AN UNINTENTIONAL ROOF FALL WAS DISCOVERED ON 8-2-01 IN THE #5 HEADOING IN TAKE AT #120 BREAK. FALL WAS APPROX. 18' WIDES 20' LONG X 5' HIGH INTERSECTION. NO INJURIES NO EQUIPMENT CAUGHT VENTIL ATION WAS NOT INTERRUPTED. THE AREA HAD BEEN BOLTED WITH 6' TENSION REBAR BOLTS.