Syphon Reservoir Improvement Project (Syphon Dam, 1029-5)
12 Documents in Project
Summary
SCH Number
2019080009
Lead Agency
Irvine Ranch Water District
Document Title
Syphon Reservoir Improvement Project (Syphon Dam, 1029-5)
Document Type
NOD - Notice of Determination
Received
Posted
2/9/2026
Document Description
The proposed work under the supervision of the Department of Water Resources includes the replacement of the existing 59-foot-high Syphon Canyon Dam (State Dam No. 1029-5) with a new 138-foot-high dam, along with the construction of new outlet works and spillway.
Contact Information
Name
Chis Dorsey
Agency Name
CA Department of Water Resources’ Division of Safety of Dams
Job Title
Project Engineer
Contact Types
Responsible Agency
Phone
Name
Fiona Sanchez
Agency Name
Irvine Ranch Water District
Job Title
Director of Water Resources
Contact Types
Lead/Public Agency
Phone
Email
Location
Notice of Determination
Approving Agency
CA Department of Water Resources’ Division of Safety of Dams
Approving Agency Role
Responsible Agency
Approved On
County Clerk
Orange
Final Environmental Document Available at
15600 Sand Canyon Avenue, Irvine, CA 92618
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
Yes
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
No
(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
No
(4) A mitigation reporting or monitoring plan was adopted for this project
No
(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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