Gunderson-Marmsoler Detention, located in Winona, Minnesota, is a privately owned earth dam designed by the USDA NRCS for flood risk reduction. Completed in 1972, this structure stands at 34 feet tall and stretches 331 feet in length along the Big Trout Creek-TR. With a low hazard potential and satisfactory condition assessment, this detention facility has a storage capacity of 16.3 acre-feet and a drainage area of 0.5 square miles.

Maintained by the Minnesota Department of Natural Resources, this detention serves a critical role in mitigating flood risks in the region. With uncontrolled spillways and outlets, it is equipped to handle a maximum discharge of 160 cubic feet per second. The dam's risk assessment rates it as moderate, highlighting the importance of ongoing monitoring and risk management measures to ensure its effectiveness in protecting the surrounding areas from potential inundation events.

Owned by a private entity, Gunderson-Marmsoler Detention plays a vital role in the flood risk reduction efforts in the region. With its earth construction and buttress core type, this structure exemplifies the collaboration between private landowners and government agencies in safeguarding water resources and enhancing climate resilience. As climate change continues to impact water systems, facilities like Gunderson-Marmsoler Detention will be instrumental in adapting to and mitigating the challenges posed by a changing climate.