AN UNINTENTIOINAL ROOF FALL DISCOVERED BY FIREBOSS IN PRIMARY ESCAPEWAY, INT. OF XC #5, #1 ENTRY, 1ST N. SUB-MAINS. 35' L x 20' W x 5'-6' H, DOME. TIMBERS, CRIBS, J-CHANNEL PLACED AROUND ROOF FALL. PRIMARY ESCAPEWAY RE-ROUTED, MARKED ON MAP & CREWS TRAINED ON CHANGE. THE FALL WAS IN AN AREA BOLTED W/5' BOLTS PRIOR TO CHANGE TO 6' BOLTS. FALL WAS REPORTED TO PRICE FIELD OFFICE.