A ROOF FALL HAS OCCURRED BEGINING IN THE INTERSECTION OF #6 ENTRY, SPAD 6 & 30 TO 5 & 60 OF THE 1ST SUBMAIN NORTHWEST. THE FALL FELL 15' TO 20' WHICH WAS A CONTINUATION OF PREVOIUS FALL, AND WAS 18' WIDE AND 15' HIGH. THERE WERE NO INJURIES. AREA WILL BE RESUPPORTED.