70 ILCS 1801/90
It is unlawful to make any fill or deposit of rock, earth, sand, or other material, or any refuse matter of any kind or description, or build or commence the building of any wharf, pier, dolphin, boom, weir, breakwater, bulkhead, jetty, bridge, or other structure over, under, or within 40 feet of any navigable waters within the Port District without first submitting the plans, profiles, and specifications therefor, and other data and information as may be required, to the Port District and receiving a permit. Any person, corporation, company, municipality, or other agency, that does any of the things prohibited in this Section, without securing a permit as provided in this Section, shall be guilty of a Class A misdemeanor; provided, however, that no such permit shall be required in the case of any project for which a permit shall have been secured from a proper governmental agency prior to the creation of the Port District nor shall any such permit be required in the case of any project to be undertaken by any city, village, or incorporated town in the District, or any combination thereof, for which a permit is required from a governmental agency other than the District before the municipality can proceed with such project. And in such event, such municipalities, or any of them, shall give at least 10 days' notice to the District of the application for a permit for any such project from a governmental agency other than the District so that the District may be present and represent its position relative to the application before the other governmental agency. Any structure, fill, or deposit erected or made in any of the public bodies of water within the Port District, in violation of the provisions of this Section, is a purpresture and may be abated as such at the expense of the person, corporation, company, municipality, or other agency responsible. If in the discretion of the Port District it is decided that the structure, fill, or deposit may remain, the Port District may fix any rule, regulation, requirement, restrictions, or rentals or require and compel any changes, modifications, and repairs as shall be necessary to protect the interest of the Port District.
70 ILCS 1801/90