Little River Watershed Site 65, located in Decatur, Iowa, is a significant earth dam completed in 1987 for flood risk reduction along the West Little River. With a height of 45 feet and a length of 1470 feet, this dam has a storage capacity of 6700 acre-feet and serves a drainage area of 9.4 square miles. Managed by the Iowa Department of Natural Resources, this dam is regulated, inspected, and enforced by state authorities to ensure its structural integrity and safety.

The dam at Little River Watershed Site 65 plays a crucial role in mitigating flood risks in the region, while also providing recreational opportunities for the local community. The dam's spillway type is uncontrolled with a width of 3 feet, and its hazard potential is deemed significant. Despite this, the condition assessment in 2019 reported the dam as satisfactory, with a moderate risk rating. Regular inspections are conducted every 5 years to monitor its performance and address any potential issues that may arise.

As a key infrastructure for water resource management, Little River Watershed Site 65 is a vital component of the local ecosystem and serves as a protective barrier against flooding events. With its strategic location and design, this dam showcases the collaborative efforts of various agencies, including the Natural Resources Conservation Service, in ensuring the safety and functionality of the structure. For water resource and climate enthusiasts, this site offers a fascinating case study in flood risk reduction and the importance of sustainable water management practices in the face of changing environmental conditions.