Greden Detention, located in MINNEISKA, Minnesota, along the TR-TROUT CREEK, is a private earth dam designed by USDA NRCS and completed in 1963 for the primary purpose of Flood Risk Reduction. This 25-foot high dam with a length of 258 feet has a normal storage capacity of 11 acre-feet and a maximum discharge of 45 cubic feet per second. Despite its low hazard potential, the dam has a moderate risk assessment rating of 3 due to its location and design.

Managed by the Natural Resources Conservation Service, Greden Detention serves as a crucial infrastructure for mitigating flood risks in Winona County. Although not regulated or inspected by the state, the dam's structural integrity and overall condition remain unrated. With an uncontrolled spillway and outlet gates, the dam's emergency action plan and risk management measures are currently not assessed or updated, leaving room for improvement in ensuring the safety and efficiency of this vital water resource.

Overall, Greden Detention represents a significant asset for flood control efforts in the area, providing essential protection to the surrounding community. As climate change continues to impact water resources and exacerbate flooding events, the proper maintenance and evaluation of structures like Greden Detention will be crucial in safeguarding lives and property from potential disasters. Collaborative efforts between federal agencies, local authorities, and private owners are essential to ensure the resilience and effectiveness of such critical infrastructure in the face of evolving climate challenges.