Muni Metro East Bus Yard and 1399 Marin Street Facility

The information below is no longer valid as of July 2023, but the SFMTA will retain this page as-is to provide a public record of the individual projects' development and goals. 

In the summer of 2023, a reevaluation of the Facilities Framework master plan resulted in a shift in strategy that affected the projects listed on this page. The reevaluation of Muni service, fleet and facilities requirements in light of lower Muni ridership post-pandemic, more efficient service scheduling and major budget and funding challenges facing the agency, will update the Facilities Framework master plan. Although these changes may affect specific projects, the overall goal of the Plan remains intact: The SFMTA is committed to meet ridership and service demand as we modernize facilities.

Project Introduction

In 2017, the San Francisco Municipal Transportation Agency (SFMTA) launched the Building Progress Program, a $1.2 billion multi-year effort, to repair, renovate, and modernize the SFMTA’s aging facilities to keep the City moving. (Potrero Yard, located at Bryant and Mariposa streets, is the first Building Progress Program capital rebuild project. Construction for Potrero Yard is expected to begin in 2024.)

Two SFMTA facilities in southeast San Francisco will soon play an important part in these upcoming rebuild projects. As a bus yard is taken offline for construction, operations will be relocated to a temporary bus yard at Muni Metro East (MME) and heavy maintenance functions will be relocated to 1399 Marin Street.

After rebuilding bus yards across the City, the SFMTA will consider using this yard to expand MME rail operations.

For more information, read the detailed report of our MME Environmental Review Determination.

Project Timeline
2020 to 2023
2023 to 2024
Current Phase or Stage
Predicted Completion
Ensure the continuation of bus operations and maintenance activities while bus facilities within the Building Progress Program are under construction.
Improve the efficiency and timeliness of bus maintenance and repairs.
Improve working conditions for all staff.

Project Locations

Muni Metro East (MME)

Located at 601 25th St, MME is a 16.9-acre site owned by the SFMTA and located in the Dogpatch neighborhood. The rail yard stores approximately 100 light rail vehicles and contains 14 maintenance bays. MME opened in 2008.

Aerial view of MME looking east with vacant lot visible in background

Muni Metro East, aerial view looking east

1399 Marin

Located at 1399 Marin St is a 3.2-acre maintenance yard located between the Dogpatch and Bayview neighborhoods. The facility is a Muni motor coach acceptance yard, rail track shop, and street car storage facility. 1399 Marin opened in 1998.

Bus on lift for inspection at 1399 Marin facility

1399 Marin, interior

Project Proposal 

As part of the Building Progress Program, operations and maintenance activities at Muni Metro East and 1399 Marin will expand to continue Muni operations and maintenance during the rebuild of other bus yards.

Bus Yard at MME

Four acres of vacant land adjacent to the current MME site will be used as a bus operations yard to support the following activities: 

  • Bus operations, operator check-in trailers, lockers, restrooms, and break space.
  • Bus washing served by below-grade rainwater cistern, fare pull, and interior bus cleaning.
  • Overhead trolley charging (in yard only) and parking for approximately 105 trolley buses.
  • Landscaped bioswale with native plants for storm water capture and to mitigate sea-level events.
  • 24-hour security, 10’ security fence, three pedestrian gates, and one rolling bus gate
  • Accessing the improved street on Maryland Street from Cesar Chavez.

Conceptual aerial rendering of Bus Yard next to Muni Metro East with downtown in the background

Conceptual digital rendering of Muni Metro East Bus Yard aerial view.


Conceptual digital rendering of Muni Metro East Bus Yard aerial view.

Conceptual digital rendering of Muni Metro East Bus Yard fare collections building.

1399 Marin Expansion

The 1399 Marin facility is a3.2-acre site located in the southern waterfront off Cesar Chavez and west of Third Street. It is leased by the SFMTA from the Port. It will be renovated to accommodate various bus maintenance needs for electric trolley buses and serve as the SFMTA’s bus acceptance facility. Highlights include:

  • Bus maintenance activities (e.g. new bus acceptance, overhead trolley charging, bus parking for 39 buses as they wait for repairs or acceptance into the fleet.
  • Yard capacity: 39 total vehicles; (13) 40’ and (26) 60’ trolley buses.
  • Staff amenities (e.g. staff lockers, restrooms, and break room).
  • New perimeter 10’ high security fence, two rolling busgates and two pedestrian gates, plus five overheadroll-up exit bus gates

Conceptual digital rendering of 1300 Marin Street
Conceptual digital rendering of 1399 Marin Street site. 

outdoor workbay canopy at 1399 Marin
Proposed 25-ft high outdoor workbay canopy at 1399 Marin Street


map showing locations of the MME and 1399 Marin Street facilities

Contact Information
Kerstin Magary, Facilities and Real Property Management Senior Manager
Bonnie Jean von Krogh, Building Progress Public Affairs Manager
John Angelico, Public Information Officer