An unintentional roof fall occurred on Unit #2 at Entry #4 at 46+50. The fall occurred due to roof failure, cracks in the immediate strata. The fall was originally supported with 4 ft. conventional roof bolts. The fall is approximately 16 ft. wide and 16 ft. in length and 0 in. to 4 ft. high. The fall was cleaned up and resupported with longer roof bolts than originally installed.