Lake llsanjo Dam - Outlet Pipe and Slide Gate Valve Replacement


SCH Number
Public Agency
California Department of Parks and Recreation
Document Title
Lake llsanjo Dam - Outlet Pipe and Slide Gate Valve Replacement
Document Type
NOE - Notice of Exemption
Document Description
Replace the outlet pipe and slide gate valve at the Lake llsanjo Dam in Trione-Annadel State Park to ensure the ability to release water on an as needed basis. Work will: • Over a period of weeks, slowly lower the lake water level 5 to 10 feet; • Replace the existing sliding gate valve on the lake side of the dam with a new valve of the same model; • Install a new 12-inch secondary gate valve on the downstream face of the dam; • Replace and install a new approximately 20-foot long, 12-inch diameter, steel pipe anchored with straps, saddles, stakes, and/or soil; • Replace/install rip-rap at the pipe outlet for use as an energy dissipator; and • Use a liquid urethane coating (or egual) to seal cracks in the gunite surface of the dam face.

Contact Information

Cyndy Shafer
Agency Name
Department of Parks and Recreation
Contact Types
Lead/Public Agency

Agency Name
Bay Area District
Contact Types
Project Applicant


Other Location Info
Trione-Annadel State Park

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Class: 1 & 4 Section: 15301 & 15304
Reasons for Exemption
Project consists of the repair, maintenance and minor alterations of existing public or private structures, facilities, involving negligible or no expansion of use beyond that of current levels and minor public or private alterations in the condition of land which do not involve the removal of healthy, mature, scenic trees.


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