Mare Island Causeway Bridge Update

City of Vallejo Public Works crews' repairs on Saturday, October 17, for the existing drawbridge imbalance were not successful. During the effort, crews identified an additional mechanical issue. A large metal coupling that helps raise and lower the bridge was found to be broken. Because of this, it is not safe to operate the bridge for marine traffic. The City has notified the Coast Guard, and the bridge will remain unable to open until the coupling is replaced. Vehicle traffic will not be affected.

The coupling is a specialized part and not available off the shelf. The Public Works Department is working to locate a replacement. If one cannot be found, the part will need to be custom fabricated, and we do not yet have a timeline. Once the new coupling is obtained and installed, Public Works will schedule another closure to complete repairs related to the original imbalance.

The City will provide additional updates as soon as more information becomes available.

The temporary closure of the Mare Island Causeway Bridge to pedestrians and bicyclists also remains in place through October 23, 2026, to allow crews to perform essential bridge‑deck maintenance.

Traffic will be moved back to the left (south) side again on either Saturday, October 24, 2026, or Monday, October 26, 2026, if this week’s work is delayed due to rain.

The bridge will reopen to pedestrian and bicyclist traffic on Friday, Oct 23 at approximately 5:15 PM

During weekday work hours (7 AM to 5 PM), crews will apply polyester concrete and methacrylate—high‑performance materials that strengthen and extend the life of the bridge. These products contain chemicals classified as carcinogenic and may produce strong odors that could cause headaches, nausea, or irritation. For the safety of all pedestrians and bicyclists, the bridge and the trails beneath it will remain fully closed while this work is underway.

Alternative routes for pedestrians and bicyclists include:

• The San Francisco Bay Ferry (Mare Island to Vallejo terminal); their schedule is available at https://www.sfbayferry.com/routes-schedules/vallejo/
• The Highway 37 Napa River Bridge, approximately a 2.6‑mile detour
• People with disabilities are encouraged to visit our City's ADA web page, email ada@cityofvallejo.net, or contact the Public Works Department’s general line (707) 648-5235 for assistance.

The City of Vallejo appreciates the community’s understanding and cooperation as we complete this critical infrastructure project. These improvements will help ensure the long‑term safety and reliability of one of our city’s key transportation links.

The Mare Island Bridge will be closed to ALL traffic—pedestrians, bicyclists, vehicles, and marine—on Saturday, October 17, 2026, from 9 AM to 3:45 PM to address an urgent corrective maintenance issue. The east side of the span has developed a mechanical imbalance causing a vertical misalignment (span skew). Due to the nature of these repairs, a full closure is required. Vehicular traffic entering Mare Island will be rerouted to the Highway 37 Napa River Bridge during this closure.

The temporary closure of the Mare Island Causeway Bridge to pedestrians and bicyclists also remains in place through October 23, 2026, to allow crews to perform essential bridge‑deck maintenance.

The pedestrian and bicyclist closure will take place only on weekdays.

• Reopens each Friday at approximately 5:15 PM
• Closes again each Monday at approximately 7:00 AM
• Open every Saturday (except for Oct 17 as noted above) and Sunday

During weekday work hours (7 AM to 5 PM), crews will apply polyester concrete and methacrylate—high‑performance materials that strengthen and extend the life of the bridge. These products contain chemicals classified as carcinogenic and may produce strong odors that could cause headaches, nausea, or irritation. For the safety of all pedestrians and bicyclists, the bridge and the trails beneath it will remain fully closed while this work is underway.

The City also advises open‑deck boats to avoid passing under the bridge between 7 AM and 5 PM, Monday through Friday, for the duration of the project.

Alternative routes for pedestrians and bicyclists include:

• The San Francisco Bay Ferry (Mare Island to Vallejo terminal); their schedule is available at https://www.sfbayferry.com/routes-schedules/vallejo/
• The Highway 37 Napa River Bridge, approximately a 2.6‑mile detour
• People with disabilities are encouraged to visit our City's ADA web page, email ada@cityofvallejo.net, or contact the Public Works Department’s general line (707) 648-5235 for assistance.

