This publication provides introductory technical guidance for civil engineers and other professional engineers, facility maintenance managers and construction managers interested in inspection of steel hydraulic structures such as those associated with dams, locks and flood control facilities. Here is what is discussed: 1. CAUSES OF STRUCTURAL DETERIORATION 2. FRACTURE 3. FATIGUE 4. DESIGN DEFICIENCIES 5. FABRICATION DISCONTINUITIES 6. OPERATION AND MAINTENANCE 7. UNFORESEEN LOADING.