(1ST OF 2 ROOF FALLS DISCOVERED THIS DATE.) A roof fall occurred in the 2 Main North in #2 entry in the intersection at cross-cut #26. Fall measured 20' x 20' x 6'. The area was supported with 6' tension rebar bolts & 6"" square timbers. Area was mined in Sept. 2000. An undetected slip was determined to be the cause of the fall.