lake Arnen
Gsteig bei Gstaad, Switzerland
Arnensee (Lac d'Arnon) is a lake in canton of Bern, Switzerland. The lake in the municipality of Gsteig is used as a reservoir by Romande Energie. The dam was built in 1942. Its volume is 10.5 million m3 and surface area 0.456 km2.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).