A ROOF FALL WAS FOUND ON 4/12/04. IT WAS DETERMINED THAT THE FALL OCCURRED ON 4/9/2004 IN THE RETURN AIR LEG OF THE WHITTAKER PORTAL FAN. THE FALL MEASURED 15.5' WIDE X 15' IN LENGTH X 6' HIGH. THE AREA WAS MINED IN JUNE OF 1976 AND WAS SUPPORTED WITH CONVENTIONAL ROOF BOLTS, POSTS, CRIBS AND PLANK.