The lights went out at all the businesses and residences on an entire block of Main street, just before nine a.m. Traffic lights were out as well.
The outage left scores of kids in the dark at the Maine Discovery Museum Summer Camp. Many restaurant owners had to turn away customers who were looking for certain items on the menu.
Officials at Bangor Hydro say the outage was caused by a faulty underground circuit.
Most folks had their power restored by 11:30 a.m.