Roof fall a entry 7 so. n.w. at 55 18 & 05 approx. 20"" lg, 16 ft wide 6 ft high. this area had previous roof sloughing off. then was dud is not now causing any effect on went. found to be fallen about the achorage gone on 4-6-04. 6' resin grouted rods, grey shale, rared stone. now alone anchorage gone