I-5 Stockton Channel Viaduct Bridge Improvements

Stockton Channel Viaduct, Interstate 5, Stockton, California

Kiewit logo. Kiewit is the Contract Manager on this CMGC Project.

Project Description 

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.

Graphic of project location map


Project Benefits


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.


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.



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


Funding Source

State Highway Operation and Protection Program (SHOPP) - Bridge Preservation


Project Cost/Programmed

Programed Project Cost
Capital $ Support $
Project Approval & Environmental Document $0 $5,500,000
Plans, Specifications, & Estimates $0 $62,802,000
Right of Way $24,300,000 $1,100,000
Construction $0 $0


Projected Cost as of (December 2022) Planned $ Expended $
Project Approval & Environmental Document $0 $5,411,000
Plans, Specifications, & Estimates $0 $8,903,000
Right of Way Support $0 $0
Construction Support $0 $0


Current Schedule

Process Date
Project Study Report (M010) Spring 2015
Project Approval & Environmental Document (M200) Spring 2021
Right of Way Certification (M410) Spring 2025
Ready to List (M460) Spring 2025
Approved Construction Contract (M500) Spring 2026
Project Completion (M600) Fall 2031


Project Contact

Caltrans District 10 - Public Information Office
Phone: (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


Title VI Information

The California Department of Transportation (Caltrans) assures that no person shall, on the basis of race, color, or national origin, be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity receiving Federal financial assistance, as required by Title VI of the Civil Rights Act of 1964, as amended, the Civil Rights Restoration Act of 1987, and Federal Executive Order 12898 (Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations).

Caltrans will make every effort to ensure nondiscrimination in all of its programs and activities, whether they are federally funded or not, and that services and benefits are fairly distributed to all people, regardless of race, color, or national origin. In addition, Caltrans will facilitate meaningful participation in the transportation planning process in a nondiscriminatory manner.


Interested in providing sub-contracting services? For more information contact Traci Adams, Caltrans District 10, Small Business Liaison

Cell: (209) 986-3499 or Traci.Adams@dot.ca.gov