An ungated spillway is a type of water control structure used in dams and reservoirs. Unlike gated spillways, which have adjustable gates to control water flow, ungated spillways allow water to flow freely over a fixed crest. This design is often used in situations where precise water management is less critical. These spillways are typically designed to handle excess water during heavy rainfall or flooding. They help prevent overtopping of the dam by directing surplus water safely away from the structure. Commonly found in earthfill dams and concrete dams, ungated spillways are essential for maintaining the safety and integrity of water storage systems.