AN UNEXPLAINED ROOF FALL WAS DISCOVERED ON THIS DATE AND TIME WHILE CONDUCTING AIRWAY TRAVELS OF THE #2 INTAKE ENTRY. 1 BROKE OUTBY SPAD #358(THIS FALL IS A CONTINUATION OF A PREVIOUS FALL 01- 05-01) AREA OF FALL MEASURED APPROX. 15'W X 17'L X 8'H AND WAS SUPPORTED WITH 5' RESIN. FALL APPROX. 7000' FROM BASE AND WILL NOT BE CLEANED UP.