This publication provides introductory technical guidance for civil engineers, structural engineers and other professional engineers, construction managers and facilities maintenance staff interested in evaluation of concrete structures. Here is what is discussed: 1. INTRODUCTION, 2. REVIEW OF ENGINEERING DATA, 3. CONDITION SURVEY, 4. UNDERWATER INSPECTION, 5. LABORATORY INVESTIGATIONS, 6. NONDESTRUCTIVE TESTING, 7. STABILITY ANALYSIS, 8. DEFORMATION MONITORING, 9. CONCRETE SERVICE LIFE.