AN UNINTENTIONAL ROOF FALL WAS DISCOVERED AT 12:45 PM. MSHA NOTIFIED BY PHONE AT 12:57 PM. FALL WAS IN 2ND WEST MAINS, ENTRY #5, X-CUT #36. FALL MEASURED APPROX, 18'W x 20'L x 5' TO 6'H. AREA WAS DANGERED OFF WITH BREAKER ROWS, AS NO TRAVEL IS REQUIRED IN THIS AREA.