A Roof Fall occurred in the Main West #1 (Return) Entry, just inby crosscut #18. The fall is 16 ft. wide by around 60 feet long, and around 6 ft. high in the highest spot. No one was injured or entrapped and no Ventilation was interrupted or blocked. Access was physically blocked. A 103(k) Order was issued. When approval was given, Timbers were installed on both sides.