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 exercized on an annual basis to verify the ability to dewater the reservoir. The Patterson Dam downstream 12-inch butterfly valve shall be exercised by fully opening and closing. The total volume of water between the U/S and D/S valves is estimated at 880 gallons. The cyclin of both valves and dewatering shall be done in a controlled manner to avoid a sudden release of water into the drainage ditch. The entire project iw within DFD right of way.

Contact Information

Jerry Snow
Agency Name
California Department of Water Resources
Contact Types
Lead/Public Agency



Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
15301(b), Class 1
Reasons for Exemption
Routine maintenance activities.

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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