AN UNINTENTIONAL ROOF FALL OCCURRED IN AN AREA OF ADVERSE ROOF. THE FALL WAS 70' INBY SURVEY SPADS 1053 & 1054. IN THE #2 & 3 INTERSECTIONS. THE FALL MEASURED APPROX 140'LONG X 117'WIDE X 6'PL US HIGH. AREA HAD BEEN SUPPORTED WITH 6"" 8' & 12' ROOF BOLTS. FALL WILL NOT BE CLEANED UP.