Lake Salagou (French: lac du Salagou) is a reservoir formed by the . It is located in the central part of the Hérault department in southern France, on the Salagou river, a tributary of the , which in turn flows into the Hérault River.
Geography The lake has an average depth of 15 metres and a maximum measured depth of 50 metres. Its normal operating level is 139 metres above sea level. The original plan envisaged raising the level to 150 metres, which would have submerged the village of Celles. Although the village was evacuated, the higher level was never implemented; in 1996, the maximum level was definitively fixed at 139 metres. The lake covers approximately 750 hectares and has a storage capacity of 103 million cubic metres.
The surrounding mountains and plateaus rise to 300 metres in the east and 407 metres at Carels in the west. To the south, Mont Liausson rises to 535 metres and forms a natural barrier between Lake Salagou and the dolomitic .
Communes The lake extends across six communes: Celles, Clermont-l'Hérault, Le Puech, Liausson, Octon, Salasc.
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