Jeffers Upper, located in Prior Lake, Minnesota, is a recreational dam managed by the local government and designed by the USDA NRCS. The dam, completed in 1981, stands at a height of 10 feet with a length of 133 feet, providing a storage capacity of 321 acre-feet. Situated on the Minnesota River, the dam's primary purpose is for recreation, offering a surface area of 3 acres for activities such as boating and fishing.

Despite its low hazard potential and satisfactory condition assessment, Jeffers Upper is subject to state regulation and inspection by the Minnesota Department of Natural Resources. The dam features an uncontrolled spillway and outlet gates, with a moderate risk assessment rating of 3. The surrounding area of Scott County, Minnesota, benefits from this structure for water resource management and flood control along the Minnesota River.

Overall, Jeffers Upper serves as both a functional and recreational asset for the community, showcasing the importance of sustainable water resource management and climate resilience in the region. With its earth dam construction and stone core types, the dam exemplifies the collaboration between local government and federal agencies to ensure the safety and enjoyment of residents and visitors alike.