A ROOF FALL OCCURRED IN THE 12TH EAST, #4 ENTRY AT 3700' STATION. THE FALL WAS 30' LONG, 20' WIDE, AND 9' HIGH. IT DIDN'T AFFECT VENTILATION, TRAVEL OR CAUSE ANY INJURY. IT DID DAMAGE SOME BEL T STRUCTURE. THE AREA WAS BOLTED WITH 8' POINT ANCHOR BOLTS.