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Welcome to the California Public Utilities Commission (CPUC) website for the California Environmental Quality Act (CEQA) review of Southern California Edison's (SCE's) 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 and Current Status

Southern California Edison (SCE) filed an application with the CPUC to construct the Triton Substation Project for 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 has been approved to be built on an approximately 10-acre parcel at the southeast corner of Nicolas Road and Calle Medusa in Temecula, California. Click here for a map showing the location of the site.

The project will include construction of a 115 kV loop-in from the existing Valley-Auld-Pauba 115 kV subtransmission line into the new substation, two new underground 12 kV distribution duct banks, and a telecommunications system to connect the Triton Substation to the existing Auld and Moraga substations. SCE's existing Canine 33/12 kV Substation in Temecula would be retired when the Triton Substation is operational. SCE has designed the Triton Substation to eventually expand to 112 MVA at a future date, depending on need.

SCE currently forecasts that the demand in the service 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. The estimated cost of the Triton Substation is approximately $29.9 million in 2008 constant dollars.

The CPUC circulated the Final Draft Mitigated Negative Declaration and supporting Initial Study (Final MND/IS) on March 10, 2010 (see below). SCE’s application (A.08-11-019) was approved on September 23, 2010 (Decision 10-09-025). Notice to Proceed with minor telecommunications upgrades at existing substations was granted by the CPUC on July 14, 2011.

Application and Proponent's Environmental Assessment (PEA)

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

The CPUC sent SCE a deficiency letter on December 22, 2008. The CPUC found the application and the additional information that SCE submitted in response to satisfy the Commission’s Information and Criteria List and determined it to be complete on April 30, 2009.

Preparation of the Draft MND/IS

As the lead CEQA agency, the CPUC circulated a Draft MND/IS (15 MB) on November 18, 2009. The Draft MND/IS describes the project, evaluates potential environmental impacts, identifies impacts that could be significant, and presents mitigation measures that would avoid or reduce potential impacts to less than significant levels.

Public Comment Period and Preparation of the Final MND/IS

Circulation of the Draft MND/IS opened a public comment period on the Triton Substation project that extended from November 18, 2009, through December 17, 2009. During the public comment period, the CPUC hosted a public meeting on Monday, December 7, 2009, at 7:00 p.m. at the Calvary Baptist Church of Temecula, where the CPUC invited interested parties to present comments about the project and Draft MND/IS.

During the comment period, in addition to the oral comments made at the public meeting, the CPUC received comments via mail, email, and voicemail. Following the public comment period, the CPUC prepared a Final MND/IS that addresses comments received on the Draft MND/IS. The CPUC circulated the Final MND/IS, which is available by clicking the links below, on March 10, 2010. There is no comment period for the Final MND.

Availability of the Final MND/IS

Click on the links below to download each chapter of the Final Mitigated Negative Declaration/Initial Study:

Copies of the Final MND/IS will also be available for review at the Temecula Public Library and on the project website.

Temecula Public Library
30600 Pauba Road
Temecula, CA 92592-6206
(951) 693-8900

Mitigation, Monitoring, Reporting, and Compliance Plan

The CPUC implements a Mitigation, Monitoring, Reporting, and Compliance Plan (Chapter 5 of the Final MND/IS) prior to, after, and throughout construction. The Plan is used to ensure that the project is constructed as approved and that all adopted mitigation measures and project design features the applicant committed to are implemented to ensure that effects on the environment do not exceed those described in the MND/IS.

Other Documents Available

For Additional Information

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:

Eric Chiang, CPUC Project Manager
California Public Utilities Commission
505 Van Ness Avenue
San Francisco, CA 94102
Email: eric.chiang@cpuc.ca.gov
Tel.: (415) 703-1956
Fax: (415) 703-2200