Marin & Napoleon Rail Bridge Improvements

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 was fully replaced for safety and structural integrity purposes, whereas minor safety improvements were made to the Marin St. Bridge.


  • 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