Sonoma 1 Culvert Rehabilitation Project

5 Documents in Project


SCH Number
Lead Agency
California Department of Transportation, District 4 (DOT)
Document Title
Sonoma 1 Culvert Rehabilitation Project
Document Type
NEG - Negative Declaration
Present Land Use
Transportation Corridor
Document Description
The proposed project is located along State Route (SR) 1 in Sonoma County, California, from post mile (PM) 30.8 to 40.6. The scope of the project is to replace 23 existing damaged or failed culverts (from south to north) between Mill Gulch and 0.5 mile south of Miller Creek. The purpose of the project is to preserve the structural integrity of SR 1 within the project corridor and to prevent localized highway failures. The project is needed to replace 23 existing damaged or failed culverts that were determined to have deficiencies and require replacement to prevent further damage and possible failure of the highway. Addressing these deficiencies would prevent failure of the culverts and undermining of SR 1 or localized flooding and would avoid impacts to the safety of the traveling public.

Contact Information

Arnica MacCarthy
Agency Name
Caltrans District 4
Contact Types
Lead/Public Agency


Cross Streets
Fort Ross Rd., Rossen Rd., Timber Cove Rd., Ninive Dr., Lee Dr., Kelly Ct. , Ruoff Rd., Pacific
State Highways
Fort Ross School
Mill Gulch, Fort Ross Creek, Stockhoff Creek, and Timber Cove Creek

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
Air Resources Board, Transportation Projects, Cal Fire, California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Highway Patrol, California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, North Coast Region 1 (RWQCB), California State Lands Commission (SLC), Department of Toxic Substances Control, Department of Water Resources, Office of Historic Preservation, Resources Agency, State Water Resources Control Board, Division of Water Quality
Development Types
Transportation (Culvert Rehabilitation)
Local Actions
Coastal Permit
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Coastal Zone, Cultural Resources, Cumulative Effects, Drainage/Absorption, Geology/Soils, Greenhouse Gas Emissions, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Noise, Public Services, Transportation, Vegetation, Wetland/Riparian, Wildfire


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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