Nelson is a state-regulated dam located in Springerville, Apache County, Arizona. Built in 1890 for irrigation purposes, the dam's primary source agency is the Arizona Department of Water Resources. It stands at a height of 34 feet with a hydraulic height of 34 feet, serving the Nutrioso Creek with a storage capacity of 900 acre-feet and a normal storage of 770 acre-feet. The dam spans 335 feet in length and covers a surface area of 101 acres, with a maximum discharge capacity of 2200 cubic feet per second.

With a low hazard potential and a moderate risk assessment rating of 3, Nelson dam is not currently rated for condition assessment. The dam features an uncontrolled spillway with a width of 58 feet and has a inspection frequency of 5 years. The surrounding area is at a moderate risk level, indicating a need for ongoing risk management measures. Although the dam has not been modified in recent years, it remains under the jurisdiction of the state and is subject to regular inspections and enforcement by the Arizona Department of Water Resources to ensure its safety and functionality for irrigation and recreation purposes.