Adobe Road & Main Street Intersection Improvement Project


SCH Number
Lead Agency
Sonoma County
Document Title
Adobe Road & Main Street Intersection Improvement Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Road Right of Way
Document Description
At the intersection of Adobe Road and Main Street/Petaluma Hill Road in unincorporated Penngrove, construct a dedicated right turn lane for westbound vehicles on Adobe Road turning right on to northbound Petaluma Hill Road which requires widening the road extending a box culvert and constructing a retaining wall. In addition, the project will construct a dedicated left turn lane for northbound vehicles on Main Street turning left on to westbound Adobe Road within the existing pavement limits. Included in the project is upgrading curb ramps and pedestrian landings to the latest American’s with Disabilities Act (ADA) requirements and installation of bike lanes in accordance with the latest Sonoma County Bike and Pedestrian Plan.

Contact Information

Hunter McLaughlin
Agency Name
Sonoma County Public Infrastructure
Job Title
Assistant Engineer
Contact Types
Lead/Public Agency / Project Applicant


unincorporated area
Cross Streets
Adobe Road and Main Street/Petaluma Hill Road
Other Location Info
unincorporated Penngrove, Sonoma County

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Fish and Wildlife, Bay Delta Region 3 (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), Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Rights
Development Types
Transportation:Local Road (intersection improvement project)
Local Actions
intersection improvement project
Project Issues
Air Quality, Biological Resources, Cultural Resources, Transportation, Tribal Cultural Resources
Local Review Period Start
Local Review Period End


Notice of Completion [NOC] Transmittal form

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