B2H Transmission Line Project page header
Idaho Power Boardman to Hemingway Transmission Line Project Header image

Project Information

The Boardman to Hemingway Transmission Line Project (B2H Project) is important to the Northwest and Intermountain West regions. Transmission paths are key to exchanging electricity between these regions, depending on which area is experiencing the highest demand.

Idaho Power anticipates the B2H Project will:

  • Enable transportation of low-cost energy from various generation sources in the Northwest and Intermountain West to serve homes, farms and businesses in both regions, including allowing excess wind generation to flow throughout the regions to where it is needed.
  • Improve system reliability and reduce constraints on the regional transmission system as demand for energy continues to grow.
  • Connect the Intermountain West with the Northwest power grid to meet seasonal energy demands.

The new 500 kV transmission line would run from a proposed substation in northeast Oregon to the Hemingway Substation in southwest Idaho.

Idaho Power is working with BLM and USFS during their environmental review and analysis and with ODOE-EFSC to permit and construct this project.

Planning the B2H Project

Idaho Power first identified B2H as a cost-effective means for providing reliable service in its 2006 Integrated Resource Plan (IRP). The IRP is a roadmap describing how Idaho Power plans to meet current and future energy needs over the next 20 years.

Each IRP describes the company’s projected need for additional electricity and the resources necessary to meet that need while balancing reliability, environmental responsibility, efficiency, risk and cost. Securing the necessary resource infrastructure is a significant component of providing reliable service to customers.

Idaho Power enlists the assistance of its customers in developing the IRP through an advisory council — the Integrated Resource Plan Advisory Council. IRPs are submitted to both the Idaho and Oregon public utility commissions for acknowledgement. In 2017, both commissions recognized B2H as a preferred resource.

Visit Idaho Power’s Planning page for information on the IRP process, as well as to view to the most recent edition.


The Bonneville Power Administration (BPA) and PacifiCorp are exploring joint participation with Idaho Power on the B2H Project as they evaluate options for meeting demand throughout their service territories. Agreements, signed Jan. 12, 2012 by the three, provide funding for environmental review and permitting. The agreements also ensure continued consideration of the project but do not commit participation in construction.

About BPA

BPA is a non-profit federal agency that markets renewable hydropower from federal Columbia River dams, operates three-quarters of the high-voltage transmission lines in the Northwest and funds one of the largest wildlife protection and restoration programs in the world. BPA and its partners have saved enough electricity through energy efficiency projects to power four large American cities. For more information, contact us at 503-230-5131 or visit our website at www.bpa.gov.

About PacifiCorp

PacifiCorp is one of the lowest-cost electricity producers in the United States, serving more than 1.7 million customers in the West. PacifiCorp operates as Pacific Power in Oregon, Washington and California, and as Rocky Mountain Power in Utah, Wyoming and Idaho. With a generating capability of more than 10,620 megawatts from coal, hydro, gas-fired combustion turbines and renewable wind and geothermal power, the company works to meet growing energy demand while protecting and enhancing the environment. For more information, visit www.pacificorp.com.

This website is the joint Boardman to Hemingway Transmission Line Project site. Information contained on this site is approved for posting by Idaho Power. Visit the Idaho Power website.