33 U.S.C. § 26a
The portion of the old channel of the Calumet River in sections eighteen and nineteen, township thirty-seven north, range fifteen east, of the third principal meridian, in Cook County, Illinois, which lies outside of the new channel lines established by the United States and shown on the map referred to in section 26 of this title, and which lies outside of the exterior limits of the turning basin to be established on said Calumet River in said sections, is abandoned as navigable water of the United States from and after the time when the United States shall have secured title to the land necessary for the establishment of the turning basin at some point, to be approved by the Chief of Engineers, between One hundred and thirteenth Street and One hundred and seventeenth Street in the city of Chicago.
33 U.S.C. § 26a