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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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A fault was shown on the mine map in the northeast portion of the mine that halted further mine expansion in that direction. A less-disruptive fault was also shown in the southwestern corner of the mine. An area in the northwestern corner of the mine squeezed. A 1927 gas explosion killed 7 men. In the southwestern part of the mine, a roof fall has produced an area of 4-foot subsidence on the surface. The roof was a medium hard, light gray shale, irregularly bedded, and very difficult to keep up. At times, no coal was left to support the roof, and roof falls were common, making the roof shale an important impurity in the product. At other times (1917 Coal Report, p. 275), 2 feet of top coal was left to support the roof, but this was recovered on retreat, along with pillar extraction. Pillar extraction was common in 1917 and 1918, but its extent throughout the mine is unknown. A few minor rolls and many slips were present, but there was no displacement of the coal, so these had a minor effect on mining. The coal had a clay parting and clay and stony pyrite laminae. Some pyrite was impregnated in the coal, and a vertical network of veinlets and rare or sporadic small stony lenses (0.25 by 2 inches). Sometimes bottom coal was left in the rooms.
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