U.S. Geological Survey 2009 vector digital data U.S. Geological Survey Scientific Investigations Map SIM2009-3063 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sim3063_Tahoe_USGS_Wells Russell W. Plume, Mary L. Tumbusch, and Toby L. Welborn 2008 pdf document Scientific Investigations Map SIM2009-3063 Reston, Virginia U.S. Geological Survey http://pubs.usgs.gov/sim/3063/ These data present a ground-water inventory of existing geospatial data and other information needed to determine the extent and characteristics of the aquifers in the Tahoe Basin. Geospatial and other data include geologic maps and soil surveys of the entire basin and for specific watersheds within the basin at the best available scales; vegetation from remote-sensing data; well information from various local, state, and federal agencies; geophysical surveys; and results of available ground-water studies. The compilation and development of a ground-water inventory geospatial database will assist the United States Forest Service in better assessing the present and future impacts on ground-water resources within the Lake Tahoe Basin. The intended uses of this data set include, but are not limited to, natural resource modeling, mapping, and visualization applications. 20071211 publication date Complete None planned -120.230443 -119.867235 39.340945 38.774077 None Well Ground water Inland waters None Lake Tahoe California Nevada None Although this Federal Geographic Data Committee (FGDC) 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. These data are not intended to be used as a survey product and are for reference purposes only. U.S. Geological Survey Nevada Water Science Center Public Information Officer mailing and physical address

2730 N. Deer Run Road

Carson City NV 89701 USA (775)887-7600 (775)887-7629 http://pubs.usgs.gov/sim/3063/sim3063.pdf Map of the Hydrogeology of the Lake Tahoe Basin, California and Nevada pdf Acknowledgment of the U.S. Geological Survey and the U.S.Forest Service would be appreciated in products derived from these data. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780 Verification was done by interactive on-screen review. Frequency tests were performed on all feature class attributes to check that no features were unlabeled, misspelled, or inconsistent. Corrections were made until one visual comparison, combined with on-screen review, determined 100 percent of the digital attribute data was correct. Polygon and chain-node topolgy present. Complete for Lake Tahoe study area. Errors resulting from source data quality, automation processes, and scale resolution can impact the accuracy of data. These data are derived from 1:100,000-scale sources. National Map Accuracy Standards (NMAS) established for the United States in 1947 (U.S. Geological Survey, 1988) state that no more than 10 percent of features shall be more than 1/50th of an inch from their intended location on maps of scale smaller than 1:20,000. National Standards for Spatial Data Accuracy (NSSDA) published by the Federal Geographic Data Committee (FGDC) in 1998 relate the NMAS to the digital geospatial data standard by multiplying the NMAS accuracy by a factor of 1.1406 resulting in expected error in the geospatial data at standard mapping scales as follows: 1: 24,000-scale map - 14 meters 1: 62,500-scale map - 36 meters 1: 100,000-scale map - 58 meters 1: 250,000-scale map - 145 meters 1: 500,000-scale map - 290 meters 1:1,000,000-scale map - 579 meters References Cited FGDC, Subcommittee for Base Cartographic data, 1998, Geospatial Positioning Accuracy Standards, Part 3: National Standard for Spatial Data Accuracy, FGDC-STD-007.3-1998, last accessed 03/29/2007 at URL http://www.fgdc.gov/standards/projects/FGDC-standards-projects/accuracy/part3/chapter3 U.S. Geological Survey, 1988, National mapping program technical instructions - Part 2: Specifications, Standards for Digital Line Graphs: U.S. Geological Survey, 56 p. 58 meters Horizontal accuracy described in the attribute table of the data set. Complete Nevada National Water Information System (NWIS) data pulled. Snapshot_20071210.mdb 2007 Data intersected with study area boundary and reselected by type in ArcMap using select by location and select by attribute functions. Snapshot_20071210.mdb 2007 Snapshot_20071210.mdb Selected site IDs were exported to an ASCI file using XTools. New Site ID list was used for a new data pull from the NWIS database. Sitefile.txt 2007 Tahoe_Snapshot.mdb Spatial enabling of NWIS data pull processed using U.S. Geological Survey Snapshot with a projected to UTM Zone 10N NAD83. Tahoe_Snapshot.mdb 2007 Tahoe_Snapshot_UTM_NAD83.mdb Well point feature data and associated tabular data loaded into Tahoe_GroundWater.gdb in ArcCatalog. Tahoe_Snapshot_UTM_NAD83.mdb 2007 Tahoe_GroundWater.gdb Tahoe_USGS_Well gw_cons gw_csng gw_disc gw_geoh gw_hole gw_hydr gw_lev gw_mpnt gw_open gw_otid Vector Entity point 188 Universal Transverse Mercator 10 0.999600 -123.