An unintentional roof fall occurred on the 4C neutral entries at #8 entry 9+80 1st. south sub-main off east sub-main. It measured 25'x 25'x6'. It did not affect ventilation, passage of men or cause personal injury. The area will not be cleaned up. It had been supported with 6 foot fully grouted roof bolts.
U.S. Mine Safety and Health Administration