AN UNPLANNED ROOF FALL OCCURRED IN THE #4 ENTRY OF 6 SOUTH AT SURVEY STATION #3020. FALL WAS FOUND BY MINE EXAMINER WHILE DOING PRE-SHIFT EXAM. FALL WAS APPROX 18'H, 30'L, 19'W. FALL HAD TO BE CLEANED UP AS IT WAS LOCATED ON THE PRIMARY ESCAPEWAY. FALL WAS CLEANED UP BY 3/16/00.