Lake Macbride Dam in Johnson County, Iowa, is a state-regulated earth dam completed in 1930 by the Corps of Engineers, with a primary purpose of recreation. The dam stands at a height of 56 feet and spans 900 feet, creating a reservoir with a storage capacity of 28,000 acre-feet and a surface area of 950 acres. Located on Mill Creek within Coralville Reservoir, the dam has a spillway width of 150 feet and is classified as having a significant hazard potential.

Despite its age, Lake Macbride Dam's condition assessment is regarded as satisfactory, with inspections conducted every five years to ensure its structural integrity. The dam is owned and regulated by the Iowa Department of Natural Resources, with enforcement and permitting handled at the state level. Situated in a scenic area with a drainage area of 27.1 square miles, the dam not only serves as a recreational spot but also plays a crucial role in managing water resources and mitigating flood risks in the region. For water resource and climate enthusiasts, Lake Macbride Dam is a fascinating example of engineering ingenuity and environmental stewardship in action.