Garrity Creek Siphon


SCH Number
Public Agency
West County Wastewater District
Document Title
Garrity Creek Siphon
Document Type
NOE - Notice of Exemption
Document Description
A 6-inch High Density Polyethylene (HDPE) pipe and a 10-inch HDPE pipe will be installed using Horizonatal Directional Drilling (HDD) approximately 25 feet below the streambed of Garrity Creek to replace a 12-inch, Ductile Iron Pipe (DIP) that transports domestic wastewater, by gravity, from the east side of Garrity Creek to West County Wastewater District's (WCWD) Tara Hill Pump Station wes of Garrity Creek. The 12-inch DIP was originally constructed below the streambed in 1964 with a concrete cap above the pipe. At high tide and wet weather flows, the water is deep enough that the pipe cannot be seen from the creek bank. Overtime, the streambed has eroded to the point that the 12-inch DIP is now exposed during dry weather/low tide conditions.

Contact Information

Ken Cook
Agency Name
West County Wastewater District
Contact Types
Lead/Public Agency


Contra Costa
Other Location Info
Uninvorporated Contra Costa County

Notice of Exemption

Exempt Status
Statutory Exemption
Type, Section or Code
21080 (b)(2)
Reasons for Exemption
Emergency repairs to Public Services Facilities necessary to maintain service.

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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