Infiltration Gallery Demonstration Project
2 Documents in Project
Summary
SCH Number
2025040994
Lead Agency
South Valley Water Resources Authority
(SVWRA)
Document Title
Infiltration Gallery Demonstration Project
Document Type
NOD - Notice of Determination
Received
Posted
5/30/2025
Document Description
The Infiltration Gallery Demonstration Project (Proposed Project) would evaluate the biological and engineering performance of an alternative method to diverting water in an estuarine system such as the Delta that is less harmful to fishery resources. Water diverted through the infiltration gallery will flow by gravity into a vault (a tank or sump). That is, there will be no suction on the perforated pipes. Hydraulic theory indicate that in this kind of system, flow into and through the pipes, will be controlled by the hydraulic head over the pipes so that if the pipes are at a uniform elevation, flow into the pipes will be uniformly distributed. Water will be pumped from the collection facility through a pipe and discharged re-routed into either a nearby wetland or directly back into Italian Slough directly or through the adjacent wetland. No water consumption would occur as a result of the Proposed Project. At completion of the pilot testing, all equipment and infrastructure will be removed from the Project Site and the site revegetated and returned to agricultural grazing land.
Contact Information
Name
Scott Hamilton
Agency Name
South Valley Water Resources Authority
Job Title
President
Contact Types
Lead/Public Agency
Phone
Location
Coordinates
Cities
Byron, unincorporated area
Counties
Contra Costa
Regions
Unincorporated
Cross Streets
Byron Highway and Clifton Court Road
Zip
93706
Total Acres
13.7
Parcel #
002-230-002-4
Railways
Union Pacific Tracy Subdivision
Airports
Byron Airport
Waterways
Italian Slough, Clifton Court Forebay, Old River, Delta Mendota Canal
Notice of Determination
Approving Agency
South Valley Water Resources Authority (SVWRA)
Approving Agency Role
Lead Agency
Approved On
County Clerk
Contra Costa
Final Environmental Document Available at
https://bit.ly/igdp2025
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
Attachments
Notice of Determination
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