Alturas Wastewater Treatment Plant Improvement Project

Alturas Wastewater Treatment Plant Improvement Project

The City has had difficulty meeting permitted effluent limits for various constituents, including zinc, copper, aluminum, biological oxygen demand, total suspended solids, total coliform, toxicity, and total suspended solids. Therefore, the City is proposing improvements to WWTP to enhance system efficiency and comply with Central Valley Regional Water Quality Control Board (CVRWQCB) requirements. The City proposes to decommission the existing WWTP; pump the raw wastewater to new, offsite aeration ponds; and dispose of the treated wastewater through land discharge via evaporation and percolation ponds on a portion of Assessor’s Parcel Number (APN) 022-130-042, which is located on the northwest side of County Road 54, approximately 1.4-miles southwest of the City’s existing WWTP. A new pipeline would be constructed along County Road 54 from the existing WWTP to the new location. From the headworks, the raw wastewater will be pumped via a force main that will be constructed using horizontal directional drilling (HDD). The force main will pass under the Pit River to County Road 54 and continue within the road right-of-way to the treatment ponds on APN 022-130-042. All construction would occur within the existing County Road 54 right-of-way. No in-water work would be required.

Alturas

Modoc

Citywide

California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Parks and Recreation, California Department of Toxic Substances Control (DTSC), California Department of Transportation, District 2 (DOT), California Department of Transportation, Division of Aeronautics (DOT), California Department of Transportation, Division of Transportation Planning (DOT), California Department of Water Resources (DWR), California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, Central Valley Redding Region 5 (RWQCB), California State Lands Commission (SLC), Office of Historic Preservation, 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, Central Valley Flood Protection Board, California Department of Fish and Wildlife, Northern and Eureka Region 1 (CDFW)

Central Valley Flood Protection Board, California Department of Fish and Wildlife, Northern and Eureka Region 1 (CDFW)

Water Facilities (Improvements to Existing WWTP)(Type Water, MGD 1.5)

Site Plan, Annexation, Waste Water Treatment Plan Improvements

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, Schools/Universities, Septic System, Sewer Capacity, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire