A ROOF FALL WAS DISCOVERED AT APPROXIMATELY 10:58 AM IN THE NUMBER 1 ENTRY INBY SPAD 1617 IN THE 3RD LEFT PANEL BLEEDER. NO PERSONS NOR VENTILATION WERE AFFECTED. THE FALL IS APPX. 150 FEET LONG X 20 FEET WIDE X 5 FEET HIGH. THE FALL WILL NOT BE CLEANED UP AND A PLAN TO RELOCATE THE BMP'S HAS BEEN SUBMITTED TO MSHA.