FCZ 3B Grayson Creek Bank Erosion Repair
Summary
SCH Number
2025101028
Public Agency
Contra Costa County
Document Title
FCZ 3B Grayson Creek Bank Erosion Repair
Document Type
NOE - Notice of Exemption
Received
Posted
10/22/2025
Document Description
The purpose of this project is to restore a
gravel maintenance road and creek channel bank that eroded as a result of the road being over-topped by
surface flow during a storm event. The erosion is approximately 19 feet long, 9 feet wide and 4 feet deep. This
erosion has narrowed the usable width of the existing maintenance road and prevents County Maintenance staff
from accessing a section of Grayson Creek. The repair will consist of cutting an approximately 6-foot-deep key
into the channel bank and placing rock slope protection (RSP) and engineered fill to protect against erosion,
which will be compacted up the slope. Topsoil will be placed over the engineered fill and hydroseeded with a
native seed mix. The bank repair will extend approximately 35 feet long to conform to the adjacent channel
slopes. Temporary dewatering of the creek may be necessary during construction. The maintenance road along
the top of the channel bank will be restored to pre-existing condition. To lessen the impact of concentrated storm
surface flow coming from the neighboring property and prevent further erosion, a drainage inlet and 18-inch
diameter pipe will be installed. Real Estate transactions, utility relocations, temporary traffic control, and
vegetation trimming and removal may be necessary in support of the project. Construction is anticipated to occur
in 2026 or 2027. Work will take place during the dry season and will take approximately 3 weeks to complete.
Appropriate best management practices for erosion control and water pollution control will be implemented to
protect the creek. Applicable regulatory permits will be obtained before construction.
Contact Information
Name
Syd Sotoodeh
Agency Name
Contra Costa County Department of Conservation and Development
Job Title
Senior Planner
Contact Types
Lead/Public Agency
Address
Phone
Name
Alex Natkemper
Agency Name
Contra Costa County Public Works
Job Title
Project Manager
Contact Types
Lead/Public Agency / Parties Undertaking Project
Phone
Location
Cities
Pleasant Hill
Counties
Contra Costa
Regions
Northern California, San Francisco Bay Area
Cross Streets
Golfclub Road
Zip
94523
Parcel #
153-040-009
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15301([d])
Reasons for Exemption
The project consists of repairing damaged portions of an existing flood control
facility to meet current standards of public health and safety involving no expansion of existing use pursuant to
Article 19, Section 15301 of the CEQA Guidelines.
County Clerk
Contra Costa
Attachments
Notice of Exemption
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