Dd No 5-31a (Vermillion Creek) is a crucial local government-owned dam in Marshall, Kansas, designed by King Engineering for flood risk reduction along the Roubidoux Creek. Completed in 2001, this earth dam stands at a height of 39.7 feet and has a storage capacity of 385 acre-feet, serving the primary purposes of debris control and flood risk reduction. With a low hazard potential and a moderate risk assessment rating, this dam plays a vital role in protecting the surrounding area from potential flooding events.

Despite being uncontrolled, the dam features a spillway width of 80 feet and a surface area of 9.82 acres, with a normal storage capacity of 68.2 acre-feet. The dam's location at 31,2S, 9E positions it strategically to manage water flow and mitigate flood risks in the region. Regular state inspections by the Kansas Department of Agriculture ensure that the dam is maintained and operated effectively, contributing to the overall safety and well-being of the community.

Overall, Dd No 5-31a (Vermillion Creek) serves as a critical infrastructure piece in the water resource management system of Marshall, Kansas. With its low hazard potential and effective flood risk reduction capabilities, this dam plays a vital role in preserving the safety and security of the area, highlighting the importance of proactive water resource and climate management practices in safeguarding communities against natural disasters.