Leon Lake, also known as Two-Sides, is a privately owned water resource nestled in Mesa County, Colorado. Built in 1898, this earth dam stands 30 feet tall and spans 110 feet in length, providing irrigation water for the area. With a normal storage capacity of 2339 acre-feet and a maximum discharge of 772 cubic feet per second, Leon Lake plays a crucial role in supporting agricultural activities in the region.

Despite its age, Leon Lake maintains a fair condition assessment and has a high hazard potential due to its uncontrolled spillway type. The dam has undergone several modifications over the years, including hydraulic, mechanical, and structural improvements in 1950 and 1987. With two slide gates for outlet control, the dam is inspected annually to ensure its reliability and safety. In the event of an emergency, the risk assessment categorizes Leon Lake as having a moderate risk level, emphasizing the importance of effective risk management measures for the surrounding community.

Located in the picturesque city of Collbran, Leon Lake not only serves as a vital irrigation source but also offers recreational opportunities for visitors to enjoy its serene surroundings. With its historical significance dating back over a century, this reservoir continues to play a significant role in water resource management and climate resilience efforts in the region.