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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 is replacing the railroad bridge over San Juan Creek in the City of San Juan Capistrano.

The project is constructing 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

San Juan Creek Trail Closure Update

What: The San Juan Creek Trail between Camino Capistrano and Trabuco Creek is expected to close during the workday for approximately two weeks. This closure would allow crews to safely stage equipment and materials, while placing rock slope protection along the embankment from outside the San Juan Creek.

The San Juan Creek Trail between Camino Capistrano and Trabuco Creek is expected to close during the workday for approximately two weeks. This closure would allow crews to safely stage equipment and materials, while placing rock slope protection along the embankment from outside the San Juan Creek.

When: The trail is expected to close as early as Thursday, Sept. 24, for approximately two weeks during construction, between 6:30 a.m. and 4:30 p.m., Monday through Friday. The trail is expected to reopen at the end of each workday and remain open on weekends.

The schedule is subject to change due to inclement weather or unforeseen operational issues.

San Juan Creek Detour Map

Current San Juan Creek Construction Activities

San Juan Creek Activities

Crews are completing final in-creek activities within San Juan Creek, including slope restoration, drainage improvements, foundation work and site cleanup. Crews are expected to work within the creek on Saturday, Sept. 12, from 6:30 a.m. to 7:00 p.m. as crews prepare to transition outside the creek.

Construction equipment will continue to access the work area via Camino Capistrano and exit via Stonehill Drive. Water trucks will remain in use along the haul route to help minimize dust.

Sheet Pile Installation

Sheet pile installation is continuing with crews working from the top of the creek. Work hours are Monday through Friday, from 6 a.m. to 6 p.m. and this work is expected to continue intermittently through early 2027.

This work may be loud. The surrounding community may experience intermittently construction noise and vibration during sheet pile installation. The schedule is subject to change due to inclement weather or unforeseen operational issues.

Pile Installation

Latest Activity



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September 11, 2026
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September 4, 2026
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August 28, 2026
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August 21, 2026

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 SJCBridge@octa.net.