70 ILCS 1505/26.2

The Chicago Park District, bordering upon public waters, has the power to acquire, construct, replace, enlarge, improve, maintain and operate a harbor for recreational use and benefit of the public anywhere within the jurisdiction of the Chicago Park District, or in, over, and upon public waters bordering thereon, subject to the approval of the Department of Natural Resources of the State of Illinois and approval of the proper officials of the United States Government.