Frd No 13, also known as Upper Walnut WS Joint District No 33, is a flood risk reduction structure located in El Dorado, Kansas. Built in 1976 by the USDA NRCS, this earth dam stands at a height of 29 feet and has a storage capacity of 1365.71 acre-feet. Its primary purpose is flood risk reduction, serving the West Branch Walnut River-TR.

This dam, with a low hazard potential and moderate risk assessment rating, is regulated and permitted by the Kansas Department of Agriculture. Despite its condition being "Not Rated," Frd No 13 plays a crucial role in mitigating flood risks in the area. With its uncontrolled spillway and a surface area of 14.51 acres, this structure is essential for protecting the surrounding community from potential water-related disasters.

For water resource and climate enthusiasts, Frd No 13 serves as a prime example of human intervention in managing water resources and mitigating flood risks. Its construction and operation highlight the importance of infrastructure in safeguarding communities against natural disasters. As climate change continues to pose challenges, structures like Frd No 13 become even more integral in ensuring the resilience of our water systems and the safety of our environment.