Udall is a privately owned dam located in Apache County, Arizona, along the Little Colorado River. Built in 1910, this earth dam stands at a height of 24 feet and stretches 423 feet in length, with a storage capacity of 5,000 acre-feet. Its primary purpose is for debris control and irrigation, serving the local community of Hunt. Despite its age, Udall has a low hazard potential and is currently classified as "Not Rated" in terms of its condition assessment.

Managed by the Arizona Department of Water Resources, Udall is subject to state regulation, permitting, inspection, and enforcement. The dam has a drainage area of 2,300 square miles and a maximum discharge capacity of 500 cubic feet per second. While the dam's spillway is uncontrolled with a width of 39 feet, its risk assessment is deemed moderate. The last inspection of Udall took place in June 2006, with an assigned inspection frequency of 5 years.

For water resource and climate enthusiasts, Udall presents an interesting case study of a historic dam that continues to play a vital role in local water management. With its low hazard potential and moderate risk assessment, Udall serves as a reminder of the importance of ongoing monitoring and maintenance of aging infrastructure to ensure the safety and sustainability of our water resources.