Unintentional roof fall was found in a return off our 2 Left Mining section. The area where the fall occurred was bolted with 5 foot resin rods with draw rock pans as needed. The fall occurred in the 45th c-cut on 1 left panel between the #6 & #7 entries. Fall measure 20 feet wide at widest point and approx. 45 to 50 feet long and 5 foot high at the highest point.