Arkansas Code
Subchapter 1 - General Provisions
§ 14-386-112. Navigable stream as lawful fence

Where the boundary of any fencing district shall lie along the bank of a navigable stream, and any other watercourse flows into the stream across the boundary with such force as to render it impracticable to maintain watergaps, the distance from bank to bank of the watercourse shall be deemed and held to be a good and lawful fence as part of the fence enclosing the district.