Big Pine Wastewater Treatment Facility Expansion

2 Documents in Project


SCH Number
Lead Agency
Inyo County
Document Title
Big Pine Wastewater Treatment Facility Expansion
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Open Space/Natural Resources
Document Description
The Project consists of expanding the existing Big Pine Wastewater Treatment Facility from 10.3 acres to 15 acres, an increase of approximately 5 acres. The expansion will increase the capability of the wastewater facility by adding an additional new rapid infiltration basin in the expanded 5 acre lease area. The existing wastewater disposal facility has proven insufficient in years when the ground water is elevated in the area. This has occurred in 2017, 2019 and 2023 which were record snow and runoff years. Site soils will be used to create berms to enclose and create the new basin at a high higher elevation than the current existing infiltration/percolation basins located on the existing treatment facility area. This higher elevation of the new rapid infiltration basin will provide the needed separation from the ground water to provide the proper treatment and hydraulic head to allow for infiltration of the treated effluent into the ground water. The additional basin will also allow for continued compliance with the waste discharge requirements of the permit with the State Water Board. In addition to the new rapid infiltration basin there are projected future plans for the installation of a ground mount solar array which will provide needed power to the plant and allow it to have a net zero energy usage allowing ability to keep the rates in the community stable. The solar array will be installed through the future application of a building a building permit.

Contact Information

Danielle Visuano
Agency Name
Inyo County Planning Department
Job Title
Associate Planner
Contact Types
Lead/Public Agency


Big Pine
Cross Streets
State Route 168
Total Acres
Parcel #
State Highways
State Highway 395
Big Pine Unified School

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
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 Transportation, District 7 (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, Lahontan Victorville Region 6 (RWQCB), State Water Resources Control Board, State Water Resources Control Board, Divison of Financial Assistance
Development Types
Waste Treatment:Sewer (MGD .0437)
Local Actions
Use Permit
Project Issues
Air Quality, Biological Resources
Local Review Period Start
Local Review Period End


Notice of Completion [NOC] Transmittal form

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