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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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The immediate roof was gray sandy shale that ranged from 11 to 50 feet thick and was interbedded with the top layers of the coal, and came down readily. Rolls from the roof were an important factor to mining. A small amount of sulfur and gypsum was present in cracks throughout most of the mine. The floor was clay up to 6 feet thick. The mine was dry, but the clay did swell readily upon becoming wet. Heaving was not a characteristic of this mine. Faults were noted on the company map in various parts of the mine, but particularly in sections 19 and 20 of T18N R11W. Some faults disturbed the mining pattern and made the coal difficult to get while others had no apparent affect. Some of these faults may have been channels or other erosional features. A 70-foot roof fall was noted southeast of the shaft.
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