Digital map of water-level changes in the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1980 to 1997
This data set consists of digital water-level-change contours for the High Plains 
aquifer in the central United States, 1980 to 1997.  The High Plains aquifer 
extends from south of 32 degrees to almost 44 degrees north latitude and 
from 96 degrees 30 minutes to 104 degrees west longitude.  The aquifer
underlies …