33 U.S.C. § 42 : US Code - Section 42: Platte River, Missouri

Search 33 U.S.C. § 42 : US Code - Section 42: Platte River, Missouri

The Platte River in the State of Missouri is declared to be a
nonnavigable stream within the meaning of the Constitution and laws
of the United States, and jurisdiction over said river is declared
to be vested in the State of Missouri.
The right of Congress to alter, amend, or repeal this section is
expressly reserved.