SR-280 Bridge Pavement and Concrete Slope Repair DO (EA 04-0V020)
Summary
SCH Number
2026071040
Public Agency
California Department of Transportation, District 4
(DOT)
Document Title
SR-280 Bridge Pavement and Concrete Slope Repair DO (EA 04-0V020)
Document Type
NOE - Notice of Exemption
Received
Posted
7/27/2026
Document Description
Caltrans proposes repairing damaged pavement, concrete sidewalk, and concrete slope at the bridge approach and departure of Bridge #35-0008 on SR-280 in San Mateo County at post mile (PM) R1.61. The damaged was caused by erosion of the structural section supporting the infrastructure at the bridge.
Google Maps indicate the damage has existed for several years which has progressively worsened due to repeated rainstorms. The issue was recently brought to Maintenance Services’ attention because of the severity of the deterioration. The Damage Assessment Team recommends urgent repairs. If left unaddressed, continued water intrusion will further displace roadway subbase material supporting the sidewalk and slope paving, leading to increased erosion, debris migration toward the highway below, and potential pavement failure. Additionally, erosion adjacent to and beneath the sidewalk poses a safety concern for pedestrian travel. Further sidewalk failure would force pedestrians off the sidewalk and onto the pavement, requiring a 6–8-inch step down, making the route inaccessible for individuals using wheelchairs or motorized scooters.
The project will backfill the voids under the slope pavement at Abutments 1 and 5 with cement grout from the top and sides of the slope pavement. Imported borrow will be used to rebuild the subgrade under the sidewalk at Abutment 1. Expansion joints will be repaired and sealant applied. The failed curb, gutter, and pavement section will be replaced to keep stormwater from washing out the subsurface fill. The damaged roadway pavement will be ground and repaved. Erosion control measures will be implemented on the slope. Traffic control will be required during construction.
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
Menlo Park
Counties
San Mateo
Regions
Northern California, San Francisco Bay Area
State Highways
280
Other Location Info
The project is located at Bridge No. 35-0008 on State Route (SR-) 280 in San Mateo County at post mile (PM) R1.61, near the City of Menlo Park.
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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