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Published: February 22, 2017

2017 Biennial Transmission Expansion Plan Posted

Board Approves ColumbiaGrid 2017 Biennial Transmission Expansion Plan

At their February 15, 2017 meeting, ColumbiaGrid’s Board of Directors adopted the 2017 Biennial Transmission Expansion Plan. The contents of the plan include summaries and conclusions of major activities that occurred during the biennial cycle, including activities after adoption of the 2016 Update to the 2015 Biennial Transmission Expansion Plan, such as additional Order 1000 activities (regional and interregional), the 2016 System Assessment, formulation of a ten year plan, sensitivity studies, transient stability studies, and economic planning studies. “I am very happy with the 2017 Biennial Transmission Expansion Plan. Our team of experts has developed a very detailed and thorough plan,” said Paul Didsayabutra, ColumbiaGrid’s Manager of Grid Planning.

The 2017 Biennial Transmission Expansion Plan document is posted on ColumbiaGrid’s website and can be accessed by clicking on the following link: 2017 Biennial Transmission Expansion Plan

For more information, please contact Paul Didsayabutra at


Member: Tacoma Power      Project: ColumbiaGrid     
Tacoma Power

"As a charter member of ColumbiaGrid, Tacoma Power has observed the benefits for its customers of regional transmission planning. Engaging in the ColumbiaGrid collaborative transmission planning process has fostered diverse and innovative solutions. This open process for identifying and resolving transmission challenges has delivered cost-effective reliability to our entire region."
~~ William A. Gaines, Director of Utilities