About: Libby Dam

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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. At 422 feet (129 m) in height and a length of 3,055 feet (931 m), Libby Dam created Lake Koocanusa, a reservoir which extends ninety miles (140 km) upriver with a maximum depth of about 370 feet (110 m). Forty-two miles (68 km) of it are in Canada in southeastern British Columbia.

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  • Der Libby Dam ist ein Staudamm am Kootenay River im US-Bundesstaat Montana. Er staut den Fluss zum Lake Koocanusa auf. Der Stausee gehört zum Flusssystem des Columbia River. (de)
  • 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. At 422 feet (129 m) in height and a length of 3,055 feet (931 m), Libby Dam created Lake Koocanusa, a reservoir which extends ninety miles (140 km) upriver with a maximum depth of about 370 feet (110 m). Forty-two miles (68 km) of it are in Canada in southeastern British Columbia. Lake Koocanusa was named for the treaty that was developed between the Kootenai Indians, the Canadian government, and the U.S. government to build the dam and form the reservoir. It was the fourth dam constructed under the Columbia River Treaty. The Kootenai River is the third largest tributary to the Columbia River, contributing almost twenty percent of the total water in the lower Columbia. Libby Dam has the capacity to hold back 4,980,000 acre-feet (6.14 km3) of water. The consulting architect for the project was Paul Thiry of Seattle, and the commission for its large granite bas-relief was awarded to sculptor Albert Wein by competition. In order to make way for the dam, the town of Rexford was relocated and a new Flathead Railroad Tunnel was dug. Construction began in 1966, and the reservoir was available for filling in mid-1973. The dam is operated by the U.S. Army Corps of Engineers and at full capacity, it can pass over 160,000 cubic feet per second (4,500 m3/s) of water. The dam is designed with a selective withdrawal system that allows water passage from various levels of Lake Koocanusa, which allows the operators to moderate water temperatures downstream. The river continues northwest into Idaho, past Bonners Ferry, to Kootenay Lake in Canada and joins the Columbia River. Libby Dam's powerhouse contains five turbines and is capable of generating 600 megawatts. The electricity is managed by the Bonneville Power Administration and services eight states: Montana, Idaho, Washington, Wyoming, California, Utah, Oregon, and Nevada. The money earned from electricity sales goes to the United States Treasury to repay the cost of building and operating Libby Dam. President Gerald Ford was among the five thousand in attendance at the opening in 1975, along with Senator Mike Mansfield, the majority leader, and Governor Thomas Judge. At his first official event after a two-week vacation in Vail, Colorado, Ford "threw the switch" with Donald Macdonald, Canadian minister of energy. (en)
  • La diga di Libby è una diga sul fiume Kootenai, nello stato del Montana. Inaugurata il 24 agosto del 1975, la diga di Libby sbarra il fiume Kootenai a 17 miglia (27 chilometri) a monte della città di Libby. La diga di Libby è alta 422 piedi (129 m) e lunga 3.055 piedi (931 m). Il serbatoio della diga forma il lago Koocanusa, che si estende per 90 miglia (140 chilometri) a monte della diga ed ha una profondità massima di circa 370 piedi (110 m). Quarantadue miglia (68 chilometri) del lago di Koocanusa si trovano nella Columbia Britannica, in Canada. Il nome Koocanusa deriva dal nome del trattato stipulato dalla locale popolazione indiana dei Kootenai, il governo canadese e il governo degli Stati Uniti per la costruzione della diga. È la quarta diga costruita sotto il Trattato del fiume Columbia. Il fiume Kootenai è il terzo più grande affluente del fiume Columbia, contribuendo con quasi il 20% del totale dell'acqua del Columbia inferiore. Il bacino della diga di Libby trattiene una media di 7,2 km³ di acqua. Il progetto per la realizzazione