Woolen Mill, located in Myra, Wisconsin, is a gravity dam completed in 1913 for recreational purposes along the Milwaukee River. With a height of 18 feet and a length of 350 feet, the dam has a storage capacity of 630 acre-feet and serves a drainage area of 222 square miles. While the dam has a low hazard potential, it is considered to have a very high risk due to its age and condition, which is currently not rated.

Managed by the local government and regulated by the Wisconsin Department of Natural Resources, Woolen Mill dam undergoes regular inspections every 10 years to ensure its safety and functionality. Despite its age, the dam continues to provide valuable recreation opportunities and contributes to the overall water resource management in the region. Enthusiasts of water resources and climate will find Woolen Mill dam an intriguing piece of infrastructure that highlights the intersection of human development and environmental conservation in Wisconsin.