55 ILCS 5/5-1049
A county board may accept or receive through gift, grant, legacy, dedication in plats of subdivision or otherwise, parks, playgrounds, areas enclosing flood plains, floodwater runoff channels and detention ponds or basins, and other public grounds and easements located in the unincorporated part of the county and not accepted by a municipality, park district or other public agency; may hold and maintain such grounds and lands; may supervise or regulate their use for any proper public purpose; and may enact ordinances or resolutions to provide for monetary relief for damages caused by filling or dumping into areas enclosing floodplains, floodwater runoff channels or detention ponds or basins. Monetary relief for such damages shall be based on the cost of removing soil, debris, rubbish or any other material from the floodplain, floodwater runoff channel or detention pond or basin.
55 ILCS 5/5-1049