Boone Milldam, located in Boone, Iowa, is a gravity dam constructed in 1932 for the primary purpose of water supply. The dam stands at 7 feet high and spans 355 feet in length, with a storage capacity of 387 acre-feet and a surface area of 110 acres. It is situated on the Des Moines River, within the Rock Island District, and is owned and regulated by the local government, with oversight from the Iowa Department of Natural Resources.

Despite being classified as having a low hazard potential, Boone Milldam is considered to have a moderate risk level, with a risk assessment rating of 3. The dam has not been rated for its condition assessment and last underwent an inspection in September 1989. While the dam has not been modified in recent years, it is subject to state regulatory oversight, including permitting, inspection, and enforcement by the Iowa DNR. The dam's emergency action plan status and risk management measures are currently not specified.

Boone Milldam serves not only as a vital water supply structure but also offers recreational opportunities within the surrounding area. With its historical significance and environmental impact on the Des Moines River, the dam provides a focal point for water resource and climate enthusiasts interested in understanding the intersection of human infrastructure with natural ecosystems.