NorthWestern Energy Upgrading Natural Gas Transmission Line near Helena

Helena, Mont. - Aug. 14, 2026 - NorthWestern Energy is upgrading approximately 5.5 miles of natural gas transmission pipeline from the Silver City area near Lincoln Highway south to the Helena Junction area. The project will strengthen the natural gas infrastructure that serves customers in the Helena area.

The project, located west of Birdseye Road, replaces existing 40-year-old natural gas transmission pipeline within the existing pipeline easement.

The permits required for the project are secured. Construction started the third week in July and is expected to be completed about mid-October.

Natural gas transmission pipelines transport natural gas from supply sources to local distribution systems that serve homes, businesses and communities.

After the upgraded pipeline is installed, NorthWestern Energy will restore the project area.

Upgrading the pipeline in this section will:

• Support safe and reliable natural gas service for customers in the Helena area.
• Maintain the infrastructure that delivers natural gas to homes, businesses and communities.
• Improve the long-term reliability of the natural gas system.
• Meet federal pipeline safety requirements.
• Support reliable energy service for current and future customers.

By upgrading this section of pipeline, NorthWestern Energy is strengthening the infrastructure that customers depend on for natural gas service.

Follow us on Facebook and LinkedIn and Instagram: @NorthWesternEnergy

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 850,300 customers in Montana, South Dakota, Nebraska, and Yellowstone National Park. Our operations in Montana and Yellowstone National Park are conducted through our subsidiary, NW Corp, and our operations in South Dakota and Nebraska are conducted through our subsidiary, NWE Public Service. We have provided service in South Dakota and Nebraska since 1923 and in Montana since 2002

Media Contacts:

Jo Dee Black

866-622-8081

[email protected]