Glen Hills 3 is a crucial flood risk reduction structure located in St. Croix, Wisconsin, along the Blue Creek. Constructed in 1970 by the USDA NRCS, this earth dam stands at a height of 29.5 feet and has a maximum storage capacity of 274 acre-feet. With a fair condition assessment and low hazard potential, Glen Hills 3 serves multiple purposes including debris control, flood risk reduction, and recreation for the local community.

Managed by the Wisconsin Department of Natural Resources, Glen Hills 3 is regulated, inspected, and enforced to ensure its safety and functionality. The dam features an uncontrolled spillway and has a moderate risk assessment rating. Despite being modified in 2002, the structure continues to provide essential protection to the surrounding area, with a drainage area of 2.4 square miles and a maximum discharge capacity of 727 cubic feet per second. With a history of serving the community for over 50 years, Glen Hills 3 remains a vital component in the region's water resource and climate management efforts.