Collecting works

Bringing together waters from a catchment area of 420 km2, two-thirds of which is covered in glaciers, that is the task of the facility's network collector. 100 kilometres of galleries, including a main tunnel which is 24 kilometres long, at an altitude of 2,400 metres, in the heart of the mountain, bring together the waters which run between the Mischabel, Matterhorn and Mont Gelé mountains. 35 glaciers therefore supply the facility's raw material, via 75 water intakes and 5 pumping plants, on average around 500 million m3 of water every year.