ROOF FALL OCCURRED SOMETIME BETWEEN 12:00 AM ON 11-4 AND 9:00 PM 11-5. FOUND BY MINE FOREMAN DOING PRESHIFT FOR 11:00 PM MIDNIGHT SHIFT (SUN-MON) APPROX 6' HIGH 100' LONG IN BY INTERSECTION OF B-13 TO JUST INTO INTERSECTION 13-15 OF 5 RIGHTOFF OF 1 LEFT. FALL WAS POSTED AND DANGERED OFF.