The Quart run-of-river hydroelectric plant is built in a cave inside the mountain and is located opposite the Nus plant. The plant is located almost entirely in a tunnel with its long diversion canal that also collects, passing through Aosta, the waters of the Buthier stream.

The generator unit is peculiar: it consists of an alternator placed in the middle of two turbines, connected to it with special pneumatically driven peg joints, which allow the alternator to operate either with only one turbine or with both water turbines at the same time. The 220 kV power station is located outside.

Quart’s production step-up transformer was built with double primary winding so that it could transform and feed into the grid the energy from Quart produced at 10 kV and the energy from Nus produced at 6 kV: a concentrate of renewable hydropower for the benefit of the whole community.

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