Pocket Canyon Slip Out Repair DO (EA 3X570)
Summary
SCH Number
2025091307
Public Agency
California Department of Transportation, District 4
(DOT)
Document Title
Pocket Canyon Slip Out Repair DO (EA 3X570)
Document Type
NOE - Notice of Exemption
Received
Posted
9/29/2025
Document Description
Caltrans proposes repairing slip outs near Pocket Canyon on eastbound SR-116 in Sonoma County at post mile 15.40. The slip outs occurred during a large storm event, which caused erosion and displacement of soil, and led to instability and collapse of the roadway embankment. There is also a tree stump lodged at the southern edge of the creek path, which has undermined the toe of slope below the roadway. A 35-foot-long interlocking sheet pile wall will be installed nine feet outside of the fog line. The height of the sheet pile wall will be about 35-feet, including the embankment depth. The tope of the wall will be flush with the slope embankment. The area behind the sheet pile wall will be backfilled with cellular concrete non-standard special provision. Imported borrow will be placed over the cellular concrete and compacted to a minimum of 90% relative compaction. Cable railing will be constructed to protect pedestrians. Traffic control will be required during construction activities. A biological monitor will be present for all construction activities.
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 Sonoma County
Counties
Sonoma
Regions
Northern California, San Francisco Bay Area
State Highways
1
Other Location Info
The project is located near Pocket Canyon on eastbound SR-116 in Sonoma County at post mile 15.40.
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
Sonoma
Attachments
Notice of Exemption
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