Lone Tree is a privately owned dam located in Owyhee, Idaho, serving as a crucial water resource for the area. Built in 1918, this Earth dam stands at a height of 11.9 feet and has a storage capacity of 415 acre-feet. The dam, constructed with stone core and rock and soil foundations, spans a length of 1150 feet and covers a surface area of 140 acres, with a drainage area of 1.6 square miles.

Despite its age, Lone Tree has been deemed to have a low hazard potential and fair condition, with a moderate risk assessment rating. The dam features an uncontrolled spillway type and utilizes slide gates for outlet control. With state regulation, inspection, and enforcement in place, Lone Tree Creek remains a vital component of water management in the region. Enthusiasts of water resources and climate will find this dam's historical significance and operational details intriguing.