Luna is a private irrigation structure located on the San Francisco River in Apache, Arizona. Built in 1911 by the USDA NRCS, Luna serves the primary purpose of irrigation and also supports recreation. This Earth type dam stands at 27 feet high, with a length of 292 feet and a storage capacity of 1800 acre-feet. The dam has a spillway width of 120 feet and is regulated by the Arizona Department of Water Resources.

Despite its age, Luna Dam remains in satisfactory condition with a significant hazard potential. Regular inspections are conducted, with the last assessment taking place in June 2019. The dam meets regulatory guidelines and has an emergency action plan in place to manage any potential risks. With a moderate risk assessment score of 3, Luna Dam is a crucial water resource structure in the region, ensuring water availability for irrigation and enhancing recreational opportunities for the community.