The Grand Eyvia run-of-river hydroelectric plant is located leaning against the left orographic bank of the rocks in the narrow gorge of the Grand Eyvia Stream. The Grand Eyvia power plant is among CVA’s 5 small hydroelectric plants, which have a capacity of less than 5 MW. The installed TAT (Tubular Axial Turbine) is a very simplified water turbine: it is basically a propeller inserted into the pipeline connecting the two channels. The power supplied is based on the amount of water flowing through the pipe, which is protected by a sluice gate at the inlet.

The crankshaft supporting the propeller emerges from the pipe through a suitable hydraulic seal and transmits the energy to the alternator by means of a speed increaser. The renewable electrical energy produced by the alternator is taken directly to the Aymavilles power plant through underwater cables installed in the hydroelectric canal connecting the two plants, where it is then elevated and fed into the 132 kV grid.

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