A ROOF FALL WAS FOUND BY THE FOREMAN IN THE EAST MAINS BETWEEN #19 AND XC #20 IN #2 ENTRY. IT MEASURED APPROXIMATELY 30' X 20' X 6'. THE AREA WAS MINED IN MAY 2000 AND WAS SUPPORTED BY TIMBERS AND 6' TENSION REBAR BOLTS. FALL WAS CAUSED BY AN UNDETECTED SLIP IN THE MINE ROOF.