Sediment Management

Picture of Pacoima Dam


Extension of Review Period:

LACFCD has received request to extend the comment period of the Notice of Preparation (NOP). In response to this request, LACFCD is granting an extension by tripling the comment period for an additional 30 days from Monday, October 16, 2023 to Wednesday, November 15, 2023. Comments must be postmarked or received no later than Wednesday, November 15, 2023, by 5:00 pm.

  • Written comments can be submitted via mail to:
  • Los Angeles County Public Works
  • Stormwater Engineering Division
  • P.O. Box 1460, Alhambra, California 91802-1460
  • Attn: Sediment Management Section


Upcoming Community Events:

Learn more about the project and meet the project team at upcoming community events!

  • 11:00 a.m. to 5:00 p.m.
  • Maclay St. and 3rd St.
  • San Fernando, CA
  • 9:00 a.m. to 4:00 p.m.
  • Hansen Dam Recreation Area
  • Lakeview Terrace, CA

Scoping Meetings:

Thank you for attending the community scoping meetings to hear an overview of the proposed Pacoima Reservoir Restoration Project (PRRP) and to provide written comments on the Program Environmental Impact Report (PEIR).

The LACFCD, as lead agency under CEQA, has conducted scoping meetings in compliance with Section 15082(c) of the State CEQA Guidelines. The scoping meetings provide an opportunity for responsible agencies, trustee, agencies, and interested organizations and individuals to hear a summary of the proposed PRRP and to provide written comments regarding the scope and content of the environmental information to be included in the PEIR.


Notice of Preparation:

The LACFCD is preparing a Draft Program Environmental Impact Report (PEIR) pursuant to the California Environmental Quality Act (CEQA). A Notice of Preparation (NOP) has been prepared to seek input regarding the scope and content of the environmental information to be included in the Draft PEIR.

A 30-day review period for the NOP began on August 16, 2023, and will end on September 14, 2023. The LACFCD requests the submittal of written comments on the NOP by Thursday, September 14, 2023. Review period extended until Wednesday, November 15, 2023.


The Pacoima Dam is a constant angle concrete arch dam that was constructed in 1929 and is located approximately 3 miles northeast of the City of San Fernando. At the time, it was the tallest arch dam in the United States with a height of 365 feet. The Pacoima Reservoir has an original design capacity of 6,060 acre-feet (approximately 9.78 million cubic yards) and contains a tributary watershed covering 28.2 square miles. Pacoima Dam serves to provide vital flood protection, debris control, and water conservation for the Los Angeles region, including the immediate downstream communities of Sylmar and Pacoima.

Pacoima's watershed has been burned by a series of fires in recent years, including the Marek (2008), Sayre (2008), Station (2009) and Sand (2016) fires. Many of the larger areas within the watershed have been burned multiple times, with approximately 96 percent of the tributary watershed having been burned by at least one fire. The storm events following these fires have considerably increased sediment deposition into the reservoir.

The Los Angeles County Flood Control District (LACFCD) proposes a project to remove sediment from Pacoima Reservoir in order to restore flood control and water conservation capacity to the reservoir, create a long-term, safe, and reliable means of access to the reservoir, and increase the reliability of operations and safety of Pacoima Dam.

Coastal Sage Scrub
Acorn Woodpeckers
Planted Rosa Californica
Oak Woodland



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Updated on: 10/16/2023