Patterson Dam Valve Exercise


SCH Number
Public Agency
California Department of Water Resources (DWR)
Document Title
Patterson Dam Valve Exercise
Document Type
NOE - Notice of Exemption
Document Description
The Division of Safety of Dams (DSOD) requires that valves associated with low-level outlet works be exercised on an annual basis to verify the ability to dewater the reservoir. The Patterson Dam downstream 12-inch BFV shall be exercised by fully opening and closing. The total volume of water between the U/S and D/S valves that will need to be pumped during the valve exercise is estimated as 118 cubic feet. Prior to the proposed valve exercise, DFD staff shall collect a sample of the water contained within the conduit to be dewatered and the sample result shall be approved before the exercise beings. The entire project is within DFD right of way.

Contact Information

Anthony Chu
Agency Name
California Department of Water Resources
Contact Types
Lead/Public Agency



Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
S:15301, Class 1
Reasons for Exemption
Existing Facilities.

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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