About the Power Grid

ColumbiaGrid map iconClick Here for a map of the network owned and operated by ColumbiaGrid's transmission planning participants. >>

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, California, Wyoming, Nevada, and Utah.

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: Seattle City Light      Project: ColumbiaGrid     
Seattle City Light

"ColumbiaGrid plays an important leadership role with the Northwest's public and private utilities and the Bonneville Power Administration. It allows for critical collaboration that benefits all our customers. As a member of Columbia Grid, Seattle receives a direct benefit from working together to address the issues that threaten the safe and reliable operation of our regional electric system in an environmentally sustainable manner."
~~ Jorge Carrasco, Superintendent, Seattle City Light