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Auma-Solutions for a world in motion

Cooling systems sought for Vissoie in Switzerland

Forces Motrices de la Gougra SA, a majority-owned subsidiary of Alpiq Suisse, invites sealed bids by 4 November from qualified contractors for the engineering, manufacture, supply, installation and commissioning of three closed loop cooling water systems at the 45 MW Vissoie hydropower plant in the district of Sierre in the Swiss canton of Valais.

The Vissoie power station, which is supplied by the Mottec compensation basin, was commissioned in 1958. The rehabilitation project entails the replacement of the existing cooling units and the existing distributor by three new closed circuit cooling systems with a power of 24 MVA. The contractor must show evidence of having designed, built, installed and commissioned at least three welded design stainless steel piping systems in the range of nominal diameters greater than DN80 in the past 10 years. The contracted works are expected to start this December and be completed by 16 September 2029.

The Vissoie station, which is equipped with three Pelton turbines, is part of the 168 MW Gougra hydropower complex, which also comprises the Mottec and Chippis (Navizence) plants. The Gougra power complex harnesses the power of the waters from Val d’Anniviers and the Turtmann Valley, which are stored principally by the 148 m-high Moiry dam. Alpiq SA holds a 54 per cent stake in Forces Motrices de la Gougra SA, with 27.5 per cent owned by Rhonewerke AG, and the remaining shareholdings held by the local communes of Sierre, Anniviers, Chippis and Chalais.

Access to the procurement documents is restricted. Further information can be obtained at: Tenders or requests to participate must be submitted to the below-mentioned address. For additional information, contact:

Carlo Clivaz, Forces Motrices de la Goudra SA, c/o Alpiq SA, Avenue de France 10, Sion 1950, Switzerland; E-mail:;