WHAT WAS BELIEVED TO BE PLUMES OF SMOKE & STEAM WERE OBSERVED FLOWING FROM THE SLURRY BOREHOLE THAT PENETRATES AN AREA OF THE MINE. THIS AREA IS ABANDONED & IS NO LONGER VENTILATED. ALL UNDERGROUND PERSONNEL WERE EVACUATED FROM THE MINE & AN INVESTIGATION WAS STARTED WITH MINE MGMT., MSHA, STATE & UMWA REPRESENTATIVES. THE INVESTIGATION IS STILL ONGOING.