DURING REGULAR WEEKLY EXAMINATION OF AIRWAYS A ROOF FALL WAS DISCOVERED ON 7-31-00 AT APPROX 8:00 AM THE FALL IS LOCATED IN #7 ENTRY OF #4 MAINS BEGINNING 1 BREAK INBY SPAD 502 & EXTENDEDING T O NEXT INTERSECTION INBY SPAD 502 & EXTENDING TO NEXT INTERSECTION INBY IN #7 ENTRY. APPROX 90'LX20'WX AND RANGING FROM 5' TO 8' T, 8 CRIBS & 8' INBERS WERE ALREADY PRESENT AREA WAS KNOWN TO