Devil's Gate Reservoir Sediment Removal and Management Project

9 Documents in Project


SCH Number
Lead Agency
Los Angeles County Flood Control District
Document Title
Devil's Gate Reservoir Sediment Removal and Management Project
Document Type
EIR - Draft EIR

Document Description
Note: Extended Review Per Lead The project, which was approved on Nov 12, 2014, and for which previous approvals remain in place, will remove sediment from Devil's Gate Reservoir to restore capacity and to protect the dam and its valves to reduce the risk of flooding in the communities located downstream. This effort will include removal of approx 2.4 million cy of existing excess sediment in the reservoir in addition to any additional sediment that accumulates during construction. Sediment removal activities are expected to occur over the course of approx 3-5 years beginning summer 2018. Reservoir management is expected to start after 2022. The purpose of the annual reservoir management is to reduce buildup of sediment in the management area and eliminate or substantially reduce the occurrence of another large scale sediment removal project in the future.

Contact Information
Christopher Stone
LA County Flood Control District
PO Box 1460
Alhambra, CA 91802-1460



34°11'09"N 118°10'31"W
Los Angeles
Cross Streets
Oak Grove Drive and Windsor Drive
Total Acres
Parcel #
State Highways
Hwy 210, 2
La Canada HS
Arroyo Seco

Notice of Completion

Review Period Start
Review Period End
Development Type
Other (Flood Control facility)
Local Action
Other Action Other Action: Flood Control
Project Issues
Cumulative Effects Biological Resources Air Quality
Reviewing Agencies
Department of Fish and Wildlife, Region 5 Caltrans, District 7 Department of Water Resources California Department of Parks and Recreation California Highway Patrol Native American Heritage Commission Regional Water Quality Control Board, Region 4 Resources Agency
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