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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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The roof was generally very good, but when the rolls reduced the coal to less than 5 feet thick, the roof couldn’t be held up. Roof and floor rolls were present in the seam, the floor rolls were more common than those from the roof. The underclay floor contained coal lenses and heaved readily as soon as it got wet. This had only a minor effect on mining.
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