Rosean is a private earth dam located in Weston, Wyoming, specifically in the city of Newcastle. Built in 1955, this dam serves multiple purposes including fire protection, stock, and small fish pond. With a height of 23 feet and a length of 900 feet, Rosean has a storage capacity of 117 acre-feet and a surface area of 11 acres. The dam is regulated by the State of Wyoming and is subject to regular inspections to ensure its structural integrity and safety.

Despite its low hazard potential, Rosean is classified as having a poor condition assessment as of the last inspection in May 2017. The dam features an uncontrolled spillway with a width of 40 feet and one outlet valve. While it poses a moderate risk level according to the data, there are no detailed risk management measures outlined for this structure. With its location along the Rosean Draw river/stream, this dam plays a crucial role in water resource management and climate resilience efforts in the region.

Water resource and climate enthusiasts interested in the infrastructure that supports fire protection, livestock, and aquatic ecosystems will find Rosean to be a significant landmark in Wyoming. Situated within the Omaha District and under the jurisdiction of the State of Wyoming, this dam showcases the intersection of human development and natural resource management. Despite its poor condition assessment and moderate risk level, Rosean remains a valuable asset for water storage and management, contributing to the overall resilience of the local community and ecosystem.