della diga fu affidato all'architetto Paul Thiry di Seattle, mentre le sue grandi opere di bassorilievo in granito furono commissionate allo scultore Albert Wein. Per far posto alla diga, la città di Rexford fu trasferita in un luogo più in alto e venne scavato il Flathead Railroad Tunnel. Mappa delle grandi dighe e bacini del fiume Kootenai La diga è gestita dall'United States Army Corps of Engineers. A regime, nella diga possono scorrere fino a 4.500 m³/s di acqua. La diga è stata progettata con un sistema di prelievo selettivo che permette il passaggio dell'acqua da vari livelli del Lago Koocanusa. Questo consente agli operatori della diga di regolare la temperatura dell'acqua a valle. Il fiume continua attraversando la città di Bonners Ferry, in Idaho, fino al Lago Kootenay e si unisce al fiume Columbia. La diga di Libby possiede cinque turbine ed è in grado di generare 600 megawatt. L'elettricità è gestita dalla Bonneville Power Administration e serve otto stati: Montana, Idaho, Washington, Wyoming, California, Utah, Oregon e Nevada. Il ricavo dalla vendita di energia elettrica è introitato dal Tesoro degli Stati Uniti a rimborsare il costo di costruzione e di funzionamento dell'impianto. (it)
  • ГЕС Ліббі — гідроелектростанція у штаті Монтана (Сполучені Штати Америки). Знаходячись перед ГЕС Кутеней-Канал та ГЕС Corra Linn (49 МВт) (обидві в Канаді), становить верхній ступінь каскаду на річці Кутеней, лівій притоці Колумбії (має устя на узбережжі Тихого океану на межі штатів Вашингтон та Орегон). У межах проекту річку перекрили бетонною греблею висотою 129 метрів, довжиною 931 метр та товщиною від 16 (по гребеню) до 94 (по основі) метрів, яка потребувала 7,6 млн тонн матеріалу. Вона утримує витягнуте по долині Кутеней на 145 км водосховище Koocanusa з площею поверхні 188 км2 та об'ємом 7,24 млрд м3 (корисний об'єм 6,14 млрд м3), в якому можливе коливання рівня в операційному режимі між позначками 697 та 750 метрів НРМ. Пригреблевий машинний зал обладнано п'ятьма турбінами типу Френсіс потужністю по 120 МВт, які працюють при напорі 104 метри. (uk)
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  • Der Libby Dam ist ein Staudamm am Kootenay River im US-Bundesstaat Montana. Er staut den Fluss zum Lake Koocanusa auf. Der Stausee gehört zum Flusssystem des Columbia River. (de)
  • 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. At 422 feet (129 m) in height and a length of 3,055 feet (931 m), Libby Dam created Lake Koocanusa, a reservoir which extends ninety miles (140 km) upriver with a maximum depth of about 370 feet (110 m). Forty-two miles (68 km) of it are in Canada in southeastern British Columbia. (en)
  • La diga di Libby è una diga sul fiume Kootenai, nello stato del Montana. Inaugurata il 24 agosto del 1975, la diga di Libby sbarra il fiume Kootenai a 17 miglia (27 chilometri) a monte della città di Libby. La diga di Libby è alta 422 piedi (129 m) e lunga 3.055 piedi (931 m). Il serbatoio della diga forma il lago Koocanusa, che si estende per 90 miglia (140 chilometri) a monte della diga ed ha una profondità massima di circa 370 piedi (110 m). Quarantadue miglia (68 chilometri) del lago di Koocanusa si trovano nella Columbia Britannica, in Canada. Il nome Koocanusa deriva dal nome del trattato stipulato dalla locale popolazione indiana dei Kootenai, il governo canadese e il governo degli Stati Uniti per la costruzione della diga. È la quarta diga costruita sotto il Trattato del fiume Colu (it)
  • ГЕС Ліббі — гідроелектростанція у штаті Монтана (Сполучені Штати Америки). Знаходячись перед ГЕС Кутеней-Канал та ГЕС Corra Linn (49 МВт) (обидві в Канаді), становить верхній ступінь каскаду на річці Кутеней, лівій притоці Колумбії (має устя на узбережжі Тихого океану на межі штатів Вашингтон та Орегон). Пригреблевий машинний зал обладнано п'ятьма турбінами типу Френсіс потужністю по 120 МВт, які працюють при напорі 104 метри. (uk)
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  • Libby Dam (en)
  • Libby Dam (de)
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