The Ferpècle pumping station, fed by water from the glacier of the same name, is situated in the depths of the Val d’Hérens. Each year, 3 pumps send approximately 60 million cubic metres of water 212 metres upwards towards the Arolla valley, via the La Maya reservoir. The total flow rate from the station is 8.4 m3 per second.

The facility is hidden inside the mountain. Only a dam and a sand trap are visible. To prevent floodwater penetrating the installations, the intake at Ferpècle has a flow limiter system restricting entry to the sand trap.

Balancing reservoir Construction 1962 Commissioned 1964 Height 25,5 m Crest 91 m Capacity 100'000 m3 Area 1,1 hectares Type arch dam

Pumping station Power 21,3 MW Flow rate 8,4 m3/s Lift height 212 m