HELENA — At the end of the year, NorthWestern Energy is set to take over majority ownership of the Colstrip power plant. Now, the company is asking regulators to sign off on their plans for the newly acquired power, but some opponents are claiming the deals haven’t gotten the oversight they should.

(Watch the video to see more on NorthWestern's plans for its new larger ownership stake in Colstrip.) NorthWestern Energy goes to regulators with plans for larger ownership share in Colstrip plant

The coal-fired Colstrip Steam Electric Station has a complex ownership structure, with six energy companies holding shares. Currently, NorthWestern controls 222 megawatts of electricity, or 15% of the plant’s generating capacity. Starting Jan. 1, 2026, they will acquire another 222 megawatts cur

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