AN UNINTENTIONAL ROOF FALL OCCURRED IN THE X-CUT BETWEEN ENTRIES 3 & 4 AT THE 36+10 LOCATION ON THE 2ND MAIN EAST. THE FALL 20' LONG, 17' WIDE AND 4 1/2' THICK. DID NOT IMPAIR VENTILATION OR I MPEDE TRAVEL. THE ROOF WAS SUPPORTED BY 4' GLUE BOLTS INSTALLED ON OUR CURRENT APPROVED PLAN. THE X-CUT WAS DEVELOPED IN FEBRUARY 1999.