State Route 12 Jameson Canyon Road Widening & State Routes 29/12 Interchange Project

4 Documents in Project


SCH Number
Lead Agency
California Department of Transportation, District 4
Document Title
State Route 12 Jameson Canyon Road Widening & State Routes 29/12 Interchange Project
Document Type
FIN - Final Document
Present Land Use
Mostly Agricultural

Document Description
The California Department of Transportation (Caltrans) proposes to widen the two lane conventional highway State Route 12 (Jameson Canyon) to a four lane conventional highway and improve the intersection to State Routes 29 and 12 to an interchange. The project involves both Napa and Solano Counties. This project will reduce the existing traffic congestion by adding two lanes, thus solving existing operational problems along the Jameson Canyon Road. The intersection of State Routes 29 and 12 are substandard and Caltrans has proposed to improve it by either of two alternatives, single point interchange or tight diamond interchange.

Contact Information
Howell Chan
California Department of Transportation, District 4
Lead/Public Agency
111 Grand Avenue
Oakland, CA 94623

Phone : (510) 286-5623


Fairfield Napa
Napa Solano
Cross Streets
Interstate 80
State Highways
I-80, SR-29
Napa Airport
Jameson Canyon

Notice of Completion

Development Type
Transportation:Local Road (Widening Jameson Canyon Road & 29/12 interchange)
Local Action
Transportation Widening Project
Project Issues
Agriculture and Forestry Resources Air Quality Biological Resources Cultural Resources Cumulative Effects Economics/Jobs Flood Plain/Flooding Geology/Soils Growth Inducement Hazards & Hazardous Materials Hydrology/Water Quality Land Use/Planning Noise Population/Housing Public Services Recreation Transportation Vegetation Wetland/Riparian

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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