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San Diego Gas & Electric

Sycamore-Peñasquitos 230-Kilovolt Transmission Line Project

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

Last Update: October 16, 2019

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 CPUC Approves Alternative 5
 

Welcome to the California Public Utilities Commission (CPUC) website for the environmental review of San Diego Gas and Electric’s (SDG&E’s) proposed Sycamore-Peñasquitos 230-Kilovolt Transmission Line Project (Proposed Project) located in San Diego County, California. SDG&E submitted an application to the CPUC for a Certificate of Public Convenience and Necessity (CPCN) for the project on April 7, 2014. This site provides access to public documents and information relevant to the California Environmental Quality Act (CEQA) process, including mitigation compliance during construction. An Environmental Impact Report (EIR) was prepared by the CPUC (the CEQA Lead Agency) that evaluated potential environmental impacts associated with this Project. The CPUC voted on October 13, 2016 to approve Alternative 5, which was the Environmentally Superior Alternative in the EIR (see Decision 16-10-005), and a Notice of Determination was submitted to the State Clearinghouse.

On January 23, 2019 SDG&E filed a request for Petition for Modification (PFM) of Decision 16-10-008 to address the need to re-tension and sag approximately 2 miles of an existing 230-kV transmission line, which was outside of the geographic scope of the approved project and Final EIR. In May 2019, the CPUC published an Addendum to the Final EIR to address SDG&E’s PFM. On July 11, 2019, the CPUC issued Decision 19-07-008 to adopt the Addendum to the Final EIR and grant SDG&E’s PFM.

On September 7, 2019, SDG&E submitted a Notice to Proceed (NTP) #5 request to the CPUC to begin construction activities associated with the PFM. SDG&E's NTP #5 request can be viewed here. The CPUC approved NTP #5 on October 14, 2019. The CPUC's approval of NTP #5 can be viewed here.

QUICK LINKS

Mitigation Monitoring, Compliance, and Reporting Program

Pre-Construction Plans and Other Mitigation Compliance Documents

Construction and Mitigation Monitoring

Notices to Proceed

Weekly Monitoring Reports

Minor Project Refinements

Nest Survey Reports, Nest Buffer Reduction Requests, and Approvals

Temporary Extra Work Space Requests

Post-Construction Monitoring Report

Commission Decision

Mira Mesa Community Planning Group Presentation

Environmental Review

Petition for Modification

Data Requests and Responses

Final Environmental Impact Report

Draft Environmental Impact Report

Background

Project Description

Frequently Asked Questions

Application and Proponent's Environmental Assessment (PEA)

Deficiencies, Data Requests, and Responses

For Additional Information


Project Schedule

Project Milestones
Milestones
Date
Application deemed complete by CPUC July 24, 2014
Publication of Notice of Preparation August 11, 2014
Publication of Draft EIR September 17, 2015
Public Comment Period on Draft EIR (45 Days) September 17, 2015 - November 2, 2015
Publication of Final EIR March 7, 2016
CPUC Decision October 13, 2016
Start of Construction January 4, 2017
End of Construction August 2018

Mitigation Monitoring, Compliance, and Reporting Program

A Mitigation Monitoring, Compliance, and Reporting Program (MMCRP) was prepared by the CPUC to ensure compliance with applicant proposed measures and mitigation measures approved in the Final EIR. The MMCRP provides guidelines and standardizes procedures for environmental compliance during project implementation. The procedures define the reporting relationships, the roles and responsibilities of the project's environmental compliance team members, compliance reporting procedures, and the communication protocol. The final MMCRP is available below.

MMCRP
Appendix A - Project Alignment, Segments, and Staging Area Maps
Appendix B - Pre-Construction Mitigation Measures Tracking Table
Appendix C - Construction Mitigation Measures Tracking Table
Appendix D - Post-Construction Mitigation Measures Tracking Table
Appendix E - Operation and Maintenance Mitigation Measures Tracking Table
Appendix F - Project Contacts List (Confidential)
Appendix G - Weekly Compliance Checklist Form
Appendix H - Minor Project Refinement Form
Appendix I - Temporary Extra Work Space Request Form

Pre-Construction Plans and Other Mitigation Compliance Documents

Required pre-construction plans, permits, and mitigation compliance documents that have been reviewed and approved by the CPUC can be viewed here.

