Hansons, also known as Marsh-Miller, is a privately owned dam located in Eagleton, Wisconsin, along the O'Neil Creek. This gravity dam was completed in 1870 and primarily serves as a recreational site, offering opportunities for activities such as boating and fishing. With a height of 16 feet and a storage capacity of 4,000 acre-feet, Hansons dam covers a surface area of 436 acres and has a drainage area of 16 square miles.

Despite its age, Hansons dam has a low hazard potential and is considered to be in fair condition, with its last inspection conducted in August 2014. The dam has undergone modifications in 1949 and 2004, enhancing its overall safety and functionality. With a moderate risk assessment rating of 3, the dam is regulated and inspected by the Wisconsin Department of Natural Resources, ensuring its compliance with state permitting, inspection, and enforcement requirements.

For water resource and climate enthusiasts, Hansons dam presents a fascinating blend of historical significance and modern recreational utility. Its picturesque location, combined with its structural integrity and regulatory oversight, makes it a noteworthy example of responsible dam management in the state of Wisconsin. As a key feature along the O'Neil Creek, Hansons dam continues to provide both recreational enjoyment and essential water management functions for the surrounding area.