Terlouw Dam, located in Jasper County, Iowa, serves multiple purposes including fire protection, stock, and small fish pond management. Constructed in 1968 by the USDA NRCS, this earth dam stands at 29 feet high and stretches 497 feet in length, providing a storage capacity of 156 acre-feet. The dam is regulated by the Iowa Department of Natural Resources and is designed to handle low hazard potential situations.

Situated on TR-Slater Creek, Terlouw Dam plays a crucial role in managing water resources in the region. With a surface area of 8.2 acres and a drainage area of 0.53 square miles, the dam helps control water flow and provides valuable water storage for agricultural and environmental purposes. The dam's uncontrolled spillway and soil foundation contribute to its functional design, while its moderate risk assessment rating emphasizes the importance of proper maintenance and monitoring.

Despite its low hazard potential, Terlouw Dam remains an essential structure for water management in the area. As a private-owned dam, its maintenance and regulatory oversight fall under the jurisdiction of the Iowa DNR. With a focus on fire protection, livestock support, and ecological conservation, this dam serves as a testament to sustainable water resource management practices in the region, highlighting the intersection of climate resilience and community needs.