Westport Emergency Slide Repair
Summary
SCH Number
2025030293
Public Agency
California Department of Transportation, District 1
(DOT)
Document Title
Westport Emergency Slide Repair
Document Type
NOE - Notice of Exemption
Received
Posted
3/10/2025
Document Description
Postmiles 75.0 and 76.5 on State Route 1. This area has undergone a series of emergency repairs dating back to 2005. Work under this current emergency was initiated under Governor’s proclamation 23-3. On March 1, 2023 following a period of heavy rainfall, the area began to show severe roadway structure distress, along with accelerated coastal erosion. Several nested slides throughout the site have also developed, along with additional movement of the larger landslide complex. Work has been ongoing, including installation of additional Soldier Pile Ground Anchor Walls (SPGA), roadway profile correction, and geotechnical investigations to help inform the minimum repairs necessary along with potential long-term solutions. Work also entailed developing a structural shore protection analysis to help inform the beach revetment portion of this emergency.
Apart from the SPGA walls, two other critical components of work that define the minimum necessary effort to address the immediate threat to the highway and associated facilities include a coastal rock revetment at the toe of the slope to help minimize coastal erosion and mass wasting on the bluff face, along with a dewatering strategy to reduce hydrostatic load of the landslide. Geotechnical work to inform the dewatering strategy is ongoing, and the rock revetment at the toe of the slope is scheduled to begin in April of 2025.
The purpose of this emergency project is to employ a three-part strategy that includes installation of additional SPGA walls, coastal rock revetment and a dewatering strategy to help address the immediate threat and limit the frequency and magnitude of degradation of the highway and associated facilities. This project is needed to prevent or mitigate the loss or impairment of life, health, property, and essential services.
Contact Information
Name
Dominic Vitali
Agency Name
Caltrans District 1
Job Title
Senior Supervising Environmental Scientist
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project / Responsible Agency
Phone
Location
Counties
Mendocino
Regions
Northern California
Zip
95488
Total Acres
N/A
Jobs
1
Parcel #
015-010-31-00; 015-010-33-00
State Highways
State Route 1
Notice of Exemption
Exempt Status
Declared Emergency
Type, Section or Code
Sec. 21080(b)(3); 15269(a)
Reasons for Exemption
This emergency project was initiated under Governor’s proclamation 23-3. On March 1, 2023, following a period of heavy rainfall and accelerated coastal erosion, the area began to show severe roadway structure distress, along with distress to the existing SPGA walls. Work began shortly after the storm event and has been ongoing. The current stress and damage to the facility represents an imminent threat to the public. Work is deemed to be the minimum necessary to maintain State Route 1. This project is needed to prevent or mitigate the loss or impairment of life, health, property and essential public services.
Attachments
Final Document(s) [Approved_Certified draft environmental documents]
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