Grimm Dam, located in Louisa, Iowa, along the TR-Iowa River, was completed in 1987 by the Soil Conservation Service (SCS) and is privately owned. This earth dam stands at 38 feet in height and stretches 260 feet in length, with a storage capacity of 112 acre-feet. The primary purposes of Grimm Dam are fire protection, stock, and serving as a small fish pond, making it a valuable resource for the local community.

Managed by the Iowa Department of Natural Resources, Grimm Dam is regulated, permitted, inspected, and enforced by state authorities to ensure its safety and compliance with regulations. The dam has a low hazard potential and a moderate risk assessment rating of 3, indicating a need for ongoing risk management measures. Despite its uncontrolled spillway type, Grimm Dam plays a crucial role in water resource management, supporting irrigation, wildlife habitat, and recreational activities in the area.

For water resource and climate enthusiasts, Grimm Dam offers a fascinating example of earth dam construction and management in the Midwest. With its strategic location and design, this dam contributes to the sustainable use of water resources and provides essential services for fire protection, livestock, and fisheries. As climate change continues to impact water availability and quality, dams like Grimm play a vital role in mitigating risks and ensuring the resilience of communities in the face of environmental challenges.