. Syntax: update geolun_dis vf_p as_vf_p poly 0.001. 2. Any features within the unconsolidated sediment boundary and not valley floor were considered alluvial slope. The attribute HYDGEOL2 was added to code features as alluvial slope, 'Qas', or valley floor, 'Qf': For features where VF= 'Y', HYDGEOL2 = 'Qf'; For features where CONSOL = 'U' and VF not equal 'Y', HYDGEOL2 = 'Qas'. 3. The consolidated rocks were extracted from the digital Stewart and Carlson geology using the command RESELECT based on the attribute CONSOL = 'C' to create the interim data set geol500con. 4. The consolidated rock data set (geol500con) was merged with the newly defined unconsolidated sediments using the command UNION to create the hydrogeology data set hydgeol_p_or. 5. HYDGEOL and HYDGEOL-DESC were populated, for valley floor and alluvial slope features, based on the attribute HYDGEOL2. 6. Extraneous items carried over from overlay processes were dropped. 7. Using various commands, polygon attributes were checked for features that were unlabeled, misspelled, or inconsistent. 200208 Fluvial deposits were defined from selected hydrologic features then overlain on and superimposed on all hydrogeologic units. 1. The line features from the 1:100,000-scale hydrology DLGs were overlain on Landsat imagery and stream segments corresponding to active stream channels were selected to create the interim data set hydro100_sel. 2. The attribute ALLUVIUM_M was added and populated with the measured width, in meters, of the active stream channel based on the Landsat imagery. 3. The active stream channels (hydro100_sel) were buffered using the ArcGIS Workstation command BUFFER on the attribute ALLUVIUM_M to create the interim data set fluvial_p. Syntax: buffer hydro100_sel fluvial_p ALLUVIUM_M # # 4. The attribute HYDGEOL2 was added and fluvial deposits were populated as 'Qflv'. 5. Merged the fluvial deposits with the hydrogeology using the command UNION to create the data set hydgeol_p_new. Syntax: union hydgeol_p_or fluvial_p hydgeol_p_new 0.001 6. For features where HYDGEOL2 = 'Qflv', the attributes were updated as follows: HYDGEOL = 'Qflv', HYDGEOL-DESC = 'Fluvial deposit', and CONSOL = 'U'. 7. Extraneous attributes carried over from overlay processes were dropped. 8. Using various commands, polygon attributes were checked for features that were unlabeled, misspelled, or inconsistent. 9. Using the command DISSOLVE, with the #ALL option, features were normalized to create the interim data set hydgeolnw_dis. 10. The fluvial deposits extended beyond the original extent of the hydrogeology, so the command CLIP was used to clip to the original extent. 11. Using various commands, polygon attributes were checked for features that were unlabeled, misspelled, or inconsistent. 200210-200304 The decision was then made to add the playas from the Stewart and Carlson geology map. The fluvial deposits would then be superimposed on all hydrogeolgic units. 1. The fluvial deposits were extracted from the hydrogeology using the ArcGIS Workstation command RESELECT based on the attribute HYDGEOL = 'Qflv' to create the interim data set fluv_res. 2. The playas were extracted from the digital Stewart and Carlson geology using the command RESELECT based on the attribute GEOL = 'Qp' to create the interim data set playa_res. 3. The attribute PLAYA was added to playa_res. Where GEOL = 'Qp', populated PLAYA = 'Y'. 4. The fluvial deposits and the playas were merged using the command UNION to create the interim data set flv_p_u. Syntax: union fluv_res playa_res flv_p_u 0.001 5. Extraneous items carried over from overlay process were dropped. 6. For features where PLAYA = 'Y' and HYDGEOL not equal 'Qflv', the attributes were updated as follows: HYDGEOL = 'Qp', HYDGEOL-DESC = 'Playa', and CONSOL = 'U'. 