Located in Montgomery County, Iowa, the Hallquist Dam is a private-owned structure designed by the NRCS for grade stabilization purposes. Completed in 2009, this earth dam stands at a height of 28 feet and spans a length of 552 feet, with a storage capacity of 156 acre-feet. Situated on a tributary to the Tarkio River, the dam serves to regulate water flow and prevent erosion in the surrounding area.

Managed by the Iowa Department of Natural Resources, the Hallquist Dam is subject to state regulations, inspections, and enforcement to ensure its safety and compliance. Classified as having a low hazard potential with a moderate risk assessment rating, this uncontrolled spillway dam plays a crucial role in managing water resources for the local community. Despite not having a current condition assessment, the dam continues to serve its purpose effectively.

With Cindy Axne as the representative for the district, the Hallquist Dam stands as a testament to the importance of water resource management and climate resilience. As a key infrastructure for flood control and environmental protection, this structure exemplifies the collaborative efforts between private owners, government agencies, and designers to safeguard communities and ecosystems in the face of changing climate conditions.