Damdama reservoir in Sohna, near Gurugram city in Gurugram district in the Indian state of Haryana. Damdama Lake is a small lake in Haryana and was formed when a stone and earthen dam constructed by the British was commissioned for rain water harvesting in 1947. The lake, held by an embankment, is fed mainly by monsoon rain pouring into a trough at the base of the Aravali hills. The lake greets visitors with a water level down to 20 ft (6.1 m). During monsoon the water level reaches up to 50 ft (15 m) - 70 ft (21 m).