7. The attribute PLAYA was dropped from the flv_p_u ploygon attribute table. 8. The attributes GEOL, HYDGEOL, HYDGEOL-DESC, and CONSOL were renamed as GEOL2, HYDGEOL2, HYDGEOL-DESC2, and CONSOL2. This was done for error-checking purposes so that when merged back with the hydrogeology, the original attributes would not be overwritten. 9. The fluvial deposits and playa data set (flv_p_u) were merged with the hydrogeology data set using the command UNION to create the interim data set hg_flv_p_u. Syntax: union hydgeol_p fluv_p_u hg_flv_p_u 0.001 10. For features where HYDGEOL2 = 'Qp', HYDGEOL was updated to 'Qp' and HYDGEOL-DESC to 'Playa'. Double checked where HYDGEOL2 = 'Qflv', HYDGEOl was also 'Qflv'. Zero features were found where this was not true as the fluvial had not changed. 11. Extraneous attributes carried over from overlay process were dropped. 12. Using various commands, polygon attributes were checked for features that were unlabeled, misspelled, or inconsistent. 13. Using the command DISSOLVE, with the #ALL option, features were normalized to create the interim data set hydgeol_p. 200309 It was then decided to add permeability information to the hydrogeology. 1. The attribute PERM-GRP was added to the USSOILS data set. 2. Using ArcMap, the USSOILS attribute table was joined with its supplied data table based on the attribute MUID. 3. The attribute PERM-GRP was populated with a generalized permeability group name based on the value of the attribute PERM in the related USSOILS data table; see Entity_and_Attribute section for attribute value details. 4. Using the ArcGIS Workstation command IDENTITY, the hydrogeology (hydgeol_p) and the USSOILS data set (soil250nq) were unioned and clipped to the extent of the hydrogeology (hydgeol_p) data set. This resulted in the hydrogeology features attributed with a permeability group value to produce the interim data set hydgeol_id. Syntax: identity hydgeol_p soil250nq hydgeol_id poly .001 5. Extraneous attributes carried over from overlay process were dropped. 6. The hydrogeology and the USSOILS data sets were mapped to two different versions of the State line. The hydrogeology State boundary took precedence during the identity, and as a result, sliver polygons were produced along the State line with no permeability information. For those features, PERM-GRP was updated from blank to 'No Value'. 7. Using various commands, polygon attributes were checked for features that were unlabeled, misspelled, or inconsistent. 8. The existing hydrogeology was renamed from hydgeol_p to hydgeol_p_or2. 9. Using the command DISSOLVE, with the #ALL option, features were normalized to remove unnecessary USSOILS lines to create the final hydrogeology data set hydgeolnv_p. 200309 QA/QC procedures were performed. 1. Using ArcGIS Workstation, including the command LABELERRORS and the node error, arc dangle, and intersect environment, polygons were checked for closure, missing or multiple labels, sliver polygons, and duplicates. 2. Using the command CENTROIDLABEL, labels were centered within the respective polygon. 3. For polygons, the attribute HYDGEOLNV_P-ID was calculated to be a unique sequential integer equal to HYDGEOLNV_P# - 1. The attributes were checked for unlabeled, misspelled, or inconsistent feature labels. 4. Polygon topology was built using the command CLEAN with the fuzzy tolerance = 0.001 and dangle = 0.01. 200405-06 Metadata structured and validated using metadata tools, mp and cns, developed by Peter Schweitzer, U.S. Geological Survey. 200406 The hydraulic conductivity range values for the hydrogeolic units were added. 1. The attribute HHCON was added to the polygon attribute table and populated; see Entity_and_Attribute section for attribute value details. 