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San Juan Creek Bridge Replacement Project

Construction Updates

The Orange County Transportation Authority (OCTA), in coordination with Metrolink, is replacing the railroad bridge over San Juan Creek. Built in 1917, the bridge has reached the end of its useful life and will be replaced by a new three-span girder bridge.

Project Details

SJC Bridge

The San Juan Creek Bridge Replacement Project will replace the railroad bridge over San Juan Creek in the City of San Juan Capistrano.

The project will construct a new three-span girder bridge west of the existing bridge. The new bridge will enhance safety, reduce maintenance needs, and meet current design and bridge load standards. The existing bridge will be demolished, and a new foundation and substructure will be installed for a potential future bridge. There are no plans to construct a second bridge but if a need arises, the supporting infrastructure will be in place.

The bridge serves Metrolink and Amtrak Pacific Surfliner passenger trains, as well as freight trains.

The project will also:

  •    Construct tracks
  •    Construct a new bikeway underpass
  •    Construct retaining walls
  •    Install new utilities and signals
  •    Remove vegetation

Construction Activities

Construction generally occurs on weekdays, Monday through Friday, between 6 a.m. and 5 p.m. Night and weekend work may be required for some activities.

Contractors are continuing to construct the bridge foundation and columns that will support the new railroad bridge. This activity is expected to continue through the end of July.

Drilling operations are underway as crews prepare to install the first of four piers, also referred to as bridge columns. This will require a full day of concrete pours, scheduled for Wednesday, July 10 from 6 a.m. to 6 p.m. Approximately 40 concrete trucks will be accessing the creek from Camino Capistrano and exiting at Stonehill Drive. No lane closures are anticipated during this activity.

This work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

Community Impacts

San Juan Creek Trail Closure

A segment of the San Juan Creek Trail/Vereda Bikeway is expected to close intermittently throughout construction to allow contractors to perform work around the bridge. The first full closure is anticipated to occur from July 18-26 to allow crews to construct an abutment for the new bridge. During this time, the trail will be closed to the public from Camino Capistrano to the pedestrian bridge over Trabuco Creek – refer to trail closure and detour map.

Trail users will be detoured to Camino Capistrano, Del Obispo Street, and Trabuco Creek Trail. The detour is the most direct route around the closure. Detour signs and informational signs will be installed prior to the closure. Bicyclists are encouraged to walk their bikes along Del Obispo Street.

Once the trail reopens, the contractor expects to continue working in the area and will need to briefly close the trail intermittingly through mid-August. Flaggers will be on site to manage trail traffic.

Train Horns

Federal Railroad Administration (FRA) guidelines require all trains to sound their horns when workers are present, in emergency situations or when there are trespassers on or around railroad tracks. This federal mandate applies to construction zones. As a result, for the safety of construction workers, train crews and passengers, and the public, horns will be sounded when trains pass through the area.

Additional Impacts

The public and businesses adjacent to the work area may experience noise and vibration from demolition and drilling activities as well as light from construction operations. Noise may also be generated from construction equipment back-up alarm. The alarms are required by state regulation.

SJC Bridge Detour Map
Community Outreach

The Public Outreach team regularly hosts project information booths at Descanso Park in San Juan Capistrano and Doheny State Beach in Dana Point.

In addition, the team participates in community events. The community is encouraged to stop by and ask questions or pick up project resources. Businesses or civic organizations that would like to receive a project presentation may email the team at

Our next booth will be at:

Descanso Park
32506 Paseo Adelanto, San Juan Capistrano
Saturday, July 13, 10 a.m. to 2 p.m.

Also, please join us at San Juan Summer Nites

Historic Town Center (HTC) Park
31852 El Camino Real, San Juan Capistrano
Wednesday, July 17, 6 p.m. to 8 p.m.

Latest Activity

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July 3, 2024
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June 28, 2024
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June 21, 2024
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June 14, 2024
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June 10, 2024
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May 31, 2024

Contact the Outreach Team

If you have any questions or would like to request information in another language, please contact the Outreach Team at (800) 724-0353 or email