Pacoima Reservoir Restoration Project

Pacoima Reservoir Restoration Project

The Project includes three separate phases. Phase 1 proposes removal of 1.5 MCY of sediment. Construction is anticipated to start in late 2025 with site preparation and vegetation removal, and sediment removal activities are anticipated to start in spring 2026. Phase 1 is planned to be implemented over a period of up to five years. Phase 2 proposes removal of the amount of sediment sufficient to restore 8.0 MCY of storage capacity in the reservoir, currently estimated to be up to 4.0 MCY. Phase 3 of the Project will involve establishing a long-term sediment maintenance program for removing approximately 1.1 MCY of sediment approximately every 10 years to reduce the need for future large-scale projects. The Phase 3 long-term sediment maintenance program is anticipated to begin in Spring of 2041. The proposed Project would restore flood management and water conservation capacity to the reservoir, increase the reliability of operations and safety of Pacoima Dam, and create a long-term and reliable means of access to the reservoir. The following proposed activities would occur annually during the non-storm season (April 16 to October 14): Reservoir Access, Reservoir Dewatering, Sediment Excavation, Sediment Transportation, and Sediment Placement.

Los Angeles

Unincorporated

California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Toxic Substances Control (DTSC), California Highway Patrol (CHP), California Natural Resources Agency, California Regional Water Quality Control Board, Los Angeles Region 4 (RWQCB), California Santa Monica Mountains Conservancy (SMMC), California State Lands Commission (SLC), Office of Historic Preservation, San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy (RMC), State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Division of Water Rights, California Native American Heritage Commission (NAHC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Water Resources (DWR), California Department of Transportation, District 7 (DOT)

California Native American Heritage Commission (NAHC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Water Resources (DWR), California Department of Transportation, District 7 (DOT)

Other (Sediment Removal)

Sediment Removal

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire