Dd No 255 is a local government-owned earth dam in Kansas, specifically located in Morris County. Completed in 2011 for flood risk reduction on the Rock Creek-TR stream, this dam stands at a height of 30.9 feet and has a length of 1350 feet. With a storage capacity of 582 acre-feet, it serves the primary purpose of flood risk reduction and has a low hazard potential.

Managed by the Kansas Department of Agriculture, Dd No 255 is regulated, permitted, inspected, and enforced by the state. Despite being categorized as "Not Rated" in terms of condition assessment, it has a moderate risk level. The dam features an uncontrolled spillway with a width of 100 feet and does not have outlet gates or associated structures. The last inspection was conducted in July 2011, and the dam is situated within a drainage area of 1.83 square miles.

For water resource and climate enthusiasts, Dd No 255 presents an intriguing case study in dam infrastructure and flood risk management. Its construction and operational details provide valuable insights into the efforts undertaken by local governments to mitigate flood hazards and protect communities. With its location on the Rock Creek-TR stream and its significant storage capacity, this dam plays a crucial role in safeguarding the surrounding area from potential flooding events.