Coolidge is a federal irrigation dam located on the Gila River in Hayden, Arizona. Built in 1931 by the Bureau of Indian Affairs, this concrete dam stands at a structural height of 250 feet and has a length of 920 feet. Its primary purpose is to provide irrigation water for the surrounding area, with a storage capacity of 912,500 acre-feet.

Despite its age, Coolidge remains a vital resource for water management in the region. It is classified as having a high hazard potential and a very high risk level, emphasizing the importance of regular inspections and maintenance. The dam is operated by the Bureau of Indian Affairs and does not fall under state jurisdiction for regulation, permitting, or inspection.

Coolidge serves as a key infrastructure for water supply in the Gila River area, highlighting the intersection of water resources and climate management. Its historical significance and ongoing role in irrigation underscore the importance of sustainable water practices for both the environment and local communities.