615 ILCS 100/4

The Department of Natural Resources shall have authority: (1) To prescribe reasonable rules and regulations in respect to all matters connected with the navigation and use of the said dam, lock and fishway, and transportation on or through said lock. Whoever shall wilfully or negligently refuse or neglect to comply with such rules may be fined in any sum not exceeding fifty dollars ($50) for each offense, to be recovered in the name of the People of the State of Illinois, before any justice of the peace in the county, and paid over to the Department for credit to a fund for the operation and maintenance of said lock and dam at McHenry. The Department of Natural Resources may prohibit all persons who wilfully refuse or neglect to comply with such rules from using said dam and lock. Printed copies of such rules and of this article shall be posted for public inspection at the lock. The power granted in this article shall apply as well to that part of the Fox River above and below the dam and lock within one thousand feet thereof. (2) To do all work in the Fox River north of said dam and lock necessary to remove obstructions and maintain a navigable depth which otherwise would necessitate a further raising of the dam in order to comply with Section 2, paragraph 2, of this Act. (3) To establish and collect reasonable rates of toll for the passage and use of the said lock and the river and lakes north of said lock, but such lock, river and lakes shall be free for the transportation of any property of the United States or persons in the service thereof passing through the same. (Source: P.A. 89-445, eff. 2-7-96.)