PPL Montana is now operating a completely renovated Rainbow Dam, just a few miles northeast of Great Falls.
The $230 million project marks the biggest investment in energy generation in the state since the Colstrip coal-fired power plant was built about 30 years ago.
PPL Montana Director of External Affairs David Hoffman said the new power house generates almost twice as much electricity as the old one. It’s enough to power about 45-thousand homes.
Construction on this renovation started back in 2009 and went fully online this past April.