Mcclellan Lake, located in Payson, Utah, is a privately owned reservoir with a primary purpose of irrigation. Built in 1907, this earth dam structure stands at a hydraulic height of 25 feet and has a storage capacity of 33 acre-feet. The lake is fed by Wimmer Ranch Creek and covers a drainage area of 1 square mile. With a significant hazard potential and a condition assessment that is currently not rated, Mcclellan Lake is regulated by the Utah Division of Water Rights and undergoes regular inspections to ensure its integrity.

Despite its age, Mcclellan Lake continues to serve its intended purpose of providing water for agricultural irrigation in the surrounding area. The reservoir has a spillway width that is currently unspecified, but its maximum discharge capacity is recorded at 38 cubic feet per second. The dam is situated within the jurisdiction of the state of Utah and is subject to state permitting, inspection, and enforcement. Additionally, Mcclellan Lake is located in an area represented by Congressman John R. Curtis, who serves on the House Committee on Natural Resources.

As a vital water resource within the region, Mcclellan Lake plays a crucial role in supporting local agriculture and maintaining water security. With its historical significance dating back over a century, efforts are continuously made to ensure the safety and functionality of this essential irrigation reservoir. As climate change impacts water resources globally, the management and regulation of structures like Mcclellan Lake become increasingly important in safeguarding water availability for future generations.