Interstate 680/State Route 4 Interchange Improvement Project

8 Documents in Project


SCH Number
Lead Agency
Caltrans 4 (Oakland) (California Department of Transportation, District 4)
Document Title
Interstate 680/State Route 4 Interchange Improvement Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Existing highway right-of-way.

Document Description
The project would make five phases of improvements to the I-680/SR-4 interchange. New direct connectors would be added between northbound I-680 and westbound SR-4, eastbound SR-4 and southbound I-680, southbound I-680 and eastbound SR-4, and westbound SR-4 to northbound I-680. Some existing loop ramps will be removed and diagonal ramps will be widened. New lanes would be added to the median of eastbound and westbound SR-4 within the project limits.

Contact Information
Melanie Brent
Department of Transportation, District 4
P.O. Box 23660
Oakland, CA 94623-0060

Phone : (510) 286-6206


Contra Costa
Cross Streets
at I-680/SR-4 interchange
State Highways
Buchanan Field
Walnut and Grayson Creeks
Other Location Info
City/Nearest Community: Pacheco

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation:Highway/Freeway (Interchange)
Project Issues
Aesthetic/Visual Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Flood Plain/Flooding Geologic/Seismic Noise Public Services Soil Erosion/Compaction/Grading Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Wildlife Growth Inducing Land Use Cumulative Effects
Reviewing Agencies
Air Resources Board, Transportation Projects California Department of Fish and Wildlife, Bay Delta Region 3 California Department of Health Care Services California Department of Parks and Recreation California Highway Patrol California Native American Heritage Commission Caltrans, Division of Aeronautics Department of Toxic Substances Control Department of Water Resources Office of Historic Preservation Resources Agency California Regional Water Quality Control Board, San Francisco Bay Region 2

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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