A ROOF FALL OCCURRED AT APX 11 PM IN THE #2 ENTRY OF NORTH MAINS STATION #73(9+10). THE CAVE IS APX 30 LONG 20' WIDE 15-20 HIGH. #2 ENTRY WAS BOLTED WITH 6' DOUBLE LOCK BOLTS UP TO WITHIN 10 F T OF THE CAVE. THIS AREA DRILL GOOD WHEN THE REBOLTING WAS DONE. THIS AREA WAS BOLTED WITH 4' FULLY GROUTED BOLTS.