About the Power Grid

The high-voltage transmission systems owned by ColumbiaGrid’s members and participants make up a substantial network.  This network provides bulk transmission service to meet the demands of electricity customers within a quarter-million square mile footprint in the states of Oregon, Washington, Idaho, Montana and California. Click here to open a map of the FERC Order 1000 Transmission Planning Regions.

The ColumbiaGrid participants own nearly 22,000 miles of transmission at voltages greater than 100 kV.  Our members and participants interconnect with other major transmission networks in Canada and the Western states and are well positioned for wholesale transactions.

The ColumbiaGrid facilities are likely to change over time as new members and participants come on board.  Our vision for the future includes attracting additional entities that generate, transmit, or deliver power in the states listed above, as well as in the Canadian provinces of British Columbia and  Alberta.      


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