Mckelvie #1, also known as Bob Mcelvie, is a private irrigation dam located in Mesa, Colorado, along the Plateau Creek. Built in 1911, this Earth-type dam stands at a height of 32 feet and has a length of 450 feet, with a storage capacity of 357 acre-feet. The dam is regulated by the Colorado Department of Water Resources and undergoes regular inspections, with the last assessment conducted in August 2020, rating its condition as fair with low hazard potential.

Despite its age, Mckelvie #1 remains a vital resource for agricultural water supply in the area, contributing to the irrigation needs of the surrounding farmland. The dam's spillway, with a width of 25 feet, is uncontrolled, allowing for controlled release of excess water during periods of high discharge. The dam has also undergone modifications in 1959 to enhance its structural integrity, ensuring its continued functionality and safety for the community it serves.

While the dam presents a moderate risk level, with a risk assessment rating of 3, there are no current emergency action plans in place. However, with a designated emergency contact and regular inspections, the dam is well-maintained and monitored to mitigate potential hazards. Mckelvie #1 stands as a testament to the importance of water resource management and climate resilience in sustaining agricultural activities in the region.