MOUTH is HOOGHLY River, Rupnarayan River.The river bifurcates into two channels at Beguahana.The main flow passes through the Mundeswari CHANNEL and discharges into Rupnarayan.The other one Amta channel carries discharge during high floods and outfalls into the Hooghly.There are 4 dams on the Damodar river:Tilaiya dam on Barakar river.Konar dam.Maithon dam.Panchet hill dam.The tributaries of the Hooghly river are Mayurakshi, Jalangi, Ajay, Damodar, Rupnarayan, and Haldi rivers.Damodar valley is home to the LARGEST coal MINES in the Jharkhand-West Bengal coal belt located in Jharia (largest coalfield of India)