Nelson Dam 605, located in Cheyenne, Nebraska, is a privately owned earth dam designed by the USDA NRCS to serve as a crucial flood risk reduction structure along TR-Lodgepole Creek. Completed in 1967, this dam stands at a height of 34 feet, with a maximum storage capacity of 593 acre-feet and a drainage area of 6.4 square miles. The dam's primary purpose is flood risk reduction, with a significant hazard potential but a satisfactory condition assessment as of June 2018.

Managed by the Nebraska Department of Natural Resources, Nelson Dam 605 undergoes regular inspections every three years to ensure its structural integrity and safety. With a structural height of 39 feet and a hydraulic height of 33 feet, the dam plays a vital role in managing water flow and protecting the surrounding area from potential flooding events. The dam's location in Sidney, Nebraska, highlights its importance in safeguarding the community and its residents from the impacts of extreme weather events.

As part of its risk management measures, Nelson Dam 605 does not fall under the jurisdiction of the US Army Corps of Engineers but relies on state regulatory agencies for permitting, inspection, and enforcement. Despite its significant hazard potential, the dam's design and construction by the Natural Resources Conservation Service reflect a commitment to mitigating flood risks and ensuring the safety of downstream areas. For water resource and climate enthusiasts, Nelson Dam 605 serves as a testament to proactive flood risk reduction efforts in Nebraska, safeguarding communities and ecosystems from the impacts of extreme weather events.