70 ILCS 2605/8a
The Sanitary District, in addition to the other powers vested in it, is empowered, with the approval of the Department of Natural Resources as successor to the Department of Transportation and the Department of Purchases and Construction of the State of Illinois, through its Director, to remise, release, quit claim, grant, convey and transfer all its right, title and interest in and to any and all lands, tenements and hereditaments and in and to any and all property, including structures, of every kind and nature or rights to or in, under, over and adjoining the Main Channel, Main Channel Extension, Calumet-Sag Channel and the North Shore Channel of the Sanitary District and for improvements made by the Sanitary District in, under, over and adjoining the Chicago River, the Calumet River, the Des Plaines River and tributaries thereto, and any and all other land, property or structures of the Sanitary District, to the United States of America, the State of Illinois, the County of Cook or/and any Municipal Corporation, upon such terms as may be mutually agreed upon by the Sanitary District and the United States of America, the State of Illinois, the County of Cook or/and any Municipal Corporation; and the Board of Trustees of the Sanitary District is empowered to and may authorize the doing of all things and acts, and the execution of such documents and instruments and adopt such resolutions and ordinances in connection therewith that may be required, and the provisions of this Section 8a shall constitute complete authority for the performance of all acts herein provided without reference to other laws and shall be construed as conferring powers in addition to, but not limiting, powers granted under other existing laws.
The proceeds derived from any such sale or transfer to the United States of America shall, unless Congress shall otherwise provide, be used only for paying the costs of controlling works in the Chicago River, the completion, construction and enlargement of sewage treatment works, and additions therefor, pumping stations, tunnels, conduits and intercepting sewers connecting therewith, and outlet sewers, together with the equipment and appurtenances necessary thereto, and for the acquisition of the sites and rights of way necessary thereto, and for engineering expenses for designing and supervising the construction of the works above described, which works are made necessary by the decree of the Supreme Court of the United States in the consolidated cases entitled "Wisconsin et al. v. The State of Illinois and The Sanitary District of Chicago", numbers 7, 11 and 12 original. Any excess of the proceeds, not required for the cost of construction of the works made necessary by the decree, may be used for the construction of sewage disposal plants and equipment thereof, pumping stations, and intercepting sewers and appurtenances thereto, the acquisition of sites and easements therefor and the expense of design and supervision of the construction thereof.
70 ILCS 2605/8a