State Route 4 / Main Street-Widening Project

2 Documents in Project


SCH Number
Lead Agency
Caltrans 4 (Oakland) (California Department of Transportation, District 4)
Document Title
State Route 4 / Main Street-Widening Project
Document Type
NEG - Negative Declaration

Document Description
The project is located along SR4/Main Street between Highway 160 and Big Break Road in the City of Oakley, in Contra Costa County. The City proposes to widen SR4/Main Street between southern ramp to Highway 160. Currently the street is a four-lane undivided roadway with two 12-feet wide lanes in each direction separated by a 10 feet median between 160 and Big Break Road. These two lanes in each direct will be widened to 3 lanes each direction each 12 feet in width and 14 feet median separation.

Contact Information
Howell Chan
111 Grand Avenue
Oakland, CA 94612

Phone : (510) 286-5623


Antioch Oakley
Contra Costa
Cross Streets
Between State Highway 160 and Big Break Road in Oakley, Antioch
State Highways
Hwy 4 & 160

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation:Local Road (widening Main Street)
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Economics/Jobs Flood Plain/Flooding Geologic/Seismic Minerals Noise Population/Housing Balance Public Services Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Land Use
Reviewing Agencies
Air Resources Board, Transportation Projects California Department of Fish and Wildlife, Bay Delta Region 3 California Department of Parks and Recreation California Native American Heritage Commission Central Valley Flood Protection Board Delta Protection Commission Delta Stewardship Council Department of Toxic Substances Control Department of Water Resources Office of Historic Preservation Resources Agency California Regional Water Quality Control Board, Central Valley Sacramento Region 5 California Highway Patrol

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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