Lone Cone is a private irrigation dam located in San Miguel, Colorado, along the Goshorn Creek. Built in 1912, this earth dam stands at a height of 25 feet and has a hydraulic height of 27 feet. With a storage capacity of 1840 acre-feet, it serves the primary purpose of irrigation, supporting the agricultural needs of the surrounding area. The dam has a fair condition assessment and is classified as having a high hazard potential, emphasizing the importance of regular inspections and risk management measures.

Despite its age, Lone Cone continues to play a crucial role in water resource management in the region. The dam has a maximum discharge capacity of 3450 cubic feet per second and covers a surface area of 177 acres. While it does not have a spillway, it is equipped with slide and uncontrolled outlet gates for water release. The dam's condition is closely monitored, with the last inspection conducted in October 2020, highlighting the commitment to ensuring the safety and functionality of this vital water infrastructure.

With its historical significance and ongoing contribution to irrigation practices, Lone Cone stands as a testament to the importance of sustainable water resource management in the face of changing climate patterns. As a regulated and permitted structure, it exemplifies the collaborative efforts between private owners and state agencies to ensure the efficient and safe operation of water infrastructure. As water enthusiasts and climate advocates, recognizing the role of dams like Lone Cone in maintaining water security and agricultural sustainability is essential for addressing the challenges posed by a changing climate.