Pleasant Valley No. 1, also known as Hundorf Pond, is a privately owned earth dam located in Winona, Minnesota, along Pleasant Valley Creek. Built in 1968 by the USDA NRCS, this dam serves the primary purpose of flood risk reduction in the area. With a height of 34 feet and a length of 470 feet, Pleasant Valley No. 1 has a storage capacity of 80.5 acre-feet and covers a surface area of 2.7 acres.

Managed by the Minnesota Department of Natural Resources, this dam is state regulated, permitted, inspected, and enforced to ensure its structural integrity and safety. Despite being classified as having a significant hazard potential, the condition assessment of Pleasant Valley No. 1 is deemed satisfactory as of April 2015. The dam has an uncontrolled spillway and outlet gates, with a maximum discharge capacity of 1123 cubic feet per second.

With a moderate risk rating, Pleasant Valley No. 1 remains a crucial asset for flood risk management in the region. Its design and construction by the USDA NRCS reflect a commitment to safeguarding water resources and mitigating the impacts of climate change on the local landscape. The dam's role in protecting the surrounding community underscores the importance of sustainable water resource management practices in maintaining a resilient infrastructure for future generations.