Neb. Rev. Stat. §§ 22-122
The county of Dakota is bounded as follows: Commencing at the most westerly point where the township line between townships twenty-nine and thirty, north, intersects the state boundary line between the State of Nebraska and the State of South Dakota; thence west along said line to the northwest corner of section three, township twenty-nine, north, range six, east; thence south by section lines to the north line of Thurston County; thence east along the north line of Thurston County to the eastern boundary line of the State of Nebraska as established by the Iowa-Nebraska Boundary Compact of 1943; thence northerly along said state boundary line to the point where said boundary line is intersected by the east boundary line of the State of South Dakota; and thence westerly along the middle of the main channel of the Missouri River to the place of beginning.
Neb. Rev. Stat. §§ 22-122