This proceedings contains 306 papers presented at the 27th International Conference on Coastal Engineering held in Sydney, Australia, July 16-21, 2000. This proceedings is divided into five parts: characteristics of coastal waves and currents; long period waves, storm surges, and wave groups; coastal structures; coastal processes and sediment transport; and coastal, estuarine, and environmental problems. Topics covered include the effects of wind, waves, storms, and currents as well as the study of sedimentation, erosion, and beach nourishment. Case studies of completed engineering projects and keynote addresses are also presented. With the inclusion of both theoretical and practical information, these papers provide the civil engineer and professionals in related fields with a broad range of information on coastal engineering and coastal processes affecting design and operations in the coastal zone.