2. The attributes were checked for unlabeled, misspelled, or inconsistent feature labels. 3. The metadata was updated to reflect this addition. 200427 Vector Simple FALSE 0 TRUE FALSE coordinate pair 0.005657 0.005657 meters North American Datum of 1927 Clarke 1866 6378206.400000 294.978698 GCS_North_American_1927 NAD_1927_UTM_Zone_11N USGS_HydroGeology polygon attribute table ESRI Feature Class 0 OBJECTID OBJECTID OID 4 10 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. DBO.USGS_HydroGeology.AREA DBO.USGS_HydroGeology.AREA Double 8 38 8 Shape Feature geometry. ESRI Coordinates defining the features. Shape Geometry 8 0 0 AREA Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. 19 18 Double AREA 0 0 GEOL Abbreviated geologic formation Nevada Bureau of Mines and Geology (NBMG) Abbreviated geologic formation name GEOL 7 7 String 0 0 HYDGEOL Hydrogeologic formation, abbreviated user-defined And Andesitic Volcanic Flows user-defined Bas Basaltic Volcanic Flows user-defined Brec/Tuff/Old V Volcanic Breccias/Welded Tuffs/Old Volcanics user-defined Carb-Clas/Carb Carbonate Rocks and Mixture of Clastic and Carbonate Rocks user-defined Clas/Sand/Silt Clastic Sandstones and Siltstones user-defined Int Intrusive and Metamorphic Rocks user-defined Qas Alluvial Slope user-defined Qf Valley Floor user-defined Qflv Fluvial Deposits user-defined Qp Playa user-defined Rhy Rhyolitic Volcanic Flows user-defined Ts Tertiary Fine-Grained Semiconsolidated Sediments user-defined Water Water user-defined 15 15 String HYDGEOL 0 0 HYDGEOL_DE HYDGEOL_DE String 80 0 0 CONSOL Whether a feature is consolidated rock, unconsolidated sediment, or water. user-defined C consolidated rock user-defined U unconsolidated sediment user-defined W water user-defined 1 1 String CONSOL 0 0 PERM_GRP PERM_GRP String 15 0 0 HHCON Range in horizontal hydraulic conductivity (ft/day) user-defined 3x10-5 to 3,300 0.00003 <= HHCON (ft/day) <= 3,300 user-defined 2x10-4 to 1,300 .0002 <= HHCON (ft/day) <= 1,300 user-defined 2x10-5 to 260 0.00002 <= HHCON (ft/day) <= 260 user-defined 2x10-4 to 60 0.0002 <= HHCON (ft/day) <= 60 user-defined 3x10-7 to 600 0.0000003 <= HHCON (ft/day) <= 600 user-defined 7x10-8 to 30 0.00000007 <= HHCON (ft/day) <= 30 user-defined 2x10-4 to 20 0.0002 <= HHCON (ft/day) <= 20 user-defined 2x10-9 to 18 0.000000002 <= HHCON (ft/day) <= 18 user-defined 4 to 2,200 4 <= HHCON (ft/day) <= 2,200 user-defined 2x10-4 to 150 0.0002 <= HHCON (ft/day) <= 150 user-defined 2 to 90 2 <= HHCON (ft/day) <= 90 user-defined 3x10-5 to 2 0.00003 <= HHCON (ft/day) <= 2 user-defined NA Not applicable user-defined 15 15 String HHCON 0 0 Shape.STArea() Shape.STArea() Double 0 0 0 Shape.STLength() Shape.STLength() Double 0 0 0 AREA_MI AREA_MI Double 8 38 8 >HYDGEOLNV_P.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 HYDGEOLNV_P# 4 5 B - > 21 HYDGEOLNV_P-ID 4 5 B - > 25 GEOL 7 7 C - FORMATION > 32 HYDGEOL 15 15 C - > 47 HYDGEOL-DESC 80 80 C - > 127 CONSOL 1 1 C - > 128 PERM-GRP 15 15 C - > 143 HHCON 15 15 C - > 158 AREA-MI 4 12 F 2 GEOL is the abbreviated geologic formation from the digital Stewart and Carlson geology and is only populated for the consolidated hydrogeologic units, water and playas. HYDGEOL is the abbreviated hydrogeologic unit. HYDGEOL-DESC iss the long name of the hydrogeologic unit. CONSOL is whether the hydrogeologic unit is considered consolidated rock, unconsolidated sediment, or water. >Table correlating the attributes GEOL, HYDGEOL, HYDGEOL-DESC, >and CONSOL. >[S&C, digital Stewart and Carlson geologic unit (GEOL);*, The >Stewart and Carlson geologic units Qa, Qls, Qm, Qtoa, and Qp >combined, define the outer boundary of these units.] >=================================================================== >HYDGEOL HYDGEOL-DESC Source >------------------------------------------------------------------- >U (Unconsolidated sediments) >------------------------------------------------------------------- >Qflv* Fluvial Deposits hydrology DLG >Qp* Playa S&C: Qp >Qf* Valley Floor <3 percent slope, generally >Qas* Alluvial Slope >3 percent slope, generally >------------------------------------------------------------------- >C (Consolidated rocks) >------------------------------------------------------------------- >Bas Basaltic Volcanic Flows S&C: QTb, Tb, > Tba, Tbg >Rhy Rhyolitic Volcanic Flows S&C: QTr, Tr1, > Tr2, Tr3 >And Andesitic Volcanic Flows S&C: QTa, Ta1, > Ta2, Ta3 >Brec/Tuff/Old V Volcanic Breccias/ S&C: Jv, Msv, > Welded Tuffs/Old Volcanics Tbr, Tob, > Trt, TRk, > TRPvs, Tt1, > Tt2, Tt3, > Tts, >Carb-Clas/Carb Carbonate Rocks and Mixture S&C: Cc, DCc, > of Clastic and Carbonate Dc, Dt, > Rocks Mc, MDmc, > MDs, Ml, > Oc, OCc, > OCt, Ot, > Pc, Pc+, > Pcd, PMc, > PPa, PPc, > PPcd, Psc, > SOc, Sc, > St, TRc >Ts Tertiary Fine-Grained S&C: QTs, Ths, > Semiconsolidated Sediments TKsu, Ts1, > Ts2, Ts3 >Clas/Sand/Silt Clastic Sandstones and S&C: Ch, Csc, > Siltstones Css, CZq, > CZs, Ct, > DCsv, Ds, > Dsl, Jd, > Jgb, JPu, > JTRa, JTRs, > Ks, Os, > Osv, PMh, > Se, Ss, > TKs, TRch, > TRmt, TRPd, > TRPs, Zqs, > Zw >Int Intrusive and Metamorphic S&C: Jgr, JTRsv, > Rocks Kgr, KJd, > KJim, MZgr, > PZsp, Tgr, > Ti, TJgr, > Tmi,TRgr, > TRlgr, Tri, > Xm, Ygr >------------------------------------------------------------------- >W Water S&C: water >=================================================================== PERM-GRP is the permeability group, based on the attribute PERM from the USSOILS related data table. >Table correlating the generalized attribute PERM-GRP with the >USSOILS data value. >================================== >PERM-GRP Soil permeability > (inches per hour) >---------------------------------- >Very High >10.00 >High 5.01 - 10.00 >Moderate 2.51 - 5.00 >Low 0.51 - 2.50 >Very Low 0.01 - 0.50 >No Value -0.10 or blank >================================== HHCON is the horizontal hydraulic conductivity range >Table correlating the attribute HYDGEOL and HHCON >================================================= >HYDGEOL HHCON (ft/day) >------------------------------------------------- >Unconsolidated sediments >------------------------------------------------- >Qflv 4 to 2,200 >Qp 3x10-5 to 3,300 >Qf 2 to 90 >Qas 2x10-4 to 150 >------------------------------------------------- >Consolidated rocks >------------------------------------------------- >Bas 2x10-4 to 1,300 >Rhy 2x10-5 to 260 >And 2x10-4 to 60 >Brec/Tuff/Old V 3x10-7 to 600 >Carb-Clas/Carb 3x10-5 to 3,300 >Ts 2x10-4 to 20 >Clas/Sand/Silt 2x10-9 to 18 >Int 7x10-8 to 30 >================================================= AREA-MI is the area in miles squared, computed from the attribute AREA, with conversion factor of 3.861022x10-7. provided above U.S. Geological Survey Water Webserver Team mailing and physical address

12201 Sunrise Valley Drive, MS440

Reston VA 20192 USA (800) 426-9000 h2oteam@usgs.gov Contact via email Downloadable Data Although these data have 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. 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 these data, software, or related materials. ARCE 36.868 http://water.usgs.gov/lookup/getspatial?nv_hydgeolnv_p SDTS 36.868 http://water.usgs.gov/lookup/getspatial?nv_hydgeolnv_p none 20041103 U.S. Geological Survey Rose L. Medina Physical Scientist mailing and physical address

333 W. Nye Lane

