State Route 12 Pavement Rehabilitation Project

Caltrans plans to rehabilitate pavement and improve infrastructure along State Route 12 between postmile 0.0 to 3.31 in Napa County and postmile 0.0 to 7.90 in Solano County, including drainage enhancements, installation of pedestrian islands, and updates to various system elements. The project is being evaluated under a proposed Negative Declaration, indicating that Caltrans anticipates no significant environmental impacts from the proposed work. Based on an Initial Study, the project is not expected to substantially affect aesthetics, agriculture, air quality, cultural resources, energy, geology, hydrology, land use, mineral resources, population, housing, public services, recreation, tribal cultural resources, utilities, wildfire risk, greenhouse gas emissions, hazards, noise, transportation, traffic, or biological resources. While the project may result in minor or less than significant effects in certain areas, it is not anticipated to trigger the need for an Environmental Impact Report. The project is formally listed under the title State Route 12 Pavement Rehabilitation Project with a forecast posting date of June 24, 2026, and is managed by Caltrans District 4 – Bay Area/Oakland. Public and agency comments may still influence the final determination of the Negative Declaration, and the decision is not yet final. The primary point of contact for environmental inquiries is Matthew Coughlin, Environmental Scientist, reachable via email or phone. The project’s official documentation and updates can be accessed through the provided online link.