State Route (SR) 37 Sears Point to Mare Island Improvement Project

4 Documents in Project


SCH Number
Lead Agency
California Department of Transportation, District 4 (DOT)
Document Title
State Route (SR) 37 Sears Point to Mare Island Improvement Project
Document Type
FON - FONSI - Findings of No Significant Impact
Document Description
Reconfigure the existing SR 37 highway lanes from west of the SR 121 intersection to the Walnut Ave Overcrossing at Mare Island. The project would widen the Tolay Creek Bridge; have four lanes (two full-time lanes in each direction); have 8-foot shoulders (except at Sonoma Creek Bridge, which would have 4-foot shoulders); and would widen the Sonoma Creek Bridge. In each direction the existing lane would be converted to a full-time HOV lane and the added lane would be a toll lane.

Contact Information

Cody Ericksen
Agency Name
California Department of Transportation (Caltrans) District 4
Job Title
Senior Environmental Scientist
Contact Types
Lead/Public Agency / Project Applicant


Napa, Solano, Sonoma
Cross Streets
SR 37 between SR 121 and the Mare Island Interchange
State Highways
State Route 37
Sonoma-Marin Area Rail Transit
Tolay Creek, Sonoma Creek, Napa River
Other Location Info
Along approximately 10 miles of SR 37, from post mile 2.9-6.2 in Sonoma County, post mile 0.0-R7.4 in Solano County, and post mile 0.0-0.2 in Napa County

Notice of Completion

State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Fish and Wildlife, Marin Region 7 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Transportation, District 4 (DOT), California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), California State Lands Commission (SLC), California Transportation Commission (CATC), Department of Toxic Substances Control, Office of Historic Preservation, San Francisco Bay Conservation and Development Commission (BCDC), State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Quality
Development Types
Local Actions
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Economics/Jobs, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire


Draft Environmental Document [Draft IS, NOI_NOA_Public notices, OPR Summary Form, Appx,]
Final Document(s) [Approved_Certified draft environmental documents]

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, 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. For more information, please visit OPR’s Accessibility Site.

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