Unintentional roof fall discovered on this date by company and MSHA officials. Fall was located at North West Mains, #2 hdg, 1 block outby spad 4471, block 8-9. Fall measured 20'L X 7'H 18'W. Area previously supported with 6' full grout resin bolts. Area was mined on or about 01/20/2006. Overburden about 260'.