Kawana-Ralphine Pipeline Geotechnical Investigation
Summary
SCH Number
2025060109
Public Agency
Sonoma County Water Agency
Document Title
Kawana-Ralphine Pipeline Geotechnical Investigation
Document Type
NOE - Notice of Exemption
Received
Posted
6/4/2025
Document Description
The Sonoma County Water Agency plans to relocate the Kawana-Ralphine pipeline, which currently connects the Ralphine Water Tanks to the Sonoma Booster Station. This pipeline extends beneath a portion of Spring Lake and the Spring Lake dam, presenting maintenance challenges and potential seismic vulnerabilities. To assess the pipeline’s vulnerability to seismic events, a geotechnical investigation is needed. This will help determine how the pipeline may be affected by seismic activity and inform the design and relocation of the pipeline to ensure its safety, reliability, and resilience. The beneficiaries of the geotechnical investigation include the Sonoma County Water Agency, which gains crucial data to inform safe and reliable pipeline relocation and design; local communities, who benefit from improved water system safety and reliability; and engineers and designers, who receive detailed geotechnical data to guide accurate and safe designs.
Contact Information
Name
Yvette O'Keefe
Agency Name
Sonoma County Water Agency
Job Title
Senior Environmental Specialist
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project
Phone
Email
Location
Counties
Sonoma
Regions
Citywide
Other Location Info
The project site is located along Sonoma County Water Agency’s (Sonoma Water) existing Kawana-Ralphine pipeline which connects the Ralphine Water Tanks to the Sonoma Booster Station. The pipeline is located within Sonoma County Spring Lake Regional Park and ends at Sonoma Water’s Booster Pump Station facility located at 5204 Montgomery Drive, in Santa Rosa, Sonoma County, California.
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Section15306: Information Collection
Reasons for Exemption
The geotechnical investigation will consist of data collection and research which will not result in a serious or major disturbance to an environmental resource.
County Clerk
Sonoma
Attachments
Notice of Exemption
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