Our Company

For more than 100 years, NorthWestern Energy has been committed to delivering safe, reliable and innovative energy solutions.

We serve gas and electric to customers in the western two-thirds of Montana and eastern South Dakota. We also have gas service in Nebraska, and serve electricity to Yellowstone National Park.

We own and operate a diverse generation fleet of wind, water, natural gas and coal-fired resources and the high-voltage electric transmission system and distribution system. We also own and operate natural gas production, transmission and distribution systems.

Enriching Lives Through a Safe, Sustainable Energy Future

A map showing NorthWestern Energy's service territory in Montana, Nebraska and South Dakota.

Enriching Lives Through a Safe, Sustainable Energy Future

NorthWestern Energy has provided reliable and affordable electricity and natural gas to customers in Montana, South Dakota and Nebraska for more than 100 years.

Our Commitment to Sustainability

Sustainability means meeting today’s needs while planning for tomorrow’s as well. It is not just a matter of good environmental practices, being a sustainable enterprise must also incorporate social and governance best practices.

Our vision

Enriching lives through a safe sustainable energy future.

Our mission

Working together to provide safe, reliable and innovative energy solutions that create value for customers, communities, employees, and investors.

Our values

SERVICE: Safety, Excellence, Respect, Value, Integrity, Community, Environment

Our Natural Gas and Electric Service

NorthWestern Energy serves 337 communities in Montana, South Dakota and Yellowstone National Park with safe and reliable electricity. We serve natural gas to 202 communities in Montana, South Dakota and Nebraska.

Our Hydro Facilities

Our carbon-free hydro system is the foundation of our energy generation portfolio in Montana. In 2023, 35.7% of our electricity for Montana customers came from our hydro facilities.

Giving Back to Our Communities

NorthWestern Energy is committed to being a good corporate citizen of all the communities we serve. In 2023, we gave nearly $2 million in charitable donations and community support.

Delivering a Bright Future

Employee Noel Jacobson wears a hard hat and smiles in Power Park.

Delivering a Bright Future

We won't stop working until the future is as bright as it can be.

Where Does Your Energy Come From?

We provide safe, reliable energy through a balanced mix of clean energy and traditional resources.

Thompson Falls Reservoir 16-foot draw down begins Oct. 6

Date: Sep 1, 2023

Thompson Falls, Mont. – Sept. 1, 2023 – On Oct. 6,  NorthWestern Energy will begin drawing down the reservoir at the Thompson Falls Hydro Development about 16 feet from the current full-pool level to replace wooden flash boards along the bottom 8.5 feet on the face of the main dam.  

“The wooden flash boards on the main dam have been in place for about 50 years,” said NorthWestern Energy Hydro Foreman Noel Jacobson. “The boards are leaking water which requires a high level of maintenance and frequent repairs. Replacing the boards will reduce maintenance and make the dam perform more efficiently.”

A 250-cfs (cubic feet per second) water leak through the dam, about 1,870 gallons per second, equals almost a megawatt of power, enough energy for about 650 homes a year.

The flashboards, located on the lower 8.5 feet of the main dam’s upstream face in front of steel I-beams, are used to seal water in the dam’s reservoir. Eight-foot drop panels on the upper 8 feet of the main dam control the release of the water through and across the dam to create conditions for maximum energy generation.

The reservoir water drawdown will begin Oct. 6 and work will begin Oct. 11. The construction project will involve removing the eight-foot drop panels to access the old boards and then replacing them with new ones. The reservoir will be back to full pool by Oct. 26.

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NorthWestern Energy - Delivering a Bright Future

NorthWestern Energy provides essential energy infrastructure and valuable services that enrich lives and empower communities while serving as long-term partners to our customers and communities. We work to deliver safe, reliable, and innovative energy solutions that create value for customers, communities, employees, and investors. We do this by providing low-cost and reliable service performed by highly-adaptable and skilled employees. We provide electricity and / or natural gas to approximately 764,200 customers in Montana, South Dakota, Nebraska, and Yellowstone National Park. We have provided service in South Dakota and Nebraska since 1923 and in Montana since 2002.


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