"Contemporary Topics in Ground Modification, Problem Soils, and Geo-Support" contains 78 peer-reviewed papers presented at the International Foundations Congress and Equipment Expo in Orlando, Florida, from March 15 to 19, 2009. This Geotechnical Special Publication combines the 2009 annual meetings of the Geo-Institute of ASCE, the International Association of Foundation Drilling, and the Pile Driving Contractors Association. This proceedings covers technological advances, case histories, present challenges related to foundations, ground support, and earth retention. Topics discussed include: earth-retaining structures; ground improvement; geosynthetics; pavements and sub grade issues; shallow foundations; landfill issues and foundations in waste; and foundations in problem soils. This publication will be invaluable to geotechnical professors and students, design engineers, contractors, geotechnologists, and others involved in geotechnical engineering.