Latest News for: colstrip

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EPA repeals mercury regulations Colstrip owners considered impossible to meet

Missoulian 20 Feb 2026
In the U.S., roughly 170 coal-powered plants use the same technology as Colstrip. All of them had the needed filters equipped to address pollution except for Colstrip ... .
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NW deal on Colstrip broke law, PSC says

Ravalli Republic 10 Dec 2025
State regulators are attempting to assert control over NorthWestern Energy after the utility did not seek state approval in acquiring more coal-fired energy ... .
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PSC: NorthWestern 'illegally' transferred Colstrip shares

Missoulian 09 Dec 2025
BOZEMAN — State regulators are attempting to assert control over NorthWestern Energy after the utility did not seek state approval in acquiring more coal-fired energy ... .
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PSC: NorthWestern 'illegally' transferred Colstrip shares to an unregulated company

Missoulian 07 Dec 2025
NorthWestern Energy has long said that acquiring more Colstrip shares does not require Public Service Commission approval, but the commission disagreed in a federal filing ... .
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Commission: NorthWestern Energy 'illegally' transferred Colstrip shares to an unregulated company

Rapid City Journal 07 Dec 2025
NorthWestern Energy has long said that acquiring more Colstrip shares does not require Montana Public Service Commission approval, but the commission disagreed in a federal filing ....
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NorthWestern says PSC can’t regulate new Colstrip shares

Williston Herald 26 Nov 2025
NorthWestern Energy said a portion of the new Colstrip shares it will acquire on Jan. 1, 2026, will be transferred to a new subsidiary — one the utility said is not under the authority of the Public Service Commission ... .
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