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Published: February 18, 2022

Board Approves ColumbiaGrid 2015 Biennial Tranmission Expansion Plan

At their February 18, 2022 meeting, ColumbiaGrid’s Board of Directors adopted the 2015 Biennial Transmission Expansion Plan. The 2015 Biennial Plan looks at a ten-year planning horizon (2015 through 2024) and includes approximately 56 new transmission projects and enhancements, at an estimated cost of over $2.5 billion, over the ten-year planning horizon. The 2015 Biennial Plan document is posted on ColumbiaGrid’s website and can be found at (

For more information, please contact Paul Didsayabutra at [email protected]


Member: Chelan County PUD      Project: ColumbiaGrid     
Chelan County PUD

"Chelan PUD is a strong supporter of ColumbiaGrid and the work that’s accomplished through the transmission Planning and Expansion Functional Agreement (PEFA). As a result of that process, the mid-C utilities (Chelan, Grant and Douglas PUDs) and Bonneville Power Administration were able to reach an agreement that defined the need for a new transmission line, as well as determine who will construct, own and pay for the facility. Those difficult decisions were made successful through the expert and independent expertise of the ColumbiaGrid staff."
~~ Chad Bowman, Director - Transmission and Compliance