Hanthorn Dam, located in Decatur County, Iowa, is a private earth dam constructed in 1991 by the USDA NRCS. With a height of 27 feet and a length of 430 feet, this dam serves multiple purposes including fire protection, stock, and small fish pond management. The dam has a storage capacity of 32 acre-feet and covers a surface area of 2.3 acres, receiving water from TR- Little River in the area.

Managed by the Iowa Department of Natural Resources, Hanthorn Dam is regulated and inspected regularly to ensure its safety and functionality. Despite being classified as a low hazard potential structure, the dam is considered to have moderate risk due to its location and characteristics. While the condition assessment of the dam is not rated, measures for risk management and emergency preparedness are in place to mitigate any potential risks associated with its operation.

For water resource and climate enthusiasts, Hanthorn Dam presents an interesting case study in private dam management and the importance of regulatory oversight in ensuring the safety and efficiency of such structures. With its unique location in the Little River Lake area and its multiple purposes, the dam serves as a crucial water resource for the surrounding community while also posing certain risks that need to be managed effectively. Overall, Hanthorn Dam stands as a testament to the intricate balance between water resource utilization and environmental conservation in the face of changing climate patterns.