State Route 4 Culvert Replacement

Project Description

Caltrans proposes to rehabilitate or replace existing culverts on State Routes 4, 88, and 89 in Alpine County. Existing drainage systems at the proposed locations have exceeded their design life and have deteriorated or failed. Certain culverts would be replaced with the existing size, and others would be upsized to maintain the existing water flow capacity. The project would also upgrade or replace end treatments and headwalls as needed. To maintain and upgrade the existing facilities, work off the paved roadway, ground disturbance, work in the channel, and vegetation removal would be required. Permanent right-of-way acquisition, temporary construction easements, and work on federal lands would also be required.


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Project Benefits


The purpose of the project is to maintain existing drainage systems and preserve roadway integrity.


Culverts in the system have exceeded their design life and show extensive wear with deteriorated, corroded, and damaged inverts, shape loss, and joint separation. The Maintenance Engineering Culvert Inspection Team reported that several existing culverts need repairs or replacement. If these culverts continue to deteriorate, undermining of the roadways will occur, and highways will be compromised.


Project Cost/Programmed

 Programed Project Cost Capital $ Support $
Project Approval & Environmental Document $0 $1,328,000
Plans, Specifications, & Estimates $0 $840,000
Right of Way $395,000 $642,000
Construction $3,320,000 $1,226,000


Current Schedule

 Process Date
Project Study Report (M010) Fall 2018 (Actual)
Project Approval & Environmental Document (M200) Fall 2022
Right of Way Certification (M410) Winter 2025
Ready – to – List (M460) Winter 2025
Approved Construction Contract (M500) Fall 2025
Project Completion (M600) Summer 2027


Project Contact

District 10 Public Information Office
Phone:  (209) 948-3849



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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.