Southern California Edison's
Antelope Transmission Project, Segments 2 and 3

(Application No. A.04-12-008)

Welcome to the California Public Utilities Commission (CPUC) website for the environmental review of the proposed Segments 2 and 3 of the Antelope Transmission Project. This proposed Project (Segments 2 and 3 collectively) includes a series of 220-kilovolt (kV) and 500-kV transmission line upgrades between the Tehachapi Wind Resource Area in southern Kern County and Vincent Substation in Los Angeles County, as well as two new substation facilities in Kern County. Southern California Edison (SCE) submitted an application for a Certificate of Public Convenience and Necessity (CPCN) for Segments 2 and 3 to the CPUC on December 9, 2004. Segment 1 of the Antelope Transmission Project was addressed in a separate CPCN application (No. 04-12-007). The proposed Project is subject to review under the California Environmental Quality Act (CEQA). This site provides access to public documents and information relevant to the CEQA review process.

Final Environmental Impact Report

In accordance with CEQA, an Environmental Impact Report was prepared for the proposed Project. The Final Environmental Impact Report (Final EIR) was certified and a Certification of Public Convenience and Necessity (CPCN) was granted by CPUC (Docket #A.04-12-008, SCH #2006041160) on March 15, 2007.

The Final Environmental Impact Report (Final EIR) was issued on December 26, 2006. The Final EIR consists of two volumes. Volume I is a re-printed version of the Draft EIR. Changes made to the Draft EIR in Volume I are identified as follows: inserted text is underlined and deleted text is shown in strikeout. Volume II consists of all comments received on the Draft EIR and responses to those comments.

The CPUC released the Draft EIR for the proposed Project on August 23, 2006. The public comment period for this document ended on October 16, 2006. All comments received on the Draft EIR have been responded to in the Final EIR, Volume II, as discussed above.CEQA requires that the CPUC provide written responses to public agency comments at least 10 days prior to certifying an EIR (Public Resource Code 21092.5(a)). This was accomplished by sending the Final EIR to all agencies that commented.

Project Activities Subsequent to CPUC Approval

Compliance review for pre-construction mitigation measures identified in the Mitigation Monitoring Plan as presented in the Final EIR is currently being conducted by CPUC. This plan ensures that the approved project will be constructed as defined, and that all adopted mitigation measures and Applicant Proposed Measures will be implemented in order that effects on the environment do not exceed those described in the Final EIR. CPUC Notices to Proceed to Construct are being issued as compliance is satisfied by SCE. A CPUC Environmental Monitor is monitoring construction activities to ensure that they are conducted in accordance with the approved mitigation measures and permit conditions. Weekly Reports documenting this monitoring activity are available at: (

Construction photos are available for viewing at: TBP

Other Documents Available


SCE had filed an application with the CPUC to construct the proposed Project, which consists of new transmission line infrastructure between SCE's existing Vincent Substation in Los Angeles County, California, and the Tehachapi Wind Resource Area in southern Kern County, California. The proposed Project would help to accommodate anticipated new wind generation in the Tehachapi Wind Resource Area north of Antelope Substation. The 500-kV transmission lines would initially operate at 220 kV and would serve to reduce increasing loading on SCE's Antelope-Mesa 220-kV transmission line. Segments 2 and 3 of the Antelope Transmission Project are part of SCE's plans to interconnect and integrate potential wind energy projects to SCE's electrical system. Segment 2 has the potential added benefit of improving overall electric system reliability by increasing capacity between Antelope Substation and Vincent Substations.

Project Description

The main project components are described below. Substation Two and Substation One, in addition to the 9.6 miles of 220-kV transmission line facilities connecting them and the 25.6 miles of 500-kV transmission line facilities between Substation One and Antelope Substation, are collectively referred to as Segment 3 of the proposed Project. The 21.0 miles of 500-kV transmission line facilities and the 0.6 miles of 220-kV transmission line facilities between Antelope and Vincent Substations are referred to as Segment 2 of the proposed Project. SCE is proposing to construct the following new transmission system components as part of the proposed Project:

The proposed Project would not traverse any Federal lands. Segment 3 would be constructed in both Los Angeles and Kern Counties. The portion of Segment 3 between Antelope Substation and Substation One (Windhub Substation)would follow planned 105th, 107th, and 103rd Streets for the majority of its length, with part of the route also running parallel to the western border of the proposed Del Sur Ranch development in western Lancaster. The 9.6-mile portion of Segment 3 between Substation One(Windhub Substation) and Substation Two (Highwind Substation)would be constructed through a largely rural area of the Tehachapi Wind Resource Area in southern Kern County. Segment 2 would be constructed completely within Los Angeles County and would parallel existing SCE transmission line corridors for most of its length between SCE's existing Antelope and Vincent Substations.

The 500-kV transmission lines would initially be energized at 220-kV. The proposed Project includes electrical interconnections at the existing Antelope Substation (Segments 2 and 3) and the existing Vincent Substation (Segment 2).

The following link provides a general Project map: Map 1 - General Location (2.5MB)

Additional maps and figures for the proposed Project and alternatives are provided below, in link provided to the Final EIR.

For Additional Information

To request additional information or to be added to the mailing list, please contact us by e-mail, fax, or phone, as follows:

Project E-mail:
Project Fax and Voicemail: (661) 449-3069

The CPUC's Project Manager is:
Junaid Rahman, CPUC Project Manager
California Public Utilities Commission
505 Van Ness Avenue
San Francisco CA 94102
Tel. (415) 355-5492
Fax (415) 703-2200

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