Charlestown Twp 28, located in SANBORN, Minnesota, is a privately owned earth dam completed in 2015 with a primary purpose of Flood Risk Reduction along the COTTONWOOD RIVER-TR. Designed by Duane Hansel, P.E., this dam stands at a height of 29 feet and has a hydraulic height of 13 feet, providing a storage capacity of 79 acre-feet. The dam is regulated by the Minnesota Department of Natural Resources and undergoes regular inspections to ensure its satisfactory condition and low hazard potential.

The dam's uncontrolled spillway and outlet gates contribute to its flood risk reduction capabilities, with a drainage area of 1.62 square miles. Despite its moderate risk assessment, Charlestown Twp 28 has not required any major modifications since its completion, highlighting its effective design and construction. With Collin Peterson (D) as the Congressional representative for the area, the dam plays a crucial role in mitigating flood risks and protecting the surrounding Redwood County community.

Overall, Charlestown Twp 28 serves as a vital infrastructure for managing floodwaters and ensuring the safety of residents in the region. Its satisfactory condition, regular inspections, and low hazard potential underscore its importance in the local water resource and climate resilience efforts. As a key component of flood risk reduction along the COTTONWOOD RIVER-TR, this privately owned dam stands as a testament to effective engineering and regulatory oversight in safeguarding communities from potential water-related disasters.