On October 20 2024, Grande Dixence SA celebrated the official ­recommissioning of their turbine houses at Fionnay and Nendaz, and the penstock that runs from the Lac des Dix to the plain of the river Rhône. The original facilities of the hydropower plants, which date back to the 1960s, were completely renovated and taken back into operation in stages, starting in early 2023. The six machine combinations at each of the two turbine houses in Fionnay and Nendaz had their valves, turbines, generators, automatic control mechanisms and ancillary systems refurbished. Grande Dixence SA and its shareholders have invested a total of CHF 240 million in the complex renovation project. Thanks to the comprehensive refurbishment, the facility is now ready and able to contribute to the reliable supply of energy in Switzerland.