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Cascade Renewable Transmission Project

Assigned Site Specialist
Maria Belkina

Assigned CFE

Applicant: Cascade Renewables LLC
Facility: 320-kilovolt [kV] or 400-kV high-voltage direct current (HVDC) 1,100-megawatt (MW) electric transmission facility
Counties: Clark, Skamania, Klickitat

Project Milestones

Looking for the Pre-Application Informational Meeting information? Please see the Application webpage.

Project Information

The proposed project is a (320-kilovolt [kV] or 400-kV) high-voltage direct current (HVDC) 1,100-megawatt (MW) electric transmission facility interconnecting the existing Bonneville Power Administration (BPA) Big Eddy 500-kV alternating current (AC) substation located- near The Dalles, Oregon (Eastern Interconnection), and the existing Portland General Electric (PGE) Harborton 230-kV AC substation located in Portland, Oregon (Western Interconnection). 

From the interconnections, the cables would be buried underground in Oregon to the edge of the Columbia River on each end, and in the bed of the Columbia River in Oregon and Washington. The visible structures (converter stations and short segment of overhead transmission) are proposed in Oregon. The terrestrial project component in Washington includes approximately 7.5 miles of underground buried cable to bypass the dam, locks, juvenile fish passage, and tribal fishing areas at the Bonneville Dam. The terrestrial component of the project in Washington is located in public right-of-way (ROW) along Washington State Route 14 (SR 14), Ash Lake Road, and Fort Cascades Drive.


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