Hanna Dam, located in Lake Icaria, Iowa, is a privately owned earth dam constructed in 1994 by the Soil Conservation Service (SCS). This dam primarily serves the purposes of fire protection and stock or small fish pond management. It stands at a height of 21 feet and has a length of 580 feet, with a storage capacity of 69 acre-feet and a surface area of 3.5 acres. The dam is regulated by the Iowa Department of Natural Resources and is subject to regular inspections and enforcement to ensure its safety and compliance.

Despite being classified as having a low hazard potential, Hanna Dam is considered to have a moderate risk level due to its location and design. It does not have an Emergency Action Plan (EAP) in place, and its condition assessment is currently listed as "Not Rated." The dam is equipped with an uncontrolled spillway and does not have outlet gates or locks. The risk management measures for Hanna Dam are not specified in the data, but it is important for water resource and climate enthusiasts to monitor and advocate for proper maintenance and safety protocols to mitigate any potential risks associated with this vital infrastructure in the area.