FALL WAS FOUND DURING WEEKLY EXAM OF RETURN AIR COURSE TRAVELWAY WAS NOT BLOCKED, ALL ENTRANCES TO FALL HAVE BEEN TIMBERED OFF, THIS AREA ROOF CONSISTS OF LAMINATED AND STACK SAND STONE, SAND STONE SEPERATED ABOVE ROOF BOLT ANCHORAGE ALLOWING ROOF TO FALL, DEVELOPMENT OF THIS AREA WAS 9/14/01, ROOF CONTROL PLAN CHANGED OCTOBER 2001.