Quick search by citation:

33 U.S. Code § 29a - East River, Wisconsin

All of that portion of the East River, in the county of Brown, State of Wisconsin, extending from Baird Street, in the city of Green Bay, east and south is declared to be a nonnavigable stream within the meaning of the Constitution and Laws of the United States of America.

The right of Congress to alter, amend or repeal this section is expressly reserved.

(Aug. 30, 1935, ch. 831, § 9, 49 Stat. 1048.)