This study was conducted to monitor the impact upon water quality when using dredged material to reclaim coal-mine spoil. An area of severely degraded mine spoil near Ottawa, Illinois, was divided into four plots by dikes of spoil material covered with heavy plastic. The plots were arranged into a control plot of untreated mine spoil and three treatment plots that received a 0.9-m-thick cover of dredged material and two of these plots received applications of agricultural lime prior to placement of dredged material. The plots were instrumented with a Parshall flume to measure runoff, pressure-vacuum soil water samplers to collect water samples within the dredged material/mine spoil profile, and two wells in the vicinity of the plots to collect groundwater samples. (Author).