Unless otherwise provided by local ordinance, a navigable stream running through a parcel of land does not, in and of itself, divide the parcel into 2 parcels if the parcel, on both sides of the stream, is owned by the same owner.
Wis. Stat. § 710.09
Navigable stream does not divide parcel
2013 a. 358.
Official source: Wisconsin State Legislature. Reproduced from public-domain Wisconsin statutes; confirm against the official source for the current text. Not legal advice.