Located at the foot of the Matterhorn at an altitude of 2,180 metres, the Stafel pumping station pumps some 70 million cubic metres of water per year. It is fed by the meltwater from the Z’Mutt glacier. The station channels this water up to the level of the collection conduit, 250 metres higher up. The pumping station has two large sand traps and a compensating basin.
Set at the foot of the Mattertal, the Z’Mutt pumping station (alt. 1972 m) is the most powerful within the Grande Dixence complex. It is fed by water from the Bis and Schali glaciers which rise above the Visp river, and from the Gorner glacier.
Located deep in the Hérens valley (alt. 1896 m), the Ferpècle pumpingstation collects the water from the Ferpècle and Mont Miné glaciers.Every year, 3 pumps transfer around 60 million m3 of water up the 212-metre gulley to the Arolla pumping station via the Maya reservoir.The total output from the facility is 8.4 m3 / second.
After the Z’Mutt pumping station, Arolla is the most powerful station at the Grande Dixence site. It receives the water already pumped via Ferpècle, supplementing it with water from the Tsidjiore Nouve and Bertol glaciers. The Arolla facility collects and discharges around 90 million m3 of water every year. Three 16.2 MW dual-inlet pumps each transfer 4.2 m3 of water per second a height of 312 metres.