Signal Butte Flood Retention Structure (FRS) is a critical water management asset located in Maricopa County, Arizona, near the city of Apache Junction. Built in 1988 by the USDA NRCS, this earth dam serves the primary purpose of flood risk reduction along unnamed washes in the area. With a dam height of 22.4 feet and a structural height of 45 feet, Signal Butte FRS has a storage capacity of 2,822 acre-feet, a surface area of 140 acres, and can discharge a maximum of 2,450 cubic feet per second.

Managed by the Arizona Department of Water Resources, Signal Butte FRS is regulated, inspected, and enforced to ensure its structural integrity and operational effectiveness. The dam's spillway type is uncontrolled, with a width of 152 feet, and it poses a high hazard potential but is currently assessed to be in satisfactory condition. Despite being a man-made structure, the dam blends seamlessly with its surroundings, utilizing stone core types and rock and soil foundations to support its functions.

As part of flood risk management measures, Signal Butte FRS has an established inspection frequency and a moderate risk assessment level. While the dam has not been modified in recent years, its emergency action plan (EAP) status and inundation maps preparedness are not disclosed. Overall, this water resource infrastructure stands as a crucial component of the region's water management system, highlighting the importance of proactive monitoring and maintenance in safeguarding against potential hazards and ensuring water security for the surrounding community.