State Route 140 Slope Repair at post mile 32.2 in Mariposa County

Project Facts


Caltrans will repair the failed slope under and around an 84-inch reinforced concrete pipe culvert outlet apron at post mile 32.2 on eastbound State Route 140 in Mariposa County. The repair method will involve backfilling the eroded slope, using rock slope protection with rocks of adequate size at a 39-degree slope. Rocks would be imported from either the Ferguson Rockslide project or commercial materials, whichever is most feasible, and stored within the state’s right-of-way.

Project Map

Project Benefits

Purpose:  The purpose of this project is to prevent further erosion of the slope and protect the highway and associated culvert.

Need:  The need for this project is to restore the integrity of the reinforced concrete pipe culvert, which removes water and runoff, and to prevent further erosion at the outlet apron and wing wall.

Estimated Funding Breakdown

Local: N/A
State: SHOPP
Federal: Yes
Construction Cost: $2,800,000

Proposed Project Schedule

Final Environmental document to be completed: 01/2021
Right of way acquisition to be completed: N/A
Design to be completed: 05/2021
Advertise: 09/2021
Construction to begin:  12/2021
Construction to be completed: 07/2022

Project Contact Info

Project Manager:  Wuthy Seng

Senior Generalist:  C. Scott Guidi 209-990-5719

Public Information Office: Stockton Phone: 209-948-7977



Final Supplemental Initial Study Mitigated Negative Declaration -  January 2021 (PDF) 931 KB