Tannensee
Canton of Obwalden, Switzerland
Tannensee is a reservoir in Obwalden, Switzerland. In 1958, Tannenbach and few other creeks were dammed with an earth-fill dam. The reservoir has a volume of 3.8 mio m³ and its surface area is 33 ha (82 acres). The reservoir is used to generate electricity at Kraftwerk Hugschwendi in Kerns.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).