A ROOF FALL OCCURRED IN THE LAST OPEN XCUT, LOCATED BETWEEN THE NO. 4 AND 5 ENTRIES OF THE MMU 001-0. THE FALL WAS APPROXIMATELY 30' TO THE RIGHT OF SURVEY STATION NO. 159 AND MEASURED APPROXI MATELY 16' LONG X 18' WIDE X 8' THICK. THERE WERE NO INJURIES OR EQUIPMENT INVOLVED. VENTILATION WAS NOT AFFECTED.