Construction and Mitigation Monitoring

Notices to Proceed

Construction of the Sycamore-Peñasquitos 230-kV Transmission Line Project began in January 2017 with the establishment of some construction yards, pending approvals and Notices to Proceed (NTPs) issued by the CPUC, the U.S. Fish and Wildlife Service, the California Department of Fish and Wildlife, the California Coastal Commission, the Cities of San Diego and Poway, and MCAS Miramar depending on jurisdiction, area, and type of work. NTPs that have been issued to SDG&E by the CPUC are noted below.


NTP # Description
NTP 1 Mobilize and begin operation of staging yards
NTP 2 Construct the underground portion from Sycamore Substation to Structure P03 and from Structure P05 to Structure CC MM CP
NTP 3 Mobilize and begin overhead transmission line and substation construction
NTP 4 Conduct one geotechnical boring within the Option 2 temporary workspace footprint
NTP 5
Re-tension and sag approximately 2 miles of an existing 230-kV transmission line

Weekly Monitoring Reports

CPUC Environmental Monitors monitor construction activities to ensure that they were conducted in accordance with approved mitigation measures and permit conditions. Weekly reports documenting construction activities and compliance can be viewed here.

Minor Project Refinements

The CPUC reviews SDG&E’s Minor Project Refinements (MPRs) according to the process outlined in the MMCRP. SDG&E's MPR proposals and the CPUC’s review are provided in the table below.

MPR # Description
MPR 1 Modify the approved project by transitioning the new 230-kV line and existing 138-kV line to an underground position
MPR 2 Modify the approved project by rerouting the new 230-kV underground line to avoid two parallel storm drains, reducing the originally approved alignment by 300 feet
MPR 3 Provide temporary power to the SDG&E trailer at the Stonebridge Staging Yard through the existing power box
MPR 4
Relocate the approved 2.61-acre Vulcan Mine Yard approximately 884 feet west to a 1.71-acre paved area
MPR 5 Establish staging yards along the southern perimeter of Pomerado Road and temporary work spaces north of P05 and P06
MPR 6
Establish staging yards along the southern and northern perimeters of
Pomerado Road
MPR 7 Establish a staging yard at the intersection of Pomerado Road and Avenue of Nations (previously approved in TEWS #1) and extend the temporary work space surrounding structure E40
MPR 8 Proposes temporary work areas to access 16 existing poles and 14 guard structure over a 2-mile existing transmission alignment
Data Request #1 / Data Request #2
MPR 9 Add 1.12 acres of paved, developed area to use as a staging area for vehicles and construction equipment; grade 0.01 acres; and install temporary fence along the perimeter of the proposed area
MPR 10 Authorizes a newly identified underground route option for the crossing of Interstate (I)-15, using a tunnel bore machine (TBM) to install the 230 kilovolt (kV) line under I-15
MPR 11 Adds approximately 0.13 acres of temporary work space to accommodate the installation of the 138kV and 230kV trench packages north of Sycamore Canyon Substation
MPR 12 Authorizes an approximately 0.96 acre of additional temporary workspace located along Kearny Mesa Road and west of Interstate 15 
MPR 13 Authorizes SDG&E to install five guy wire anchors within an existing dirt access road between structures P05 and P06
MPR 14 Authorizes an approximately 0.44 acre of additional temporary workspace located just northwest of structure CC MM CP
MPR 15 Authorizes the installation of stormwater management features by the CC MM CP structure.
MPR 16 Authorizes the repair and widening of the access road to Sycamore Canyon Substation.

