Idyllwild Wastewater Treatment Plant Improvement Project

Idyllwild Wastewater Treatment Plant Improvement Project

The purpose of the project is to modernize the Idyllwild WWTP to meet existing and future discharge requirements efficiently and consistently for the Idyllwild community. The project is needed because the existing WWTP is old and beyond its useful life and needs to be upgraded to meet current wastewater standards and processes. The most urgent issue the WWTP faces is the aging infrastructure, lack of redundancy, and declining treatment efficiency at the existing WWTP. Lack of redundancy makes regular maintenance activities difficult to perform and limited to those that can occur within a 24-hour period. Although the flow can be diverted to the existing EQ (equalizing) basin for a brief period for minor repairs, capital maintenance and longer repairs cannot currently be accomplished. Furthermore, adequate removal of biological oxygen demand (BOD), total suspended solids (TSS), and nitrogen is occasionally not being achieved with the existing biological treatment system. Variations in BOD and TSS loading, as well as wet weather events, overload the single treatment unit, resulting in violations of permit regulations.

Idyllwild

Riverside

Southern California

California Air Resources Board (ARB), California Department of Fish and Wildlife, Inland Deserts Region 6 (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 8 (DOT), California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB), Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance

Waste Treatment:Other (Wastewater Treatment Facility Improvement)(MGD 0.25)

Site Plan

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Energy, 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, Septic System, Sewer Capacity, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire