There is a Federal Law, that has been on the books since the ratification of the U.S. Constitution, has to do with public right of ways for commerce. Rivers in the early days was the protected for all to use, long before Railroads, or State and National Highways.
Nobody can claim ownership to any portion of the water system of the USA, the high water mark on the river or lake are the the boundary line for free transport, even if a person own property on both sides of of the river or stream. All of these waters are own by the people of the United States, and regulated by the Federal, State, Counties & Municipalities.
Rivers and the lakes on those rivers are part of the Nation's Transportation System. Nobody can file claim to a segment of any water system in the USA.
"Everyone you meet in life, give you happiness! Some by their arrival, others by their departure!" ~Parnelli