Valgrisenche’s landscape is strictly tied to the Beauregard dam; as a matter of fact, this cement barrier built in 1954 completely closes off the valley. Situated at an altitude of 1.700 meters, the dam is 132 meters high with a 70 million cubic metre water capacity. The lake is 4 kilometres long and its waters feed the Avise hydroelectric plant. This dam, following gravity arch type criteria, was built in the 50’s to create an enormous water reserve for hydroelectric use. The dam is considerably large but the water level is kept under maximum capacity for safety reasons. In fact, technical surveys have demonstrated that the dam cannot be used at maximum capacity. Currently, the maximum capacity is 6.8 million cubic metres. The dam is 428 metres long and can be crossed by car or on foot providing a magnificent view of the entire valley.

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