Reschensee
Lake Reschen is a reservoir in the municipality of Graun in western South Tyrol, which serves as an upper basin for the Glurns storage power plant. The lake is located just south of the Reschen Pass in the Vinschgau or Vinschger Oberland, the highest section of the Adige Valley.
The water of the Etsch, the Rojenbach, the Karlinbach and some smaller tributaries is dammed in Lake Reschen. The artificial lake, six kilometers long and around one kilometer wide at its widest point, has a storage volume of 120 million m³, which is almost entirely used as a storage volume and thus forms a so-called annual storage facility. The water from the reservoir is conveyed via a twelve-kilometer-long pressure tunnel with a diameter of three meters on the left side of the valley to above the cavern power plant near Schluderns, where it drives two 52.5 MVA generators with a head of 586 meters via two Pelton turbines each. The average annual production of electrical energy is around 250 gigawatt hours.
In the immediate vicinity of the lake are the municipality's main town, Graun, the villages of Reschen and St. Valentin auf der Haide, as well as the hamlets of Kaschon and Spin.
Until the lake was dammed in 1950, there were three lakes on the Reschen Pass: Lake Reschen, Lake Mittersee (also called Grauner Lake) and Haidersee, which still exists today. When the lake was dammed, the entire village of Graun and a large part of the village of Reschen sank into the waters of the reservoir, a total of 163 houses and 523 hectares of fertile cultivated land were flooded. Today only the church tower protruding from Lake Reschen remains evidence of the flooded Alt-Graun.
Text: Wikipedia