Lac de Grand Maison
45°12′20″N 6°7′30″E / 45.20556°N 6.12500°E / 45.20556; 6.12500Type artificial Primary inflows Eau d'Olle Basin countries France Surface area 2.19 km2 (0.85 sq mi) Max. depth 90 m (300 ft) Surface elevation 1,698 m (5,571 ft)
Lac de Grand Maison is a lake in Isère, France. At an elevation of 1698 m, its surface area is 2.19 km2. It is created by the Grand'Maison Dam (constructed between 1978 and 1985) and serves as the upper reservoir in a pumped-storage hydroelectric scheme.
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