Colusa-Sutter Transmission Line

The Colusa-Sutter Transmission Line (CoSu) is a planned 500-kV transmission line within Colusa and Sutter counties, CA. The project, which will be a new pathway for renewable energy flow, would interconnect the California-Oregon Transmission Project (COTP) transmission system, near either Arbuckle or Maxwell, California, to the Central Valley Project (CVP) transmission system near Yuba City, California. According to THUB calculations, the project has an estimated cost of $60m.

Project Sponsor Line Miles Voltage (kV) From State To State Year in Service
Western Area Power Administration 44 500 CA CA 2022
Estimated Costs ($M) Voltage Type Project Status Project Group Origin Point Destination Point
60 Planned Maxwell O'Banion
Interstate Build Start NERC ISO/RTO Country Project Partners
2020 WECC CAISO US Sacramento Municipal Utility District