Located in Boone, Iowa, the Engnell Dam is a privately owned structure designed by the USDA NRCS with a primary purpose of fire protection, stock, or small fish pond. Completed in 1970, this earth dam stands at a height of 36 feet and stretches 259 feet in length, with a storage capacity of 50 acre-feet. The dam is situated on the TR-DES MOINES river and is regulated by the Iowa DNR, with inspections and enforcement measures in place to ensure its safety and compliance with state regulations.

Despite its low hazard potential, the Engnell Dam serves as a critical resource for water management and conservation in the region. Its moderate risk level is monitored closely, although specific risk management measures are not currently outlined. The dam's condition is not rated, highlighting the need for ongoing assessment and maintenance to uphold its functionality and safety. With a surface area of 3 acres and a normal storage capacity of 30 acre-feet, the Engnell Dam plays a vital role in supporting local ecosystems and providing essential water resources for various purposes, showcasing its significance in the broader context of water resource management and climate resilience efforts in the area.