All vehicular traffic will remain unaffected outside the October 17 full‑bridge closure.

The City of Vallejo appreciates the community’s understanding and cooperation as we complete this critical infrastructure project. These improvements will help ensure the long‑term safety and reliability of one of our city’s key transportation links.

Safety Notice UPDATE: Mare Island Causeway Bridge Temporary Pedestrian & Bicycle Closure

The City of Vallejo is issuing an updated notice regarding the temporary closure of the Mare Island Causeway Bridge to pedestrians and bicyclists. Due to technical delays, the closure will now begin at noon on October 6 and continue through October 23, 2026, to allow crews to perform essential bridge‑deck maintenance.

To reduce impacts, the closure will take place only on weekdays.

• Reopens each Friday at approximately 5:15 PM
• Closes again each Monday at approximately 7:00 AM
• Open every Saturday and Sunday

During weekday work hours (7 AM to 5 PM), crews will apply polyester concrete and methacrylate—high‑performance materials that strengthen and extend the life of the bridge. These products contain chemicals classified as carcinogenic and may produce strong odors that could cause headaches, nausea, or irritation. For the safety of all pedestrians and bicyclists, the bridge and the trails beneath it will remain fully closed while this work is underway.

The City also advises open‑deck boats to avoid passing under the bridge between 7 AM and 5 PM, Monday through Friday, for the duration of the project.

Additionally, the bridge will be closed to ALL traffic—pedestrians, bicyclists, vehicles, and marine—on Saturday, October 17, 2026, from 9 AM to 3:45 PM to address an urgent corrective maintenance issue. The east side of the span has developed a mechanical imbalance causing a vertical misalignment (span skew). Due to the nature of these repairs, a full closure is required. Vehicular traffic entering Mare Island will be rerouted to the Highway 37 Napa River Bridge during this closure.

Alternative routes for pedestrians and bicyclists include:

• The San Francisco Bay Ferry (Mare Island to Vallejo terminal); their schedule is available at https://www.sfbayferry.com/routes-schedules/vallejo/
• The Highway 37 Napa River Bridge, approximately a 2.6‑mile detour
• People with disabilities are encouraged to visit our City's ADA web page, email ada@cityofvallejo.net, or contact the Public Works Department’s general line (707) 648-5235 for assistance.

All vehicular traffic will remain unaffected outside the October 17 full‑bridge closure.

The City of Vallejo appreciates the community’s understanding and cooperation as we complete this critical infrastructure project. These improvements will help ensure the long‑term safety and reliability of one of our city’s key transportation links.

Safety Notice UPDATE: Mare Island Causeway Bridge Temporary Pedestrian & Bicycle Closure Begins Oct. 5

The City of Vallejo is updating the notice for residents and visitors of a temporary closure of the Mare Island Causeway Bridge to pedestrians and bicyclists from October 5 through October 23, 2026, due to essential bridge‑deck maintenance.

To minimize impacts, the closure will occur Monday through Friday only during the project period.

• Reopens each Friday at approximately 5:15 PM
• Closes each Monday again at approximately 7:00 AM
• Open every Saturday and Sunday

During weekday work hours (7 AM to 5 PM), crews will apply polyester concrete and methacrylate, which are high‑performance materials critical for strengthening and preserving the bridge. These products, however, contain chemicals classified as carcinogenic and can produce strong odors that may cause headaches, nausea, or irritation for individuals nearby. For the safety of all pedestrians and bicyclists, all access on the bridge and the trails beneath it will be closed while work is underway.

The City also advises open‑deck boats to avoid passing under the bridge between 7 AM and 5 PM, Monday through Friday, throughout the project for the same safety reasons.

Alternative routes for pedestrians and bicyclists include:

• The San Francisco Bay Ferry (Mare Island to Vallejo terminal); their schedule is available at https://www.sfbayferry.com/routes-schedules/vallejo/
• The Highway 37 Napa River Bridge, approximately a 2.6‑mile detour
• People with disabilities are encouraged to visit our City's ADA web page, email ada@cityofvallejo.net, or contact the Public Works Department’s general line (707) 648-5235 for assistance.

