Steven K. Predmore 2003 vector digital data Open-File Report OFR 03-392 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?cont1998 This data set consists of digital water-table contours for the Mojave River and the Morongo Ground-Water Basins. The U.S. Geological Survey constructed a water-table map of the Mojave River and the Morongo Ground-Water Basins for ground-water levels measured during the spring of 1998. Water-level data were collected from 418 wells to construct the contours. The water-table contours were digitized from the paper map which was published at a scale of 1:175,512. The contour interval rangs from 3,400 to 1,500 feet above sea level. This data set is a digital representation of the contours presented on the map published in 2000, "Regional Water Table (1998) and Ground-Water-Level Changes in the Mojave River and the Morongo Ground-Water Basins, San Bernardino County, California", by Gregory A. Smith and M. Isabel Pimentel, U.S. Geological Survey WRIR 00-4090, and make the data available for use with geographic information systems. The Mojave River and the Morongo Ground-Water Basins are in the Mojave Desert region. The rapid growth in population in these basins, which is due, in part, to their proximity to Los Angeles, has increased the demand for water. Increased pumping to meet the needs of an increasing resident population has resulted in ground-water overdraft in parts of the ground-water basin (Smith and Pimentel 2000). 1998 publication date Complete None planned -117.712444 -116.206995 35.094483 34.120678 none Water Table Water Level Contours drainage basins ground water hydrology levels USGS inlandWaters none Morongo Mojave Desert Southern California California San Bernardino County None None U.S. Geological Survey Steven K. Predmore Geographer mailing address

5735 Kearny Villa Road, Suite O

San Diego CA 92123 USA 1-888-275-8747 Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800 Gregory A. Smith and M. Isabel Pimentel 2000 map Water-Resources Investigations Report 00-4090 Chain-node topology present. This data set includes all the 1996 water-table elevation contours published on WRIR 00-4090. A tiff file was obtained from the original Adobe Illustrator file use to create the original map. The tiff file was then georeferenced using known township corners. The contours were then digitized from the georeferenced tiff. 2003 The contours were edited to add the Line_type field and the WL field. 2003 Vector String 131 Universal Transverse Mercator 11 0.999600 -117.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000256 0.000256 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Mean sea level 0.000010 feet Explicit elevation coordinate included with horizontal coordinates cont1998 Shapefile Attribute Table ESRI FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. WL Altitude of water table. Map 1,500 3,400 Feet above sea level 50 Irregular Shape_Leng Length of feature in internal units. ESRI Positive real numbers that are automatically generated. Line_type Contour line type on orignal map. Map Dashed Dashed contour line on map. (Contour approximately located.) Map Solid Solid contour line on map. Map 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://water.usgs.gov/user_feedback_form.html 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. Other Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/cont1998.zip 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+cont1998 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998