Obere Schleuse
Sebnitz, Czechia
The Obere Schleuse in Hinterhermsdorf is a barrage system on the German-Czech border river of Kirnitzsch and impounds the water over a length of 700 metres. It was originally a facility for timber rafting. There are boat rides on the reservoir today during the summer months. At the boat landing point the water depth is 1 metre; by the dam it is 4 metres. The water temperature rarely climbs above 8 °C in summer. In the winter months, when there are no boat trips, the water is not impounded and the Kirnitzsch flows in its original river bed.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).