AT APPROX. 1:10AM, A CITY WIDE POWER OUTAGE OCCURRED WHICH RENDERED THE HOIST INOP, DUE TO A BLOWN FUSE AT THE SUB-STATION. AT THAT TIME, 3 MEN WERE WORKING IN THE PRODUCTION SHAFT. UPON ARRIVING AT 1:25AM, COMMUN. WAS RE-ESTABLISHED WITH THE MEN USING A PORTABLE GENERATOR & ALL WAS WELL. POWER CO. WAS NOTIFIED IMMED. & THE MINE MNG. AT 2:10AM POWER WAS RESTORED.