Grimselsee

Guttannen, Switzerland

The Grimselsee or Lake Grimsel is an artificial lake near the Grimsel Pass in the Canton of Bern, Switzerland. With a volume of 95 million m3 (21 billion imperial gallons, 25 billion US gallons), it is larger than other hydroelectric reservoirs in the Aare headwaters 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.

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Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).

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