Dd No 125, located in Lyon County, Kansas, is a local government-owned earth dam designed by Mid-Kansas Engineering for flood risk reduction on Elm Creek. With a height of 28 feet and a length of 900 feet, this dam has a storage capacity of 314.3 acre-feet and serves to protect the surrounding area from potential flooding events. The dam is regulated and inspected by the Kansas Department of Agriculture to ensure its structural integrity and functionality.

Despite being classified as having a low hazard potential, Dd No 125 plays a crucial role in mitigating flood risks in the region. The dam features an uncontrolled spillway with a width of 40 feet and has a maximum discharge capacity of 1200 cubic feet per second. With a normal storage capacity of 42.22 acre-feet and a surface area of 8.75 acres, Dd No 125 is essential for managing water levels and protecting downstream areas from potential inundation.

Although the dam's condition assessment is currently listed as "Not Rated," ongoing inspections and maintenance ensure that it continues to meet safety standards. With a moderate risk assessment rating of 3, Dd No 125 is a vital piece of infrastructure in the area's water management system, providing essential flood protection for the local community.