Located in Congress, Arizona, Billingsley #3 is a privately owned earth dam designed by USDA NRCS for irrigation purposes. Completed in 1954, the dam stands at a height of 23 feet and has a storage capacity of 450 acre-feet, with a normal storage level of 350 acre-feet. The dam spans a length of 550 feet and is situated on Martinez Creek in Yavapai County.

The dam is regulated by the Arizona Department of Water Resources and undergoes regular state inspections, with a hazard potential rated as low. Despite being classified as moderate risk, the dam has not been assessed for its current condition, posing potential challenges for risk management. However, with uncontrolled spillways and outlet gates, Billingsley #3 remains a crucial piece of infrastructure for irrigation in the region.

In addition to its irrigation purposes, Billingsley #3 also serves as a point of interest for water resource and climate enthusiasts due to its location in an environmentally significant area. With its stone core and soil foundation, the dam represents a blend of traditional and modern engineering techniques, showcasing the intersection of human ingenuity with natural landscapes.