Installation of an Earthquake Detection System at O'Neill Forebay


SCH Number
Lead Agency
Water Resources, Department of (California Department of Water Resources)
Document Title
Installation of an Earthquake Detection System at O'Neill Forebay
Document Type
NOE - Notice of Exemption

Document Description
The United States Bureau of Reclamation will direct DWr to excavate and install earthquake detection equipment in the O'Neill FOrebay Dam area, these sites are labaled Crest, Toe, Free Field. To install the equipment, areas about 5 feet by 4 feet by 2.3 feet will be excavated at the three sites and motion vaults will be placed in the excavated areas. The Crest and Toe will require 20-foot abutment on the left and right sides. A 3.5-foot deep hole will be drilled at the three sites and a 9-foot tall, 4-inch diameter steel cap pole will be placed in the holes. A 2.5-foot deep hole will be drilled at the Crest and Toe areas and a 6-foot tall, 6-inch diameter domed bollard will be placed in each hole. The cap pole and bollard will be painted. San Luis Canal water users will benefit.

Contact Information

California Department of Water Resources
31770 Gonzaga Rd
Gustine, CA 95322

Phone : (916) 651-9642


Other Information
1.6 southwest of the City of Santa Nella

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
S: 15306
Reasons for Exemption
Work involves installing motion sensing vaults for earthquake detection at O'Neill Forebay. There will not be any serious or major disturbance to environmental resources.

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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