615 ILCS 75/1
The Department of Natural Resources may independently engage in, or may make agreements with any agency of the United States, any municipality or political subdivision of this State or any public or private corporation, person or association for, the formulation of plans, acquisition of rights of way, and the construction, operation and maintenance of any navigation, flood control, drainage, levee, water supply and water storage, including regulation, distribution and use, and other water resource improvements and facilities in connection with the development of the Kaskaskia River watershed, including restriction of use or withdrawal of water from the Kaskaskia River below Carlyle Dam or providing for replenishment of withdrawn water, provided however, the Department shall not charge for the use or withdrawal of water from the Kaskaskia River, except that the Department may recoup from water users an amount required to pay federal operation and maintenance charges incurred as a result of water withdrawal from Lake Shelbyville and Carlyle Lake.
The Department, on behalf of the State of Illinois as local sponsor for federally authorized and developed Kaskaskia River basin projects, shall have jurisdiction and supervision over any and all phases of developments and improvements in such basin, including, but not limited to nonfederal participation requirements in connection therewith, and full authority and control over any and all lands acquired in connection with the development of the Kaskaskia River watershed and may, in the discretion of the Department, grant easements, lease for a period not to exceed 50 years, sell, transfer or convey, exchange, develop, or otherwise utilize such lands in the interest of the State of Illinois insofar as the same is not inconsistent or in conflict with the purpose for which acquired by the Department.
615 ILCS 75/1