Southern California Edison

Triton Substation Project

(Application No. A.08-11-019)

Welcome to the California Public Utilities Commission (CPUC) website for the California Environmental Quality Act (CEQA) review of proposed construction of Southern California Edison (SCE) Triton Substation Project. An application for this project was submitted to the CPUC on November 21, 2008 (Application A.08-11-019). This site provides access to public documents and information relevant to the CEQA review process.

Background

SCE has filed an application with the CPUC to construct the Triton Substation Project. The CPUC is the CEQA lead agency.

The Triton Substation Project, as proposed by SCE, would be located in Temecula, in Riverside County, California. It includes construction of a new 56 megavolt ampere (MVA) 115/12 kilovolt (kV) unattended substation (Triton Substation) that would serve the cities of Temecula, Murrieta, and unincorporated southwestern Riverside County. The Triton Substation is proposed to be built on an approximately 10 acre parcel at the southeast corner of Nicolas Road and Calle Medusa. Click here for a map showing the locations of the proposed site and alternative sites that are being considered.

The proposed project would also include a 115 kV loop-in from the existing subtransmission line into the new substation, two new underground 12 kV distribution duct banks, and a telecommunications system. The subtransmission line loop-in would comprise two new 115 kV subtransmission line segments, each approximately 1,300 feet long, that would be constructed on new double circuit structures to connect the substation to the existing Valley-Auld-Pauba 115 kV subtransmission line.

The Electrical Needs Area is currently served by SCE’s Canine 33/12 kV Substation (Riverside County in Temecula), Moraga 115/12kV Substation (Riverside County in Temecula), and Auld 115/33/12 kV Substation (Riverside County in Murrieta), including an emergency 33/12kV transformer bank at Auld Substation. Canine Substation is a temporary facility that is scheduled to be retired by June 2010. Similarly, the emergency transformer bank at Auld Substation is scheduled to be removed in 2010 when Triton Substation is operational.

SCE currently forecasts that the demand in the Electrical Needs Area may exceed the designed operating limits of the existing distribution facilities as early as the summer of 2010. SCE has designed the project to meet the long-term forecasted electrical demands of the cities of Temecula, Murrieta, and adjacent areas of unincorporated southwestern Riverside County while maintaining system reliability and enhancing operational flexibility. SCE proposes to construct the project from approximately October 2009 to May 2010. The estimated cost of the proposed Triton Substation is approximately $29.9 million in 2008 constant dollars.

SCE’s April 2008 fact sheet and October 2008 project update have additional information about the project.

Application and Proponent’s Environmental Assessment (PEA)

The application and PEA for the Triton Substation Project are available to view.

The CPUC mailed a deficiency letter on December 22, 2008.

Other Documents Available

Deficiency Letter (December 22, 2008)

SCE fact sheet (April 2008)

SCE project update (October 2008)

For Additional Information

The CPUC, through its Environmental Review Team, is conducting an environmental review of the project. To request additional information or to be added to the mailing list, please contact us by email, fax, or phone, as follows:

Project email: triton@ene.com

Project fax: (415) 981-0801

Project voicemail (toll-free): (877) 651-3666

The CPUC’s Project Manager is:

Iain Fisher, CPUC Project Manager

California Public Utilities Commission

505 Van Ness Avenue

San Francisco, CA 94102

tel. (415) 355-5580

fax (415) 703-2200

email: AEI@cpuc.ca.gov

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