Runkle, Donna Rea, Alan Source data sets and supplemental information provided by Mark F. Becker 1997 1.0 map Open-File Report 96-453 Reston, VA U.S. Geological Survey https://water.usgs.gov/lookup/getspatial?ofr96-453_wlelev This data set consists of digitized water-level elevation contours for the Rush Springs aquifer in western Oklahoma. This area encompasses all or part of Blaine, Caddo, Canadian, Comanche, Custer, Dewey, Grady, Stephens, and Washita Counties. The water-level elevation data set was created to be used as input into a computer model to simulate the ground-water flow in the Rush Springs aquifer. In the ground-water flow model, Mark F. Becker (U.S. Geological Survey, written commun., 1997) defined the Rush Springs aquifer to include the Rush Springs Formation, alluvial and terrace deposits along major streams, and parts of the Marlow Formations, particularly in the eastern part of the aquifer boundary area. The Permian-age Rush Springs Formation consists of highly cross-bedded sandstone with some interbedded dolomite and gypsum. The Rush Springs Formation is overlain by Quaternary-age alluvial and terrace deposits that consist of unconsolidated clay, silt, sand, and gravel. The Rush Springs Formation is underlain by the Permian-age Marlow Formation that consists of interbedded sandstones, siltstones, mudstones, gypsum-anhydrite, and dolomite beds. The parts of the Marlow Formation that have high permeability and porosity are where the Marlow Formation is included as part of the Rush Springs aquifer (Mark F. Becker, written commun., 1997). The Rush Springs aquifer underlies about 2,400 square miles of western Oklahoma and is an important source of water for irrigation, livestock, industrial, municipal, and domestic use. Irrigation wells are reported to have well yields greater than 1,000 gallons per minute (Mark F. Becker, written commun., 1997). The water-level elevation data set was prepared at a scale of 1:250,000 by Mark F. Becker (written commun., 1997) from water levels measured in wells prior to the year 1950 that represented "pre-development" water-level conditions. Pre-development is a term used to indicate a time before many irrigation wells were constructed in the Rush Springs aquifer. The digital data set contains water-level elevations that range from 1,200 to 1,850 feet above sea level or the National Geodetic Vertical Datum of 1929 (NGVD29) (Mark F. Becker, written commun., 1997). This data set was created for a project to develop data sets to support ground-water vulnerability analysis. The objective was to create and document a digital geospatial data set from a published paper report or map, or existing digital geospatial data set that could be used in ground-water vulnerability analysis. Introduction -- This data set consists of digitized water-level elevation contours for the Rush Springs aquifer in western Oklahoma. This area encompasses all or part of Blaine, Caddo, Canadian, Comanche, Custer, Dewey, Grady, Stephens, and Washita Counties. The water-level elevation data set was created to be used as input into a computer model to simulate the ground-water flow in the Rush Springs aquifer. In the ground-water flow model, Mark F. Becker (U.S. Geological Survey, written commun., 1997) defined the Rush Springs aquifer to include the Rush Springs Formation, alluvial and terrace deposits along major streams, and parts of the Marlow Formations, particularly in the eastern part of the aquifer boundary area. The Permian-age Rush Springs Formation consists of highly cross-bedded sandstone with some interbedded dolomite and gypsum. The Rush Springs Formation is overlain by Quaternary-age alluvial and terrace deposits that consist of unconsolidated clay, silt, sand, and gravel. The Rush Springs Formation is underlain by the Permian-age Marlow Formation that consists of interbedded sandstones, siltstones, mudstones, gypsum-anhydrite, and dolomite beds. The parts of the Marlow Formation that have high permeability and porosity are where the Marlow Formation is included as part of the Rush Springs aquifer (Mark F. Becker, 1997). The Rush Springs aquifer is overlain by the Permian-age Cloud Chief Formation in some parts of the western and northern sections of the aquifer. Where greater than 50 feet thick the Cloud Chief Formation is a confining unit that consists of massive gypsum units interbedded with reddish-brown shales and siltstones (Mark F. Becker, written commun., 1997). The Rush Springs aquifer underlies about 2,400 square miles of western Oklahoma and is an important source of water for irrigation, livestock, industrial, municipal, and domestic use. Irrigation wells are reported to have well yields greater than 1,000 gallons per minute (Mark F. Becker, written commun., 1997). In this report, elevation refers to distance above sea level and sea level refers to the National Geodetic Vertical Datum of 1929 (NGVD29)--a geodetic datum derived from a general adjustment of the first-order level nets of both the United States and Canada, formerly called Sea Level Datum of 1929. The water-level elevation data set was prepared at a scale of 1:250,000 by Mark F. Becker (written commun., 1997) from water levels measured in wells prior to the year 1950 that represented "pre-development" water-level conditions. Pre-development is a term used to indicate a time before many irrigation wells were constructed in the Rush Springs aquifer. The digital data set contains water-level elevations that range from 1,200 to 1,850 feet above sea level or NGVD29 (Mark F. Becker, written commun., 1997). Mark F. Becker also prepared a water-level elevation data set for water levels measured in 1985 and 1986. The pre-development and 1985-1986 water-level elevation contour maps are very similar. The pre-development water-level data set was chosen to create the data set in this report because it was used as input into the ground-water flow model (Mark F. Becker, written commun., 1997). Reviews Applied to Data -- This electronic report was subjected to the same review standard