Lake Koocanusa | |
---|---|
Location | Montana / British Columbia |
Coordinates | 48°55′N115°11′W / 48.92°N 115.18°W |
Lake type | reservoir |
Primary inflows | Kootenay River (Canada) |
Primary outflows | Kootenai River (USA) |
Basin countries | United States, Canada |
Surface elevation | 2,459 feet (750 m) |
Lake Koocanusa (KUU-KAN-USA) is a reservoir in British Columbia (Canada) and Montana (United States) formed by the damming of the Kootenai River by the Libby Dam in 1972. The Dam was formally dedicated by President Gerald Ford on August 24, 1975. [1]
The lake is formed north of the dam, reaching 48 miles (77 km) to the Canada–United States border and 42 miles (68 km) further into British Columbia. The lake holds 13% of the water in the Columbia River system. The town of Rexford was moved, as well as the Great Northern Railway line. The town of Waldo, British Columbia is now covered by the lake. What was once a barrier to river travel, Jennings Canyon is now inundated by the lake. [2] The Elk River joins the Kootenay River in the northern part of Lake Koocanusa, within Canadian territory.
Lake Koocanusa was named in a contest won by Alice Beers of Rexford, Montana. [1] The name is a portmanteau of Kootenai River, Canada, and USA.
Lake Koocanusa was built as a joint project of the U.S. and Canada. It is 26 km (16 mi) from Libby, Montana, also on the Kootenai River, from which the dam gets its name. Libby Dam has a Visitors Center and can be accessed by the Lake Koocanusa Scenic Byway which begins in the nearby town of Libby, Montana.
The Pacific Northwest National Scenic Trail follows Highway 37 along the east side of the lake before crossing over the Lake Koocanusa Bridge and climbing up Webb Mountain.
According to a March 8, 2021 article in The Narwhal , concerns have been raised about selenium pollution leaching from Teck Resources' Elk Valley open pit coal mines' waste rock, which is upstream from the lake system. [3] A September 24, 2020 Montana Department of Environmental Quality presentation to the Board of Environmental Review Meeting, reported that the 95% of the selenium coming into Lake Koocanusa originates from the Elk River—"which has been contaminated by current and historic coal mining in the Elk Valley." The average selenium levels in Lake Koocanusa were 1 part per billion. Montana has established new standards for selenium—0.8 parts per billion. [3] [4] Because of the high bioaccumulation of selenium in fish, excessive levels of selenium in an aquatic ecosystem has implications for human health. [5] [6] In the spring of 2020, Teck Resources, had "reported a dramatic decline in adult westslope cutthroat trout in Elk Valley waterways closest to its mines". [3] Since 2015, British Columbia and Montana have agreed to adopt aligned standards for selenium levels by 2020. [7] Montana's has been in force since the fall of 2020, but British Columbia has not aligned their standards yet. [7]
The lake supports a wide variety of fish species. Below is a table detailing the various fish species which may be encountered on the lake. [8]
Species | Family | Native to MT |
---|---|---|
Brook Trout | Trout | Introduced |
Bull Trout | Trout | Native |
Burbot | Codfish | Native |
Kokanee | Trout | Introduced |
Largemouth Bass | Sunfish | Introduced |
Largescale Sucker | Sucker | Native |
Longnose Dace | Minnow | Native |
Longnose Sucker | Sucker | Native |
Mountain Whitefish | Trout | Native |
Northern Pike | Pike | Introduced |
Northern Pike Minnow | Minnow | Native |
Peamouth | Minnow | Native |
Pumpkinseed | Sunfish | Introduced |
Rainbow Trout | Trout | Introduced |
Redside Shiner | Minnow | Native |
Westslope Cutthroat Trout | Trout | Native |
Yellow Perch | Perch | Introduced |
Lincoln County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 19,677. Its county seat is Libby. The county was founded in 1909 and named for President Abraham Lincoln. The county lies on Montana's north border and thus shares the US-Canadian border with the Canadian province of British Columbia.
