The Proceedings of the Symposium at World Water Day, 2001 presents a discussion of dams and dikes. Various speakers considered the benefits and drawbacks of dams, and there was discussion about why it is that people are against dams in specific situations, and how such situations may be resolved. Solutions are suggested to such controversies. These proceedings contain the full text of the presentations. They will be a useful resource for decision-makers and planners of future projects. This work highlights the international nature of these important hydraulic engineering strucures and both their technology and social implications.