The Gnirk Family Trust in Mauston, Wisconsin, is a privately owned earth dam constructed in 1969 for the primary purpose of flood risk reduction along the TR Brewer Creek. With a structural height of 27 feet and a length of 310 feet, the dam has a storage capacity of 25 acre-feet and a drainage area of 0.2 square miles. Despite being classified as low hazard potential, the dam is regularly inspected by the Wisconsin Department of Natural Resources and has a fair condition assessment as of October 2019.

Located in Juneau County, the Gnirk Family Trust dam plays a crucial role in managing water resources and minimizing the risk of flooding in the surrounding area. With a low hazard potential and a moderate risk assessment rating of 3, the dam provides essential flood protection for the community. In the event of an emergency, the dam's emergency action plan and inundation maps ensure that appropriate measures are in place to safeguard lives and property.

Managed by the private owners, the Gnirk Family Trust dam continues to be a vital infrastructure for flood risk reduction in Wisconsin. With its uncontrolled spillway and a maximum discharge of 180 cubic feet per second, the dam serves as a key component of the local water resource management system. Despite its age, the dam's condition remains fair, and regular inspections and maintenance uphold its functionality and reliability in protecting the community from potential flooding events.