Patra No. 3, located in HULETT, Wyoming, along the S PRONG CABALLO river, is a private earth dam completed in 1925 for fire protection, stock, and small fish pond purposes. The dam stands at 24 feet high with a hydraulic height of 20 feet and a length of 1092 feet, providing a storage capacity of 291 acre-feet. Despite its low hazard potential, the dam's condition assessment in 2018 reported a poor rating, indicating potential concerns for its structural integrity.

The dam features an uncontrolled spillway with a width of 185 feet and no outlet gates. While it has a moderate risk rating, with a risk assessment score of 3, the dam is not regulated by federal agencies but falls under Wyoming's state jurisdiction, with permitting, inspection, and enforcement conducted by the State Engineer's Office. The last inspection in 2018 revealed the dam's poor condition, raising concerns about its long-term sustainability and the need for potential risk management measures to ensure the safety of the surrounding community and environment.