AROUND 10AM IT WAS REPORTED THAT THERE WAS ""SMOKING"" COAL AT THE BOTTOM OF COAL SILO. HOT ENOUGH TO BE MELTING FEEDER BELT. WE IMMEDIATELYSTARTED PUTTING WATER ON AT THE TOP OF THE SILO AND AT THE BOTTOM. WE OPENED THE EMERGENCY DUMP CHUTE AND EMPTIED APPROX. 400 TONS OF COAL ONTO THE GROUND. ONLY DAMAGE WAS TO FEEDER BELT. NO INJURIES.