All vehicular traffic will remain unaffected, and drivers may continue using the bridge as usual.

The City of Vallejo appreciates the community’s cooperation and understanding as we complete this vital infrastructure upgrade. This work is an important investment in the long‑term safety and reliability of one of Vallejo’s key transportation corridors.

Safety Notice: Mare Island Causeway Bridge Pedestrian & Bicycle Closure Begins Oct. 5

The City of Vallejo is committed to keeping our community informed and safe. Please be advised that the Mare Island Causeway Bridge will be closed to pedestrians and bicyclists from October 5, 2026, through October 23, 2026 due to essential work taking place on the bridge deck.

During this period, crews will be applying polyester concrete and methacrylate materials—high‑performance products that are crucial for strengthening and extending the life of the bridge. While this work is important, the materials used are classified as carcinogenic and contain chemicals that may pose health risks to individuals in close proximity. These substances produce a strong, sharp odor when applied, which can lead to headaches, nausea, and irritation of the eyes, skin, or respiratory system.

To protect the wellbeing of our residents and visitors, all pedestrian and bicycle access on the bridge, as well as all trails located underneath it, will be temporarily closed during the operation. This closure is a proactive measure to prevent exposure and ensure the safety of everyone in our community.

Please note that vehicular traffic will continue to be permitted, and drivers should expect to use the bridge as normal throughout the project timeline.

We appreciate the community’s cooperation and understanding as we complete this important infrastructure improvement. The City remains dedicated to maintaining safe, reliable transportation routes for all.

Safety Notice: Mare Island Causeway Bridge Pedestrian & Bicycle Closure Begins Oct. 5

The City of Vallejo is committed to keeping our community informed and safe. Please be advised that the Mare Island Causeway Bridge will be closed to pedestrians and bicyclists from October 5, 2026, through October 23, 2026 due to essential work taking place on the bridge deck.

During this period, crews will be applying polyester concrete and methacrylate materials—high‑performance products that are crucial for strengthening and extending the life of the bridge. While this work is important, the materials used are classified as carcinogenic and contain chemicals that may pose health risks to individuals in close proximity. These substances produce a strong, sharp odor when applied, which can lead to headaches, nausea, and irritation of the eyes, skin, or respiratory system.

To protect the wellbeing of our residents and visitors, all pedestrian and bicycle access on the bridge, as well as all trails located underneath it, will be temporarily closed during the operation. This closure is a proactive measure to prevent exposure and ensure the safety of everyone in our community.

Please note that vehicular traffic will continue to be permitted, and drivers should expect to use the bridge as normal throughout the project timeline.

We appreciate the community’s cooperation and understanding as we complete this important infrastructure improvement. The City remains dedicated to maintaining safe, reliable transportation routes for all.

See the full press release here: https://conta.cc/4dQeaiS

The Vallejo Public Works Department is excited to announce that major street paving work is about to begin on several key roads throughout the City starting October 6. After a summer of preparing curbs and gutters along the project routes, crews are now ready to move into the final phase: laying down fresh, smooth asphalt.

These early preparations are critical to building long‑lasting streets. Curbs and gutters do more than frame a roadway; they provide the strong concrete edge that keeps asphalt from shifting, cracking, and crumbling under the weight of everyday traffic. They also set the correct slope so rainwater flows safely into storm drains, reducing flooding and protecting the road structure beneath. A tight, clean connection between the asphalt and gutter helps prevent water intrusion that can lead to erosion and major potholes. In addition, Title II of the Americans with Disabilities Act (ADA) of 1990 requires cities to install or upgrade curb ramps to meet ADA standards whenever roadways are repaved or resurfaced. This ensures our infrastructure is more accessible and inclusive with every project.

In short, when the groundwork is done right, Vallejo’s roads stay smoother for longer, and that’s exactly what this project aims to deliver.

