Damdamaa reservoir in Sohna, district in the Indian state of Haryana. It is one of the biggest lakes in Haryana and with an area of 3,000 acres (12.14 km2). Damdama Lake 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).