Boardman to Hemingway reports more than 300 foundations and structures built

Construction of the Boardman to Hemingway transmission project has entered its main production phase, with Idaho Power reporting more than 300 foundations and structures built in its 2026 update.

The utility says all access roads and foundations, plus more than half the structures, are scheduled for completion by the end of the year. Its stated target is to finish construction and energize the project in late 2027.

The current field activity follows access-road construction that began in June 2025 and the first completed structures that October.

Idaho Power’s project history also records the ownership arrangement: PacifiCorp holds 55 percent and Idaho Power 45 percent, with a separate provision for Bonneville Power Administration’s use of the line.

The milestones offer a more useful delivery picture than a general statement that transmission is under construction. Access, foundations and erected structures each expose a different part of the work sequence.

For utilities planning around a future connection, energization remains the date that converts construction progress into a usable network asset. It is still a scheduled milestone rather than a completed outcome.

The next updates should help show how field production advances toward the remaining installation and completion work. Following those intermediate measures gives customers and delivery partners a clearer basis for assessing schedule confidence.

Reporting source: Idaho Power project history, 2026 update. Sources reviewed September 30, 2026. Delivery implications are Infraday analysis.

Illustrative photograph; it does not document the announced work. High-voltage transmission tower; representative photograph. Photo: Novoklimov / CC BY 4.0. No editorial alterations; WordPress may resize or crop for display.