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000100 0.000100 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Site Dependent 1.000000 Site Dependent Explicit elevation coordinate included with horizontal coordinates Tahoe_USGS_Well Lake Tahoe NWIS Wells U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. agency_cd Source agency code U.S. Geological Survey Agency Code NWIS site_no Site identification number U.S. Geological Survey Unique site identification number site_id NWIS site ID U.S. Geological Survey Unique NWIS site ID station_nm Station name U.S. Geological Survey Station name station_ix Short station name U.S. Geological Survey Short station name lat_va Latitude U.S. Geological Survey Coordinates long_va Longitude U.S. Geological Survey Coordinates dec_lat_va Latitude NAD83 (decimal degrees) U.S. Geological Survey Coordinates dec_long_va Longitude NAD83 (decimal degrees) U.S. Geological Survey Coordinates coord_meth_cd Lat/Long method U.S. Geological Survey C Calculated from land net U.S. Geological Survey D Differential Global Positioning System (DGPS) U.S. Geological Survey G Global positioning system (GPS), Standard Positioning Service (SPS) or U.S. Geological Survey L Long-range navigation system U.S. Geological Survey M Interpolated from map U.S. Geological Survey N Interpolated from Digital Map U.S. Geological Survey R Reported U.S. Geological Survey S Transit, theodolite, or other surveying method U.S. Geological Survey U Unknown U.S. Geological Survey coord_acy_cd Lat/Long coordinate accuracy U.S. Geological Survey H Accurate to +/- .01 second (differentially corrected GPS) U.S. Geological Survey 1 Accurate to +/- .1 second (differentially corrected GPS) U.S. Geological Survey 5 Accurate to +/- .5 second (Precise Positioning Service (PLGR/PPS GPS)) U.S. Geological Survey S Accurate to +/- 1 second U.S. Geological Survey R Accurate to +/- 3 seconds (Standard Positioning Service (SPS GPS)) U.S. Geological Survey F Accurate to +/- 5 seconds U.S. Geological Survey T Accurate to +/- 10 seconds U.S. Geological Survey M Accurate to +/- 1 minute U.S. Geological Survey U Unknown U.S. Geological Survey coord_datum_cd Lat/Long datum U.S. Geological Survey Reported lat/long horizontal datum district_cd District code U.S. Geological Survey 32 Nevada Water Science Center U.S. Geological Survey land_net_ds Land-net location U.S. Geological Survey The legal description of the 10-acre tract in which the site is located map_nm Name of location map U.S. Geological Survey Name of the best available map on which the site can be located country_cd Country code U.S. Geological Survey Federal Information Processing Standards (FIPS) alpha code for the Country in which the site is located state_cd State code U.S. Geological Survey Federal Information Processing Standards (FIPS) alpha code for the State in which the site is located county_cd County code U.S. Geological Survey Federal Information Processing Standards (FIPS) alpha code for the sounty in which the site is located map_scale_fc Scale of location map U.S. Geological Survey Scale of the map identified in the previous field map_nm alt_va Altitude of land surface U.S. Geological Survey the altitude of land surface is the altitude in feet of a fixed reference point (RP) at the well near land surface that can be used to measure the height of the measuring point (MP) and can be surveyed if desired alt_meth_cd Method altitude determined U.S. Geological Survey A Altimeter U.S. Geological Survey D Differential Global Positioning System (DGPS) U.S. Geological Survey G Global Positioning System (GPS) U.S. Geological Survey I Interferometric Synthetic Aperture Radar, airplane (IfSAR) U.S. Geological Survey J Light Detection And Ranging, airplane (LiDAR) U.S. Geological Survey L Level or other surveying method U.S. Geological Survey M Interpolated from topographic map U.S. Geological Survey N Interpolated from digital elevation model (DEM) U.S. Geological Survey R Reported U.S. Geological Survey U Unknown U.S. Geological Survey alt_acy_va Altitude accuracy code U.S. Geological Survey The accuracy of the altitude in terms of the possible error in feet alt_datum_cd Altitude datum U.S. Geological Survey Vertical datum of reported altitude huc_cd Hydrologic unit code U.S. Geological Survey The hydrologic-unit code for the cataloging unit in which the site is located. agency_use_cd Agency use of site code U.S. Geological Survey A Active data-collection site U.S. Geological Survey I Inactive or discontinued data-collection site U.S. Geological Survey O Inventory data site only U.S. Geological Survey basin_cd Drainage basin code U.S. Geological Survey Two-digit code that further subdivides the hydrologic-unit code for the cataloging unit in which the site is located. topo_cd Topographic setting code U.S. Geological Survey A Alluvial fan U.S. Geological Survey B Playa U.S. Geological Survey C Stream channel U.S. Geological Survey D Local depression U.S. Geological Survey E Dunes U.S. Geological Survey F Flat surface U.S. Geological Survey G Flood plain U.S. Geological Survey H Hilltop U.S. Geological Survey K Sinkhole U.S. Geological Survey L Lake, swamp, or marsh U.S. Geological Survey M Mangrove swamp U.S. Geological Survey O Offshore (estuary) U.S. Geological Survey P Piedmont U.S. Geological Survey S Hillslope (slope) U.S. Geological Survey T Alluvial or moraine terrace U.S. Geological Survey U Undulating U.S. Geological Survey V Valley flat (valleys of all sizes) U.S. Geological Survey W Upland draw U.S. Geological Survey inventory_dt Date site established/inventoried U.S. Geological Survey Date that the site was established or inventoried drain_area_va Drainage area U.S. Geological Survey Drainage area in square miles contrib_drain_area_va Contributing drainage area U.S. Geological Survey Contributing drainage area in square miles tz_cd Standard time zone code U.S. Geological Survey Time zone code for the site location local_time_fg Local standard time flag U.S. Geological Survey Y Switches to Local Standard Time (Daylight Savings Time) U.S. Geological Survey N Does not switch to Local Standard Time (Daylight Savings Time) U.S. Geological Survey construction_dt Date of first construction U.S. Geological Survey Date when construction began reliability_cd Data reliability code U.S. Geological Survey C Data have been field checked by the reporting agency U.S. Geological Survey L Location not correct U.S. Geological Survey M Minimal data U.S. Geological Survey U Data have not been field checked by the reporting agency, but the reporting agency considers the data reliable U.S. Geological Survey gw_type_cd Type of ground-water site U.S. Geological Survey C Collector or Ranney type well U.S. Geological Survey D Drain dug to intercept the water table or potentiometric surface to either lower the ground-water level or serves as a water supply U.S. Geological Survey E Excavation U.S. Geological Survey H Sinkhole U.S. Geological Survey I Interconnected wells U.S. Geological Survey M Multiple wells U.S. Geological Survey O Outcrop U.S. Geological Survey P Pond dug to intercept the water table or potentiometric surface and serve as a water supply U.S. Geological Survey R River pump U.S. Geological Survey S Spring (used only on spring schedule) U.S. Geological Survey T Tunnel, shaft, or mine from which ground-water is obtained U.S. Geological Survey W Well, for single wells other than wells of the collector or Ranney type U.S. Geological Survey X Test hole not completed as a well U.S. Geological Survey aqfr_cd Primary aquifer code U.S. Geological Survey The eight-character code identifying the primary aquifer unit nat_aqfr_cd National aquifer code U.S. Geological Survey The ten-character code identifying that national aquifer (principal aquifer) site_use_1_cd Primary use of site U.S. Geological Survey A Anode U.S. Geological Survey C Standby emergency supply U.S. Geological Survey D Drain U.S. Geological Survey E Geothermal U.S. Geological Survey G Seismic U.S. Geological Survey H Heat reservoir U.S. Geological Survey M Mine U.S. Geological Survey O Observation U.S. Geological Survey P Oil or gas well U.S. Geological Survey R Recharge U.S. Geological Survey S Repressurize U.S. Geological Survey T Test hole U.S. Geological Survey U Unused site U.S. Geological Survey V Withdrawal/return U.S. Geological Survey W Withdrawal of water U.S. Geological Survey X Waste disposal U.S. Geological Survey Z Destroyed U.S. Geological Survey site_use_2_cd Secondary use of site U.S. Geological Survey A Anode U.S. Geological Survey C Standby emergency supply U.S. Geological Survey D Drain U.S. Geological Survey E Geothermal U.S. Geological Survey G Seismic U.S. Geological Survey H Heat reservoir U.S. Geological Survey M Mine U.S. Geological Survey O Observation U.S. Geological Survey P Oil or gas well U.S. Geological Survey R Recharge U.S. Geological Survey