Kangsabati River (Pron:/ˌkæŋsəˈbɑːtɪ/) (also variously known as the Kãsai and Cossye) rises from the Chota Nagpur plateau in the state of West Bengal, India and passes through the districts of Purulia, Bankura, Jhargram , Paschim Medinipur and Purba Medinipur in West Bengal before draining in the Bay of Bengal.

The northern branch flows through the Daspur area, where it is known as the Palashpai Canal.

[1] In 1956, the Indian government launched the Kangsabati Irrigation Project (also called the Kangsabati Reservoir Project) to provide water for the irrigation of Bankura, Hooghly, and Midnapore districts (the last now partitioned into Paschim Medinipur and Purba Medinipur districts).

[3] It is an earthen gravity dam with a concrete saddle spillway, standing 38 metres (125 ft) high and 10,098 m (33,130 ft) long with a gross storage capacity of 1.04 cubic kms (36.73 tmcft).

[4] As of August 2008[update], the dam provided water to just under 3,500 square kilometres (1,400 sq mi) of land.