arriving at the Fionnay Power Station from the Grande Dixence Dam, water then travels through a pressure tunnel which eventually leads into the Péroua surge chamber, above the Nendaz Power Station. The water, which remains at a maximum rate of spins six Pelton turbines, generating a combined maximum capacity of . The Nendaz power station is located within mountains between Aproz and Riddes and is the second-largest hydroelectric power station in Switzerland after the Bieudron Power Station. Bieudron Power Station The water travels down a long penstock from the Grande Dixence Dam before reaching the Bieudron Power Station down. The water spins three pelton turbines, generating a combined capacity of . The power station was constructed after the Nendaz and Fionnay power stations. The power station was built by both Grande Dixence SA and Energie Ouest Suisse between 1993 and 1998 at a cost of US$1.2 billion. The Bieudron Power Station alone holds three world records, for the height of its head (), the output of each Pelton turbine and the output per pole of the generators . It was taken out of service in December 2000 after the rupture of a penstock. The power station became partially operational in December 2009 and fully operational in 2010. See also List of lakes of Switzerland List of mountain lakes of Switzerland References External links Grande Dixence Cycling Profile for route to La Grande Dixence Dams in Switzerland Gravity dams Buildings and structures in Valais Tourist attractions in Switzerland Dams completed in 1961 Lakes of Valais 20th-century architecture in Switzerland