Frd No 15, also known as Upper Walnut WS Joint District No 33, is a crucial flood risk reduction structure located in Butler County, Kansas. Owned by the local government and designed by the USDA NRCS, this earth dam stands at a height of 29 feet and was completed in 1979. With a normal storage capacity of 152 acre-feet and a maximum discharge of 1552 cubic feet per second, Frd No 15 plays a significant role in managing water resources in the area.

Managed by the Kansas Department of Agriculture, Frd No 15 is regulated, inspected, and enforced to ensure its structural integrity and functionality. The dam has a low hazard potential and is currently rated as 'Not Rated' in terms of condition assessment. While it has not undergone a recent inspection or assessment, the structure meets moderate risk management guidelines, highlighting its importance in mitigating potential flooding risks in the region.

Despite its uncontrolled spillway type and lack of outlet gates, Frd No 15 serves as a critical infrastructure to protect the surrounding areas from flooding events. With its strategic location on Cole Creek-TR and its primary purpose of flood risk reduction, this dam stands as a testament to the collaborative efforts between local government agencies and the USDA NRCS in safeguarding water resources and climate resilience in Butler County, Kansas.