Uihlein, also known as Maple Spring and Ryan, is a privately owned dam located in Ashland, Wisconsin. Built in 1974, this earth-type dam stands at 18 feet high and serves primarily for recreational purposes. With a normal storage capacity of 49 acre-feet and a maximum storage of 103 acre-feet, Uihlein is situated on TR Trout Brook within the St. Paul District.

Despite being categorized as low hazard potential and fair condition assessment, Uihlein is subject to state regulation, inspection, and enforcement by the Wisconsin Department of Natural Resources. The dam's moderate risk assessment indicates a potential for issues that may require management measures in the future. With an uncontrolled spillway and a drainage area of 0.2 square miles, Uihlein offers a glimpse into the delicate balance between water resource management and recreational use in the region.

Enthusiasts of water resources and climate will find Uihlein to be an intriguing case study, showcasing the intersection of recreational infrastructure, environmental regulations, and risk assessment. As a privately owned structure, Uihlein presents unique challenges and opportunities for sustainable management practices. Its location in Ashland, Wisconsin, along with its historical significance and potential impact on the surrounding ecosystem, make Uihlein a focal point for those interested in the intricate relationship between water resources and human activities in the region.