that applies to all U.S. Geological Survey reports. Reviewers were asked to check the topological consistency, tolerances, attribute frequencies and statistics, projection, and geographic extent. Reviewers were given digital data sets and paper plots for checking against the source maps to verify the linework and attributes. The reviewers checked the metadata and a_readme.1st files for completeness and accuracy. Related Spatial and Tabular Data Sets -- This data set is one of four digital map data sets being published together for this aquifer. The four data sets are: > aqbound - aquifer boundaries > cond - hydraulic conductivity > recharg - aquifer recharge > wlelev - water-level elevation contours Digital map data sets of the Oklahoma surficial geology digitized from 1:250,000-scale maps (or 1:125,000-scale maps for the three Oklahoma panhandle counties) are published separately. Other References Cited -- Environmental Systems Research Institute, Inc. (ESRI), 1995, ARC/INFO Command Reference, ARC/INFO On-line manuals: Redlands, CA. Notes -- 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 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. 1950 ground conditions prior to 1950 Complete None planned -99.0990 -97.8587 36.0603 34.6059 USGS Thesaurus ground-water vulnerability groundwater vulnerability aquifers ground water groundwater Rush Springs aquifer Rush Springs Formation Marlow Formation Cloud Chief Formation ground-water levels groundwater levels water levels ground-water level elevation groundwater level elevation ground-water level elevation contours groundwater level elevation contours water-level elevation contours water level elevation contours water-level contours water level contours water-level elevation water level elevation inlandWaters ISO 19115 Topic Category geoscientificInformation inlandWaters environment USGS Metadata Identifier USGS:878746f6-524e-48aa-9ece-024f3bd26ce9 Geographic Names Information System western Oklahoma None. This data set represents water-level elevation contours digitized from maps at a scale of 1:250,000 by Mark F. Becker (written commun., 1997). The ground-water elevation contours represented at this scale are indicative of broad, regional trends and should not be interpreted as site specific. Donna L. Runkle U.S. Geological Survey Hydrologist mailing address

202 NW 66th St., Bldg. 7

Oklahoma City Oklahoma 73116 United States of America 1-888-275-8747 (405) 843-7712 dlrunkle@usgs.gov none https://water.usgs.gov/GIS/browse/ofr96-453.gif A browse image of the four aquifer data sets. GIF Compilation of this data set and the associated metadata was funded under a cooperative Joint Funding Agreement between the U.S. Geological Survey and the State of Oklahoma, Office of the Secretary of Environment. Public UNCLASSIFIED None Operating System-- UNIX, ARC/INFO Version 7.0.3,(Mon Mar 13 22:21:55 PST 1995) Polygon and chain-node topology present. This data set includes all water-level elevation contours for the Rush Springs aquifer from Mark F. Becker (written commun., 1997). None 64 meters Resolution as reported None. Map projection information was not stored with the original data sets therefore the map projection information, Universal Transverse Mercator (UTM) project, zone 14, North American Datum of 1927 (NAD27), was added using the ARC/INFO PROJECTDEFINE command (ESRI, 1995). The projection was later converted to the Albers Conical Equal Area, North American Datum of 1983 (NAD83) using the ARC/INFO PROJECT command (ESRI, 1995). 19970522 The data set was edited and lines were attributed for ELEV and LTYPE. 19970626 A paper plot of the data set was compared to plots of maps from Mark F. Becker (written commun., 1997) to verify the location and labels of lines in the data set. 19970626 Vector Point String 268 GT-polygon composed of chains Albers Conical Equal Area 29.5 45.5 -96 23 0.0 0.0 coordinate pair 64 meters 64 meters METERS North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 WLELEV.AAT Attribute table of WLELEV. ARC/INFO - Attribute table of WLELEV. ARC/INFO - n/a n/a FNODE# Internal number of from-node Computed Sequential unique positive integer n/a n/a TNODE# Internal number of to-node Computed Sequential unique positive integer n/a n/a LPOLY# Internal number of poly to left of arc Computed Sequential unique positive integer n/a n/a RPOLY# Internal number of poly to right of arc Computed Sequential unique positive integer n/a n/a LENGTH Length of arc in coverage units Computed Positive real numbers n/a n/a WLELEV# Internal feature number Computed Sequential unique positive integer n/a n/a WLELEV-ID User-assigned feature number User-defined Integer n/a n/a ELEV Water-level contour elevation in feet above NGVD29 Mark F. Becker (written commun., 1997) 1,200 1,850 LTYPE Line type Mark F. Becker (written commun., 1997) 1 n/a n/a MAJOR1 Water-level contour elevation in feet above NGVD29 Mark F. Becker (written commun., 1997) 1,200 1,850 MINOR1 Line type Mark F. Becker (written commun., 1997) 1 n/a n/a Two attributes are associated with each line in this digital data set. The first attribute, ELEV, contains the elevation of the water-level contour, expressed in feet above the National Geodetic Vertical Datum of 1929 (NGVD29). The second attribute, LTYPE, contains the code 1 that indicates a solid line on the source map. ELEV is stored in the first major code (MAJOR1) and LTYPE is stored in the first minor code (MINOR1) for lines in the Digital Line Graph (DLG) version of this data set. See overview. U.S. Geological Survey Michael Ierardi IT Specialist mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov 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. Export Full coverage zipped 1 https://water.usgs.gov/GIS/dsdl/ofr96-453_wlelev.e00.gz Other DLG file format zipped 1 https://water.usgs.gov/GIS/dsdl/ofr96-453_wlelev.dlg.gz None. This dataset is provided by USGS as a public service. 20201117 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) mierardi@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998