Klöntalersee is a natural lake in the canton of Glarus, Switzerland and covers the major part of the valley floor. Since 1908, it has been used as a reservoir for electricity production. The dam's construction substantially increased the lake's volume. Klöntalersee is drained by the Löntsch, a left tributary of the Linth. See also List of lakes of Switzerland List of mountain lakes of Switzerland External links Lakes of the canton of Glarus Lakes of Switzerland LKlontalersee