Lac de Serre-Poncon

Lake Serre-Ponçon (French: Lac de Serre-Ponçon; Vivaro-Alpine: Lac de Sèrra Ponçon) is a reservoir in the departments of Hautes-Alpes and Alpes-de-Haute-Provence, Provence-Alpes-Côte d'Azur region, in southeast France, one of the largest in Western Europe. The lake gathers the waters of the Durance and the Ubaye rivers, flowing down through the Hautes-Alpes and the Alpes du Sud to the Rhône River. The waters are dammed by the Barrage de Serre-Ponçon, a 123-metre (404 ft) high earth core dam.
As well as water control, sixteen hydroelectric plants use the water (with additional water control supporting), and the lake provides irrigation to 1,500 square kilometres (580 sq mi) of land.
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