ROOF FAILURE OCCURRED IN THE 4-LEFT, ENTRY #1 X/C #7. AN AREA 20' WIDE X 20' LONG X 15' HIGH WAS DISCOVERED BY THE WEEKLY EXAMINER. AIR, WATER & STRATA DETERATION CONTRIBUTED TO THE FAILURE OF AREA. REHABILITATION OF AREA IS UNDERWAY. THIS AREA IS INSPECTED BY THE WEEKLY EXAMINER. NO DISTURBANCE IN AIR FLOW HAS BEEN OBSERVED. AIR MOVEMENT IS DETECTED INBY & OUTBY THE FALL AREA.