Rexford is a town in Lincoln County, Montana, United States. The population was 78 at the 2020 census.
Troy is a city in Lincoln County, Montana, United States. The population was 797 at the 2020 census. It lies at the lowest elevation of any settlement in Montana. The town is on U.S. Route 2, near Montana Highway 56, in the Kootenai River gorge by the Kootenai National Forest.
The Elk River is a 220-kilometre (140 mi) long river, in the southeastern Kootenay district of the Canadian province of British Columbia. Its drainage basin is 4,450 square kilometres (1,720 sq mi) in area. Its mean discharge is approximately 60 cubic metres per second (2,100 cu ft/s), with a maximum recorded discharge of 818 cubic metres per second (28,900 cu ft/s). It is a tributary of the Kootenay River, and falls within the basin of the Columbia River.
The Kootenay River or Kootenai River is a major river of the Northwest Plateau in southeastern British Columbia, Canada, and northern Montana and Idaho in the United States. It is one of the uppermost major tributaries of the Columbia River, the largest North American river that empties into the Pacific Ocean. The Kootenay River runs 781 kilometres (485 mi) from its headwaters in the Kootenay Ranges of the Canadian Rockies, flowing from British Columbia's East Kootenay region into northwestern Montana, then west into the northernmost Idaho Panhandle and returning to British Columbia in the West Kootenay region, where it joins the Columbia at Castlegar.
Kootenay Lake is a lake located in British Columbia, Canada. It is part of the Kootenay River. The lake has been raised by the Corra Linn Dam and has a dike system at the southern end, which, along with industry in the 1950s–70s, has changed the ecosystem in and around the water. The Kootenay Lake ferry is a year-round toll-free ferry that crosses between Kootenay Bay and Balfour. The lake is a popular summer tourist destination.
The Flathead River, in the northwestern part of the U.S. state of Montana, originates in the Canadian Rockies to the north of Glacier National Park and flows southwest into Flathead Lake, then after a journey of 158 miles (254 km), empties into the Clark Fork. The river is part of the Columbia River drainage basin, as the Clark Fork is a tributary of the Pend Oreille River, a Columbia River tributary. With a drainage basin extending over 8,795 square miles (22,780 km2) and an average discharge of 11,380 cubic feet per second (322 m3/s), the Flathead is the largest tributary of the Clark Fork and constitutes over half of its flow.
The Columbia River Treaty is a 1961 agreement between Canada and the United States on the development and operation of dams in the upper Columbia River basin for power and flood control benefits in both countries. Four dams were constructed under this treaty: three in the Canadian province of British Columbia and one in the U.S. state of Montana.
Teck Resources Limited, known as Teck Cominco until late 2008, is a diversified natural resources company headquartered in Vancouver, British Columbia, that is engaged in mining and mineral development, including coal for the steelmaking industry, copper, zinc, and energy. Secondary products include lead, silver, gold, molybdenum, germanium, indium and cadmium. Teck Resources was formed from the amalgamation of Teck and Cominco in 2001.
The Kootenai National Forest is a national forest located in the far northwestern section of Montana and the northeasternmost lands in the Idaho panhandle in the United States, along the Canada–US border. Of the 2.2 million acres (8,900 km2) administered by the forest, less than 3 percent is located in the state of Idaho. Forest headquarters are located in Libby, Montana. There are local ranger district offices in Eureka, Fortine, Libby, Trout Creek, and Troy, Montana. About 53 percent of the 94,272-acre (381.51 km2) Cabinet Mountains Wilderness is located within the forest, with the balance lying in neighboring Kaniksu National Forest.
Libby Dam is a concrete gravity dam in the northwestern United States, on the Kootenai River in northwestern Montana. Dedicated on August 24, 1975, it is west of the continental divide, seventeen miles (27 km) upstream from the town of Libby.
