Billings Rimrock Substation Rebuild

The Rimrock Substation upgrade was a $34 million project to increase capacity to provide service for increased energy demand in the Billings area.

Reliable service for a growing community

Rendering of the Billings Rimrock Substation rebuild

Reliable service for a growing community

Growth is strong in Yellowstone County, and NorthWestern Energy invested almost $76 million in electric system upgrade projects to support population and industrial growth and increase energy service reliability for our customers.


Rendering of the Rimrock substation

The $34 million Rimrock Substation upgrade was completed in 2023 and increased capacity to provide service for increased energy demand in the Billings area. Redundancy enhancement also improved reliability for customers.

For more information on this project, contact: