Noxon Reservoir

Noxon Reservoir
Name	Noxon Reservoir
Location	Lincoln County, Montana, Sanders County, Montana, Montana
Type	Reservoir
Inflow	Clark Fork River
Outflow	Clark Fork River
Basin countries	United States
Area	9,000 acres
Max-depth	464 ft
Elevation	2,300 ft
Created	1959
Dam	Noxon Rapids Dam

Noxon Reservoir is an artificial impoundment on the Clark Fork River in western Montana, formed by the Noxon Rapids Dam and situated near the Idaho border within Lincoln County, Montana and Sanders County, Montana. The reservoir lies within the historical landscapes of the Bitterroot Range, adjacent to the Cabinet Mountains Wilderness, and is part of water resource developments tied to the Columbia River Treaty era of hydroelectric expansion, the legacy of which intersects with the operational histories of utilities such as Avista Corporation, Puget Sound Energy, and Bonneville Power Administration projects. Its creation influenced regional hydrology, land use, and cultural landscapes connected to the Flathead Nation, Coeur d'Alene Tribe, and settler economies centered on logging firms like Weyerhaeuser and rail corridors of the Northern Pacific Railway.

History

The reservoir’s genesis traces to mid-20th-century hydroelectric planning involving the United States Army Corps of Engineers, private utilities including Anaconda Copper, and federal policy debates in the United States Congress, with construction authorized amid competing interests represented in hearings before the House Committee on Interior and Insular Affairs and environmental discussions influenced by early reports from the U.S. Fish and Wildlife Service and the National Park Service. The project’s timeline intersects with broader regional projects such as Hungry Horse Dam and Libby Dam, and its completion in 1959 occurred during policy shifts also evident in legislation like the Federal Power Act and administrative actions by the Federal Energy Regulatory Commission. Local responses involved municipal stakeholders from Troy, Montana and Noxon, Montana as well as tribal petitions lodged with the Bureau of Indian Affairs.

Geography and Hydrology

Situated in the upper Clark Fork River basin, the reservoir occupies a valley shaped by glacial and fluvial processes tied to the Rocky Mountains and the Salish Range, receiving tributary inflows from drainages near the Pack River and runoff from the Cabinet Mountains. Hydrologically it contributes to the downstream network of the Columbia River system, linking to reservoirs such as Lake Pend Oreille and cascade operations coordinated by the Columbia Basin Project and managed flow schedules reported to agencies like the Northwest Power and Conservation Council. Seasonal hydrographs reflect snowmelt from the Selkirk Mountains and precipitation patterns monitored by the National Oceanic and Atmospheric Administration and the US Geological Survey, while bathymetry near the dam shows maximum depths comparable to other regional impoundments like Libby Reservoir.

Construction and Operation

Built by contractors under the sponsorship of utility interests tied to mid-century electrification, the Noxon Rapids Dam project incorporated engineering standards promulgated by entities such as the American Society of Civil Engineers and design inputs influenced by projects at Grand Coulee Dam and Bonneville Dam. Turbine selection, spillway capacity, and reservoir rule curves were determined in concert with Federal Energy Regulatory Commission licensing and coordination with grid operators represented by Northwest Power Pool and regional balancing authorities including Bonneville Power Administration. Ongoing operations require environmental compliance filings under statutes like the Clean Water Act and consultations with the U.S. Fish and Wildlife Service and Montana Fish, Wildlife & Parks concerning water releases and species protections.

Ecology and Environment

The impoundment altered aquatic habitats used by migratory native fish such as bull trout (Salvelinus confluentus) and westslope cutthroat trout, and affected anadromous pathways historically connected to the Columbia River basin, raising concerns akin to those addressed in litigation involving Pacific Northwest salmon restoration. Terrestrial environs adjacent to the reservoir provide habitat for species protected under federal statutes and managed by agencies including the U.S. Forest Service within the Kootenai National Forest and by the Bureau of Land Management. Conservation efforts have involved partnerships among NGOs such as The Nature Conservancy, academic researchers from University of Montana, and federal monitoring programs coordinated with the Environmental Protection Agency and the National Park Service to track water quality, invasive species, and riparian restoration.

Recreation and Access

The reservoir supports recreational activities promoted by Montana Fish, Wildlife & Parks and local chambers of commerce in towns such as Troy, Montana and Heron, Montana, including boating, angling for species like rainbow trout and kokanee salmon, camping at sites administered by the U.S. Forest Service and county parks, and backcountry access toward the Cabinet Mountains Wilderness and trail systems tied to the Pacific Northwest Trail. Transportation access parallels corridors used by the BNSF Railway and state routes such as Montana Highway 56, with visitor services provided by outfitters affiliated with associations like the Outdoor Industry Association.

Cultural and Economic Impact

Economically the reservoir affected regional industries including timber operations connected to firms such as PotlatchDeltic and tourism enterprises, while cultural impacts continue to be negotiated with tribal entities including the Confederated Salish and Kootenai Tribes and the Kootenai Tribe of Idaho over fisheries, cultural resources, and treaty rights administered by the Interior Department. Local economies oriented toward recreation, hydroelectric revenues, and transport have ties to markets influenced by companies like Alcoa historically and current utility purchasers such as PacifiCorp, with planning discussions occurring in venues like county commissions and regional planning bodies including the Northwest Power and Conservation Council. The reservoir remains a focal point in regional dialogues on renewable energy, ecosystem restoration, and heritage preservation involving academic centers such as Montana State University and policy forums facilitated by the Office of Surface Mining Reclamation and Enforcement.

Category:Reservoirs in Montana Category:Hydroelectric power stations in Montana