A spillway is a structure used to manage water flow from a dam or levee. Its primary purpose is to safely release excess water, preventing overflow and potential flooding. Spillways are designed to direct water away from the dam and into a river or reservoir, ensuring the stability of the structure. There are different types of spillways, including overflow spillways, side-channel spillways, and chute spillways. Each type is engineered to handle varying amounts of water and is crucial for maintaining the safety and functionality of water management systems, especially during heavy rainfall or snowmelt.