Nest Survey Reports, Nest Buffer Reduction Requests, and Approvals

SDG&E conducts nesting bird surveys and implements protective measures to avoid and mitigate project-related impacts to nesting birds during the avian nesting season as specified in the MMCRP. The specified buffers from nesting birds may be reduced on a case-by-case basis in accordance with Mitigation Measure Biology-7 if, based on compelling biological or ecological reasoning, a CPUC-, USFWS-, and CDFW-approved qualified biologist determines that implementation of a specified smaller buffer distance will still avoid nest abandonment and failure. The CPUC’s independent biologist reviews SDG&E's requests to reduce standard buffers or for temporary buffer incursions. The nest survey reports, nest buffer reduction requests (NBRRs), and approvals can be viewed here.

Temporary Extra Work Space Requests

The CPUC reviews SDG&E’s Temporary Extra Work Space (TEWS) requests according to the MMCRP. SDG&E's TEWS requests and approvals are provided in the table below.

TEWS # Description
TEWS 1 The proposed 0.02-acre TEWS was identified and approved by the City of San Diego Resident Engineer as an alternate staging area for overnight staging of heavy equipment.
TEWS 2
The proposed 72-square-foot TEWS is within County of San Diego's public right-of-way and will be used for vault shoring.
TEWS 3
Relocate the proposed GS 06 location from a landscaped slope to a commercial parking lot.
TEWS 4 The approximately 4,800-square-foot TEWS is located at 6925 Lusk Boulevard in the City of San Diego, and will be used as a helicopter landing zone.
TEWS 5 The approximately 1,801-square-foot TEWS is located on the north side of Stonebridge Parkway within the City of San Diego., and will be used as a temporary staging area for a large crane. 

Post-Construction Monitoring Report

CPUC prepared a Post-Construction Monitoring Report to document the compliance process during construction of the Project. This report includes a description of the unique circumstances and lessons learned from construction of an underground 230-kV transmission line within an urban area.

The Post-Construction Monitoring Report can be viewed here.

Commission Decision

The CPUC Commission granted SDG&E a CPCN to construct Alternative 5 (Pomerado Road to Miramar Area North Combination Underground/ Overhead), the environmentally superior alternative, on October 13, 2016.

The Commission decision (D. 16-10-005) can be viewed here.

Mira Mesa Community Planning Group Presentation

At the request of the Mira Mesa Community Planning Group, the CPUC’s environmental consultant attended their September 19, 2016 meeting to summarize the CPUC environmental review and notification processes for the Sycamore-Peñasquitos Project, describe the components of Alternative 5 (the Environmentally Superior Alternative in the EIR) and Mitigation Measures to reduce significant impacts, outline the remaining schedule for project approval and construction, and discuss community concerns about construction of the Alternative 5 alignment in the Mira Mesa community.

The presentation from the meeting is available here.

Environmental Review

Petition for Modification

SDG&E filed a request for Petition for Modification pursuant to Rule 16.4 of CPUC’s Rules of Practice and Procedure on January 23, 2019. SDG&E requested to modify CPUC Decision 16-10-005 to re-tension and sag approximately 2 miles of the existing 230-kV transmission line. The area included in the Petition for Modification is located south of Carroll Canyon Road and east of Interstate 805 in western San Diego County and partially within Marine Corps Air Station Miramar. The Petition for Modification can be viewed here.

The Environmental Assessment (Attachment D) for SDG&E's Petition for Modiciation was revised in February 2019.
The revised Environmental Assessment can be viewed here.

The CPUC prepared an Addendum to the Final EIR for SDG&E's Petition for Modification. The Addendum can be viewed here.

On July 11, 2019, the CPUC issued Decision 19-07-008 to adopt the Addendum to the Final EIR and grant SDG&E’s Petition for Modification. The CPUC's decision can be viewed here.

Data Requests and Responses

The CPUC Environmental Review Team submitted data requests to the applicant for specific information to support the Petition for Modification process. These requests and the applicant's responses are available below.

 
CPUC Data Request
    
SDG&E Response
 
Attachments
Data Request 1
(Submitted January 29, 2019)
Response (February 6, 2019)

Final Environmental Impact Report

Final EIR: The Final EIR was published on March 7, 2016. Comments that were submitted on the Draft EIR are presented in Volume I of this Final EIR, along with responses to all comments. The CPUC is expected to make a decision on the project in 2016.

Addendum: An Addendum to the Final EIR was published on May 2016.

