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Published: April 25, 2011

Updated Puget Sound Area Transmssion Expansion Plan

ColumbiaGrid’s Puget Sound Area Study Team has updated its 10-year Transmission Expansion Plan for the Puget Sound Area.  The plan was developed to provide economical and reliable service to Puget Sound Area load while minimizing the risk of curtailing power transfers between the Northwest and Canada.  The update was developed to study additional alternative projects suggested for the area and to study significant system changes that occurred since the last report was finalized.  The update is available on the CG website at


Member: Avista Corporation      Project: ColumbiaGrid     
Avista Corporation

"In ColumbiaGrid, we now have the ability to resolve the three fundamental transmission questions: What transmission facilities should be built? Who should build them? Who should pay for them? With ColumbiaGrid's independent staff and process to resolve disputes, we can answer these questions effectively and in a timely fashion to facilitate our region's new resource development needs."
~~ Jeff Schlect, Manager, Transmission Services, Avista