ABSTRACT
It is said that it took Plato ten books to provide a definition of Justice and even then the definition was only approximate. In the case of risk, and in particular, rock engineering risk, there is certainly enough material to fill ten books. However, our objective for this book is to present the salient information in reasonably compact form, including the relevant background material, current approaches to the subject, risks before and during construction, plus two major case examples of long, deep tunnels and hydropower cavern groups-with our Frontispiece flowchart providing the overall conceptual structure.
