Pleasant Valley No. 6, also known as S. Girtler Detention, is a privately owned earth dam located in Winona, Minnesota. Built in 1968 by the USDA NRCS, this dam serves as a crucial flood risk reduction structure along Pleasant Valley Creek. With a height of 28 feet and a length of 320 feet, the dam has a storage capacity of 20 acre-feet and a maximum discharge of 120 cubic feet per second.

Despite its low hazard potential, Pleasant Valley No. 6 plays a significant role in managing flood risks in the area. The dam's uncontrolled spillway allows for excess water to flow out safely, reducing the likelihood of downstream flooding. While the condition of the dam is currently not rated, its risk assessment is moderate, indicating the need for ongoing monitoring and maintenance to ensure its effectiveness in protecting the surrounding community.

For water resource and climate enthusiasts, Pleasant Valley No. 6 offers a fascinating example of how infrastructure like dams can be instrumental in mitigating flood risks and managing water resources. As part of the St. Paul District, this dam exemplifies the collaboration between government agencies and private owners in safeguarding communities from the impacts of extreme weather events. With its historical significance and functional design, Pleasant Valley No. 6 stands as a testament to the importance of proactive water management in a changing climate.