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San Diego Gas & Electric

Sycamore-Peñasquitos 230 Kilovolt Transmission Line Project

(Application No. A.14-04-011)

Last Update: May 28, 2014

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Welcome to the California Public Utilities Commission (CPUC) website for the California Environmental Quality Act (CEQA) review of San Diego Gas and Electric Company’s (SDG&E’s) proposed Sycamore-Peñasquitos 230 Kilovolt Transmission Line Project (Project). SDG&E submitted an application to the CPUC for a Certificate of Public Convenience and Necessity (CPCN) for this project on April 7, 2014. This site provides access to public documents and information relevant to the CEQA environmental review process.



Project Description

Proponent's Environmental Assessment (PEA)

Environmental Review

    Draft Environmental Impact Report

For Additional Information

Upcoming Public Meetings

Public Meeting

None scheduled at this time.


SDG&E is a regulated public utility that provides electric service to three million customers within a 4,100 square mile service area, covering parts of two counties and 25 cities in the San Diego area. In an effort to increase the efficiency and supply of renewable generated power to the California Independent System Operator (CAISO) grid, CAISO has identified a policy-driven need for a new 230 kV transmission line to connect the existing SDG&E Sycamore Canyon and Peñasquitos Substations. In response to the CAISO Request for Proposal (RFP) for this new 230 kV transmission line, SDG&E proposes to construct and operate a new, approximately 16.7-mile 230 kV transmission line (TL 230XX1) between the existing SDG&E Sycamore Canyon and Peñasquitos Substations. The Project would also include the consolidation of two existing 69 kV power lines onto new double-circuit, steel structures that would replace existing, predominantly wood structures. All new transmission line facilities would be located within existing SDG&E ROW or within franchise position within existing public roadways. 

Project Description

The Project would include the following primary components:
  • Segment A - Construction of approximately 8.31 miles of new 230 kV transmission line on new tubular steel poles all within existing SDG&E ROW located between the existing Sycamore Canyon Substation and Carmel Valley Road;
  • Segment B - Install new, approximately 2.84-mile 230 kV underground transmission line in Carmel Valley Road utilizing existing franchise position for almost the entire segment;
  • Segment C - Install new 230 kV conductor on the existing 230 kV steel structures and one new tubular steel pole all within existing SDG&E ROW located between Carmel Valley Road and Peñasquitos Junction;
  • Segment D - Install new 230 kV conductor on existing double-circuit 230 kV steel lattice towers all within existing SDG&E ROW located between the Peñasquitos Junction and the existing Peñasquitos Substation; and
  • Minor modifications of the existing Sycamore Canyon and Peñasquitos Substations to allow for connection of the new 230 kV transmission line.
A map of the Project showing Segments A-D can be viewed here: Project Overview Map

Proponent's Environmental Assessment (PEA)

SDG&E filed an application (A.14-04-011) for a CPCN and Proponent's Environmental Assessment for the Project on April 7, 2014. The PEA is a starting point for the independent environmental review process conducted by the CPUC.

The application can be viewed here:  Application (2.5 MB)

The PEA can be viewed here:  PEA (32.9 MB)   PEA Appendices (167.2 MB)

Environmental Review

Draft Environmental Impact Report

The CPUC has determined that an Environmental Impact Report (EIR) appears to be the appropriate CEQA document to prepare for the Project. The Draft EIR is currently under preparation.

For Additional Information

Additional information will be posted at this site as it becomes publically available.

The CPUC, through its Environmental Review Team, is conducting an environmental review of the project. To request additional information, ask a question, or be added to the project mailing list, please contact:

Voicemail or Fax

v:(650) 373 - 1200, f: (650) 373 - 1211

U.S. Mail or Courier

Billie Blanchard
California Public Utilities Commission
505 Van Ness Ave, 4th Floor
San Francisco CA , 94102

c/o Panorama Environmental, Inc.
1 Embarcadero Center, Suite 740
San Francisco, CA, 94111


Related Links:
CPUC Proceeding
A.14-04-011 - Proceeding

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