Holiday Lake Dam, located in Marengo, Iowa, serves as a recreational hub along the tranquil waters of TR-Walnut Creek. Built in 1962, this earth dam stands at 50 feet high, with a length of 1,205 feet, creating a reservoir with a storage capacity of 2,100 acre-feet. The dam's primary purpose is recreation, offering visitors a surface area of 96.5 acres to enjoy various water activities.

Managed by private owners, Holiday Lake Dam is regulated by the Iowa Department of Natural Resources, ensuring its compliance with state inspection, permitting, and enforcement requirements. Despite its significant hazard potential, the dam has been deemed to be in satisfactory condition during its last assessment in July 2016. With a moderate risk rating, the dam stands as a vital structure for water resource and climate enthusiasts to explore and appreciate in the heart of Poweshiek County, Iowa.

Holiday Lake Dam's picturesque setting, combined with its historical significance and recreational amenities, makes it a must-visit destination for water resource and climate enthusiasts. As one of Iowa's regulated dams, it stands as a symbol of responsible water management, offering a safe and enjoyable environment for visitors to appreciate the beauty and importance of our natural water resources. Whether you're looking to relax by the waterside or learn more about dam infrastructure, Holiday Lake Dam provides a captivating experience for all who appreciate the intersection of water conservation and outdoor recreation.