Located in Jackson County, Kansas, Gs Dd No C-40 (Elk 61) is a local government-owned dam designed by the USDA NRCS for flood risk reduction along Elk Creek. Completed in 1991, this earth dam stands at a height of 36.3 feet and has a length of 630 feet, providing storage for up to 325 acre-feet of water. While the dam's primary purpose is flood risk reduction, it also serves debris control for the surrounding area.

With a low hazard potential and a moderate risk assessment rating, Gs Dd No C-40 (Elk 61) is regulated by the Kansas Department of Agriculture and undergoes state permitting, inspection, and enforcement. The dam features an uncontrolled spillway with a width of 40 feet and a maximum discharge capacity of 1300 cubic feet per second. Despite not being rated for condition assessment, the dam's risk management measures are in place to ensure the safety and resilience of the structure in case of emergencies. Enthusiasts of water resources and climate will find this dam an intriguing example of infrastructure designed to mitigate flood risks in the region.