For 70 years, EDF has been designing, building, renovating and operating one of Europe's largest hydroelectric plants... Hydroelectric production: technical and environmental know-how. On a technical level, EDF's two hydroelectric engineering units are involved in the entire production chain, both upstream (feasibility studies, construction, rehabilitation, etc .) and downstream (operation, monitoring of hydro-meteorological forecasts, etc .) . On an environmental level, EDF specialists provide expertise in hydrology, sedimentology, the conservation of rivers, and aquatic biology.