This book covers the description of, analysis of, and design for scour at bridge foundations. The central focus is the combination of old and new design methods into a comprehensive methodology for bridge-scour design. The book is based upon an extensive summary of existing research results and design experience, such material not being previously adequately collated. In addition, thirty-one detailed case studies of scour-induced bridge failure are presented to illustrate scour processes and engineering responses. Use of the proposed design methodology is demonstrated by application of the methodology to a variety of situations, including a number of the presented case studies.