Located in Hazelton, Iowa, the Fontana Milldam is a gravity dam completed in 1962 primarily for recreational purposes. It stands at 14 feet high with a length of 180 feet, providing a storage capacity of 500 acre-feet. The dam, situated on Otter Creek, covers a surface area of 59 acres and serves the community as a popular recreational spot.

Managed by the Iowa Department of Natural Resources, the Fontana Milldam is regulated, inspected, and enforced to ensure its safety and functionality. The dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Although last inspected in 1977, the dam's risk assessment is moderate, highlighting the importance of ongoing monitoring and maintenance to mitigate potential risks.

With a serene setting and ample recreational opportunities, the Fontana Milldam is a valuable resource in Buchanan County, Iowa. While its primary purpose is for recreation, the dam also contributes to the local ecosystem and water management efforts. As climate and water resource enthusiasts explore this site on Otter Creek, it is essential to appreciate the balance between human enjoyment and environmental stewardship in sustaining this unique infrastructure.