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Thread: Grande Dixence Dam - Switzerland discussion

  1. #1
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    Jul 2005

    Default Grande Dixence Dam - Switzerland discussion

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    Grande Dixence Dam - Switzerland

    The Grande Dixence dam, in the canton of Valais in Switzerland, is at 285 metres high one of the worlds tallest dams. It holds back a lake, the Lac des Dix, around 16 km long.

    The top of the dam is at an altitude of 2,365 metres in a steep mountain valley. Tunnels bring the water to three power stations in the Rhone valley over 1,800 metres below.

    The dam is situated on the relatively small Dixence river, but collects a large amount of water thanks to a system of water supply tunnels over 100km long bringing water from other rivers and valleys. Most of the water comes from glaciers which melt during the summer. The lake is usually full of water by late September, and is allowed to empty during the winter, reaching its lowest point around April.

    The first Grande Dixence Dam was constructed between 1929 and 1935. A second dam that would flood the first was built between 1951 and 1965, and was filled on July 17, 1957. The first dam can still be seen when the water level is particularly low.

  2. #2
    Junior Member
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    Sep 2005


    The dam is indeed quite impressive. I did have the pleasure to visit it back in 1994. For those in command of the French language, more information can be found at

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