AN UNINTENTIONAL ROOF FALL OCCURRED ON 9/15/01 IN THE #4 ENTRY (BELT) AT BREAK 128 INTERSECTION ON #7 BELT. FALL WAS 12""HIGH X 25'LONG X 25'WIDE. FALL OCCURRED ON BELT LINE. NO EQUIPMENT OR PE RSONNEL WERE INVOLVED AND THERE WERE NO INJURIES. THE AREA HAD BEEN BOLTED WITH 6'TENSION REBAR AND 9'CABLE BOLTS.