Iowa Noname20 is a small earth dam located in the Humboldt County of Iowa, specifically in the city of Dakota City. Completed in 1968, this dam serves multiple purposes including fire protection, stock, and small fish pond management. With a height of 21 feet and a length of 360 feet, Iowa Noname20 has a storage capacity of 81 acre-feet and covers a surface area of 4.9 acres. It is regulated by the Iowa Department of Natural Resources and undergoes regular inspections and enforcement to ensure its safety and compliance.

The dam's primary purpose is to provide essential services such as fire protection and livestock watering, while also supporting recreational activities such as fishing. Despite being classified as having a low hazard potential, Iowa Noname20 is considered to have a moderate risk level, highlighting the importance of ongoing risk assessment and management measures. The dam is located on the TR-East Branch Des Moines River and falls under the jurisdiction of the St. Paul District of the US Army Corps of Engineers, ensuring proper oversight and regulation to protect the surrounding community and environment.

As a vital infrastructure for the local area, Iowa Noname20 plays a crucial role in water resource management and climate resilience efforts. With its regulated state permitting, inspection, and enforcement, the dam serves as a model for responsible dam ownership by local government agencies. Its strategic location and purposeful design make it a valuable asset for both emergency preparedness and everyday water supply needs, showcasing the importance of sustainable water infrastructure in the face of changing climate conditions.