Segments 2 and 3 of Tehachapi Renewable Transmission Project Approved by California Public Utilities Commission

March 23, 2007

On March 15, the California Public Utilities Commission (PUC) approved Southern California Edison's (SCE) application to build segments 2 and 3 of the Tehachapi Renewable Transmission Project. The 57 miles of new lines will transmit power from wind developments proposed for northern Los Angeles and eastern Kern counties.

In a press release, SCE said that when all phases are developed, the Tehachapi project will include a series of new and upgraded high-voltage transmission lines capable of delivering 4,500 megawatts (MW) of electricity from wind farms and other generating companies. That would be enough energy to power nearly 3 million homes.

SCE has proposed constructing the Tehachapi project in 11 segments to coincide with the development of the independently owned wind farms. Segment 1 was approved by the PUC on March 1 and is pending approval by the U.S. Forest Service. Segments 2 and 3 include five components: a new 21-mile, 500 kilovolt (kV) transmission line connecting SCE's existing Antelope and Vincent substations; two new substations to be named Windhub and Highwind, located near Mojave and Monolith; a new, 25.6-mile, 500 kV transmission line connecting SCE's existing Antelope Substation with the proposed Windhub Substation; and a new, 9.6-mile, 220 kV transmission line connecting Windhub Substation with Highwind Substation. The new lines are expected to be operational in early 2009. SCE will file an application next June to build the remaining segments.

The Tehachapi project is part of SCE's 5-year, $4.3-billion transmission expansion program. The PUC decision will assist the utility in meeting the California Renewable Portfolio Standard, which requires each utility to obtain 20 percent of its power from renewable energy sources by 2010.

For more information, see the March 15 SCE press release.

Source: March 23 article in SNL Energy Renewable Energy Week

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