SR-380 Joint Seal Assembly Repair DO (EA 1V080)
Summary
SCH Number
2026050476
Public Agency
California Department of Transportation, District 4
(DOT)
Document Title
SR-380 Joint Seal Assembly Repair DO (EA 1V080)
Document Type
NOE - Notice of Exemption
Received
Posted
5/12/2026
Document Description
The California Department of Transportation (Caltrans) proposes repairing a failed joint assembly on Eastbound State Route (SR-) 380 at the connector to Northbound US-101 (post mile 6.37) in San Mateo County. The existing elastomeric molded rubber expansion joint panels are showing signs of distress. Some anchor bolts are exposed, with some of the polyurethane header filler loose around the bolts. Panels make noise upon contact with tires, suggesting additional panels and/or headers are in distress. Field Maintenance removed the polyurethane header fillers and anchor bolt nuts which revealed that the joint seal panel was broken length-wise along the joint. The concrete headers on both sides are also broken to pieces, exposing bar reinforcing steel.
The project will install temporary steel plates over the failed joint seal assembly and implement traffic control. Temporary decking and temporary bracing (concrete barrier) will also be installed prior to construction. The damaged portions of the bridge and joint seal assembly will be removed and repaired/replaced. Once the structural concrete bridge sections, bonded joint seal, and bar reinforcing steel are repaired, the steel cover plate will be reconstructed.
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
South San Francisco
Counties
San Mateo
Regions
Northern California, San Francisco Bay Area
State Highways
380
Other Location Info
The project is located on eastbound SR-380 at the connector to northbound US-101 (post mile 6.37) in San Mateo County.
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
PRC 21084; 14 CCR 15301 Class 1
Reasons for Exemption
Class 1 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
San Mateo
Attachments
Notice of Exemption
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