Bowmont to Hubbard Transmission Line

Project Need

Idaho Power is committed to providing reliable energy to customers in the Treasure Valley. That’s why we’re proposing transmission upgrades in southern Ada County and Kuna. These upgrades will deliver more reliable, affordable, clean energy to customers across the region while increasing capacity and reducing the chance of outages.

In 2012, community leaders identified these improvements as important to the region in the Eastern Treasure Valley Electrical Plan. The plan forecasts energy demand and reliability needs, and addresses them through long-term planning. A community advisory committee made up of business leaders, government officials and other stakeholders helped draft the plan, including concepts that led to the Bowmont to Hubbard project.

These projects will help Idaho Power meet the needs of current and future residents, farms and businesses in south Ada County. They’ll improve service year-round, especially during hot summer days when energy demand peaks.

Bowmont to Hubbard Project

The Bowmont to Hubbard project will upgrade an existing 138-kilovolt (kV) line with a new 230-kV circuit that connects Idaho Power’s Bowmont Station south of Nampa to the Hubbard Substation east of Kuna. Many sections of the line will be double circuits, meaning the new 230-kV line will be on the same poles that hold the existing 138-kV line.

The upgraded Bowmont to Hubbard line will bring more energy into the region from Boardman to Hemingway (B2H), scheduled for completion in 2026 or later.

The Bowmont to Hubbard upgrade will be built mostly inside Idaho Power’s existing rights-of-way and easements. Where needed, Idaho Power will negotiate new easements with landowners after receiving permits from Ada County and the city of Kuna.

How long will this project take?

Idaho Power is working with local customers, Ada County and the city of Kuna to obtain permits for the Bowmont to Hubbard upgrade. Ada County and the city of Kuna will each hold public hearings on the project. These hearings are open to the public. Testimony is encouraged.

People who own property within 1,000 feet of the upgraded line will receive hearing notices from Ada County and the city of Kuna.

Construction is scheduled to begin in 2023. It will take place in three phases, with each phase lasting approximately one year.

More information

Bowmont to Hubbard fact sheet

Bowmont to Hubbard FAQs

If you have questions or comments about the Bowmont to Hubbard project, please contact:

Facility Siting Coordinator Jeff Maffuccio

Or mail your questions to:
Idaho Power
P.O. Box 70
Boise, ID 83707

For assistance with a PDF on this page or to request a PDF in an alternate format, please contact Customer Service at 208-388-2323 or 1-800-488-6151