On August 8, 2009 an unintentional roof fall occurred at the 48+50 plus marker of the main east entries track entry. The roof fall measured approximately 50' long x 14' high & 17' wide. The fall did not cause any injuries, no entrapments and ventilation was not disturbed. The area had been supported with conventional roof bolts, crossbeams with lagging and 12' cable bolts.