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Sediment Management

Devils Gate Dam
On November 12, 2014 the County of Los Angeles Board of Supervisors certified the Final Environmental Impact Report (FEIR) for the Devil's Gate Reservoir Sediment Removal and Management Project. The Board also directed the Los Angeles County Flood Control District to carry out the Recommended Project which is based on the Environmentally Superior Alternative from the FEIR.
A one page summary of the Recommended Project details can be found here.

The Los Angeles County Flood Control District is pleased to announce the release of the Final Environmental Impact Report (Final EIR) for the Devil's Gate Reservoir Sediment Removal and Management Project.
The Final EIR contains responses to comments received on the Draft EIR during the public review period, October 23, 2013 to January 21, 2014. The Final EIR also reflects changes to lessen impacts to air quality, traffic, and biological resources.
The Final EIR can be viewed in its entirety here.
Hardcopies of the Final EIR are currently available for review until December 11, 2014 at the following locations:
  • Pasadena Central Library, 285 East Walnut Street, Pasadena, CA
  • Altadena Library District, 600 East Mariposa Street, Altadena, CA
  • La Cañada Flintridge Library, 4545 North Oakwood Avenue, La Cañada Flintridge, CA
  • County of Los Angeles Department of Public Works, 900 South Fremont Avenue, Alhambra, CA available at the 2nd floor public counter
A description of the Recommended Project is available on the website here.

Three community Informational Meetings were held to present the findings and results of the FEIR. A PDF copy of the presentation from those meetings can be found on our Resources Pages.
A PDF depicting historic sediment levels within the reservoir shown at the meeting in La Cañada Flintridge can also be found on the Resources Page.

Since 2011, the Los Angeles Flood Control District (LACFCD) has implemented interim measures at Devil's Gate Dam and Reservoir which consisted removing sediment from the area immediately in front of the dam and placing it in Johnson Field.
This October, LACFCD removed approximately 600 cubic yards of accumulated sediment and 100 cubic yards of green waste near the face of Devil's Gate Dam. As with previous years, green waste such as tree branches and other vegetative matter that was removed was trucked to the Scholl Canyon Landfill in Glendale and sediment was stockpiled at Johnson Field to be removed when the larger Devil's Gate Sediment Removal and Management Project takes place.
The flyer that was circulated for the 2014 Interim Measures can be found on the Resources Page.
For more information on the EIR or to be added to the project mailing list, please contact
Updated on: 11/13/2014