Introductory technical guidance for mechanical and civil engineers and lock and dam operators interested in hydraulic operators for dams and locks. Here is what is discussed:1. DESCRIPTION AND APPLICATION2. HYDRAULIC SYSTEMS3. COMPONENT PARAMETERS4. HYDRAULIC CYLINDERS5. HYDRAULIC MOTORS6. HYDRAULIC PUMPS7. CONTROL VALVES8. RESERVOIRS9. MANIFOLDS10. FILTERS11. ACCUMULATORS12. PIPING13. HYDRAULIC FLUID14. GAUGES15. SPECIAL DESIGN CONSIDERATIONS AND LESSONS LEARNED16. POSITION MEASURING SYSTEMS.