FALL OF ROOF OR BACK at Wabash Mine Holding Company
ROOF FALL (7000-1-012-06) : LOCATION : Main E-Crosscut #113 Betwen Road and Belt. DIMENSIONS : H-6', W-19', L-50'. GEOLOGY : Soft, medium to dark gray shale with prominent roof jointing or slips in roof. ROOF SUPPORT : 5' fully grounted bolts.
U.S. Mine Safety and Health Administration