Approved/Under Construction. Facility construction in Malheur County commenced in June 2025, in areas where the Department concurred that applicable preconstruction requirements had been satisfied. Preconstruction compliance is ongoing. Once preconstruction compliance concurrence is obtained from the Department for remaining work areas, construction is forecasted to continue through 2027.
On December 12, 2025, the Oregon Department of Energy (Department) received an Amendment Determination Request (ADR), pursuant to OAR 345-027-0357(3), from Idaho Power Company seeking a written determination on whether a site certificate amendment is needed to expand the micrositing corridor by 1.22 acres in Union County for road modifications. On March 23, 2026, the certificate holder withdrew a portion of the proposed changes, resulting in a reduction in proposed micrositing corridor expansion to 0.96 of an acre. The proposed expanded micrositing corridor is within the approved site boundary.
Two primary changes are proposed within the 0.96 acre micrositing corridor expansion area. Within the proposed expanded micrositing corridor, the certificate holder seeks approval to construct two new spur roads and a wider turn radius workspace in areas where slopes are greater than 30%.
On March 27, 2026, the Department issued a written determination, which is available in the “Project Timeline" below, and will be announced at the April 17, 2026 Council meeting.