AN UNINTENTIOANL ROOF FALL OCCURRED IN THE X CUT BETWEEN ENTRIES #1&2 AT THE 75&35 X CUT INT HE 2ND MAIN EAST ENTRIES. THE FALL 50 FT LONG 19 FT WIDE AND 5 FT THICK DID NOT IMPAIR VENTILATION OR IMPED TRAVEL. THE ROOF WAS SUPPORTED BY 4 FTFULLY GRANTED ROOF BOLTS. THE X CUT WAS DEVELOPED SEPT. 2000.