Wilmington Twp 3, also known as Rosie Stoltz 402, is a private dam located in Houston, Minnesota, along the Winnebago Creek. Constructed in 2011 by G-CUBED, this earth dam stands at a height of 18 feet and serves the primary purpose of flood risk reduction in the area. The dam has a storage capacity of 103 acre-feet and covers a drainage area of 1.3 square miles, providing essential protection to the surrounding region.

Managed by the Minnesota Department of Natural Resources, Wilmington Twp 3 has been deemed to have a low hazard potential with a satisfactory condition assessment as of the last inspection in May 2012. While the dam does not have spillways or locks, it fulfills its role effectively in mitigating flood risks and ensuring the safety of nearby residents. With state-regulated permitting, inspection, and enforcement in place, the dam remains a crucial asset for water resource management in the region.

Overall, Wilmington Twp 3 stands as a vital infrastructure asset in the flood-prone area of Camp Winnebago, offering protection, peace of mind, and effective flood risk reduction measures for the local community. Its strategic location, design, and regulatory oversight make it a noteworthy structure for water resource and climate enthusiasts interested in sustainable water management practices in Minnesota.