AN UNINTENTIONAL ROOF FALL WAS DISCOVERED IN #7 ENTRY OF 4LT 1NORTH SECTION (MMV 072) SURVEY 11+92. THE AREA IS A SUBNORMAL ROOF AREA WITH CLAY VEIN. FALL WAS ON SECTION TRACK AND HIGH VOLTAGE CABLE CAUSING SEVERAL HOURS OF PRODUCTION LOSS. APPROACHES ARE SUPPORTED AND DANGERED OFF. FALL CAVITY 8'HIGH, 17'LONG AND 17'WIDE.