INTERSECTION OF #4 MAINS #1 ENTRY AND 4 LEFT PANEL BELT ENTRY (SPAD #545). WAS NOTICED TO BE WORKING BY SECTION FOREMAN WHILE MAKING FIREBOSS RUN. INTERSECTION FELL AT APPROX. 9:00 AM. AREA WA S CRIBBED OFF TO PREVENT ACCESS AND ADDITIONAL CRIBS WERE SET IN SURROUNDING AREAS OF QUESTIONABLE APPEARENCE.