ROOF FALL (7000-1-001-06) : LOCATION : Outby 1 North 3 West Seals - #4 Seal. DIMENSIONS : H:6-10', W:19', L:280'. GEOLOGY : Soft, medium to dark gray shale with prominent roof jointing or slips in roof. ROOF SUPPORT : 6' Hytech point anchor bolts. The area was mined in June 1993. Prominent roof jointing or slips in the roof were the apparent cause for the fall.