A ROOF FALL OCCURRED AT THE 3RD WEST PARALLEL RETURN ENTRY #4 AT 9350'W. THE FALL TRAVELED OVER TO THE #3 AND #5 ENTRIES. THE FALL IS APPROXIMATELY 100'L X 18'W X 10'-15'H. THE FALL WILL NOT BE CLEANED UP. THE TYPE OF ROOF SUPPORT WAS 6' AND 10' POINT ANCHOR ROOF BOLTS.