 However, the federal government participated in that lawsuit only as amicus, and did not consider itself bound by that decision because it did not participate in the litigation.The United States was a party in United States v. Bennett County, 394 F.2d 8 (8th Cir.1968), in which the State of South Dakota had to obtain permission from the Department of Interior in order to fix roads or condemn property in Bennett County, consistent with the property's reservation status.