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Heightening of Vieux Emosson Dam

In the framework of the construction of the new Nant de Drance Pumped Storage Scheme it was decided to increase the rated capacity from 600 to 900 MW, which implied to increase the capacity of the upper reservoir. The existing Vieil Emosson Dam, an arch gravity dam, was thus converted into an arch dam by heightening it from 55 to 76.5 m.

Engineering, from the feasibility study to the work supervision and commissioning