I-680 Loop Detectors Replacement Project (EA 3X170)
Summary
SCH Number
2025120050
Public Agency
California Department of Transportation, District 4
(DOT)
Document Title
I-680 Loop Detectors Replacement Project (EA 3X170)
Document Type
NOE - Notice of Exemption
Received
Posted
12/2/2025
Document Description
Caltrans proposes replacing loop detectors at seven locations in Contra Costa County on Interstate (I-) 680 from post mile (PM) 13.68 to 18.70. The pavement will be cut with trench ground saws to allow inductive loops to be placed in the pavement. Existing electrical cabinets will be used to connect to the new loop detectors. Some project elements will occur off the paved roadway. Construction equipment to be used includes, but may not be limited to, asphalt concrete (AC) grinding and trenching rigs, trucks, sweepers, and hand tools. Construction is projected to begin in September of 2026. All work shall remain within Caltrans’ right of way (ROW) and equipment shall be staged within Caltrans’ ROW in areas absent of vegetation.
Contact Information
Name
Juliane Smith
Agency Name
Caltrans
Job Title
Senior Environmental Scientist (NEPA/CEQA Specialist)
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project
Address
Phone
Email
Location
Cities
Pleasant Hill, Walnut Creek
Counties
Contra Costa
Regions
Northern California, San Francisco Bay Area
State Highways
I-680
Other Location Info
The project is located at seven locations in Contra Costa County on I-680 from post mile (PM) 13.68 to 18.70.
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
PRC 21084; 14 CCR 15301 Class 1(d)
Reasons for Exemption
Class 1(d) Existing Facilities. The project is not anticipated to result in any environmental impacts. The project contains a number of standardized project measures which are employed on most, if not all, Caltrans projects and were not developed in response to any specific environmental impacts resulting from the project.
County Clerk
Contra Costa
Attachments
Notice of Exemption
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