CAL 4 Culvert Replacement

Project Description

The California Department of Transportation (Caltrans) proposes to replace 22 culverts that have exceeded their design life expectancy along State Route 4 and State Route 49 in Calaveras and Tuolumne Counties, respectively. The proposed culvert restoration methods include replacing the deteriorated culverts with reinforced concrete pipe, installing inlet and outlet end treatments consisting of flared end sections, and installing concrete headwalls, concrete wing walls, and rock slope protection. The work will include excavating existing culverts, jacking and boring for deeper culverts, backfilling, concrete casing, paving, installing rock slope protection at outlets, repairing or replacing headwalls, and re-striping. Temporary construction easements and permanent right-of-way easements are expected at locations for construction and maintenance activities.


Location Map


Project Benefits


The purpose of this project is to improve the drainage systems to prevent flooding of the roadways, reduce culvert failures to prevent erosion of the soil below the pavement, and extend its service life. 


The project is needed to address the deteriorated culverts caused by overuse and/or culverts that are past their design life.


Funding Source

Project is anticipated to be programmed in the 2020 State Highway Operation and Protection Program (SHOPP) program for delivery in FY 2023/24 with SB-1 Funding.


Project Cost/Programmed

Programed Project Cost
Capital $ Support $
Project Approval & Environmental Document $0 $1,298,000
Plans, Specifications, & Estimates $0 $987,000
Right of Way $418,000 $225,000
Construction $2,677,000 $1,134,000


Projected Cost as of (November 27, 2023) Planned $ Expended $
Project Approval & Environmental Document $1,298,000 $1,284,000
Plans, Specifications, & Estimates $987,000 $260,000
Right of Way $225,000 $200,000
Construction $1,134,000 $0


Current Schedule

Process Date
Project Study Report (M010) Fall 2018
Project Approval & Environmental Document (M200) Spring 2023
Right of Way Certification (M410) Spring 2024
Ready to List (M460) Summer 2024
Approved Construction Contract (M500) Winter 2024
Project Completion (M600) Summer 2026


Project Status

Project is currently in Plans, Specifications & Estimates (PS&E) phase.


Project Contact

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



Initial Study with Mitigated Negative Declaration - FINAL - December 2022  (PDF 2MB)


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.