Diamond Lake Watershed Site B-9 is a local government-owned structure located in Poweshiek, Iowa, with a primary purpose of flood risk reduction. Constructed in 1972 by the USDA NRCS, this earth dam stands at a height of 28 feet and spans 412 feet in length, providing a storage capacity of 47 acre-feet. Situated on TR-Moon Creek, this site is regulated by the Iowa DNR and undergoes regular state inspections, enforcement, and permitting to ensure its functionality and compliance with safety standards.

With a low hazard potential and a moderate risk assessment rating, Diamond Lake Watershed Site B-9 plays a crucial role in protecting the surrounding area from potential flood damage. The dam's structural integrity is maintained through state-regulated inspections and enforcement, ensuring its continued effectiveness in flood risk reduction. As part of the larger Detroit District water management system, this site serves as a key component in safeguarding the local community and environment from the impacts of extreme weather events and climate change.

As a vital piece of infrastructure in the region, Diamond Lake Watershed Site B-9 highlights the importance of sustainable water resource management and climate resilience. With a focus on flood risk reduction, fire protection, and environmental conservation, this site exemplifies the collaboration between local government, federal agencies, and designers to mitigate the impacts of climate change on water resources. By maintaining and enhancing the functionality of this earth dam, stakeholders can ensure the long-term safety and sustainability of the Diamond Lake Watershed area in Iowa.