AN UNINTENTIONAL ROCKFALL OCCURRED ON 1-13-01 IN THE #4 ENTRY AT #87 BREAK. FALL WAS APPROXIMATELY 60'L X 45'W X 6-8'H. NO INJURIES, #3 MOBIL BRIDGE WAS CAUGHT, VENTILATION WAS NOT INTERUPTED. THE AREA HAD BEEN BOLTED WITH 5' FULLY GROUTED RESIN BOLTS. FALL WILL BE CLEANED UP.