A FALL WAS DISCOVERED IN THE #2 ENTRY OF 2 RIGHT OFF 2 MAINS WEST ABOUT 20' INBY SURVEY STATION 920. THE FALL MEASURED 60' LONG X 6' HIGH X 15' WIDE. THERE WERE NO INJURIES AND NO EQUIPMENT WAS INVOLVED. VENTILATION WAS NOT AFFECTED. THE FALL IS APPROX. 15,000 FEET OUTBY THE ACTIVE SECTION.