The catchment area is 404 sq. kms, which is equivalent to more than 56 500 football fields, and consists of nine lakes. The water is gathered in reservoirs high up in the mountains and directed through tunnels to the station. Since the reservoir is designed to hold large quantities of water, the production can be altered based on electricity demand.
While the reservoirs are located high up in the mountain, the power station itself is partly set inside the mountain towards the bottom of the valley. The façade of the power station is relatively indiscernible on the surface while the station itself, with its impressive machinery, lies 160 meters beneath the ground. To access the turbine room, one has to drive almost 2 kms through the tunnels down in the mountains.