Son 1 Drainage System Restoration Project


SCH Number
Lead Agency
California Department of Transportation, District 4 (DOT)
Document Title
Son 1 Drainage System Restoration Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Transportation Corridor
Document Description
The proposed Project is located in Sonoma County, California, on SR 1 from PM 51.1 to 56.4. The Project proposes to replace 15 existing damaged or failed culverts from Moonraker Road to 2.2 miles south of Gualala River. At each location, the main culvert pipe would be removed and replaced with a new pipe of the same or larger size, and some locations would include adding Flared End Sections, regrading, and constructing a new headwall for the culvert inlet.

Contact Information

Katherine Neylan
Agency Name
Job Title
Environmental Scientist
Contact Types
Lead/Public Agency


Citywide, Countywide, Northern California, San Francisco Bay Area
Other Location Info
SR 1 from PM 51.1 to 56.4

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Coastal Commission (CCC), 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 Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, North Coast Region 1 (RWQCB), California State Lands Commission (SLC), California Transportation Commission (CATC), Office of Historic Preservation, State Water Resources Control Board, Division of Water Quality
Development Types
Transportation:Highway/Freeway (State Route 1)
Local Actions
Site Plan, Coastal Permit
Project Issues
Aesthetics, Agriculture and Forestry Resources, Biological Resources, Coastal Zone, Cultural Resources, Drainage/Absorption, Energy, Greenhouse Gas Emissions, Hazards & Hazardous Materials, Hydrology/Water Quality, Mandatory Findings of Significance, Noise, Transportation, Utilities/Service Systems, Wetland/Riparian, Wildfire
Local Review Period Start
Local Review Period End


Notice of Completion [NOC] Transmittal form

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