Norris Canyon Road Slide Repair Project, WO4029, CP#25-17
Summary
SCH Number
2025080233
Public Agency
Contra Costa County
Document Title
Norris Canyon Road Slide Repair Project, WO4029, CP#25-17
Document Type
NOE - Notice of Exemption
Received
Posted
8/6/2025
Document Description
The purpose of this project is to repair an embankment failure and reconstruct the roadway to restore two-way
traffic to a stretch of Norris Canyon Road that was damaged during the 2023 winter storm events. The road is
currently limited to one lane for travel.
The embankment will be repaired by constructing a soldier pile wall and reconstructing a storm drain culvert.
The soldier pile wall will be approximately 278-feet long. The piles for the retaining wall will be set via drilling.
No pile driving will occur. The anticipated excavation depth is approximately 26 feet for the piles and
approximately 4 feet at the base of the retaining wall where the lagging will be installed. A guard rail will be
installed. Drainage improvements include approximately 300 LF of 18-inch reinforced concrete pipe, 18-inch
concrete flared ends, four inlets, and rock slope protection. The roadway thermoplastic striping will conform with
the existing striping. Equipment staging will likely occur adjacent to the slide as the road will be closed throughout
construction, and a detour via Crow Canyon Road and Bollinger Canyon Road will be utilized.
Appropriate Best Management Practices (BMPs) including but not limited to erosion control such as fiber rolls,
and hydroseeding temporarily disturbed areas will be implemented during construction. Regulatory permits will
be obtained before construction. Approximately 34 trees will be removed and approximately 14 trees will need
to be trimmed. Real property transactions, including right-of-way acquisition, will be necessary in support of this
project. Utility relocations may be needed. The project is anticipated to start in the summer of 2026 and take
approximately 55 days to complete. Traffic control signs will be placed before and during construction. No night
or weekend work is anticipated.
Contact Information
Name
Syd Sotoodeh
Agency Name
Contra Costa County Department of Conservation and Development
Job Title
Senior Planner
Contact Types
Lead/Public Agency
Phone
Name
Sandeep Kajla
Agency Name
Contra Costa County Public Works
Job Title
Project Manager
Contact Types
Lead/Public Agency / Project Applicant
Phone
Location
Cities
San Ramon
Counties
Contra Costa
Regions
Northern California, San Francisco Bay Area, Unincorporated
Cross Streets
Ashbourne Road
Parcel #
APNs: 211-210-017 and 211-210-029
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15301(c)
Reasons for Exemption
The activity/project consists of the repair and reconstruction of an existing
street, drainage system, and associated embankment failure, involving negligible expansion of use beyond that previously existing pursuant to Article 19, Section 15301(c) of the CEQA Guidelines.
County Clerk
Contra Costa
Attachments
Notice of Exemption
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