The Valpelline reservoir hydroelectric plant, in addition to being the largest in the Aosta Valley, is a plant of national importance, included in the 220 kV power grid restart plan in the event of a total blackout. Its annual renewable energy production amounts to 330 GWh.

The plant is fed by the Place Moulin dam, located at an altitude of nearly 2,000 meters above sea level (with about 1,000 meters difference in elevation from the Valpelline power plant).
The power plant’s engine room features the huge, modern glass window facing the valley meadow. The area is furrowed by the four turbine discharge channels, which join at a single point with the channel of the intake structure on the Buthier stream of the Signayes plant, to either convey all the flow to the power plant below or return the same water to the Buthier stream bed.

The step-up transformers of the two generator sets are of the single-phase type, installed with the high-voltage equipment in the outdoor electrical station.
 

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