This publication provides introductory technical guidance e for civil engineers and other professional engineers, lock and dam operators, and construction managers interested in hydraulic design of lock culvert valves. Here is what is discussed: 1. INTRODUCTION 2. AIR IN CULVERT SYSTEMS 3. HOIST LOADS 4. VALVE SEALS 5. RECESSES FOR UNWATERING BULKHEADS 6. CAVITATION AT LOCK CULVERT VALVES.