I-5 Stockton Channel Viaduct Bridge Improvements

Project Facts


The California Department of Transportation (Caltrans) will replace the northbound and southbound Stockton Channel Viaduct Bridges (Bridge Numbers 29-0176L and 29-0176R) in the City of Stockton on Interstate 5 from post miles 26.1 to 27.6.

Stockton Channel Viaduct Bridge Improvement Project Information Sheet - English (PDF) 581K

Stockton Channel Viaduct Bridge Improvement Project Information Sheet - Spanish (PDF) 672K

Graphic of project location map

Project Benefits

Purpose: The purpose of the project is to ensure the long-term serviceability and structural integrity and improve the permit load rating of the Stockton Channel Viaduct Bridges (Bridge Numbers 29-0176L and 29-0176R) on Interstate 5 in San Joaquin County.

Need: The project is needed because of structural deficiencies and continued bridge repairs. The bridges show concrete and steel superstructure/foundation deficiencies. The deficiencies include a long-standing issue of concrete deck deterioration resulting in ongoing maintenance challenges, freckled rust forming at various locations throughout the superstructure steel elements, damaged steel bracing, and cracking in the concrete retaining walls, bents, and columns. Substructure deficiencies, such as soil liquefaction potentially caused by seismic activity, are also prevalent. Additionally, the current structures are not rated to accommodate permit loading, which is required for goods movement.

Estimated Funding Breakdown

Funding Sources:

  • Local: Not Available

  • State: State Highway Operation and Protection Program (SHOPP)

  • Federal: Yes

  • Capital Construction Cost (Construction and Right-of-Way):

 Alternative 3: $407.3 Million


(San Joaquin Council of Governments, City of Stockton, Federal Highway Administration, U.S. Coast Guard, Environmental Resource Agencies)

Proposed Project Schedule

Final environmental document completed: April 2021

Right-of-way acquisition to be completed: Phase 1: August 2024/Phase 2: February 2027

Circulate draft environmental document: February 2021

Project approval and environmental document: 6/30/2021 (Actual)

Right-of-Way Certification*:

  • Phase 1: August 30, 2024

  • Phase 2: February 20, 2027


  • Phase 1: September 30, 2024

  • Phase 2: March 30, 2027

    Approved Construction Contract*:

  • Phase 1: May 30, 2025

  • Phase 2: August 30, 2027

    Project Completion*:

  • Phase 1: August 30, 2027

  • Phase 2: November 30, 2029

*        Note: These scheduled dates are proposed for split-phased construction projects using traditional design-bid-build delivery.


PROJECT STATUS: Project Approval and Environmental Document

  • Initiated environmental studies—Submitted Notice of Intent/Notice of Preparation—Completed.

  • Environmental cleared land-based geotechnical exploratory drilling, drilling—Completed.

  • Prepared roadway—traffic operations concept; develop traffic operations analysis.

  • A minimum cost alternative to retrofit structure was added in January 2020.

  • Advance planning estimates have been developed for three structure improvement strategies.

  • Completed value analysis process.

  • Environmental technical studies completed; U.S. Coast Guard has been engaged in the process.

  • Prepared draft environmental document/prepared draft project report—Completed.
  • A virtual open house was held on February 18, 2021
  • Target Project Approval and Environmental Document—Completed.

Project Contact Information

Project Manager: Dina EL-Nakhal 209-351-4432

Senior Generalist: C. Scott Guidi 209-990-5719

Public Information Office: Skip Allum 209-948-7977

Email: district10publicaffairs@dot.ca.gov


Final Initial Study with Proposed Mitigated Negative Declaration/ Environmental Assessment and Section 4(f) Evaluation - April 2021 (PDF) 22,021 KB

The Draft Project Report is available by request. To request a copy, please contact the Project Manager dina.el.nakhal@dot.ca.gov