A ROOF FALL OCCURRED AT INTERSECTION 1 NORTH / 1 WEST. A SECOND FALL OCCURRED 4/27/03 AT INTERSECTION 0 2 NORTH. THE EXACT CAUSE OF ROOF FALL IS UNKNOWN. TECHNICAL EXPERTISE FROM PRIVATE AS WE LL AS MSHA WILL YIELD MORE INFORMATION. BOTH FALLS OCCURRED ABOVE THE ANCHOR ZONE.