Garr is a privately owned dam located in Dewey, South Dakota, along the TR MOREAU river. Built in 1942, this earth dam stands at 20 feet tall and stretches 600 feet in length, with a storage capacity of 72 acre-feet. The dam is regulated by the state regulatory agency DENR and undergoes regular inspections, enforcement, and permitting to ensure its safety and compliance with state regulations.

Despite its low hazard potential, Garr has not been rated for its condition assessment. It does not have an Emergency Action Plan (EAP) prepared, and there are no updated inundation maps or risk assessments available for the dam. While the dam does not have associated structures or falls under the jurisdiction of federal agencies, it plays a crucial role in managing water resources in the region and providing flood control along the TR MOREAU river.

With its location in a rural area, Garr serves as a vital infrastructure for water resource management in South Dakota. Although it may not boast grandeur in terms of size or complexity, its role in regulating water flow and providing storage capacity highlights the importance of even small-scale dams in maintaining water security and climate resilience in the region.