S Repressurize U.S. Geological Survey T Test hole U.S. Geological Survey U Unused site U.S. Geological Survey V Withdrawal/return U.S. Geological Survey W Withdrawal of water U.S. Geological Survey X Waste disposal U.S. Geological Survey Z Destroyed U.S. Geological Survey site_use_3_cd Tertiary use of site U.S. Geological Survey A Anode U.S. Geological Survey C Standby emergency supply U.S. Geological Survey D Drain U.S. Geological Survey E Geothermal U.S. Geological Survey G Seismic U.S. Geological Survey H Heat reservoir U.S. Geological Survey M Mine U.S. Geological Survey O Observation U.S. Geological Survey P Oil or gas well U.S. Geological Survey R Recharge U.S. Geological Survey S Repressurize U.S. Geological Survey T Test hole U.S. Geological Survey U Unused site U.S. Geological Survey V Withdrawal/return U.S. Geological Survey W Withdrawal of water U.S. Geological Survey X Waste disposal U.S. Geological Survey Z Destroyed U.S. Geological Survey aqfr_type_cd Aquifer-type code U.S. Geological Survey U Unconfined single aquifer U.S. Geological Survey N Unconfined multiple aquifers U.S. Geological Survey C Confined single aquifer U.S. Geological Survey M Confined multiple aquifers U.S. Geological Survey X Mixed (confined and unconfined multiple aquifers) U.S. Geological Survey well_depth_va Well depth U.S. Geological Survey The depth of the finished well, in feet below land-surface datum hole_depth_va Hole depth U.S. Geological Survey The total depth to which the hole was drilled, in feet below the land-surface datum depth_src_cd Source-of-depth data U.S. Geological Survey A Reported by another government agency that is not the well owner U.S. Geological Survey D From driller's log or report U.S. Geological Survey G Private geologist-consultant or university associate U.S. Geological Survey L Depth interpreted from geophysical logs by personnel of source agency U.S. Geological Survey M Memory (owner, operator, or driller) U.S. Geological Survey O Reported by the owner of the well U.S. Geological Survey R Reported by person other than the owner, driller, or another government agency U.S. Geological Survey S Measured by personnel of reporting agency U.S. Geological Survey Z Other source U.S. Geological Survey Aquifer_Cd Aquifer code U.S. Geological Survey 001 Incline Village U.S. Geological Survey 002 Tahoe City/West Shore Aquifer(s) U.S. Geological Survey 003 South Lake Tahoe/Stateline Aquifer U.S. Geological Survey 005 Kings Beach/Tahoe Vista Aquifer U.S. Geological Survey 007 East Shore Aquifer U.S. Geological Survey Minor_Aq_Cd Minor aquifer code. U.S. Geological Survey 007A Sand Harbor U.S. Geological Survey 007B Glenbrook U.S. Geological Survey 007C Zephyr Cove U.S. Geological Survey rel_gw_cons Relationship ESRI rel_gw_csng Relationship ESRI rel_gw_disc Relationship ESRI rel_gw_geoh Relationship ESRI rel_gw_hole Relationship ESRI rel_gw_hydr Relationship ESRI rel_gw_lev Relationship ESRI rel_gw_mpnt Relationship ESRI rel_gw_open Relationship ESRI rel_gw_otid Relationship ESRI gw_cons Table - well construction data U.S. Geological Survey gw_csng Table - well casing data U.S. Geological Survey gw_disc Table - pumptest data U.S. Geological Survey gw_geoh Table - lithologic data U.S. Geological Survey gw_hole Table - well hole data U.S. Geological Survey gw_hydr Table - well hydrologic unit information U.S. Geological Survey gw_lev Table - water level observation data U.S. Geological Survey gw_mpnt Table - well measuring point data U.S. Geological Survey gw_open Table - well screen and interval data U.S. Geological Survey gw_otid Table - other identification information U.S. Geological Survey U.S. Geological Survey Ask USGS ? Water Webserver Team Address of the ESIC mailing

507 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+sim3063_Tahoe_USGS_Wells 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 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 these data, software, or related materials. File Geodatabase 9.2 File Geodatabase Spatial and attribute information WinZip 40.7 mb http://water.usgs.gov/GIS/dsdl/SIM3063.zip File Shape 9.2 File Shape Spatial and attribute information WinZip 34.890 mb http://water.usgs.gov/GIS/dsdl/SIM3063_Shapefile.zip XML Workspace Document 2008 Spatial and attribute information WinZip 35.5 mb http://water.usgs.gov/GIS/dsdl/SIM3063_XML.zip This dataset is provided by the USGS as a public service. 20081222 20090326 20081019 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

507 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+sim3063_Tahoe_USGS_Wells FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998