The first dam was built in Val des Dix as early as 1934. Grande Dixence, built in the years from 1951 to 1965, is a construction of incredible magnitude. It is 200 meters thick at the base, 695 meters long and 285 meters high. Six million cubic meters of concrete were required for the construction of the dam. The large reservoir holds 400 million cubic meters of water, which is channeled into the lake through 100 kilometers of tunnels.
Guided tours with slide shows and films take place in the interior of the dam. An aerial cable car takes visitors to the top of the dam, which has a magnificent panoramic view of the Valaisian mountains. A variety of mountain hikes begin here, such as the high altitude Ibex Trail , which was established by the Grande Dixence S.A. in collaboration with Pro Natura Valais.
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