Encompassing nearly all aspects of rock mass classifications in detail, this book provides construction engineers with much-needed methods for gathering and analyzing the essential data that forms the cornerstone for any construction project. This book features descriptions of projects in the Himalayas and other parts of the world under complex geological conditions. The goal is to use effective mapping techniques to obtain data that can be used as input for any established rock classification system. The authors cover all commonly used classification methods, including Barton's Q and Q systems, Bieniawski's RMR, Laubscher's MRMR, and Hoek's GSI system. With the details here, civil and geotechnical engineers will be able to gather geotechnical data from either rock cuts, drifts, or cores. This will create a guide that will allow engineers to relate the rock conditions at one site to the conditions encountered at others.