A ROOF FALL OCCURRED IN ENTRY #2 OF THE 2ND N.E. MAINS @ SURVEY STATION 21 + 00. THE FALL MEASURED 70' LONG X 18' WIDE X 9' THICK. THIS AREA HAD BEEN SUPPORTED WITH 9' DOUBLE LOCKS AND 6' FULLY GROUTED RESIN BOLTS. ALL APPROACHES HAVE BEEN TIMBERED OFF.