Digital map of water levels in 1980 for the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming

This digital data set consists of contours for 1980 water-level
elevations for the High Plains aquifer in the central United
States. The High Plains aquifer extends from south of 32
degrees to almost 44 degrees north latitude and from 96 degrees
30 minutes to 106 degrees west longitude. The outcrop area
covers 174,000 square miles and is present in Colorado, Kansas,
Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and
Wyoming.

This digital data set was created by digitizing the 1980
water-level elevation contours from a 1:1,000,000-scale base map
created by the U.S. Geological Survey High Plains Regional
Aquifer Systems-Analysis (RASA) project (Gutentag, E.D., Heimes,
F.J., Krothe, N.C., Luckey, R.R., and Weeks, J.B., 1984,
Geohydrology of the High Plains aquifer in parts of Colorado,
Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and
Wyoming: U.S. Geological Survey Professional Paper 1400-B, 63
p.) The data are not intended for use at scales larger than
1:1,000,000.