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The new concession for the operation of the Gösgen hydropower plant entered into force on 1 January 2020. Among other things, it encompasses the modernisation of the Winznau weir. The reconstruction and modifications are based on the latest federal legal provisions and take into account future requirements with regard to flood and seismic safety. In order to meet these requirements, Alpiq is completely modernising the weir, which dates back more than 100 years. The construction work began at the end of 2022 and will take approximately five years.
Alpiq Hydro Aare AG is a wholly owned subsidiary of Alpiq. The company owns and operates the three run-of-river power plants on the River Aare in the canton of Solothurn.
1 Modernisation of the Winznau weir
2 Reinforcement of the embankments along the Aare Canal
3 New fish ladder at the Gösgen hydropower plant
Other compensatory and substitution measures
|Alpiq, story on the reinforcement of the Aare Canal between Winznau and Niedergösgen, September 2022 (in German only)|
|Alpiq, media release on the new concession for the Gösgen hydropower plant, September 2020|
|Canton of Solothurn, Environment Office: Information on the renewal of the concession for Gösgen, 2012 (in German only)|