Characterization of the Rate and Direction of Shallow Ground-Water Flow at a Waste-Disposal Site Near Wempletown, Illinois

Water-level data, single-well aquifer testing, rock-core analysis, and geophysical logging collected at a waste-disposal site near Wempletown, Illinois, during 1987-94, have been used to determine the geohydrologic properties of the upper part of the Galena-Platteville aquifer underlying this site, according to a report released by the U.S. Geological Survey (USGS). The investigations were performed by the USGS in cooperation with the U.S. Environmental Protection Agency (USEPA). The information in the report was required to characterize the rate and direction of shallow ground-water flow in this area.

The stratigraphy of the upper part of the Galena-Platteville aquifer was identified. Chert beds in these formations have a higher porosity than the dolomite. Steven Robinson, USGS hydrologist and principal author of the report, said, "The data provide the basis for understanding ground-water flow within the aquifer."

This report, titled, "Geohydrology of the upper part of the Galena-Platteville aquifer underlying a waste-disposal site near Wempletown, Illinois, by Steven M. Robinson and Douglas J. Yeskis, has been released as U.S. Geological Survey Open-File Report 97-381. Copies are available for inspection at the U.S. Geological Survey, 221 North Broadway Ave., Urbana, Illinois. Paper and microfiche copies can be purchased at cost from the U.S. Geological Survey, Information Service, Box 25286, Federal Center, Denver, CO 80225 (telephone (303)202-4700). Orders must include check or money order payable to U.S. Department of the Interior--U.S. Geological Survey and must specify report number OFR 97-381.