High-altitude reservoirs are dams built in mountain leisure resorts to create a water reserve in order to provide artificial snow, drinking water, irrigation water, etc. Due to the location of these reservoirs, there are numerous very specific technical, regulatory, environmental and public safety issues. This book, a real integrated guide, sets out the rules in terms of the design, building and surveillance. It answers questions concerning how to assess sites, analyse natural and technological hazards and study flood waves. Lastly, it provides decision-support elements for reservoir owners and their advisors concerning the organization of such projects.