33 U.S.C. § 8 : US Code - Section 8: Toll free rivers in Alabama

Search 33 U.S.C. § 8 : US Code - Section 8: Toll free rivers in Alabama

The Tennessee, Coosa, Cahawba, and Black Warrior Rivers, within
the State of Alabama, shall be forever free from toll for all
property belonging to the United States, and for all persons in
their service, and for all citizens of the United States, except as
to such tolls as may be allowed by Act of Congress.