Green Valley Park, located in Payson, Arizona, is a local government-owned recreational area with a primary purpose of providing leisure opportunities for the community. The park features an Earth-type dam on the American Gulch river, completed in 1995, with a height of 13 feet and a length of 1005 feet, creating a reservoir with a storage capacity of 180 acre-feet. The park offers activities such as fishing, picnicking, and hiking in a scenic setting surrounded by nature.

Managed by the Arizona Department of Water Resources, Green Valley Park is subject to state regulations, inspections, and enforcement to ensure its safety and functionality. With a high hazard potential but a satisfactory condition assessment, the dam is regularly inspected, with the last assessment conducted in March 2018. The park's spillway, which is uncontrolled and 450 feet wide, serves to manage maximum discharge rates of up to 9000 cubic feet per second, protecting downstream areas from flooding risks.

Despite its moderate risk assessment, Green Valley Park remains a popular destination for water resource and climate enthusiasts seeking a peaceful getaway in Gila County, Arizona. With its well-maintained facilities, beautiful surroundings, and recreational opportunities, the park continues to attract visitors looking to enjoy the outdoors while appreciating the importance of responsible water management in a changing climate.