Pond 3 Emergency Repair and Breach, Napa-Sonoma Marshes Wildlife Area
Summary
SCH Number
2002108105
Public Agency
Regional Water Quality Control Board, Region 2 (San Francisco Bay), Oakland
Document Title
Pond 3 Emergency Repair and Breach, Napa-Sonoma Marshes Wildlife Area
Document Type
NOE - Notice of Exemption
Received
Posted
10/7/2002
Document Description
In response to discovering an intentional breach in the levee between Pond 3 and South Slough dug by unknown individuals, DFG proposes actions that will protect an existing water control structure (siphon) and relieve hydraulic pressure on the breach by opening another breach to Pond 3. The primary purpose of the emergency project is to protect the siphon structure adjacent to the breach by placing and driving sheetpiles throught the existing Pond 3 levee. In order to relieve some of the hydraulic pressure on the breach near the sipon, a second (and possible third) breach near the junction of the Napa River and Dutchman Slough (and on South Slough) will also be created. The siphon is the main conduit of water between Ponds 2 and 4 and is extremely important in the day-to day operations of the water delivery system and ultimately future salt pond restoration efforts.
Contact Information
Name
Tobi Tyler
Agency Name
Regional Water Quality Control Board, Region 2 (San Francisco Ba
Contact Types
Lead/Public Agency
Phone
Location
Counties
Napa
Notice of Exemption
Exempt Status
Emergency Project
Type, Section or Code
15269(c)
Reasons for Exemption
Theh RWQCB, San Francisco Bay Region finds that this project, as permitted, will not have a significant effect on the environment and is necessary to mitigate the emergency situation that occurred with the intentional breach by unknown individuals. Therefore, the RWQCB, San Francisco Bay Region finds that this project is exempt from the provision of the California Environmental Quality Act (CEQA) pursuant to Section 15269 (c)
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