A FIRE OCCURRED ON THE 10TH FLOOR OF THE COAL PREP PLANT. THE DURATION OF THE FIRE EXCEEDED 30 MINS. CONES WERE BURNED OFF THE CYCLONES IN THE MORNING. AT APPROS 2:30PM FLAMES WERE OBSERVED. THE FIRE WAS EXTINGUISHED AN INVESTIGATION WAS PERFORMED AND THE PLANT WAS FOUND SAFE TO RESUME NORMAL OPERATIONS.