State Route 26 Slope Stabilization

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Project Description

The California Department of Transportation proposes to stabilize deteriorating slopes and improve drainage on both sides of State Route 26 at eight locations in Calaveras County from about 5.4 miles west of Ridge Road to about the Amador County line (post mile 21.4 to post mile 38.31). The project will upgrade drainage in the project area with a combination of geotechnical, hydraulic, and landscape measures such as flattening cut slopes, refilling slopes that are collapsing, and stabilizing shoulders with a bonded fiber matrix of hydroseed and fiber roll. In addition, retaining walls will be constructed at five locations (Locations 2-6).

This project has two alternatives—a Build Alternative and a No-Build Alternative—that are being considered.

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Project Benefits


The purpose of the project is to lessen slope erosion that causes slope failure and slope erosion along the embankment of the eastbound and westbound lanes of State Route 26.


The rugged topography, limited state right-of-way, and environmental sensitivity of the Calaveras corridor pose challenges for the California Department of Transportation crews to keep this area maintained. Slope failures and soil erosion have occurred in the embankment of the eastbound and westbound lanes of State Route 26 over the last few years. Numerous maintenance tasks have been performed in the past decade to control erosion and improve slope stability and drainage along this corridor. The project is needed to protect the roadway’s numerous slopes within the project limits from continually eroding and collapsing.


Funding Source

State Highway Operation and Protection Program (SHOPP) Major Damage Permanent Restoration


Project Cost/Programmed

 Process Capital $ Support $
Project Approval & Environmental Document $0 $1,655,000
Plans, Specifications, & Estimates $0 $2,275,000
Right of Way $1,817,000 $240,000
Construction $10,548,000 $3,242,000


Projected Cost as of (December 2022) Planned $ Expended $
Project Approval & Environmental Document $1,655,000 $1,373,000
Plans, Specifications, & Estimates $2,275,000 $1,493,000
Right of Way Support $240,000 $115,000
Construction Support $3,242,000 $0


Current Schedule

 Process Date
Project Study Report (M010) Winter 2015
Project Approval & Environmental Document (M200) Winter 2021
Right of Way Certification (M410) Spring 2022
Ready to List (M460) Summer 2022
Approved Construction Contract (M500) Winter 2023
Project Completion (M600) July 2024


Project Status

Reprogrammed Ready to List date is 1/18/2024


Project Contact

District 10
Public Information Office: (209) 948-7543



Final Initial Study with Mitigated Negative Declaration - December 2020 (PDF) 2,786 KB


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.