Griessee

Griessee is a lake in Valais, Switzerland. The reservoir is located in the municipality of Ulrichen and can be reached by road from Nufenen Pass. The lake is fed by the Gries Glacier. Its surface area is 55.5 ha (137 acres). The gravity dam Gries was built in 1965.

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