State Route 140 Mariposa Pavement Preservation

Project Facts


The California Department of Transportation (Caltrans) proposes to extend the service life of State Route 140 from post miles 25.3 to 51.8 in Mariposa County and provide a smoother riding pavement surface by resurfacing the roadway with 0.25-foot of hot mix asphalt (Type A). The work would also replace non-standard guardrails and bridge approaches with concrete end blocks where appropriate. The project would improve drainage facilities within the existing right-of-way and install traffic monitoring devices such as traffic count stations, rumble strips and pavement delineation. Eleven culverts would be replaced at the following post miles: 38.07, 39.62, 44.39, 45.2, 45.67, 47.0, 47.19, 48.19, 49.2, 50.07 and 50.86. A new culvert would be installed at post mile 43.8. The project would improve non-standard dikes and rock slope protection.

location map

Project Benefits

Purpose: The purpose of the project is to improve drainage and restore the pavement surface on State Route 140 in Mariposa County. Existing cross drainage culverts under the route convey surface water collected along the right-of-way and protect against roadway flooding.

Need: Caltrans has identified deteriorating pavement on State Route 140 and 11 culvert locations that have deteriorated and show signs of corrosion and potential for failure. Also, Caltrans has identified standing water overflowing onto a traffic lane at a turn near post mile 43.80. If unaddressed, the pavement and drainage conditions may negatively impact the traveling public and lead to flooding and further infrastructure damage.

Estimated Funding Breakdown

Local: N/A
State: $2,916,000
Federal: $22,509,000
Construction Cost: $25,425,000


Proposed Project Schedule

Final Environmental document to be completed: 10/2020
Right of way acquisition to be completed: 3/2022
Design to be completed: 4/2022
Advertise: 7/2022
Construction to begin: 10/2022
Construction to be completed: 7/2024


Project Contact Information

Public Information Office: 1976 East Dr. Martin Luther King Jr. Blvd, Stockton, CA 95205

Phone: (209) 948-7977


Final Environmental Document: Initial Study with Proposed Negative Declaration - October 2020 (PDF) 2,694 KB