The ISGS has prepared this publication in order to provide information to Illinois homeowners concerned with or experiencing subsidence problems associated with past mining activity. Common damages and problems associated with subsidence are described. Some information  is included about problems frequently mistaken as being related to subsidence. Detailed advice is provided as to what to do when subsidence problems are suspected and what help is available for property owners faced with these kinds of problems. Links are provided to other mine information such as maps that will assist the prospective property developer or buyer to avoid known mined-out areas and subsidence problems.