Draft Environmental Impact Report

Draft EIR: The Draft EIR was published on September 17, 2015. The comment period closed on November 2, 2015. Comments submitted on the Draft EIR are available here.

Informational Workshops

Three informational workshops on the Draft EIR were held in September 2015.  The informational workshops were intended to help affected communities understand the Proposed Project, alternatives, and the Draft EIR, and to explain how the public can participate in the CPUC decision-making process. The informational workshops included a brief presentation that summarized the EIR process, the Proposed Project and alternatives evaluated, the conclusions of the Draft EIR, and the decision-making process. The presentation slides and all meeting materials are available on this website below.


Notice of Preparation 
Issuance of a CEQA Notice of Preparation (NOP) is the first step in the EIR process. This document provides a description of the proposed Project and potential alternatives, as well as a schedule of the CPUC's proposed scoping process that will include public scoping meetings and agency consultations. The NOP was published on August 11, 2014. Click here to view the NOP.

Scoping Period and Meetings
The scoping period began on August 18, 2014 and ended on September 16, 2014. In order for the public and regulatory agencies to have an opportunity to ask questions on the scope of the EIR, the CPUC held three scoping meetings in the project area on August 25 and 26, 2014.

Public Scoping Report
The CPUC prepared a Public Scoping Report that documents the scoping activities and oral comments from the scoping meetings, as well as the written comments submitted in response to the NOP. This report serves as an information source to the CPUC in the determination of the range of issues and alternatives to be addressed in the Draft EIR. Click here to view the Scoping Report and Appendices.

Background

SDG&E stated that the Proposed Project objective is to meet the California Independent System Operator (CAISO) 2012–2013 Transmission Plan Functional Specifications for a new 230-kV transmission line between the Sycamore Canyon and Peñasquitos Substations by:

  1. Ensuring the SDG&E bulk electric system continues to meet North American Electric Reliability Corporation, Western Electricity Coordinating Council, and CAISO reliability criteria
  2. Promoting compliance with State of California policy goals related to renewable integration and Once-Through Cooling retirement
  3. Economically and reliably meeting the San Diego metropolitan area’s forecasted load growth 
  4. Delivering energy more efficiently to the load center in San Diego
SDG&E also stated that an objective of the Proposed Project  is locating the Proposed Project’s facilities in existing transmission and power line corridors, SDG&E ROW, SDG&E-owned property, and San Diego franchise rights-of-way. SDG&E’s objectives will focus the formulation of alternatives to the Proposed Project in the EIR. CEQA does not, however, require that alternatives meet each and every objective; the stated objectives therefore do not absolutely constrain development of alternatives to the Proposed Project.

Project Description

SDG&E's Proposed Project would be located within the Cities of San Diego and Poway. A portion of the Proposed Project would be located on the Marine Corps Air Station (MCAS) Miramar east of Interstate 15 (I-15). The Sycamore-Peñasquitos corridor traverses residential, open space, military (MCAS Miramar), vacant land, urban, commercial/shopping, industrial/energy facility, park, transportation, and light industrial/business park uses.

The Proposed Project includes construction and operation of a new 230-kV transmission line between the existing Sycamore Canyon and Peñasquitos Substations. The Proposed Project includes four transmission line segments and minor modifications to four existing substations:

Segment A: Sycamore Canyon Substation to Carmel Valley Road. SDG&E would construct an approximately 8.31-mile long 230-kV transmission line on 36 new double-circuit 230-kV and two 138-kV tubular steel poles (120-foot and 75-foot average height, respectively) from the Sycamore Canyon Substation to Carmel Valley Road. Two existing transmission lines (TL 13820 and TL 13825, which both terminate at Chicarita Substation) would be relocated to the new tubular steel poles, and approximately 42 wood H-frame structures, two tubular steel poles, one double-circuit cable pole, and two single-circuit wood mono poles associated with the two existing transmission lines would be removed. A portion of TL 13820 would be undergrounded as it enters the Sycamore Canyon Substation. Existing transmission line TL 23041 would be relocated to two new 230-kV structures within and immediately adjacent to the Sycamore Canyon Substation to make room for the new 230-kV connection at the substation.

