Marin & Napoleon Rail Bridge Improvements

Marin & Napoleon Rail Bridge Map

Background and Summary
The Marin Street and Napoleon Street bridges are located near the base of Islais Creek, under the I-280 freeway, in San Francisco’s Bayview neighborhood. The Napoleon St. Bridge will need to be fully replaced for safety and structural integrity purposes, whereas minor safety improvements will be made to the Marin St. Bridge. Additional track work may occur from Cesar Chavez to Jerrold Street.

Project Scope:
  • Napoleon Street Bridge - Improve safety and security, minimize future maintenance repairs, and replace deficient bridge components by replacing the 4 short bridge spans with a center steel bridge. The new bridge will feature steel girders and new wing walls.
  • Marin Street Bridge - Improve safety and security, maintain the bridge at a state of good repair, and improve worker safety.
  • Potential additional track work to replace the rail from Cesar Chavez to Jerrold

Work on the bridges could begin as soon as October 2020 and is expected to last up to 14 months. 

A virtual public meeting will be held on September 30, 2020 at 5:30 p.m. Community members and residents will be able to learn about the project and have an opportunity to ask questions and provide feedback to the project team. More details are available on the event page

Community Impacts During Construction
While a majority of the work will be completed during the day, in order to maintain rail operations, night and weekend work will be required for some construction activities. Local businesses and neighbors will be notified before the start of any work. 

Access to businesses along Marin and Napoleon Streets will remain open during a majority of the construction. Pedestrian and vehicular traffic will not be impacted for the majority of this work.

The project may require temporary service disruptions while crews replace the Napoleon Street Bridge. Trains will terminate at Bayshore Station. Caltrain will NOT operate service to 22nd Street or San Francisco stations during the work. This work may involve road closures of Napoleon and/or Marin streets.

During this time, free SamTrans bus service will replace train service between Bayshore and San Francisco stations. Buses are ADA accessible and will have limited capacity for luggage and bikes onboard.

A contract was awarded on the July 9, 2020 Board meeting. Construction work will begin as soon as October 2020. 

Project Resources

Phone: 1.800.660.4287