Carson City NV 89706 USA (775) 887-7620 (775) 887-7629 rlmedina@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time en 20211103 10184800 FALSE 20211103 10470100 20211103 10470100 USGS_HydroGeology 002 0.000 Projected GCS_North_American_1983 Linear Unit: Meter (1.000000) NAD_1983_UTM_Zone_11N <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/2.8.0'><WKT>PROJCS[&quot;NAD_1983_UTM_Zone_11N&quot;,GEOGCS[&quot;GCS_North_American_1983&quot;,DATUM[&quot;D_North_American_1983&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Transverse_Mercator&quot;],PARAMETER[&quot;False_Easting&quot;,500000.0],PARAMETER[&quot;False_Northing&quot;,0.0],PARAMETER[&quot;Central_Meridian&quot;,-117.0],PARAMETER[&quot;Scale_Factor&quot;,0.9996],PARAMETER[&quot;Latitude_Of_Origin&quot;,0.0],UNIT[&quot;Meter&quot;,1.0],AUTHORITY[&quot;EPSG&quot;,26911]]</WKT><XOrigin>-5120900</XOrigin><YOrigin>-9998100</YOrigin><XYScale>10000</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>26911</WKID><LatestWKID>26911</LatestWKID></ProjectedCoordinateSystem> 1.0 625000 5000 ItemDescription Esri ArcGIS 12.8.0.29751 USGS HydroGeology 240193.65625 765578.5 4653828.5 3876386.75 1 -120.136618 -113.793799 42.038413 34.997038 1 This data set attempts to characterize the hydrogeology of aquifer systems including the lithology and soil permeability. The intended uses of this data set include, but are not limited to, natural resource, modeling, mapping, and visualization applications. <DIV STYLE="text-align:Left;"><P><SPAN>This data set was created as part of a U.S. Geological Survey study, done in cooperation with the Nevada Division of Environmental Protection, to evaluate the susceptibility and vulnerability of ground water to anthropogenic contamination. A basic part of evaluating ground water is characterizing the hydrogeology of aquifer systems including the lithology and soil permeability, which partly control the susceptibility of ground water to contamination (Maurer and others, 2004). The intended uses of this data set include, but are not limited to, natural resource modeling, mapping, and visualization applications.</SPAN></P><P><SPAN>This data set consists of hydrogeology for the State of Nevada. Consolidated rocks and unconsolidated sediments are the two major hydrogeologic units. Consolidated rocks are subdivided into 8 hydrogeologic units: (1) carbonate rocks, Quaternary to Tertiary-age; (2) basaltic, (3) rhyolitic, and (4) andesitic volcanic flows; (5) volcanic breccias, tuffs, and volcanic rocks older than Tertiary-age; (6) intrusive and metamorphic rocks; (7) consolidated and semi-consolidated tuffaceous rocks and sediments; and (8) clastic rocks consisting of sandstone and siltstone. Unconsolidated sediments are subdivided into 4 hydrogeologic units: 1) alluvial slopes, (2) valley floors, (3) fluvial deposits, and (4) playas. In addition, soil permeability is provided and grouped into five descriptive categories ranging from very high to very low, which generally correspond to mapped geomorphic features such as playas and alluvial slopes. The geologic map of Nevada (Stewart and Carlson, 1978), published at a scale of 1:500,000, is the primary source of lithology used to delineate hydrogeologic units, enhanced with elevation and hydrologic data, and supplemented with Landsat Thematic Mapper imagery (Maurer and others, 2004).</SPAN></P><P><SPAN>Dataset last updated from USGS on March 24, 2015. For additional metadata, please see https://water.usgs.gov/GIS/metadata/usgswrd/XML/nv_hydgeolnv_p.xml </SPAN></P><P><SPAN>Dataset downloaded on November 3, 2021 from </SPAN><A href="https://water.usgs.gov/GIS/dsdl/nv_hydgeolnv_p.shp.zip" STYLE="text-decoration:underline;"><SPAN STYLE="text-decoration:underline;"><SPAN>https://water.usgs.gov/GIS/dsdl/nv_hydgeolnv_p.shp.zip</SPAN></SPAN></A></P></DIV> U.S. Geological Survey hydro geology usgs hydrogeology aquifer permeability ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld Local Area Network 36.868 ArcInfo Coverage Enterprise Geodatabase Feature Class 0.000 NAD_1927_UTM_Zone_11N EPSG 6.11(3.0.1) 0 20211103