Styrian-Lower Austrian Limestone Alps

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The Styrian-Lower Austrian Limestone Alps are the easternmost part of the Northern Limestone Alps , from the Enns to the Vienna Basin . These include the high- limestone massifs Hochschwab , Veitsch , Schneealpe , Rax and Schneeberg , the Ötscher and, north of it, the limestone foothills to the Flysch zone .

The geological conditions in the Kalkgebirge make this part of the Limestone Alps a valuable drinking water reservoir, from which Vienna's water supply also starts. The geologist Eduard Suess advocated a water pipeline from this area in the Vienna City Council as early as 1864. In 1873 this first Viennese spring water pipeline from the Rax-Schneeberg area was opened.

The second Viennese high spring water pipeline was opened in 1910 and also draws its water from the area of ​​the Styrian-Lower Austrian Limestone Alps, it is fed from springs in the Hochschwab area near Wildalpen . The largest spring is the Kläffer spring at the foot of the Hochschwab , in the Styrian Salzatal . When the snow melts, this spring delivers 860 million liters per day, four times more than can be transported to Vienna via the high spring water pipeline. The Vienna Forest Administration looks after the forests in the catchment area of ​​the springs, which are designated as a water protection area. Large parts of the forest also belong to Admont Abbey .