Coeur d'Alene River

Coeur d'Alene River
Name	Coeur d'Alene River
Subdivision type1	Country
Subdivision name1	United States
Subdivision type2	State
Subdivision name2	Idaho
Subdivision type3	County
Subdivision name3	Kootenai County; Shoshone County
Length	50 mi (approx.)
Discharge1 location	near Cataldo
Discharge1 avg	variable
Source1	Silver Valley headwaters
Source1 location	Shoshone County, Idaho
Mouth	Lake Coeur d'Alene
Mouth location	Kootenai County, Idaho

Coeur d'Alene River

The Coeur d'Alene River is a tributary in northern Idaho that drains the Silver Valley and flows into Lake Coeur d'Alene, forming part of the larger Spokane River–Columbia River basin. The river's watershed has been shaped by mining activities linked to the Bunker Hill Mining Company, timber operations associated with the United States Forest Service, and transportation corridors such as the Union Pacific Railroad and Interstate 90. The river and its valley intersect with communities including Coeur d'Alene, Idaho, Cataldo, Idaho, Mullan, Idaho, and Wallace, Idaho and are central to regional conservation, legal, and land-management issues involving agencies such as the Environmental Protection Agency and entities like the Kootenai Tribe of Idaho.

Course and Geography

The river originates in the Silver Valley near Mullan, Idaho and flows northwest past Osburn, Idaho, Kellogg, Idaho, and Wallace, Idaho before entering Lake Coeur d'Alene near Cataldo, Idaho. Along its course it is joined by tributaries such as South Fork Coeur d'Alene River and North Fork Coeur d'Alene River (note: avoid direct naming conflicts) and drains portions of the Bitterroot Range, the Coeur d'Alene Mountains, and foothills adjacent to the Idaho Panhandle National Forests. The river valley is paralleled by historic corridors including the Burlington Northern Railroad lines and modern U.S. Route 95 connections that link to the Spokane–Coeur d'Alene metropolitan area and the Interstate Highway System.

Hydrology and Watershed

The watershed feeds into the Spokane River system, ultimately contributing to the Columbia River Basin. Precipitation, snowmelt from the Rocky Mountains (U.S.) and seasonal runoff regulate flow regimes monitored by agencies such as the United States Geological Survey and the National Oceanic and Atmospheric Administration. Land uses including mining operations historically operated by companies like Hecla Mining and Asarco Incorporated altered sediment loads, and federal designations related to the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) affect water-quality management. Water-resource planning involves stakeholders including the Idaho Department of Environmental Quality, the U.S. Army Corps of Engineers, and regional conservation groups such as The Nature Conservancy.

Ecology and Wildlife

Riparian zones along the river support habitats for species associated with the Inland Northwest including populations of cutthroat trout and bull trout managed under plans by the U.S. Fish and Wildlife Service. Aquatic invertebrate communities, waterfowl species tied to Lake Coeur d'Alene, and mammals such as elk and black bear utilize valley ecosystems influenced by forest management from the Bureau of Land Management and the Idaho Department of Fish and Game. Vegetation communities include Ponderosa pine stands and mixed-conifer forests that provide habitat connectivity with regional protected areas like the Saint Joe National Forest and wildlife corridors considered in planning by the World Wildlife Fund and regional land trusts.

History and Human Use

Indigenous inhabitants, notably the Coeur d'Alene Tribe, historically used the river corridor for fishing, trade, and cultural practices prior to Euro-American settlement linked to the Fur Trade era and exploration by figures associated with the Lewis and Clark Expedition and later prospectors arriving during the Idaho Silver Rush. Mining booms led to establishment of towns such as Wallace, Idaho and enterprises including the Bunker Hill Mine and Smelting Complex, with transportation advances like the Northern Pacific Railway and later Great Northern Railway to move ore. Federal policies and legal actions involving the Department of the Interior and federal courts shaped land tenure, water rights, and tribal treaty considerations.

Pollution, Remediation, and Management

Decades of lead, zinc, and cadmium mining resulted in contamination documented by the Environmental Protection Agency, which designated portions of the watershed as a Superfund site. Cleanup and remediation efforts have involved the Bunker Hill Superfund Site response, litigation with corporations such as ASARCO LLC, and restoration projects coordinated with the Coeur d'Alene Tribe, the Idaho Department of Environmental Quality, and federal entities including the U.S. Environmental Protection Agency. Management strategies incorporate sediment removal, capping, revegetation, and long-term monitoring by the United States Geological Survey and National Park Service technical guidance, while regional advocacy by organizations like the Sierra Club and legal actions in federal courts have influenced settlement agreements and long-term stewardship.

Recreation and Facilities

The river and adjacent Lake Coeur d'Alene support recreational activities promoted by local governments such as Kootenai County and municipal parks in Coeur d'Alene, Idaho and facilities including the Coeur d'Alene Resort marina, boat launches at Harrison, Idaho, and trails connected to the North Country National Scenic Trail and regional rail-trails. Angling, boating, birdwatching, and hiking draw visitors from the Spokane–Coeur d'Alene metropolitan area and broader Pacific Northwest, with services provided by outfitters linked to the Idaho Travel Council and conservation education programs from institutions like University of Idaho Extension and the Idaho Conservation League.

Category:Rivers of Idaho