Dd No 31-3 is a vital flood risk reduction structure located in Nemaha, Kansas, along the Cedar Creek. Built in 1988, this earth dam stands at a height of 24.5 feet and has a maximum storage capacity of 505.29 acre-feet. With a normal storage capacity of 56.32 acre-feet and a drainage area of 1.17 square miles, this structure plays a crucial role in controlling debris and reducing flood risk in the region.

Managed by the local government and regulated by the Kansas Department of Agriculture, Dd No 31-3 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Despite its moderate risk level, this structure has not been assigned a Dam Safety Action Classification (DSAC) date, indicating a need for further risk assessment and management measures. With a spillway width of 70 feet and a maximum discharge of 2051 cubic feet per second, this dam is equipped to handle potential flood events and protect the surrounding community.

While Dd No 31-3 has not been inspected in recent years and lacks an Emergency Action Plan (EAP), its presence serves as a critical line of defense against flooding in the area. With the potential for future modifications and updates to enhance its efficiency and safety, this dam remains an essential component of water resource management and climate resilience efforts in Nemaha, Kansas.