ROOF FALL (7000-1-012-05) LOCATION - Top of Fault Hill, East of Spad #166. DIMENSIONS - H:6-6.5', W:19', L:120'. GEOLOGY - Soft, medium to dark gray shale with prominent roof jointing or slips in roof. ROOF SUPPORT - 6' conventional bolts. The area was mined in March 1974. Prominent roof jointing or slips in the roof were the apparent cause for the fall.