In the hinterland of Porto-Vecchio, near the mountain village of L'Ospedale, an eponymous artificial lake supplies drinking water to the south of Corsica. In the spring, the melting snow flows from the Incudine Mount'slopes, the highest peak of Corse-du-Sud (2,134 m / 7,001 ft). Waters are diverted and blocked by a dam, which creates a reservoir of 3 million m³. After irrigating the plain all summer long, the lake is dry in fall.