AN UNINTENTIONAL ROOF FALL WAS DISCOVERED ON 6-19-00 AT 11:50 PM ON THE D-4 MAINS 001-0 MMU IN NO. 3 ENTRY INTERSECTION AT SURVEY STATION NO. 4747. THE AREA WAS DEVELOPED ON 6-2-00. THE FALL I S APPROX. 20 FT LONG X 20 FT WIDE X 7 FT HIGH. THE FALL CONTAINUED 5 FT RESING TENSION BOLTS. THE FALL HAS BREN DANGERED OFF AND ADD AND SUPPORT WILL BE ADDED IN THIS AREA.