ROOF FALL WAS DISCOVERED BY FIRST SHIFT FOREMAN AT 6:30 AM. FALL OCCURRED AT X-CUT 40 #1 ENTRY OF THE HATFIELD MAINS. THIS IS A KNOWN FAULT AREA AND HAD BEEN PREVIOUSLY CRIBBED AND DANGERE D OFF. FALL MEASURED 50' LONG 29' WIDE BY 12' THICK. NO DAMAGE, VENTILATION NOT AFFECTED.