ON MY WEEKLY RETURN RUN I DISCOVERED A ROOF FALLIN #9 ROOM FROM THE FACE OUT BY 60' FROM #117010INTERSECTION, THERE WAS A MUD SLIP FROM #8 ROOM WHICH WAS BOLTED WITH 4' AND 6' BOLTS ALL OTHER HAD 3' BOLTS. THE FALL WAS APPROX 60' LONG 18' WIDE AND 5-12' HIGH.