Location:- It is situated near Mandan, North Dakota
It was first discovered in 1949.
It is joined by the Green River at Gladstone, and turns east-southeastward into Grant County, passing through Lake Tschida, which is formed by the Heart Butte Dam. Below this dam, the river turns northeastward into Morton County, where it joins the Missouri at Mandan.(lines copied by wikipidia.org)