A ROOF FALL WAS DISCOVERED ON A-3 MAINS 7-8 XCUT& 8 INTERSECTION AT SURVEY STATION #786 2 BREAKSINBY C-MAINS SWITCH. FALL APPROX. 18'W X 60'L X 20'H. IT CONTAINED 6' 5/8"" RESIN, 5' TORQUE TENS ION & 14' CABLE BOLTS, CRIBS & STEEL IBEAMS. THETRACK ENTRY WILL BE RE-ROUTED & THE APPROACHES HAVE BEEN SUPPORTED & DANGERED OFF.