"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 m\u00B3 and its surface area is 0.33 km\u00B2. The reservoir is used to generate electricity at Kraftwerk Hugschwendi in Kerns."@en . . "330000.0"^^ . . "1976.0"^^ . . "3.8e+06"^^ . . . "Tannensee"@en . . "1.3e+06"^^ . .