Mound Plant, located in St. Croix, Wisconsin, is a state-regulated dam with a primary purpose of recreation. Built in 1925, this multi-arch dam stands at a height of 58 feet and has a hydraulic height of 44 feet. With a storage capacity of 770 acre-feet, the dam serves to control the flow of the Willow River and covers a surface area of 57 acres.

The dam's hazard potential is rated as high, with a moderate risk assessment score of 3. While its condition assessment is currently not rated, the dam undergoes inspections every two years to ensure its structural integrity and safety. Despite its risk level, the dam has not been modified in recent years and lacks an emergency action plan.

Owned by the state of Wisconsin and under the regulatory oversight of the WIDNR, Mound Plant is a significant asset for recreational activities in the area. With its historical significance and vital role in water resource management, the dam continues to be a focal point for water resource and climate enthusiasts interested in understanding the intersection of infrastructure, recreation, and environmental sustainability.