Grimselsee

Grimselsee Lake Grimsel

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Location	Canton of Berne
Coordinates	46°34′10.52″N, 8°19′38.66″ECoordinates: 46°34′10.52″N, 8°19′38.66″E
Lake type	artificial lake, hydroelectric reservoir
Primary inflows	Oberaarbach, Treibtenbach
Primary outflows	Aar River
Catchment area	74.4 km²
Basin countries	Switzerland
Surface area	2.63 km²
Water volume	95 mio m³
Surface elevation	1,908 m

Grimselsee or Lake Grimsel is an artificial lake near Grimsel pass in the Canton of Berne, Switzerland. With a volume of 95 mio m³, it is larger than other hydroelectric reservoirs in the region: Oberaarsee, Räterichsbodensee and Gelmersee. The dam was completed in 1932 and is operated by Kraftwerke Oberhasli AG (KWO). It is located in the municipality of Guttannen.