Segment A - Wallula to McNary

Project Overview

The project was initiated and completed to support continued reliable, safe and cost-effective electricity to customers, provide needed customer transmission service, and support new renewable energy development. Construction of the line was initiated in Q2 of 2018 of the new transmission line between our Wallula Substation in Washington and Bonneville Power Administration’s McNary Substation near Umatilla, Oregon. The transmission line was originally planned to also connect Wallula with an existing substation in Walla Walla Washington. That section, however, is not scheduled to proceed at this time. The 30-mile, 230-kilovolt line between Wallula and McNary was constructed on a 125-foot-wide right-of-way. We worked to minimize impacts to the community and local environment during project development, construction and maintenance.

Project Timeline

  • Placed in service - January 31, 2019

(Updated March 2019)