Evans Desert Aire Pond in Grant, Washington is a privately owned offstream reservoir primarily used for irrigation purposes. Completed in 1990, this earth dam structure has a hydraulic height of 9 feet and a length of 2400 feet, providing a storage capacity of 71 acre-feet. The reservoir covers a surface area of 5.4 acres and serves a drainage area of 0.01 square miles, with a maximum discharge of 10 cubic feet per second.

Managed by the Washington Department of Ecology, Evans Desert Aire Pond has a high hazard potential but is currently assessed to be in satisfactory condition. Regular inspections are conducted, with the most recent one in May 2019, ensuring the safety and functionality of the dam. Despite its small size, the reservoir plays a crucial role in supporting local agriculture and water resource management in the region. As a hidden gem in the desert landscape, this pond serves as a vital water source for the surrounding area, showcasing the importance of sustainable water infrastructure in arid climates.