Frd No. 4, located in Ottawa, Kansas, is a vital flood risk reduction structure managed by the local government with oversight from the Kansas Department of Agriculture. Designed by USDA NRCS, this earth dam stands at a height of 47.5 feet and spans 2000 feet along First Creek. With a storage capacity of 2927 acre-feet and a drainage area of 7.27 square miles, Frd No. 4 plays a crucial role in managing floodwaters and protecting the surrounding area from potential inundation.

Although last inspected in 1991, Frd No. 4 has a low hazard potential and is considered to be in moderate condition. Despite not being rated for its current state, the dam's spillway type is uncontrolled with a width of 100 feet to safely discharge excess water during peak flow events. The risk assessment for Frd No. 4 indicates a moderate risk level (3), prompting the need for continued monitoring and potential risk management measures to ensure its effectiveness in flood risk reduction for the community.

As a key piece of infrastructure in the region, Frd No. 4 serves as a critical component in safeguarding against flooding along First Creek. With state-regulated oversight and a primary purpose of flood risk reduction, this earth dam plays a significant role in protecting the residents and infrastructure of Ottawa, Kansas, from the impacts of extreme weather events and ensuring the overall resilience of the area against future climate challenges.