Lac de Grand Maison

Lac de Grand Maison
Location	Isère
Coordinates	45°12′20″N 6°7′30″E / 45.20556°N 6.12500°E / 45.20556; 6.12500Coordinates: 45°12′20″N 6°7′30″E / 45.20556°N 6.12500°E / 45.20556; 6.12500
Type	artificial
Primary inflows	Eau d'Olle
Basin countries	France
Surface area	2.19 km²
Max. depth	90 m
Surface elevation	1698 m

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 and serves as the upper reservoir in a pumped-storage hydroelectric scheme.

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