33 U.S.C. § 56

The portion of the tidewaters in the waterway in which is located Fort Point Channel and South Bay in the city of Boston, Massachusetts, lying above the easterly side of the highway bridge over Fort Point Channel at Dorchester Avenue in the city of Boston is declared to be a nonnavigable water of the United States within the meaning of the Constitution and laws of the United States. The right to alter, amend, or repeal this section is expressly reserved.