Flume 48 Utility and Infrastructure Replacement Project

Flume 48 Utility and Infrastructure Replacement Project

The District owns and operates the El Dorado Hydroelectric Project, which is licensed by the Federal Energy Regulatory Commission (FERC) as Project 184. Project 184 includes various conveyance structures (e.g., flumes, canals, tunnels, siphons) to convey approximately 1/3 of the District’s total drinking water supply to over 125,000 residents in El Dorado County, California, and also provides clean renewable energy through a 21-megawatt hydroelectric generation facility. Flume 48 is a component of this critical water conveyance system. The Project would replace approximately 448 linear feet of an existing wooden flume (i.e., Flume 48), which is highly susceptible to damage from wildfire and other natural hazards, with a more durable ignition resistant concrete conveyance structure (i.e., U-shaped concrete canal). The Project requires the removal and replacement of approximately 448 linear feet of wooden flume, spillway, wooden substructure, and a historic hand-stacked rock wall. Construction of a new water conveyance structure that involves construction of a rock wall with a cast-in-place reinforced concrete U-shaped canal built on a Mechanically Stabilized Earth bench. Construction of the Project is scheduled to occur during the District’s annual canal maintenance outage, which typically occurs annually from October through December. The Project would be completed over the course of two annual outages, with construction being suspended during the regular operational period of the canal (mid-December through September).

Unincorporated area of Pollock Pines

El Dorado

Countywide, Unincorporated

California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, North Central Region 2 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Toxic Substances Control (DTSC), California Department of Transportation, District 3 (DOT), California Department of Water Resources (DWR), California Energy Commission, California Fish and Game Commission (CDFGC), California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB), California State Lands Commission (SLC), Central Valley Flood Protection Board, Delta Protection Commission, Delta Stewardship Council, Office of Historic Preservation, Sierra Nevada Conservancy, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Drinking Water, District 9, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance

Water Facilities (Flume Replacement - No change in capacity)(Type Water Facilities, MGD 0.000001)

Water Conveyance

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