An unintentional roof fall occurred in entry #3 between the 49+80 intersection and the 50+55 intersection in the first east panel off of the first north submain. The fall measured 25' x 18' x 4' high. It did not affect ventilation, passage of men or cause personal injury. It had been bolted with 4 foot fully grouted roof bolts.
U.S. Mine Safety and Health Administration