Wiestalstausee, reservoir in Austria

The Wiestalstausee is a reservoir in the Wiestal valley in the Salzkammergut mountains, within the municipalities of Puch bei Hallein, Ebenau and Adnet. Its 28 m high gravity dam has a curved crest 66 m long and impounds the Almbach at a storage level of 554.6 m above sea level. The lake covers 120 hectares, making it the largest reservoir built in the Austro-Hungarian monarchy.

Built between 1909 and 1913, the reservoir was created by a 28 m high gravity dam with a 66 m long curved crest, above the Wiestalklamm. With a surface of 120 ha it is the largest reservoir built in the Austro-Hungarian Monarchy. It originally supplied the isolated grid of Salzburg and its surroundings; today it stores water for the 28 MW Wiestal pumped-storage plant of Salzburg AG.

The reservoir is named after the Wiestal valley and was built between 1909 and 1913 to supply the island grid of Salzburg and its surroundings. Its 28 m gravity dam has a curved crest 66 m long. Since 1960 the lake and its surroundings have been a protected landscape area of Salzburg.

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.

The reservoir was built between 1909 and 1913 with a 28-metre-high gravity dam whose curved crest is 66 metres long. With a surface of 120 hectares it is the largest reservoir built in the Austro-Hungarian Monarchy. It stores 7.5 million cubic metres of water for the 28 MW Wiestal power plant of Salzburg AG, and since 1960 the lake and its surroundings have been a protected landscape.