The Crow Creek site, designated 39BF11 under the Smithsonian site numbering system, is located along the Missouri River in central South Dakota. The site is located on lands now under the control of the US Army Corps of Engineers due to its flood control and other projects on the river. It is surrounded by the territory of the Crow Creek Indian Reservation. The descendants of the people of the Middle Missouri and Central Plains/Initial Coalescent cultures now live in North Dakota as the Mandan and Arikara nations, respectively, of the Three Affiliated Tribes (together with the Hidatsa).