Lac de Grand Maison

45°12′20″N 6°7′30″E / 45.20556°N 6.12500°E / 45.20556; 6.12500TypeartificialPrimary inflowsEau d'OlleBasin countriesFranceSurface area2.19 km2 (0.85 sq mi)Max. depth90 m (300 ft)Surface elevation1,698 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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