State Route 4 (East) Widening Project

7 Documents in Project


SCH Number
Lead Agency
Caltrans 4 (Oakland) (California Department of Transportation, District 4)
Document Title
State Route 4 (East) Widening Project
Document Type
NOD - Notice of Determination

Document Description
The California Department of Transportation (Caltrans) proposes to widen State Route 4 (SR4), its interchange, and local roadways from west of Loveridge Road (post mile (PM 23.5) to the Somersville Road interchange (PM 25.6). The project would widen SR4 from four lanes to an eight-lane facility. The road widening component of this project will require the extension of two culverts and the replacement of a third culvert. These culvert changes, as well as road widening activity, will result in permanent impacts to Kirker Creek, Old Kirker Creek, and the Los Medanos Waterway. Temporary stream diversions may be implemented at all three sites if water is present during construction. Wetlands located within the Department's riparian jurisdiction will be impacted by the widening and will be mitigated for as described in Mitigation and Monitoring plan for Jurisdictional Waters of the United States. A Biological Opinion (#1-1-05-F-0158) for the California red-legged frog was issued by the U.S. Fish and Wildlife Service on June 13, 2005 for this project. The California Department of fish and Wildlife is executing a Lake and Streambed Alteration Agreement Number 1600-2013-0105-3 pursuant to Section 1602 of the Fish and Game Code to the project Applicant, the California Department of Transportation as represented by Jeffrey G. Jensen.

Contact Information
Melissa Escaron
California Department of Fish and Game
Bay Delta Region 7329 Silverado Trail
Napa, CA 94558

Phone : (925) 786-3045


Antioch Pittsburg
Contra Costa
Cross Streets
0.8 mile west of Loveridge Road to 0.7 mile eastof Hillcrest Avenue
Total Acres
6.46 lin. mi.
State Highways
Martin Luther King Children's Center and Preschool, Los Medanos
West Kirker Creek, Unnamed Drainage (east of Loveridge), East Kirker Creek, West Antioch Creek,
Other Information
Schools: College, Turner ES, Marsh ES, Live Oak Continuous School, Bidwell ES, Park MS, Belshaw ES, Christian HS, Promised Land Christian School, Cornerstone Christian School, Hilltop Christian School, Stepping Stones Academy Waterways: Los Medanos Wasteway, Markley Creek

Notice of Determination

Approving Agency
California Department of Fish and Wildlife
Approving Agency Role
Responsible Agency
Approved On
Final Environmental Document Available at


(1) The project will have a significant impact on the environment
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
(3) Mitigated measures were made a condition of the approval of the project
(4) A mitigation reporting or monitoring plan was adopted for this project
(5) A Statement of Overriding Considerations was adopted for this project
(6) Findings were made pursuant to the provisions of CEQA

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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