Wiestalstausee, reservoir in Austria
The Wiestalstausee is an artificial reservoir located where Ebenau, Puch bei Hallein, and Adnet meet near Salzburg. The lake stretches approximately four kilometers long at about 561 meters elevation and is fed by mountain streams including the Oberalm and Moertlbach, with the dam positioned at its southwestern end.
The reservoir was constructed between 1909 and 1913 to generate electricity and control flooding for the Salzburg region. After World War II, the dam was raised by two meters to increase storage capacity and enable greater water supply for power generation.
The lake takes its name from the Wiestal valley, historically home to fishing communities and farmers in the region. Today, visitors engage in swimming, paddling, and fishing, while local groups maintain these longstanding traditions.
The shoreline is steep and narrow in places, so sturdy shoes are recommended and strollers are not suitable everywhere. The L107 road runs along the lake with scenic viewpoints, and pebbly areas on the shore provide quiet spots for swimming and paddling without crowds.
Below the dam lies the Almbachklamm, a rugged and untouched canyon that many visitors overlook, yet it offers thrilling canyoning experiences through waterfalls and pools. This hidden gorge is accessible only to experienced hikers or those joining a guided tour.
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