A FALL OF ROOF OCCURED IN THE WEST MAIN ENTRIES IN THE #7 ENTRY AT X CUT #45 APPROX. 7250 FT OUTBY #1 UNIT. THE FALL WAS APPROX. 50'X18'X7' THE AREA WAS SUPPORTED WITH 6 FT FULLY GROUTED BOLTS AND SUPPLEMENTAL SUPPORT OF CRIBS. DATE OF DEVELOPMENT WAS 10-12-98 CAUSE OF FALL WAS A HIDDEN SLIP.