This project marks a major investment in the future of Vallejo’s streets. $6.3 million is dedicated to creating smoother, safer routes for our community. And we’re not stopping there. This year, Public Works will deliver a total of $15.3 million in Measure P–funded improvements across the city, pushing forward our commitment to better infrastructure and better mobility for everyone.

Below is the list of streets scheduled for repaving as part of the 2026 project.

Alameda St from Georgia St to Solano Ave

Redwood St from Sonoma Blvd/State Rt 29 to Broadway

Tennessee St from Monterey St to Mariposa St

Tennessee St from Oakwood Ave to Columbus Parkway

Georgia St from Cedar St to Maple Ave

Georgia St from Oakwood Ave to Rollingwood Dr

Georgia St at the intersection of Steffan St

Mare Island Causeway Bridge Update

Repair work on the Mare Island Causeway Bridge is once again moving at full speed after a temporary slowdown prompted by nearby nesting activity of the California Black Rail, a threatened native species. With the birds’ nesting season now concluded, crews have resumed full operations on the long‑running restoration effort.

The project continues to make steady progress, with several key milestones recently completed:

• Sidewalk installation is now completed.
• Work has shifted to the north side of the bridge for Stage 3, where crews have begun guardrail post repairs and installations.
• Broken bearing plate anchor bolts beneath the bridge deck have been removed and replaced.
• A new curb ramp has been installed at the west end of the bridge.
• Installation of the bridge logo is planned for late November or early December.
• Polyester concrete work is tentatively scheduled for October 1–16, 2026. During this period, pedestrian and bicycle access across the bridge will be restricted. The City will announce firm dates once confirmed.

At this stage, the project is approximately 68 percent complete. The anticipated completion date remains March 2027.

The City will continue to provide regular updates as construction advances.

Repair work on the Mare Island Causeway Bridge continues to experience temporary delays due to nearby nesting activity from the California Black Rail, a threatened native species. The birds’ nesting season concludes at the end of this month, and full work operations will resume on September 1.

Below is a detailed update on project tasks and overall progress.

• Painting of the lift towers is now fully complete.
• The lift span is operating on its normal schedule with no time restrictions, as directed by the U.S. Coast Guard.
• Sidewalk installation remains slowed due to the nesting‑season limitations established by the California Department of Fish and Wildlife.
• Installation of light posts and light poles on the south side of the bridge is complete.
• Installation of the bridge logo has been delayed to November/December 2026, dependent on the completion of other work.
• Guardrail post installation and handrail painting on the south side are approximately 70 percent complete.
• Working under the bridge to install and repair/secure bolt connections to the pier abutments remains ongoing.

At this time, the project remains approximately 65 percent complete, and the projected completion date continues to be March 2027.

The City will continue providing updates as work progresses.

Repair work on the Mare Island Causeway Bridge has slowed temporarily due to nearby nesting activity from the California Black Rail, a threatened native species. The birds are currently nesting in the adjacent wetlands, and environmental requirements limit the construction activities that can take place during this period. In coordination with the California Department of Fish and Wildlife, the City has retained a biologist to monitor the nesting of the birds who will determine when the birds have cleared the area so full operations can resume.

Below is a detailed update on project tasks and overall progress.

Painting of the lift towers is now fully complete. Beginning July 1, 2026, the lift span is operating on its normal schedule with no time restrictions, as directed by the U.S. Coast Guard.

Sidewalk installation is moving slowly due to nesting season limitations established by the California Department of Fish and Wildlife. Additional delays have resulted from issues such as Island Energy cable conflicts, weather, and materials.

Installation of light posts and light poles on the south side of the bridge is complete.

Installation of the bridge logo is rescheduled for September 2026.

Guardrail post installation and handrail painting on the south side are approximately 70 percent complete.

Work beneath the bridge deck and on the deck surface remains ongoing.

At this time, the overall project is approximately 65 percent complete. The projected completion date has shifted from mid-February 2027 to March 2027.

The City will continue providing updates as work progresses.