Frd No 20, located in Butler County, Kansas, is a local government-owned earth dam designed by the USDA NRCS and completed in 1981 for flood risk reduction along the Walnut River. With a height of 23.5 feet and a length of 1700 feet, the dam has a storage capacity of 1153 acre-feet and serves a drainage area of 2.53 square miles. Despite being classified as having a low hazard potential and not yet rated for condition assessment, Frd No 20 plays a crucial role in mitigating flood risks in the area.

Managed by the Kansas Department of Agriculture, Frd No 20 is subject to state regulation, permitting, inspection, and enforcement. The dam's primary purpose is flood risk reduction, with a spillway width of 40 feet and a maximum discharge capacity of 950 cubic feet per second. While the dam does not have outlet gates or associated structures, it remains an important infrastructure asset in safeguarding the local community and surrounding areas from potential flooding events.

Even though Frd No 20 has not undergone recent inspections or been assessed for condition, its strategic location and design by the Natural Resources Conservation Service highlight its significance in water resource management and climate resilience efforts. As climate change continues to impact precipitation patterns and intensify extreme weather events, structures like Frd No 20 are essential in maintaining the safety and well-being of communities that rely on effective flood control measures along rivers and streams.