Mare Island Causeway Bridge Preventative Maintenance Project

Project Description

The Mare Island Causeway Bridge, originally built in 1934, is a vehicle and pedestrian bridge that straddles the Napa River and serves as the connector between the Greater Vallejo area and Mare Island. In 2016, the City completed an upgrade project on the Bridge, replacing a 50-foot span of bridge timber with steel. The iconic Bridge requires additional maintenance repairs to extend the Bridge's serviceable life and improve pedestrian and driver safety. These repairs are expected to include:

  • Bridge deck and pile repairs
  • Sidewalk replacement and ADA improvements
  • Lighting and handrail repairs
  • Repainting the Bridge's steel lift span, towers, and historic logo
  • Deck methacrylate coating (Painting)
  • Concrete spall and crack repairs
  • Fender system repair for marine traffic safety
  • Replacement of underwater anodes

*See new 2025 construction schedule.

Project Location

Budget

$19.8M (Construction Cost) ($22.5M = Grant funding / $3.3M = Local Match)

Project construction Schedule

Mare Island Construction Status

August 4 – September 30, 2025

  • Weekdays (Monday–Friday): One-lane traffic from 7:00 AM to 5:00 PM, with traffic control provided by onsite flaggers.
  • Weekends: The bridge will remain fully open with one lane in each direction.

October 1 – December 31, 2025

  • The bridge will operate under a 24/7 reversible one-lane traffic configuration, controlled by automated timed signals.

Please note: This reversible one-lane setup is expected to continue into most of 2026 to support ongoing construction and safety monitoring.

Motorists are advised to plan ahead, follow posted signage, and drive safely through the work zones. The City encourages all residents to stay informed and help spread the word to minimize disruptions.

Project Documents

If you have questions contact Sam Kumar, Project Manager (707) 648-4432, Sam.Kumar@cityofvallejo.net.

Click here to visit the new project page and see the answers to your questions.

Check out and download the project fact sheet below.

MI Maintenance Project

MI Causeway Project Sheet.pdf

2025 MI Bridge Contruction Flyer

2025 Mare Island Bridge Construction Notice flyer.pdf

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