Unintentional roof fall in unused entry. Fall location is 1st West mains inby spad 325. Fall measured approx. 16'W x 70'L x 5.5' high. Area was supported by 48"" resin bolt. No injuries, no equipment damaged & ventilation not interrupted. Fall was dangered off. No plan of moving the fall at this time. Time of the fall was approx. Fall was discovered later during day. Inactive mine.