An unplanned roof fall occurred at Imperial on 2/13/12. Location of the fall is #5 zone #5 belt #37 blk to #38 blk. There were no injuries, equipment damage or escapeways blocked due to the fall. All approaches to the fall have been dangered, cribbed and timbered off. 15' outby spad #8069. Fall dimensions: 50'L X 18'W X 6 1/2'H.