AN UNINTENTIONAL ROOF FALL OCCURRED IN THE 4-WAY INTERSECTION OF ENTRY 7 AT 6+60 IN THE 6TH NORTH. THE FALL 80' LONG, 19' WIDE AND 6' THICK. DID NOT IMPAIR VENTILATION OR IMPEDE TRAVEL. THE RO OF WAS SUPPORTED BY 4FT FULLY GROUTED RESIN TYPEROOF BOLTS INSTALLED BY OUR CURRENT ROOF CONTROLPLAN. THE INTERSECTION WAS DEVELOPED DEC. 2000.