ROOF FALL (7000-1-003-06) : LOCATION - 1 West #4 Roadway, #7 Crosscut. DIMENSIONS - H:6-7', W:20', L:20'. GEOLOGY - Soft, medium to dark gray shale with prominent roof jointing or slips in roof. ROOF SUPPORT - 6' Instal bolts. The area was mined in November 1993. Prominent roof jointing in the roof were the apparent cause for the fall.