Illinois State Geological Survey Manuscript County: St. Clair Title: Geologic Studies for Mine Backfilling Projects, Southwestern Illinois : First Quarterly Report for the Bureau of Mines, U.S. Department of the Interior Author: DuMontelle, Paul B., E. Donald McKay, Paul J. Ehret Call Number: MS DuMontelle, P.B. #3 Location Record 2 of 5