A ROCK FALL WAS FOUND IN THE NUMBER FOUR (4) ENTRY OF THE 3-WEST SUB-MAINS ON 8-9-2010, THE APPROXIMATE SIZE OF THE FALL WAS 20' WIDE, 20' LONG AND 10' HIGH. THE ROOF WAS A LAMINATED STACK ROCK, AND HAD BEEN SUPPORTED WITH 6' TORQUE TENSION AND 10' ROPE BOLTS.