NorthWestern Energy announces agreement to acquire Puget Sound Energy's share of Colstrip Plant

Effective Jan. 1, 2026, NorthWestern Energy will acquire, at no cost, Puget Sound Energy’s 370 megawatt share of the Colstrip Plant

The acquisition at no cost will allow us to leverage existing infrastructure that is well established, dependable, reliable and consistently available when our customers need energy the most.

We are working hard to keep energy costs affordable knowing that many Montanans live on fixed incomes and are managing other life expenses.

This 370 megawatt additional share of the Colstrip Plant presents an affordable opportunity that benefits our customers beginning on Jan...