Egbert Switching Station Project (Martin Substation Extension)
We're extending an electrical path in San Francisco
The project is part of PG&E’s commitment to providing a safe, reliable and efficient grid for the 16 million Californians we serve. Infrastructure investments like this help us meet our customers’ evolving needs and build resiliency into the electric transmission system.
PG&E is building the Egbert Switching Station Project to increase the reliability of the electric transmission system that supplies power to San Francisco. It will also reduce the risk of widespread power outages in the City.
The project reroutes existing electric 230,000-volt (230kV) transmission lines around one of the Peninsula’s major energy hubs to a new switching station. The new facilities will provide an additional electrical path around the hub.
The project is comprised of two parts: (1) the Egbert Switching Station; and (2) the new transmission lines to be connected to existing transmission lines at and nearby PG&E’s Martin Substation.
Egbert Switching Station Site Construction
The new Egbert Switching Station will occupy approximately two acres and will be located at 1755 Egbert Avenue, where Egbert Avenue dead ends at the CalTrain tracks in San Francisco. Once constructed, much of the equipment will be contained within the new building.
Egbert Switching Station Construction Route
In addition to Egbert Switching Station, approximately 3.9 miles of new electric transmission lines will be added to bypass the current hub and provide an additional electrical path around the hub. The rerouted 230kV transmission lines are planned to go underground, mostly within city streets.
In March 2015, the California Independent System Operator (CAISO) Board of Governors approved the project and directed PG&E to identify locations for a new switching station and backup electric transmission lines. In late 2017, PG&E submitted an application to the California Public Utilities Commission* (CPUC) which identified our proposed switching station site on Egbert Avenue. This application included the proposed transmission line routes and alternative sites and routes. The CPUC then evaluated the site and route alternatives. They ultimately decided on the Egbert site as the environmentally superior project option following public meetings on the subject.
On June 25, 2020, the CPUC completed their CEQA review and granted PG&E a Certificate of Public Convenience and Necessity (CPCN) for the project. The CPUC also filed a CEQA Notice of Determination for the Project on June 30, 2020. The CPUC environmental review documents can be found at the CPUC website.
On October 21, 2021, the California Public Utilities Commission (CPUC) issued a Notice to Proceed, authorizing PG&E to move ahead with the Egbert Switching Station Project.
Download Notice of Application Cover Letter (PDF, 96 KB)
Download Notice of Application (PDF, 151 KB)
*The CPUC Board is Board is appointed by the Governor and confirmed by the State Senate.
SITE & ROUTE SELECTION
During the CEQA process, the CPUC evaluated several potential sites for the new switching station and associated transmission line routes within a two-mile radius of PG&E’s existing Martin Substation in Daly City. After their thorough evaluation, the best alternatives were ranked based on environmental and community considerations. The site on Egbert Avenue in San Francisco and associated transmission line routes had the highest land-use compatibility with the least amount of environmental impacts.
The CPUC ultimately decided on the Egbert site as the environmentally superior project. You can view it on the Overview map.
Download Overview Map (PDF, 3.5 MB)
Constructing this new path will increase the reliability of the electric transmission system that powers the homes and businesses in the City and County of San Francisco. In addition, the new hub and transmission lines will help reduce the risk of widespread power outages in San Francisco and help shore-up system resilience by providing an alternative power source to the area.
PROJECT TIMING & LOCATION
Construction of the new switching station and 230kV transmission lines began in January 2022. All work is expected to be completed by the end of 2024. During that time, neighbors can expect to see typical construction-type activities. Work will be completed in parts of Daly City, San Francisco’s Visitacion Valley and in a corner of Brisbane.
Frequently asked questions
What is the Egbert Switching Station Project?
This electric infrastructure project includes the construction of a new 230,000-volt (230kV) switching station and connections to existing underground transmission lines. The project will provide a system backup with the construction of a new electrical bypass around one of the key electrical hubs on the San Francisco Peninsula. It will improve resiliency and resolve concerns of a prolonged and widespread loss of service in San Francisco in case of an extreme event.
Why are a new switching station and connections to existing transmission lines needed in this area?
Electric customers in San Francisco now rely on power supplied through PG&E’s Martin Substation in Daly City and Transbay Cable Company’s transbay cable. Strengthening system resiliency and resolving reliability concerns helps meet the needs of the region’s growing population. It also supports continued economic vitality and bolsters the resilience of the electric infrastructure. The proposed project gives the local electric system greater flexibility and independence to adapt to a potential prolonged loss of service at PG&E’s Martin Substation.
Where will the project be located?
After evaluating several potential sites within a two-mile radius of PG&E’s existing Martin Substation, the site located at 1755 Egbert Avenue in San Francisco was chosen because it had the highest land-use compatibility. The California Public Utilities Commission (CPUC) determined the final project components and location following public meetings on the subject, shown on the overview map.
Download Overview Map (PDF, 3.5 MB)
When will the project be completed?
The project is expected to be completed and the switching station will be operational by late 2024.
What will PG&E do to ensure the safety and security of these facilities?
The security of our facilities is a top priority. We’re committed to using safety and security measures that meet the highest established standards for critical infrastructure protection. These include perimeter fencing and gates, lighting and intrusion detection systems for the new switching station.
How will PG&E minimize environmental impacts as a result of this project?
PG&E is dedicated to planning, constructing and operating the project with minimal impact to the environment and local community. When developing projects, we work with applicable local, state and federal agencies—as well as environmental organizations and communities—to ensure the project is planned in a manner that minimizes and avoids environmental impacts while complying with applicable standards and requirements.
What will the project look like?
PG&E plans to enclose the switching station equipment in a building or within walls. The associated transmission lines will be installed underground, so they will not be visible.
We have worked with a local architect to design a building that will enclose the major switching station components. The architect produced a design that contextually fits the existing neighborhood and what is envisioned for the future.
DOWNLOAD THE ARCHITECT’S DESIGN (PDF, 404KB)
PG&E is dedicated to planning, constructing and operating the project in a manner that minimizes visual and environmental impacts. We understand and respect customer concerns about any impact to the quality of life in the existing neighborhoods around potential projects.
How were potential switching station sites determined and underground transmission routes selected?
PG&E looked for sites in areas with existing commercial and industrial uses. Our goal was to utilize land that is vacant or under-developed. We identified sites:
- Where the equipment would fit;
- Where screening and setbacks of structures would be allowed; and
- That were located within a reasonable distance to existing transmission lines.
Other considerations include:
- Impacts to local communities
- Compatibility with established infrastructure and land uses
- Sensitive resource and habitat areas
- Length of new transmission line
- Constructability and engineering conflicts
How will PG&E address community concerns regarding electric and magnetic fields?
Electric and Magnetic Fields (EMF) are present anywhere an electric current is present and can be found in homes, offices and schools. PG&E recognizes customer concerns about EMFs from power lines and substations.
Protecting the health and safety of the local community is of the utmost importance to PG&E and the project team. We are committed to fully complying with the CPUC's EMF policies—the most comprehensive in the U.S. and supported by scientific research.
PG&E provides free magnetic field measurements upon request, EMF health literature and support for EMF research. For more information, please visit our EMF page.
What are the next steps?
What role will my local city play in this process?
While the CPUC determined the final project components and location, PG&E is working closely with city and county officials in San Francisco, Daly City, Brisbane, plus other public agencies, to ensure that local needs and priorities are carefully considered throughout the construction process.
We are actively informing residents and local businesses about project construction details in a timely and transparent manner via meetings, notification letters, door-to-door and other means.