A roof fall occurred in the 1 Main East in the intersection of #4 entry at cross-cut #12 and extended part of the way through the pillar line between #4 entry and #5 entry measuring approximately 40ft. x 19ft. x 6ft. The area was supported with 6 foot tension rebar bolts. An undetected slip was determined to be the cause of the fall. This area was mined in February 2004.