70 ILCS 1835/18
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 such other data and information as may be required, to the Port District and receiving a permit therefor; and any person, corporation, company, city or municipality or other agency, which shall do any of the things above prohibited, without securing a permit therefor as above provided, shall be guilty of a Class A misdemeanor. However, 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 District before the municipality can proceed with such project. In such event, the 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 such application before such 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 therefor, or if in the discretion of the Port District, it is decided that such structure, fill or deposit may remain, the Port District may fix such rule, regulation, requirement, restrictions, or rentals or require and compel such changes, modifications and repairs as shall be necessary to protect the interest of the Port District.
70 ILCS 1835/18