Gs Dd No 7-31a (Vermillion Creek) is a local government-owned earth dam located in Beattie, Kansas, specifically designed for flood risk reduction along the Robidoux Creek. Constructed in 1994 by King Engineering & Assoc, this 23.4-foot tall structure serves the primary purposes of debris control and flood risk reduction, with a storage capacity of 142 acre-feet and a normal storage of 37 acre-feet. The dam spans a length of 700 feet and covers a surface area of 7.5 acres, with a drainage area of 0.29 square miles.

Despite being unregulated by the state and lacking regular inspections, Gs Dd No 7-31a poses a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. The dam features an uncontrolled spillway with a width of 30 feet and has not undergone any modifications since its completion. While the risk assessment is moderate, with a rating of 3 on the hazard scale, there are no specific risk management measures or emergency action plans in place for this structure. Overall, this dam plays a crucial role in mitigating flood risks in the area, but there is room for improvement in terms of monitoring and emergency preparedness.