State Route 4 Delta Pavement Improvement Project

Project Description

This Capital Preventive Maintenance (CAPM) project on State Route (SR) 4 from Contra Costa County Line to 0.2 Mile East of South Whiskey Slough Road proposes to repair failed areas of pavement (dig outs) and then cold plane and overlay the existing pavement width from the eastbound edge of pavement (EP) to the west bound EP. Shoulder backing will be placed along the EPs in both directions. It also proposes to upgrade departure barriers, electrical elements of traffic management systems, lighting systems, and replace sign panels.


Project Benefits


The purpose of this project is to preserve and extend the life of the existing pavement as well as improving the ride quality. 


The project is needed because the pavement within the project limits is exhibiting major distress and unacceptable ride quality, which if left uncorrected, would continue to deteriorate.


Funding Source

This project is programmed in the 2022 State Highway Operation and Protection Program (SHOPP) with funding from the 201.121 Capital Preventive Maintenance (CAPM) Program in the 2025/26 fiscal year.


Project Cost/Programmed

Programed Project Cost Capital $ Support $
Project Approval & Environmental Document $0 $1,164,000
Plans, Specifications, & Estimates $0 $2,050,000
Right of Way $312,000 $47,000
Construction $14,165,000 $2,412,000


Projected Cost as of (November 30, 2023) Planned $ Expended $
Project Approval & Environmental Document $1,164,000 $553,000
Plans, Specifications, & Estimates $2,050,000 $0
Right of Way Support $47,000 $0
Construction Support $2,412,000 $0


Current Schedule

 Process Date
Project Study Report (M010) 06/08/2021
Project Approval & Environmental Document (M200) 11/17/2023
Right of Way Certification (M410) 04/10/2025
Ready to List (M460) 05/01/2025
Approved Construction Contract (M500) 02/02/2026
Project Completion (M600) 02/02/2027


Project Status

Project completed its Project Approval & Environmental Document phase and is currently waiting to be programmed, to begin its design phase in January 2024.


Project Contact

Caltrans District 10 - Public Information Office
Phone: (209) 948-7977


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.