A ROOF FALL 100'L X 20'W X 8'H OCCURRED IN THE RETURN ENTRY AT SURVEY STATION 4391 AT THE TOP END OF THE NE MAINS. THIS LOCATION IS ABOUT 3000' OUTBY THE ACTIVE FACE OF MMU 002-0. NO INJURY OR DAMAGE TO EQUIPMENT OCCURRED. THE FALL IS NOT PLANNED TO BE CLEANED UP AT THIS TIME.