Wisconsin Statutes State Sovereignty, Jurisdiction and Divisions (Ch. 1 to 4) § 2.03. Jurisdiction of counties on boundary streams

Whenever 2 counties are separated from each other by a river or a creek, the middle of the main channel of such river or creek shall be the division line between them, unless otherwise provided in the description of the boundaries of such counties. The counties so separated shall have common jurisdiction of all offenses committed on the waters between them, and all writs and process issued in any such county may be executed at any place on the waters of such river or creek opposite the county from which it was issued.