The Boardman to Hemingway Transmission Line is an approved, not yet constructed, facility that includes an ASC approved route approximately 270.8-mile-long single-circuit 500-kV electric transmission line that crosses five counties in Oregon, Morrow, Umatilla, Union, Baker, and Malheur counties. The approved facility also includes four ASC alternative routes of approximately 33.3 miles of transmission line. The RFA1 approved routes include four alternative 500-kV transmission line routes equaling approximately 8.8 miles. The approved facility also includes roads, communication stations, the Longhorn Station, and temporary construction areas.
Under review/Approved. On September 27, 2022, Council approved the Final Order on ASC and issued a site certificate for the facility. On September 22, 2023, Council approved the Final Order on RFA1 and issued the first amened site certificate. The approved but not yet constructed facility has a construction commencement deadline of October 6, 2026.
On June 30, 2023, the Department received a Preliminary Request for Amendment 2 (pRFA2) to the Boardman to Hemingway Transmission Line Site Certificate from the certificate holder. pRFA2 seeks Council approval to add area to the site boundary to allow siting of previously approved facility components in new locations, as well as a proposed midline capacitor station in the previously approved site boundary in Union County. The proposed site boundary additions include approximately 40.2 miles of 500-kV transmission line alternatives in each of the five affected counties, 135.5 miles of new or substantially modified access roads, and the addition of temporary construction work area alternatives. pRFA2 also includes requests to amend specific site certificate conditions. pRFA2, pRFA2 attachments and figures, and the Public Notice of the pRFA2 are available on the Timeline below.
Morrow, Umatilla, Union, Baker, Malheur, Owyhee (Idaho) counties.
Idaho Power Company|
|Applicant/Certificate holder contact: