An unintentional roof fall occurred in the return of MMU 001 on 3 north 8 panel. It fell from 1 thru 5 entry 30 feet outby S/S 10720 in #3 entry. The roof fall measured approx. 18' wide by 250 long at a undetermined height. The exact cause of the fall is unknown but due to other caves occurring in this area previously the operator is abandoning any further mining in this area.