South Orange County Reliability Enhancement (SOCRE) Project
Our mission is to provide our 3.7 million customers with clean, safe and reliable energy. To do this, we continue to modernize and upgrade existing substations and infrastructure, so you get the reliable energy you deserve. The SOCRE project improves electric reliability in South Orange County. The SOCRE project was approved on December 15, 2016, by the California Public Utilities Commission (CPUC). Construction on this project began in 2017 and is expected to be completed in 2023.
About the Project
The SOCRE project will increase the reliability and operational flexibility of SDG&E’s South Orange County 138-kilovolt (kV) system and reduce the risk of power outages. Aging electric infrastructure in South Orange County is being upgraded, including the Capistrano Substation in the City of San Juan Capistrano and the existing transmission line network serving the area.
Power delivered by the Talega Substation, located on Marine Corps Base Camp Pendleton, is transmitted to seven distribution substations over a 138-kV transmission network; Capistrano, Laguna Niguel, Margarita, Pico, San Mateo, Rancho Mission Viejo and Trabuco. The SOCRE project will improve reliability by providing a second 230-kV power source to SDG&E’s South Orange County service area. The Capistrano Substation, constructed in 1918 and last rebuilt in 1940, will be modernized including the aging infrastructure between the Talega and Capistrano Substations.
SDG&E will send community members advance notifications and project updates through the US Postal Service, email, door-to-door outreach and the news media. Below you'll find the project schedule, reliability benefits, frequently asked questions, the project permitting process and project contact information. We too, live and work in the communities where construction is taking place. We respect your streets and neighborhoods and will take care when driving and working in the surrounding communities.
- Improves reliability to existing electric system
- Modernizes electric transmission system and replaces outdated equipment
- Replaces wood poles with steel poles to reduce fire risks
- Meets current and future energy needs of local homes and businesses
- Allows for operational flexibility
- Meets federal and state reliability standards
Reconstruction of the San Juan Capistrano Substation began in July 2017 and was the beginning of an approximately six-year construction schedule. Since early 2019, power lines surrounding the Capistrano Substation are being installed and configured. Also, some of the existing transmission structures between the Capistrano and Talega Substations are being replaced with upgraded, modern structures with increased capacity.
|2012 – 2017||Project permitting|
|2017 – 2022||Rebuild and upgrade the Capistrano Substation|
|2019 – 2023||Replace and upgrade a transmission line with phased completion|
|2020 – 2023||Replace existing structures with taller, new steel poles|
Frequently Asked Questions
The project is in San Juan Capistrano, San Clemente and the unincorporated areas of Orange County. The outdated substation in San Juan Capistrano is being rebuilt and upgraded. One of the transmission lines that connects the Capistrano and Talega substations is being upgraded to provide added reliability and operational flexibility.
The South Orange County Reliability Enhancement Project is necessary to maintain reliability in the South Orange County communities. By replacing outdated and aging infrastructure in the area, SDG&E will be able to maintain safe and reliable service to its South Orange County customers. In addition, the added capacity will accommodate future growth.
SDG&E developed the ‘preservation alternative’ to save and restore the former utility structure that was originally built in 1918. Keeping and restoring a portion of this structure was a major request from several local community stakeholders. The CPUC approved this alternative in their final decision dated December 15, 2016.
SDG&E is replacing the existing 138/12-kV substation that was last rebuilt in the 1940’s with a new 138/12-kV gas-insulated substation. Additionally, there will be a new 230/138-kV gas-insulated substation built within the substation site. Once the new 138/12-kV gas-insulated substation is in service in the lower yard, the existing 138/12-kV substation will be decommissioned and the 230/138-kV gas-insulated substation will be built in the upper yard. And the majority of the existing wood poles to the east and west of the site will be removed and the lines will be undergrounded.
Proponent’s Environmental Assessment (PEA)
Proponent’s Environmental Assessment (PEA), Volume II of II, PUBLIC Version
CPUC Regulatory Process
SDG&E filed an application with the CPUC for the SOCRE project in May 2012 and the CPUC application for SOCRE was filed May 18, 2012.
CPUC scoping process dates:
Public meetings were held January 23 - 24, 2013
Public Comment, January 9 - February 22, 2013
Draft EIR- comment period ended April 10, 2015
Additional Draft Environmental Impact Report (DEIR) comment period ended on September 24, 2015
Final Decision was made on December 15, 2016
CPUC website for SOCRE Project
Go to the CPUC site
Para informacion Español
Contact Us/More Information
CONSTRUCTION HOTLINE 1-833-201-5218
External Relations Manager
South Orange County Reliability Enhancement