Wikipedia
Gelmersee
Gelmersee (or Lake Gelmer) is a reservoir in Bernese Oberland, Switzerland. The hydroelectric reservoir was built at the same time as Grimselsee, and is operated by Kraftwerke Oberhasli. The reservoir's volume is 13 million m³ and its surface area 0.645 km².
The reservoir may be reached by the Gelmerbahn from Handegg, Guttannen at 1,412 m. The funicular's track with a length of 1,028 m has a maximum inclination of 106%.