Hasdeo River is the largest tributary of Mahanadi River. The river flows in the state of Chhattisgarh. It joins Mahanadi River near Shiladehi a village in Janjgir-Champa district. Minimata Dam which commonly known as Hasdeo Bango Dam is constructed across this river near Bango village. The river originates about 910.0 m above sea level, in a place about …Hasdeo River is the largest tributary of Mahanadi River. The river flows in the state of Chhattisgarh. It joins Mahanadi River near Shiladehi a village in Janjgir-Champa district. Minimata Dam which commonly known as Hasdeo Bango Dam is constructed across this river near Bango village. The river originates about 910.0 m above sea level, in a place about 10.0 km from Sonhat in Koriya district. The total length of the river is 333.0 km, and drainage area is 9856 km². The major tributary of Hasdeo River is Gej River and other tributary rivers are Taan, Ooteng, Chornai, Jhing. The river flows through the Hasdeo Arand forest.