AN UNINTENTIONAL ROOF FALL OCCURRED IN THE 4-WAY INTERSECTION OF ENTRY #3@15+70 6TH NORTH TRAVEL ROAD. THEY FALL 80'LX18 1/2' WX4 1/2"" THICK DID NOT IMPAIR VENTILATION BUT DID NOT IMPEDE TRAVE L. THE STOPPING LINE WAS SATOVER TO MAKE A TRAVEL ROAD. THE ROOF WAS SUPPORTED BY 4' FALL GROUNTED 100 BOLTS INSTALLED BY OUR CURRENT PLAN. THE INTERSECTION WAS DEVELOPED JOWANY 2001.