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Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
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Occasional rolls were present. The roof was dark gray or black shale with 6 to 24 inches of clod above it. A 3-inch band of limestone occurred above the clod, separated from the main limestone caprock by a 1-inch clay seam. Some of the shale was severely fractured and contained many slips, making a treacherous roof. Some rooms had to be abandoned due to inability to keep the roof up. The 1935 source map showed bad top and squeezed areas in the NE of section 28 and NW of section 27, bad top in NW and SW of section 22, and caved areas in SW section 22 and NE of section 21 (all T7N-R6W). This mine was the site of one of the earliest experiments in roof bolting in 1947, which proved very effective. The coal contained pyrite lenses (up to 1 inch wide) and calcite and gypsum stringers above the blue band.
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