AN UNINTENTIONAL ROOF FALL OCCURRED IN THE #4 ENTRY, 100' INBY SURVEY STATION 42498. THE FALL MEASURED APPROX 60' LONG X 18' WIDE (THE HEIGHT WAS UNDETERMINED). THE AREA OF FALL WAS EXPERIENCI NG ADVERSE GEOLOGICAL CONDITIONS. FALL WAS NOT ON AN ACTIVE SECTION & WILL NOT BE CLEANED UP.