A ROOF FALL OCCURRED AT APPROX. 1:30 AM IN THE #3 HEADING, #2 CROSSCUT OF THE NORTHWEST MAINS APPROX. 30' INBY S.S. #12017. THE FALL WAS 12' LONG X 5' WIDE X 5' THICK. ROOF WAS LAMINATED SHALE AND WAS BOLTED WITH 5' TORQUE-TENSION BOLTS AND CABLE BOLTS. ADDITIONAL SUPPORTS INCLUDED CRIBS, BEAMS, STEEL POST AND TIMBERS.