Under Nebraska law, establishment of boundaries and the thread of the river is not based on the “Geographical Center Line” unless agreed by the parties. Cofer v. Kuhlmann, 214 Neb. 341, 33 N.W.2d 905 (1983).
“The thread or center of a channel, as the term is above employed, must be the line which would give to the owners on either side access to the water, whatever its stage might be, and particularly at its lowest flow.” Hardt v. Orr, 142 Neb. 460, 6 N.W.2d 589 (1942); Higgins v. Adelson, 131 Neb. 820, 270 N.W. 502 (1936).