8:50 PM POWER WAS TRIPPED THROUGHOUT TR MINE SITE, DUE TO ICE BUILD UP ON LIGHTING ARRESTORS. 9:05 PM BACKUP GENERATORS WERE STARTED. 10 PM SWITCHED TO GEN POWER. ONE PERSON ON SKIP WAS BROU GHT TO SURFACE. PERSON WAS ABLE TO COMMUNICATE WITH HOISTMAN BY LEAKY FEEDER RADIO ON SKIP. 11:00 PM REG GROUND WAS BROUGHT TO SURFACE. 2:30 AM RESTORED MAIN POWER.