Dd No 7-11 is a rockfill dam located on Long Creek-TR in Coffey, Kansas. Completed in 1999, the primary purpose of this dam is flood risk reduction. Standing at a height of 28 feet and with a length of 1050 feet, Dd No 7-11 has a storage capacity of 752 acre-feet and a drainage area of 2.42 square miles. The dam is state-regulated and has state permitting, inspection, and enforcement processes in place to ensure its safety and functionality.

Despite being classified as low hazard potential, Dd No 7-11 is subject to moderate risk assessment due to its location and function. The dam has not been rated for its condition assessment, but it meets state guidelines for emergency action plans. With a spillway width of 100 feet and a maximum discharge of 2684 cubic feet per second, Dd No 7-11 is equipped to handle excess water flow during flood events. Overall, this dam plays a crucial role in mitigating flood risks in the area and is closely monitored to ensure its effectiveness in protecting the surrounding community.