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Gösgen hydropower plant, modernisation of the Winznau weir

The Winznau weir requires refurbishment in order to comply with guidelines and regulations relating to discharge capacity and seismic safety. Between 2023 and 2030, Alpiq Hydro Aare AG will implement the renovation of the structure. All information on the consultation process here:

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.

Who is Alpiq Hydro Aare AG?

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.

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