The Rocky Mountain Trench, also known as the Valley of a Thousand Peaks or simply the Trench, is a large valley on the western side of the northern part of North America's Rocky Mountains. The Trench is both visually and cartographically a striking physiographic feature extending approximately 1,600 km (1,000 mi) from Flathead Lake, Montana, to the Liard River, just south of the British Columbia–Yukon border near Watson Lake, Yukon. The trench bottom is 3–16 km (1.9–9.9 mi) wide and is 600–900 m (2,000–3,000 ft) above sea level. The general orientation of the Trench is an almost straight 150/330° geographic north vector and has become convenient as a visual guide for aviators heading north or south.
Montana State Highway 37 is a 67.048-mile-long (107.903 km) state highway in the US state of Montana. It begins in downtown Libby, Montana at US 2 and takes a meandering course northeastwards upstream along the Kootenai River and the eastern shore of Lake Koocanusa before terminating at U.S. Route 93 at the northern end of Eureka, Montana. Previously, MT 37 also followed US 93 from Eureka into Whitefish and turned down what is now MT 40 towards US 2 and Glacier National Park until at least 1942.
The Elk Valley is a valley in the southeastern Kootenay region of British Columbia, Canada. Located in the heart of the Canadian Rockies, the Elk Valley is approximately 60 kilometres from the Alberta and Montana borders.
The Northern Transcon, a route operated by the BNSF Railway, traverses the most northerly route of any railroad in the western United States. This route was originally part of the Chicago, Burlington and Quincy Railroad, Northern Pacific Railway, Great Northern Railway and Spokane, Portland and Seattle Railway systems, merged into the Burlington Northern Railroad system in 1970.
Baynes Lake is an unincorporated rural community on the east shore of Lake Koocanusa, just north of the mouth of the Elk River, in the East Kootenay region of southeastern British Columbia. Off BC Highway 93, the locality is by road about 65 kilometres (40 mi) southEAST of Cranbrook and 44 kilometres (27 mi) southWEST of Fernie.
Eureka station was a station on the Great Northern Railway's Empire Builder in Eureka, Montana. It closed in 1970 when Lake Koocanusa was made, flooding The Kootenai River as well as Rexford, MT, where the lines used to run from Eureka to Libby. Around Stryker, the Flathead Tunnel was constructed to bypass Eureka and go to Libby.
The Lake Koocanusa Scenic Byway is a 67-mile (108 km) scenic highway in Lincoln County, Montana, USA, following the Kootenai River and the eastern shore of Lake Koocanusa on Highway 37. The road starts in Libby and proceeds north to Eureka. Lake Koocanusa is formed behind Libby Dam and has a visitors center nearby. The Kootenai River and Lake Koocanusa cut a narrow fjord-like gorge between the Purcell Mountains and the Salish Mountains. The byway is a popular route for visitors visiting the Kootenai National Forest. Snow removal crews work to keep the route open during the winter season. Lodging and services are available in Libby and Eureka.
Mount Polley mine is a Canadian gold and copper mine located in British Columbia near the towns of Williams Lake and Likely. It consists of two open-pit sites with an underground mining component and is owned and operated by the Mount Polley Mining Corporation, a wholly owned subsidiary of Imperial Metals. In 2013, the mine produced an output of 38,501,165 pounds (17,463,835 kg) of copper, 45,823 ounces of gold, and 123,999 of silver. The mill commenced operations in 1997 and was closed and placed on care and maintenance in 2019. The company owns 20,113 hectares (201.13 km2) of property near Quesnel Lake and Polley Lake where it has mining leases and operations on 2,007 hectares (20.07 km2) and mineral claims on 18,106 hectares (181.06 km2). Mineral concentrate is delivered by truck to the Port of Vancouver.
Coal in Alberta is found in the Coalspur Formation in the Western Canada Sedimentary Basin in the foothills of southwestern Alberta. The Coalspur Formation, which has large quantities of high-quality coal, runs from south of the Wapiti River to the North Saskatchewan River. The Coalspur coal zone is about 120 metres (390 ft) to 200 metres (660 ft) thick.