Becker, Carol J. Runkle, Donna Rea, Alan 1997 1.0 map Open-File Report 96-450 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ofr96-450_wlelev This data set consists of digitized water-level elevation contours for the Enid isolated terrace aquifer in northwestern Oklahoma. The Enid isolated terrace aquifer covers approximately 82 square miles and supplies water for irrigation, domestic, municipal, and industrial use for the City of Enid and western Garfield County. The Quaternary-age Enid isolated terrace aquifer is composed of terrace deposits that consist of discontinuous layers of clay, sandy clay, sand, and gravel. The aquifer is unconfined and is bounded by the underlying Permian-age Hennessey Group on the east and the Cedar Hills Sandstone Formation of the Permian-age El Reno Group on the west. Cedar Hills Sandstone Formation fills a channel beneath the thickest section of the Enid isolated terrace aquifer in the midwestern part of the aquifer. The water-level elevation contours were digitized from a photocopy of a paper map in a ground-water modeling thesis and report. The map digitized was published at a scale of 1:62,500 shows that the ground-water elevations in 1973 ranged from about 1,360 feet above sea level at the northwestern edge to about 1,150 feet above sea level at the southeastern edge of the aquifer. 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 report or map that could be used in ground-water vulnerability analysis. Introduction -- This data set consists of digitized polygons of constant hydraulic conductivity values for the Enid isolated terrace aquifer in northwestern Oklahoma. The Enid isolated terrace aquifer covers approximately 82 square miles and supplies water for irrigation, domestic, municipal, and industrial use for the City of Enid and western Garfield County (Beausoleil, 1981). The Quaternary-age Enid isolated terrace aquifer is composed of terrace deposits that consist of discontinuous layers of clay, sandy clay, sand, and gravel. The aquifer is unconfined and is bounded by the underlying Permian-age Hennessey Group on the east and the Cedar Hills Sandstone Formation of the Permian-age El Reno Group on the west. The Cedar Hills Sandstone Formation fills a channel beneath the thickest section of the Enid isolated terrace aquifer in the midwestern part of the aquifer (Beausoleil, 1981). The water-level elevation contours were digitized from a photocopy of a paper map from the ground-water modeling thesis, "A ground-water management model for the Enid isolated terrace aquifer in Garfield County, Oklahoma," by Beausoleil (1981, plate 1). The source map, page 4, was published at a scale of 1:62,500. In this report, elevation refers to distance above sea level and sea level refers to the National Gedodetic 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. Water-level elevations, measured in 1973 (Beausoleil, 1981), ranged from about 1,360 feet above sea level at the northwestern edge to about 1,150 feet above sea level at the southeastern edge of the aquifer and had a gradient of about 21 feet per mile. These same water-level elevations were used by Kent, Beausoleil, and Witz (1982) in a ground-water flow model of the Enid isolated terrace aquifer. 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 -- Beausoleil, Y.J., 1981, A ground-water management model for the Enid isolated terrace aquifer in Garfield County, Oklahoma: Stillwater, OK, Oklahoma State University, master's thesis, 66 p., 4 pls., 25 figs. Kent, D.C., Beausoleil, Y.J. and Witz, F.E., 1982, Evaluation of aquifer performance and water supply capabilities of the Enid isolated terrace aquifer in Garfield County, Oklahoma: Stillwater, OK, Department of Geology, Oklahoma State University report, 58 p., 19 figs. (Final report to the Oklahoma Water Resource Board) 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. 1973 ground conditions Complete None planned. -97.9733 -97.7536 36.5050 36.3703 none ground-water vulnerability groundwater vulnerability aquifers ground water groundwater Enid isolated terrace aquifer Enid terrace aquifer Enid aquifer terrace aquifer terrace deposit 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 none northwestern Oklahoma None. This data set was digitized from a map published at a scale of 1:62,500. The map represents the elevations of water levels in the aquifer in 1973 as reported by Beausoleil (1981). Water-level elevation contours represented at this scale are indicative of broad, regional trends and should not be interpreted as site specific. The water-level elevation contours were digitized from a photocopy of a folded paper map (17.5 inches by 14 inches) with a maximum registration root-mean-squared error (RMSE) of 0.009 map inches (0.023 map centimeters) and 49.2 feet (15 meters) ground distance. Carol J. Becker 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 cjbecker@usgs.gov none http://water.usgs.gov/lookup/get?OFR96-450/browse.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) Chain-node topology present. This data set includes all the water-level elevation contours published on plate 1 by Beausoleil (1981). None 13 meters Resolution as reported None. A tic coverage was created using township and range corners from 1:24,000 scale U.S. Geological Survey quadrangle maps. Four tics were registered on the source map with a maximum registration root-mean-squared error (RMSE) of 0.009 map inches (0.023 map centimeters) or 49.2 feet (15 meters) ground distance and the water-level elevation contours were digitized in one session. The lines were attributed for ELEV and LTYPE. The coverage was documented. 19960830 Vector Point String 25 GT-polygon composed of chains Albers Conical Equal Area 29.5 45.5 -96 23 0.0 0.0 coordinate pair 13 meters 13 meters METERS North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 WLELEV.AAT Arc attribute table ARC/INFO - Arc attribute table 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 polygon to left of arc Computed Sequential unique positive integer n/a n/a RPOLY# Internal number of polygon 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 Beausoleil (1981) 1,150 1,360 MAJOR1 Water-level contour elevation in feet above NGVD29 Beausoleil (1981) 1,150 1,360 LTYPE Line type Beausoleil (1981) 1 n/a n/a MINOR1 Line type Beausoleil (1981) 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. The second attribute, LTYPE, contains a code of 1 indicating the line is solid on the source map. ELEV is stored in the first major code (MAJOR1) for lines, and LTYPE is stored in the first minor code (MINOR1) in the Digital Line Graph (DLG) version of this data set. See overview. 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://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr96-450_wlelev 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 http://water.usgs.gov/GIS/dsdl/ofr96-450_wlelev.e00.gz Other DLG file format zipped 1 http://water.usgs.gov/GIS/dsdl/ofr96-450_wlelev.dlg.gz None. This dataset is provided by USGS as a public service. 20041108 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://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr96-450_wlelev FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998