Frd No 28, also known as Upper Walnut WS Joint District No 33, is a flood risk reduction structure located in Butler, Kansas. Constructed in 1977 by the USDA NRCS, this earth dam stands at a height of 35 feet and has a hydraulic height of 31 feet, serving the primary purpose of flood risk reduction along the Harrison Creek-TR river or stream. With a NID storage capacity of 1435.82 acre-feet and a normal storage capacity of 105 acre-feet, this dam plays a crucial role in managing water resources in the area.

Owned by the local government and regulated by the Kansas Department of Agriculture, Frd No 28 has a low hazard potential and is currently assessed as not rated in terms of condition. The dam has a spillway width of 60 feet and covers a surface area of 26.12 acres, with a drainage area of 3.94 square miles. While the structure has not been modified in recent years and lacks outlet gates, it is equipped to handle moderate risks according to a risk assessment rating of 3.

Despite its age, Frd No 28 continues to provide essential flood protection for the surrounding area. As a key component of water resource management in Butler, Kansas, this dam showcases the importance of sustainable infrastructure in mitigating climate-related risks and ensuring the safety of local communities. With ongoing state inspections and enforcement measures in place, this earth dam remains a critical asset for safeguarding against potential flooding events in the region.