These Dam Safety Guidelines are intended to be an overarching document for dam safety management of hydropower in Bhutan. They apply to dams that are in the development phase as well as dams in operation. They are also applicable for dams intended for purposes other than for hydropower. The Guidelines consist of three modules: 1. Dam Safety Management; 2. Investigation, Design and Construction; and 3. Dam Safety Performance. Module 1 describes the principles and performance criteria fundamental to dam safety. Module 2 provides an overview of the important dam safety considerations during the development and first reservoir filling phases of the dam life cycle. Module 3 covers dam safety practices in operations, maintenance and emergency management; i.e. the operational phase after first reservoir filling.