Macks Creek is a privately owned dam located in Owyhee County, Idaho, along Highway 78. Completed in 1993, this rockfill dam stands at a height of 58.3 feet and has a storage capacity of 469 acre-feet. The dam serves the primary purpose of water resource management and is regulated by the Idaho Department of Water Resources.

With a significant hazard potential and a fair condition assessment as of May 2018, Macks Creek is equipped with a slide gate outlet and an uncontrolled spillway with a width of 160 feet. The dam is situated on Macks Creek, a tributary of Reynolds Creek, and has a drainage area of 12.3 square miles. The dam's maximum discharge capacity is 780 cubic feet per second, making it a crucial structure for flood control and water supply in the region.

Despite its moderate risk assessment, Macks Creek has not undergone recent modifications or emergency action plan updates. The dam is inspected every four years to ensure its safe operation and compliance with state regulations. With its strategic location and essential role in water management, Macks Creek remains a key infrastructure for climate and water resource enthusiasts to monitor and study in the dynamic landscape of Idaho's water systems.