Lone Tree is a privately owned irrigation dam located on Lone Tree Creek in Campbell County, Wyoming. Built in 1906, this earth dam stands at a height of 14 feet and has a storage capacity of 237 acre-feet. Its primary purpose is for irrigation, with additional uses for fire protection, stock, or small fish pond. Despite being classified as having a low hazard potential, the dam's condition assessment in 2019 was reported as unsatisfactory, indicating a need for maintenance and upgrades to ensure its continued safety and functionality.

With a spillway width of 300 feet and an uncontrolled spillway type, Lone Tree Dam has a moderate risk assessment rating. The dam's inspection frequency is set at 5 years, with the last assessment conducted in July 2019. The dam's drainage area is listed as 0, indicating its reliance on water from Lone Tree Creek for storage and irrigation purposes. The dam is not under the jurisdiction of any federal agency, and its operations, inspections, and enforcement are managed by the state of Wyoming through the State Engineer's Office.

Lone Tree Dam, situated in the picturesque surroundings of Campbell County, plays a vital role in providing water for irrigation and other purposes in the region. Water resource and climate enthusiasts interested in the management and maintenance of dams will find Lone Tree's history, design features, and regulatory oversight to be intriguing aspects of this essential water infrastructure. As efforts continue to ensure the dam's safety and effectiveness, its significance in supporting agricultural activities and water supply in the area remains paramount.