A ROOF FALL OCCURRED AT #5 ENTRY 1 LEFT OFF N.W.MAINS AT SS#3305 MEASURING 18'X 30'X 8'. CONDITIONS CONTRIBUTING TO THE FALL WERE FAULT AREA ASSOCIATED WITH DIP-DETERIORATED. NO EQUIPMENT WAS INVOLVED. THE VENTILATION WAS NOT DISTURBED. NO INJURY OCCURRED. THE FALL WILL BE CLEANED UP.