This publication provides introductory technical guidance for electrical engineers, mechanical engineers, civil engineers and other professional engineers, construction managers and power system operators interested in design and construction of hydroelectric power plants. Here is what is discussed: 1. INTRODUCTION, 2. POWER SYSTEM OPERATION, 3. TYPES OF HYDROPOWER PROJECTS, 4. COMPONENTS OF HYDRO PROJECTS, 5. COMPONENTS OF A POWERHOUSE, 6. TYPES OF TURBINES