Sibley is a captivating water resource nestled in the heart of Wyoming, specifically in Sheridan County. Managed by the Forest Service, this federal-owned dam on Prune Creek serves primarily for recreational purposes, including fish and wildlife pond activities. Built-in 1938, the Earth-type dam stands at 30 feet tall and stretches 420 feet in length, holding a storage capacity of 635 acre-feet and covering a surface area of 34 acres. With a high hazard potential and a moderate risk assessment rating, Sibley plays a crucial role in maintaining the ecological balance and water supply for the region.

Despite its age, Sibley remains under the vigilant oversight of the Forest Service, with regular inspections and state-regulated maintenance in place. The dam boasts a maximum discharge capacity of 1360 cubic feet per second and an uncontrolled spillway width of 22 feet. While its condition assessment is labeled as "Not Rated," the dam's structural integrity and operational efficiency are upheld through continuous monitoring and risk management measures. In the event of an emergency, the dam is equipped with emergency action plans, ensuring the safety of downstream communities and enhancing overall disaster preparedness.

Located in the scenic city of Dayton, Sibley stands as a testament to sustainable water resource management and environmental stewardship. With its picturesque surroundings and vital role in supporting local wildlife habitats, the dam serves as a key hub for outdoor recreation and nature appreciation. As climate change continues to impact water resources, Sibley remains a resilient structure, safeguarding against potential hazards and contributing to the ecological resilience of the region.