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Southern California Edison (SCE), Tehachapi Renewable Transmission Project

STATUS: In progress, with opposition.

TYPE: Transmission Line

OPPOSITION: City of Chino Hills, CA

PROSPECTS: Likely. SCE says that when complete, the project will provide the high-voltage transmission infrastructure necessary to interconnect and deliver the renewable wind resources in the Tehachapi area to California's electricity customers, which is compatible with California's renewable energy goals.

BACKGROUND: Southern California Edison’s (SCE) Tehachapi Renewable Transmission Project (TRTP) is designed to move 4,500 MW from wind- and other renewable resource-generated electricity out of the Tehachapi Wind Resource Area in Southern California. Scheduled to be completed in 2015 at an estimated cost of $2.1 billion, the TRTP is divided into 11 segments. The project is subject to review under the California Environmental Quality Act (CEQA) and National Environment Policy ACT (NEPA).

In December 2004, SCE submitted an application to the California Public Utilities Commission (CPUC) for Segments 1-3.  In May 2010, SCE announced that it had completed this nearly 83-mile portion of the TRTP, which contains mostly 500-kV and some 220-kV sections that are capable of carrying 700 MW of power to consumers.  This part of the project was originally known as the Antelope Transmission Project.  Originating at the Antelope substation in Lancaster, CA, three lines branch to Santa Clarita, the Vincent substation and the Tehachapi area

In June 2007, SCE submitted an application to the CPUC for completing Segments 4 through 11.  SCE also submitted an application for a Special Use application with the U.S. Forest Service (USFS).  Segments 4 through 11 of the TRTP will include new and upgraded electric transmission lines and substations between eastern Kern County and the City of Ontario in San Bernadino County. Segments 4, 5, 6, 7, 8, 10, and 11 are transmission facilities, while Segment 9 involves the addition and upgrade of substation facilities.  The Final Environmental Impact Report (EIR) was released on October 30, 2009.  The CPUC approved SCE’s request to construct Segments 4-11 of the TRTP on December 17, 2010.  The USFS released a Supplemental Draft Environment Impact Statement (EIS) on April 30, 2010, which assessed the changed conditions created by a fire that burned approximately 251 square miles of land in the Angeles National Forest between August 26, 2009, and October 16, 2009; the public comment period ended on June 14, 2010.  On September 14, 2010, the USFS released the Final EIS for the TRTP. 

The City of Chino Hills, CA is protesting SCE's application and has urged an alternative route that would avoid residential areas of the City. The City has stated that the proposed route would negatively impact its residents and has raised concerns regarding aesthetics, geological hazards, and safety risks. 

LINKS: South California Edison: www.sce.com/NR/rdonlyres/D92D6387-CF9A-4B60-868C-35EF45CE35E3/0/Greening_The_Grid_FINAL_0311.pdf; http://www.edison.com/pressroom/pr.asp?id=7390; http://www.narucmeetings.org/Presentations/Les%20Starck%20NARUC%20Staff%20Sub%20Feb%2014%202010.pdf;
Chino Hills: www.chinohills.org/index.asp?nid=737;
California Public Utilities Commission: http://docs.cpuc.ca.gov/environ/tehachapi_renewables/TRTP.htmhttp://www.misostates.org/CARP8TehachapiPresentation.pdf;

Last Updated:  December 6, 2010