The Grande Dixence dam in Switzerland

The Grande Dixence dam is pictured with the Lac des Dix in Pralong near Sion in southern Switzerland August 16, 2008. Hydroelectric power accounts for about 58% of Switzerland's electricity production. The dam, situated at 2365 meters above sea level, has a height of 285 metres and is the highest gravity dam in the world. It weighs 15 million tonnes, was made with 6 million cubic metres of concrete and has a water capacity of 400 million cubic metres, collecting water from 35 surrounding glaciers.