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Department of Public Works
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Sediment Management

Cogswell Dam
Location Angeles National Forest along the west fork of the San Gabriel River and off of Devil's Canyon Dam Truck Trail. (Thomas Guide Page 508, A5)
Fire Event(s)* 2009 Station Fire
Watershed Burned 90%
Amount of Sediment to be Removed Up to 2.6 MCY
Removal Method Mechanical Excavation
Disposal Location Cogswell Sediment Placement Site (adjacent to site)
Required Permits U.S. Army Corps of Engineers
California Dept. of Fish and Wildlife
Regional Water Quality Control Board
U.S. Forest Service
Environmental Documents Addendum to 1993 EIR. Project is Phase 2B
Community Meeting Dates None currently scheduled
*Heavy sedimentation is expected for the five years following the fire event. With 7-10 years expected for full recovery under current drought conditions.
For more information on this project please contact:
Updated on: 07/24/2017
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