This proceedings contains 62 peer reviewed papers presented at the Cold Regions Engineering 2009 conference held in Duluth, Minnesota, from August 31 to September 2, 2009. This book examines a variety of issues associated with cold regions engineering including: climate change, construction, frost action, green engineering, pavement, railroads, and sewage treatment facilities. The papers collected here analyze the latest topics in cold regions engineering from countries such as the United States, Canada, Russia, China, Denmark, Japan, and Iran. ""Cold Regions Engineering 2009"" will be valuable to engineers and practitioners involved in geotechnical engineering in cold regions.