US Route 101 East Washington Street Interchange

5 Documents in Project


SCH Number
Lead Agency
Caltrans 4 (Oakland) (California Department of Transportation, District 4)
Document Title
US Route 101 East Washington Street Interchange
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Transportation, Residential, Commercial, and Light Industrial

Document Description
Interchange improvements along the East Washington Street interchange portion of U.S. Route 101 in Petaluma, Sonoma County. The main elements of the project consists of reconfiguring the southbound on-ramp, widening the terminus of the northbound off-ramp from two lanes to four lanes, and adding a new northbound diagonal on-ramp with a new bridge to free-span Washington Creek.

Contact Information
RocQuel Johnson
California Department of Transportation, District 4
P.O. Box 23660
Oakland, CA 94623

Phone : (510) 622-8706


Cross Streets
Route 101 between Caulfield Lane and The Lynch Creek overcrossing
Total Acres
Parcel #
State Highways
Lynch Creek, Washington Creek

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation:Local Road (Operation improvement)
Project Issues
Aesthetic/Visual Air Quality Archaeologic-Historic Flood Plain/Flooding Geologic/Seismic Noise Soil Erosion/Compaction/Grading Toxic/Hazardous Traffic/Circulation Water Quality Water Supply Wetland/Riparian
Reviewing Agencies
Air Resources Board, Transportation Projects California Department of Conservation California Department of Fish and Wildlife, Bay Delta Region 3 California Department of Parks and Recreation California Highway Patrol California Native American Heritage Commission California Regional Water Quality Control Board, San Francisco Bay Region 2 Department of Water Resources Office of Historic Preservation Resources Agency Department of Toxic Substances Control

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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