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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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Concretions (some 5 feet long, 3 feet wide and 1.5 feet thick) surrounded by slips were present and fell without warning. Limestone protrusions extended down into the coal seam. Roof conditions in this mine were otherwise considered very good. The floor clay heaved, but was thin (1.5 to 2 feet).
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