A ROOF FALL OCCURRED INBY THE FEEDER LOCATION AT INTERSECTION 16+60 #5W. THE AREA WAS INITIALLY BOLTED WITH 6' FULLY-GROUTED RESIN BOLTS. SECONDARY SUPPORT WAS ADDED BY INSTALLING 10' CABLE BOLTS (VERTICAL). FALL PEAKED AT 15' HIGH. WATER IS BELIEVED TO BE A FACTOR IN THE CAUSE OF THE FALL. A SLIP WAS EXPOSED AT THE 10' LEVEL.