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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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The mine map shows faults cutting through the northern half of the mine. A fault was noted 4000 feet from the bottom of the shaft; its displacement was from 3 to 32 feet, upthrown on the eastern side. The coal was shattered near the fault and many slips parallel to the fault were present. The light gray sandy shale roof (up to 40 feet thick) was full of slips and tended to come down without warning. Generally the roof held better in the east-west entries than in the north-south entries. Top coal was left to support the roof where possible, but sometimes the coal was too thin and did not provide adequate support. The coal bed had swags, and in one case the coal dropped 6 feet for a distance of 300 feet but remained full thickness. Pyrite and calcite stringers were present in fractures and as fillings throughout the mine and the full thickness of the coal. The floor clay varied from 6 inches to 4 feet thick, and heaved when wet. In some places, however, the underclay was a dark gray fireclay that made excellent floor.
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