Iron Horse Trail bridge closing for rehab work starting Oct. 5

The Iron Horse Trail bridge over Treat Boulevard in Diablo Valley will be closed for rehabilitation starting Monday, October 5, 2026, and is expected to remain closed through Thursday, December 31, 2026. This closure will impact both pedestrians and cyclists who frequently use the trail, necessitating the use of alternative routes during the construction period. The rehabilitation project aims to address the wear and tear on the bridge, ensuring its longevity and safety for the community.

The closure will significantly affect local commuters and trail users, as pedestrian and bicycle traffic will be redirected to the existing street crossing on Treat Boulevard. This change could increase the risk of accidents and alter the daily routines of many residents. Additionally, drivers can anticipate delays and occasional lane closures on Treat Boulevard, which may disrupt morning and evening commutes for those traveling through the area. The increased traffic on the street crossing could also pose safety concerns for pedestrians and cyclists, making it crucial for all users to exercise caution and be aware of the new conditions.

The rehabilitation work is part of a broader effort by Contra Costa County to maintain the infrastructure of the Iron Horse Trail, a popular recreational path that stretches through Diablo Valley. The bridge, known as the Robert I. Schroder Pedestrian Bridge, has seen significant use since its construction and requires maintenance to ensure its longevity and safety. The project will include replacing bearing pads, performing paint repairs, treating the bridge deck, and replacing the sidewalk and curb. These improvements are necessary to address the structural wear and tear that the bridge has experienced over the years, ensuring that it remains a safe and reliable part of the trail system for years to come.

Construction will take place between 9:00 p.m. and 5:00 a.m., Sunday through Thursday, excluding holidays, weather permitting. Drivers can expect 10-minute delays on Treat Boulevard during construction, with occasional lane closures. Approximately four nighttime road closures on Treat Boulevard will also be required for bearing pad replacement work, with an approximate five-mile traffic detour. Funding for the project is provided by Measure X Funds and Park Dedication Funds, ensuring that the necessary resources are available for the rehabilitation work.

Residents can follow updates on the project through the Contra Costa County website, where detailed information and progress reports will be posted. For those affected by the closure, the county advises planning alternative routes and being prepared for potential delays. The community is encouraged to stay informed and participate in any public forums or updates that may be scheduled during the construction period. By staying engaged, residents can help ensure a smooth transition and successful completion of the rehabilitation project. For more details, visit the Robert I. Schroder Pedestrian Bridge Rehabilitation Project page.