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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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A large roll interfered with mining in one area, closing the entry. The underclay heaved badly in one location. The source map shows a long haulageway connecting two portions of the mine. The haulageway was heavily reinforced to keep haulage open, as the roof was very bad. The Energy Shale forms the roof in the mine. When the Energy Shale was less than 7.5 ft thick, the shale was pulled down. When the shale was over 37.5 ft thick, it could be kept up. Mining was not economical in the transition area where the Energy Shale was more than 7.5 ft thick but less than 37.5 ft thick.
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