A roof fall in the 1 South in the #4 entry in 1/2 the intersection of cross-cut #22 extending through 1/2 the pillar-line towards cross-cut #23 measuring 35ft. x 19ft. x 6ft.-9ft. This area was mined in April 2004 and supported with 6ft. tension rebar bolts and 9ft. mega bolts. This fall was caused by an undetected slip.