# NorthWestern Energy to acquire Avista's interest in Colstrip coal plant

Avista Corporation will turn over its 222 MW interest in the Colstrip coal-fired power plant to NorthWestern Energy, effective December 31, 2025. Avista retains remediation obligations and enters a vote-sharing agreement.

- Type: Acquisition
- Announced: 2023-01-16
- Where: Colstrip, Montana, United States
- Status: announced
- Capacity: 222 MW generating capacity
- Products: coal-fired electricity
- Sectors: [Power Generation Equipment](https://endata.com/sectors/power-generation-equipment.md)

## Companies

- [Avista Corp.](https://endata.com/companies/28303.md) (target)
- [NorthWestern Energy](https://endata.com/companies/47165.md) (acquirer)

## Sources

- [investor.avistacorp.com](https://investor.avistacorp.com/news-releases/news-release-details/avista-and-northwestern-energy-enter-strategic-transaction), 2023-01-17: "This transaction is the result of several years of work and discussions among all owners of Colstrip, through which we have looked for commercial solutions that would allow Avista and others to exit Colstrip by the end of 2025."

---
Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.