ROOF FALL ABOVE ANCHORAGE IN MAIN NORTH # 1 ENTRY CROSSCUT #17 AREA WAS MINED MARCH 1984 AND WAS NEAR AN INTERSECTION THAT WAS PREVIOUSLY SHUT DOWN FOR OVERCAST CONSTRCUTION. HIGHT VOLTAGE LINE WAS UNDER THE FALL SO SOME POWER WAS LOST AND IMMEDIALTELY DISCOVERED AS INVESTIGATION AS TO REASON OF POWER OUTAGE.