Iowa Noname74 is a recreational earth dam located in Louisa, Iowa, near the city of Elrick. Built in 1976 by the USDA NRCS, this dam stands at a height of 29 feet and has a length of 273 feet, providing a storage capacity of 59 acre-feet. With a surface area of 40 acres and a drainage area of 0.11 square miles, the dam is regulated by the Iowa Department of Natural Resources and is regularly inspected and maintained to ensure public safety.

The primary purpose of Iowa Noname74 is recreation, offering opportunities for outdoor activities in the surrounding area. Despite being classified as a low hazard potential structure, the dam is subject to moderate risk assessment due to its age and condition. The dam is equipped with an uncontrolled spillway and is located along the TR-OTTER CREEK river or stream, under the jurisdiction of the Rock Island District of the US Army Corps of Engineers, with oversight from local government agencies.

Water resource and climate enthusiasts can appreciate the importance of Iowa Noname74 in providing recreational opportunities while also serving as a critical structure for flood control and water management in the region. With its state-regulated status and regular inspections, this dam exemplifies the collaborative efforts between local government agencies and federal partners to ensure the safety and sustainability of water resources in Iowa.