A ROOF FALL WAS DISCOVERED IN THE NO. 4 ENTRY 1 BREAK OUT BY SURVEY STATION NO. 88. THE FALL WAS AN INTERSECTION ABOUT 1000 FT OUT BY THE FACE OFF THE 001-0 UNIT AND MEASURED 20 FT WIDE BY 20 FT LONG BY 12 FT HIGH. THERE WERE NO INJURIES OREQUIPMENT INVOLVED AND VENTILATION WAS NOT AFFECTED.