Site Access Agreement to Cotati Tanks Water Storage Facility for USGS Seismic Monitoring


SCH Number
Public Agency
Sonoma County Water Agency
Document Title
Site Access Agreement to Cotati Tanks Water Storage Facility for USGS Seismic Monitoring
Document Type
NOE - Notice of Exemption
Document Description
The project is a site access agreement with the U.S. Geological Survey (USGS) to install and operate a seismic monitoring station at Sonoma County Water Agency’s Cotati Tanks Water Storage Facility. USGS is conducting research necessary to characterize and identify earthquake hazards, assess earthquake risks, monitor seismic activity, and develop and implement earthquake early warnings. The monitoring station consists of instruments placed on two, two-foot by three-foot concrete pads approximately 25 feet apart and connected with a buried electrical conduit. One pad site would support a solar panel and telemetry equipment and the other pad would contain a seisometer and associated equipment. Ground disturbance would be limited to the concrete pads and trenching for the connecting conduit.

Contact Information

David G Cook
Agency Name
Sonoma County Water Agency
Job Title
Senior Environmental Specialist
Contact Types
Lead/Public Agency


Unincorporated area
Cross Streets
1190 West Sierra Avenue, near Cotati

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
CEQA Guidelines §15304, Minor Alterations to Land; and §15306, Information Collection
Reasons for Exemption
The project is exempt because the installation of data collection equipment would require only minor ground disturbance and would result in minor alterations to land which do not involve removal of healthy, mature, scenic trees, and research data collection, which does not result in a serious or major disturbance to an environmental resource.
County Clerk


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