Segment B: Underground Carmel Valley Road. SDG&E would construct an approximately 2.84-mile long 230-kV underground transmission line in Carmel Valley Road. Two cable pole structures (160-foot average height) for underground/overhead transmission conversion would be placed at the ends of the undergrounded segment. One double-circuit steel lattice tower would be removed at the western reach of the segment. Also, one 138-kV single circuit wood H-frame structure would be removed.

Segment C: Carmel Valley Road to Peñasquitos Junction. SDG&E would install approximately 2.19 miles of 230-kV conductor on existing steel lattice structures and one new tubular steel pole between Carmel Valley Road and Peñasquitos Junction. One steel lattice tower would be removed at the Peñasquitos Junction. Two existing transmission lines (TL 23001 and TL 23004) would be reconductored and bundled on the existing structures and re-designated as TL 23004. Existing shield wire on top of existing 230-kV steel lattice towers would be replaced with new optical ground wire.

Segment D: Peñasquitos Junction to Peñasquitos Substation. SDG&E would install approximately 3.34 miles of 230-kV conductor on existing double-circuit lattice towers and a tubular steel pole between the Peñasquitos Junction and the Peñasquitos Substation. SDG&E would also consolidate two existing 69-kV power lines (TL 675 and TL 6906) onto 17 new 69-kV tubular steel poles (95-foot average height) that would replace 16 existing 69 kV wood H-frame structures and five wood monopoles. Two tubular steel poles would replace two existing wood cable poles outside the Peñasquitos Substation. Existing shield wire on top of existing 230-kV steel lattice towers would be replaced with new optical ground wire.

Sycamore Canyon Substation. SDG&E would modify Sycamore Canyon Substation to facilitate the new 230-kV transmission line connection. Modifications would include transferring five existing transmission lines from existing bay positions to new bay positions, and adding a new circuit breaker.

Peñasquitos Substation. SDG&E would modify Peñasquitos Substation to facilitate the new 230-kV transmission line connection. Modifications would include adding two circuit breakers and four disconnects.

San Luis Rey and Mission Substations. Minor alterations may be made to these substations, including adjusting relays and upgrading protection on remaining lines.

Temporary Staging Yards. The Proposed Project would utilize approximately 25 acres of temporary construction staging yards for vehicles equipment refueling, pole assemblage, open storage of material and equipment, construction trailers, portable restrooms, parking, lighting, possibly generator use for temporary power in construction trailers, and incidental landing areas for helicopters. Four staging yards have been identified by SDG&E at this time, including the Stonebridge Parkway, Stowe, Torrey Santa Fe, and Carmel Valley Road Staging Yards. Refer to Figures 2 through 4 for staging yard locations. A potential fifth staging yard at Carmel Mountain Road has been dropped from the Proposed Project due to site development. Additional staging yards may be proposed by SDG&E.

Access Roads. Construction would primarily take place within the existing SDG&E ROW easements and access roads and public roadways. Most work areas would be accessible by vehicle on unpaved SDG&E-maintained access roads or by overland travel. Access roads would be used for vehicle parking and turn-around, and specific construction site staging.

A map of the Proposed Project showing Segments A-D can be viewed here: Project Overview Map

Frequently Asked Questions

Members of the public requested that the CPUC provide answers to questions asked at the public scoping meetings. The CPUC has prepared responses to several Frequently Asked Questions (FAQs) to address this request. FAQs can be found here.

Application and 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 was deemed complete on July 24, 2014. 

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)

Deficiencies, Data Requests, and Responses

The CPUC Environmental Review Team submitted data requests to the applicant for specific information to support the environmental review process. Those requests and the applicant's responses are published below.

