Devil's Gate Reservoir Annual Cleanout '24 & '25


SCH Number
Lead Agency
Los Angeles County Department of Public Works (DPW)
Document Title
Devil's Gate Reservoir Annual Cleanout '24 & '25
Document Type
NOD - Notice of Determination
Document Description
The Devil's Gate Reservoir Annual Cleanout ’24 and ’25 Project was approved by the Board of Supervisors on February 27, 2024, to remove approximately 250,000 cubic yards of sediment, perform slope stability work at the reservoir embankments, perform vegetation management; grade the invert of the reservoir; construct an entrainment (low flow) channel, and perform other various maintenance improvements at the Devil’s Gate Reservoir. The Board also found the project and related recommended actions are within the scope of the Final Environmental Impact Report, certified by the Board on November 12, 2014, together with the Recirculated Portions of the Final Environmental Impact Report, certified on November 7, 2017, for the Devil's Gate Reservoir Sediment Removal and Management Project; found that the impacts of the project previously analyzed in the Final Environmental Impact Report previously adopted by the Board comply with the California Environmental Quality Act; found that the previously adopted Mitigation Monitoring and Reporting Program continues to be adequately designed to ensure compliance with the mitigation measures during project implementation; found that the previous Environmental Findings and Statements of Overriding Considerations, which findings and statements are adopted and incorporated by reference, continue to apply to the project; and found on the basis of the whole record for the Board that no changes are proposed in the project or substantial changes have occurred with respect to the circumstances under which the project is being undertaken.

Contact Information

George De La O
Agency Name
Los Angeles County Public Works
Job Title
Senior Civil Engineer
Contact Types
Lead/Public Agency


Los Angeles
Southern California
Cross Streets
Oak Grove Drive and Windsor Avenue
Total Acres
Parcel #
State Highways
I-210, SR-2
La Canada High School, Hillside School and Learning Center
Arroyo Seco

Notice of Determination

Approving Agency
Los Angeles County Flood Control District
Approving Agency Role
Lead Agency
Approved On
County Clerk
Los Angeles
Final Environmental Document Available at


(1) The project will have a significant impact on the environment
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
Yes (Recirculated Portions of FEIR)
(3) Mitigated measures were made a condition of the approval of the project
(4) A mitigation reporting or monitoring plan was adopted for this project
(5) A Statement of Overriding Considerations was adopted for this project
(6) Findings were made pursuant to the provisions of CEQA


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