Minor Alteration No. WA2023201 – Yolo Bypass Shag Slough Geotechnical Investigations
Summary
SCH Number
2026010370
Public Agency
Central Valley Flood Protection Board
Document Title
Minor Alteration No. WA2023201 – Yolo Bypass Shag Slough Geotechnical Investigations
Document Type
NOE - Notice of Exemption
Received
Posted
1/14/2026
Document Description
Reclamation District 2068 is proposing to conduct a total of maximum 25 geotechnical
explorations to a maximum depth of 60 feet that will involve drilling borings and pushing Cone Penetration Tests (CPTs) through the levee crown to evaluate stability and seepage at three locations along Shag Slough. The proposed explorations will occur between Levee Mile (LM) 3.2 and LM 5.5, spaced approximately 500 feet apart.
The geotechnical investigation will collect material properties and soil samples for laboratory analysis. The investigations will adhere to federal, state, and local engineering and environmental conditions and other criteria, per the United States Army Corps of Engineers (USACE) standards, and Office of Safety and Occupational Health standards.
Contact Information
Name
Angela Nguyen-Tan
Agency Name
Central Valley Flood Protection Board
Job Title
Senior Environmental Scientist
Contact Types
Lead/Public Agency
Phone
Name
Michael Moncrief
Agency Name
Reclamation District 2068
Job Title
District Engineer
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project
Address
Phone
Location
Coordinates
Cities
Dixon
Counties
Solano
Regions
Northern California
Waterways
Shag Slough
Township
6N
Range
2E
Other Location Info
The borings will located between Shag Slough Levee Mile (LM) 3.2 and LM 5.5, spaced approximately 500 feet apart, in Solano County.
Other Information
Sections 13, 24 and 25
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Class 6, CEQA CCR, Title 14, Section 15306
Reasons for Exemption
The Board has determined that the project is exempt from CEQA under the Class 6, Information Collection categorical exemption (CEQA California Code of Regulations, Title 14, Section 15306), because the activity consists of basic data collection, research, experimental management, and resource evaluation activities which do
not result in a serious or major disturbance to an environmental resource. These may be strictly for information gathering purposes, or as part of a study leading to an action which a public agency has not yet approved, adopted, or funded. Further, none of the exceptions to the exemption in CEQA California Code of Regulations, Title 14, Section 15300.2 apply.
County Clerk
Solano
Attachments
Notice of Exemption
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