CPUC Report/Request
SDG&E Response
Attachments
Deficiency Report
(Submitted May 7, 2014)
Response 1 (June 18, 2014)
Response 2 (Part 1) (July 7, 2014)
Response 2 (Part 2) (July 16, 2014)
Data Request 1
(Submitted August 6, 2014)
Response (Part 1) (August 18, 2014)
Response (Part 2) (September 9, 2014)
Response (Part 3) (September 16, 2014)
Response (Part 4) (October 8, 2014)
Update to Q67       (October 17, 2014) 
Data Request 2
(Submitted October 6, 2014)
Response (Part 1) (October 24, 2014)
Response (Part 2) (October 31, 2014)
Response (Part 3) (November 3, 2014)
Data Request 3
(Submitted November 17, 2014)
Response (Part 1) (November 25, 2014)
Response (Part 2) (December 5, 2014)
Response (Part 3) (December 12, 2014)
Response (Part 4) (December 16, 2014)
Response (Part 5) (January 29, 2015)
Response (Part 6) (February 13, 2015)
Data Request 4
(Submitted November 21, 2014)
Response (December 19, 2014)
Data Request 5
(Submitted January 9, 2015)
Response (Part 1) (January 23, 2015)
Response (Part 2) (January 30, 2015)
Response (Part 3) (February 3, 2015)
Supplemental Response (March 12, 2015)
Data Request 6
(Submitted January 22, 2015)
Response (January 29, 2015)
Response (Part 1) (February 25, 2015)
Response (Part 2--GIS Files) (February 25, 2015)
Supplemental Response (March 12, 2015)
Data Request 8
(Submitted March 4, 2015)
Response (Part 1) (March 25, 2015)
Response (Part 2) (March 27, 2015)
Data Request 9
(Submitted March 17, 2015)
Response (Part 1) (March 30, 2015)
Response (Part 2) (April 24, 2015)
Response (Part 3) (April 30, 2015)
Data Request 10
(Submitted April 8, 2015)
Response (Part 1) (April 21, 2015)
Response (Part 2) (April 24, 2015)
Response (Part 3) (September 29, 2015)
Data Request 11
(Submitted April 14, 2015)
Response (Part 1) (April 14, 2015)
Response (Part 2) (April 27, 2015)
Response (Part 3) (June 2, 2015)
Data Request 12
(Submitted April 30, 2015)
Response (Part 1) (May 5, 2015)
Response (Part 2) (May 14, 2015)
Data Request 13
(Submitted May 12, 2015)
Response (May 19, 2015)
Data Request 14
(Submitted June 9, 2015)
Response (Part 1) (June 11, 2015)
Response (Part 2) (June 23, 2015)
Data Request 15
(Submitted June 26, 2015)
Response (Part 1) (July 6, 2015)
Response (July 17, 2015)
Response (Part 1) (July 29, 2015)
Response (Part 2) (July 31, 2015)
Response (Part 3) (August 3, 2015) Follow-up Response (August 11, 2015)
Data Request 18
(Submitted November 25, 2015)
Response (December 10, 2015)
Data Request 19
(Submitted December 22, 2015)
Response (Part 1) (January 4, 2016)
Data Request 20
(Submitted January 8, 2016)
Response (Part 1) (January 25, 2016)
Response (Part 2) (February 12, 2016)
Data Request 21
(Submitted January 13, 2016)
Response (January 22, 2016)
No Attachments
Data Request 22
(Submitted January 28, 2016)
Response (Part 1) (February 5, 2016)
Response (Part 2) - Attachments Only (February 11, 2016)
Data Request 23
(Submitted April 1, 2016)
Response (April 18, 2016)


The CPUC Environmental Review Team submitted data requests to California Independent System Operator (California ISO) for specific information to support the environmental review process. Those requests and the applicant's responses are published below.

CPUC Report/Request
California ISO Response
Attachments
Data Request 1
(Submitted May 15, 2015)

Response 1 (May 27, 2015)

No Attachments



 
     CPUC Report/Request
    
      SDG&E Response
 
    Attachments
     
        Data Request 1
       (Submitted January 29, 2019)
    
        Response (February 6, 2019)

      Response Attachments

For Additional Information

Additional information will be posted on this site as it becomes publicly available. Project-related questions may be directed to the CPUC via one of the contact methods below.

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.
717 Market Street, Suite 650
San Francisco, CA 94103

Email

sycamorepenasquitos@panoramaenv.com


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


For additional information on the proceeding, contact the Public Advisor's Office

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