Water-Level and Saturated-Thickness Changes, Predevelopment to 1980, in the High Plains Aquifer in Parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas and Wyoming (HA-652): Luckey, R. R., Gutentag, E. D., Weeks, J. B. (1:2,500,000; 1981), two color sheets, size 48" x 28". Description: This report describes the water-level and saturated-thickness changes from predevelopment to 1980. The maps are folded in an accompanying manila folder.