Indrapuri Barrage (also known as the Sone Barrage) is across the Sone River in Rohtas district. The Sone River originates near Amarkantak in Madhya Pradesh just east of the headwater of the Narmada River, and flows north- northwest through Madhya Pradesh state before turning sharply eastward where it encounters the southwest-northeast-running Kaimur Range. The Sone River parallels the Kaimur hills, flowing east-northeast through Uttar Pradesh, Jharkhand and Bihar states to join the Ganges just Near Maner, Patna.
