McGuire, V. L., Sharpe, J. B. 1997. Water-Level Changes in the High Plains Aquifer, Predevelopment to 1995 (WRIR-97-4081). Two sheets, size 41" x 30". Description: The purpose of this report is to present: 1) the water level changes in the High Plains aquifer for three time periods; and 2) the precipitation pattern in the region underlain by the High Plains aquifer. The water-level changes and precipitation patterns are shown in maps; periodic water levels for selected wells are shown in hydrographs.