Lake of Serre-Poncon
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General data
- Name: Lake of Serre-Poncon
- Water system: Rhone
- Water type: Artificial lake
- Progression: Durance -> Rhone -> Mediterranean Sea -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: Europe
- Countries: France
The Lac de Serre-Ponçon, known in English as the Lake of Serre-Ponçon, is a reservoir on the border between the Hautes-Alpes and Alpes-de-Haute-Provence departments, in the Provence-Alpes-Côte d'Azur region, Southeastern 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.
The waters are dammed by the Barrage de Serre-Ponçon, a 123-metre high earth core dam. As well as water control, sixteen hydroelectric plants use the water, with additional water control supporting; the lake provides irrigation to 1,500 square kilometres of land. Its surface area is 28 km2 and max. depth 90 m.