65 ILCS 5/11-123-9
2021 Illinois Compiled Statutes|Chapter 65 - MUNICIPALITIES|65 ILCS 5/ - Illinois Municipal Code.|Article 11 - Corporate Powers and Functions

 (from Ch. 24, par. 11-123-9)Sec. 11-123-9.         When any city or village and the owner or claimant  have agreed upon a boundary line as provided in Section 11-123-8, the  city or village shall commence a civil action in the circuit court of  the county in which the land is situated, praying that the boundary line  be established and confirmed by judgment of the court.  All persons  interested in the land as owners or otherwise, who appear of record, if  known, or if not known, upon stating the fact, shall be made parties  defendant.  Interested persons whose names are unknown may be made  parties defendant by the description of unknown owners, but in all cases  an affidavit shall be filed by or on behalf of the municipality, setting  forth that the names of these persons are unknown.The municipality shall publish notice of the commencement of the  action once a week for 3 consecutive weeks, in one or more newspapers  published in the municipality, or, if no newspaper is published therein,  then in one or more newspapers with a general circulation within the  municipality.  In municipalities with less than 500 population in which  no newspaper is published, publication may instead be made by posting a  notice in 3 prominent places within the municipality.  The notices shall  contain the title of the action and the return day at which the  defendants are to appear, and the last of the notices shall be published  not less than 10 nor more than 20 days before the return day.  The  defendants who do not enter their appearances shall be served with  process and the proceedings in the action shall be conducted in the same  manner as provided by the Civil Practice Law, as heretofore and  hereafter amended and the Supreme Court Rules, now or hereafter  adopted, in relation to that Law, except as otherwise provided in this  Division 123.If upon a hearing the court finds that the rights and interests of  the public have been duly conserved by the agreement, the court shall  confirm the agreement and establish the boundary line.  Otherwise the  court, in its discretion, shall dismiss the suit.  If the boundary line  agreed upon is so established and confirmed by a court judgment, it  shall be the permanent boundary line thereafter and shall not be  affected either by accretion or erosion.The establishment of such a boundary line operates as a conveyance  and release to the municipality of all the right, title, and interest of  owners to all land, property, and property rights, including riparian  rights, lying upon the outer or water side of the boundary line.  The  municipality is hereby granted by the State of Illinois the title to all  land, property, and property rights, including riparian rights, lying  upon the outer or water side of the boundary line when so established.  The owners of the shore land are hereby granted by the State of Illinois  the title to the adjacent, adjoining, submerged, or other land, whether  of natural or artificial formation, as specifically and particularly  described in the court judgment, lying upon the inner or land side of  the boundary line when so established.  These owners may fill in,  improve, protect, and use, sell, and convey this land lying upon the  inner or land side of the boundary line free from any adverse claim in  any way arising out of any question as to where the shore line was at  any time in the past, or as to the title to any existing accretions.    (Source: P.A. 82-783.)