El Dorado Hills Water Treatment Plant Improvements Project Initial Study/Addendum to Program Environmental IMpact Report

El Dorado Hills Water Treatment Plant Improvements Project Initial Study/Addendum to Program Environmental IMpact Report

The Project would modernize and expand the existing El Dorado Hills Water Treatment Plant (EDHWTP) to replace aging infrastructure, enhance treatment reliability and resilience, address seasonal source-water challenges from Folsom Lake, and ensure the facility can continue meeting current and future drinking water regulations and demands through upgraded treatment processes and increased operational capacity. The Project would increase authorized capacity from 19.5 million gallons per day (mgd) to 24 mgd, with infrastructure to accommodate a future buildout capacity of up to 31.5 mgd. The Project involves removal of outdated infrastructure and installation of new water treatment facilities, piping, electrical systems, and other associated infrastructure. Project construction will require the use of heavy machinery including dump trucks, cranes, backhoes, concrete trucks, pump trucks, welding equipment, loaders, generators, forklifts, and air compressors. Construction will be phased to allow uninterrupted operation of the existing EDHWTP. Construction would occur intermittently over a five-year period, with the exact commencement date depending upon the availability of grants or other financing.

Placerville, Unincorporated area of El Dorado Hills

El Dorado

Northern California, 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 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, Lahontan South Lake Tahoe Region 6 (RWQCB), California State Lands Commission (SLC), Office of Historic Preservation, Sierra Nevada Conservancy, 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, State Water Resources Control Board, Divison of Financial Assistance

Water Facilities (Addendum)(Type Water Treatment, MGD 19.5)

Addendum

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, 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, Schools/Universities, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire