HWY-1 Slope Erosion Repair DO (EA 4X500)
Summary
SCH Number
2025100944
Public Agency
California Department of Transportation, District 4
(DOT)
Document Title
HWY-1 Slope Erosion Repair DO (EA 4X500)
Document Type
NOE - Notice of Exemption
Received
Posted
10/21/2025
Document Description
Caltrans proposes repairing an eroded slope on Highway 1 that was caused by a storm event and the failure of a drainage ditch. The erosion is located on the east side of Highway 1, along the shoulder. The affected area is approximately 1100 square feet. The erosion has removed material from the slope, compromising both existing trees and the structural integrity of the slope. This condition poses a risk to the normal use of Highway 1 as a complete slope failure could lead to closure of this high-traffic route and potentially impact private residences located at the top of the slope. The work involves installing rock slope protection to stabilize the eroded section. Landscape erosion control measures will also be implemented to prevent further erosion. 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
Unincorporated San Mateo County (Montara)
Counties
San Mateo
Regions
Northern California, San Francisco Bay Area
State Highways
1
Other Location Info
The project is located on Highway 1 in San Mateo County from post mile 36.06 to 36.12.
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
San Mateo
Attachments
Notice of Exemption
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