A roof fall occurred in the 1 South, #8 entry in one-third the intersection of cross-cut #36 and extending in the pillarline 6ft. towards cross-cut #37. The fall measured approximately 12ft. x 19ft. x 6ft.-9ft. Six foot tension rebar bolts and 9 foot mega bolts were used to support the area. An undetected slip was determined to be the cause of the fall.