Wikipedia
Gübsensee
Gübsensee is a reservoir near the city of St. Gallen, Switzerland. Its dams were built between 1898 and 1900, the first hydroelectric reservoir in Switzerland. Kraftwerk Kubel has generated electrical power there since 1900.
Gübsensee Ost is a gravity dam with a height of 24 m, Gübsensee West an earthfill dam.
The lake's surface area is 0.17 km². Its volume is 1.5 mio m³.