A ROOF FALL WAS DISCOVERED IN THE NO.1 ENTRY OF TG-101. THE FALL IS BETWEEN XC 27 & 28. THE FALL IS APPROXIMATELY 50 FT LONG BY 20 FEET WIDE BY 18 FEET HIGH. THE AREA HAD BEEN SUPPORTED BY 8 F T TORQUE TENSION BOLTS SUPPLEMENTED WITH WIRE MESH. THERE IS EVIDENCE OF SLICKEN-SIDED MATERIALS IN THE UPPER PORTIONS OF THE FALL.