East Fork Grand River Watershed Site A-40 in Union, Iowa, is a key flood risk reduction structure managed by the local government with oversight from the Iowa Department of Natural Resources. Completed in 2005 by the USDA NRCS, this earth dam stands at 24 feet high and spans 385 feet in length, providing a maximum storage capacity of 71 acre-feet. Situated along TR- Squaw Creek, this structure plays a crucial role in reducing flood risks in the area.

With a low hazard potential and a moderate risk assessment rating, East Fork Grand River Watershed Site A-40 is a critical asset for managing water resources in the region. Although the dam's condition assessment is not rated, its design and construction by the Natural Resources Conservation Service ensure its reliability in flood mitigation efforts. The dam's uncontrolled spillway and soil foundation further demonstrate its effectiveness in handling excess water flow during periods of heavy rainfall.

As water resource and climate enthusiasts, understanding the importance of structures like East Fork Grand River Watershed Site A-40 is vital for sustainable water management practices. With a focus on flood risk reduction, this earth dam serves as a valuable tool in protecting communities and ecosystems from the impacts of extreme weather events. By staying informed about the design, purpose, and functionality of such structures, we can work towards building more resilient and adaptive water infrastructure systems for the future.