Based on the author's extensive expertise and experience as an engineer of hydromechanical projects, this book describes the principal aspects of the design, manufacture, installation and operation of hydraulic gates. Specific topics are analysed in depth, such as the selection of the gate type, the limits of their use, estimating their weight, operative forces, hoisting systems, design of structure and support elements, seals and hydrostatic and hydrodynamic forces. The use of recent technological advances, such as inflatable gates and fusegates is discussed. The book can be used as a text-book and manual for the design of gates.  It features a number of worked examples, drawings and about 300 photographs to illustrate the concepts and methods involved, and covers several different types of gate and their support elements from a variety of applications.