Unintentional roof fall discovered this date. Area previously mined on or about 10/18/06 and was supported with 6' full grout resin bolts. Fall measured approximately 18'W X 75'L X 6'H. Fall location is 15 Zone, 11 block, Xct 8-9 & 9 Intersection 2 blocks inby station 2490. Overburden is at or about 280'.