Marin & Napoleon Rail Bridge Improvements

Marin & Napoleon Rail Bridge Map

Background and Summary
The Marin Street and Napoleon Avenue 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 August 2020 and is expected to last up to 12 months. 

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.

This work has not yet been scheduled. Outreach will occur well in advance of the work.

Phone: 1.800.660.4287