Subsurface Leaching of Pyritic Coal Mine Spoils and Contaminant Migration.
For Reference Only At Bureau Libraries :122 pages
A site in northeastern Illinois underwent surface mining for coal in 1943 and was reclaimed by the state of Illinois in 1972-73. Additional soil amendments and seed were applied to the spoil surface in 1975-80. Studies in 1975-78 had shown that the surface spoil materials and five final-cut lakes at the site were quite acidic and the lakes contained high concentrations of sulfate and dissolved metals. Surface runoff water from monitoring plots in 1976 were only moderately acidic and the mean concentrations of most dissolved metals and sulfate in the runoff waters were less than 25% of the concentrations found. By 1980, vegetation had become well established over most of the mined areas; however, the five final- cut lakes remained acidic. The purpose of this study was to determine the physical and geochemical subsurface conditions of the spoil materials, the hydrologic flow system within the spoils, and the magnitude of acidic spoil leachate migration into the lakes and into the wetland prairie north of the minesite.
CP; Final Contract Report;
For Reference Only At Bureau Libraries
Southern Illinois Univ.