river boundary

A natural boundary of lands in private ownership, the exact location of which must depend upon whether the title to the bed of the river is in the state or the riparian owners and the view taken in the particular jurisdiction concerning the ownership between high and low-water mark. 12 Am J2d Bound § 20. Sometimes a state boundary. Where statute makes a great river the common boundary between two states, it means only the well-defined and unmistakable stream, and does not also include the interlacing unnavigable water belts, streams, and streamlets which, in the level alluvial bottom lands through which the river flows, emerge here and there from such main body. Little v Green, 144 Iowa 492, 123 NW 367.