Approx. 12:40 pm on 8-23-18 the Mine Foreman discovered a prior roof fall at 258 1/2 block in the 6 North Left Return had continued to deteriorate. The fall is now approx. 16 ft.W x 20-25 ft. L & 12-14 ft. high. Initial fall was approx. 5-7 ft. high. No injuries, equipment damage, or impaired ventilation as a result of the fall.