| Lac de Grand Maison | |
|---|---|
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  Lac de Grand Maison | |
| Location | Isère |
| Coordinates | 45°12′20″N 6°7′30″E / 45.20556°N 6.12500°E |
| Type | 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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