Mirage Flats Dam 3, located in Sheridan County, Nebraska, was completed in 1958 by the USDA NRCS and is privately owned. This earth dam stands at 30 feet tall and has a hydraulic height of 29 feet, with a total length of 540 feet. It serves multiple purposes, including flood risk reduction and other water resource management activities, with a normal storage capacity of 3 acre-feet and a drainage area of 7.4 square miles.

Managed by the Nebraska Department of Natural Resources, Mirage Flats Dam 3 is regulated, inspected, and enforced by state authorities to ensure its structural integrity and safety. With a significant hazard potential, the dam has been assessed to be in satisfactory condition as of the last inspection in June 2018. It is crucial for water resource and climate enthusiasts to monitor and support the maintenance of Mirage Flats Dam 3 to mitigate potential risks and ensure the sustainable management of water resources in the region.

The dam's location in the Sturgeon Drain watershed, within the jurisdiction of the Omaha District of the US Army Corps of Engineers, highlights its importance in managing water flow and preventing flooding in the area. With a maximum discharge capacity of 1,088 cubic feet per second, Mirage Flats Dam 3 plays a vital role in protecting surrounding communities and agricultural lands from potential water-related hazards. Its association with Adrian Smith (R), the Congressional representative for the area, further underscores the significance of this structure in water resource management and climate resilience efforts.