Gerlach Dam, located in Linn Grove, Iowa, is a privately owned structure designed by USDA NRCS and regulated by the Iowa DNR. Completed in 1978, this earth dam stands at a height of 31 feet and serves multiple purposes, including fire protection and creating a small fish pond. With a storage capacity of 47 acre-feet and a surface area of 2.4 acres, Gerlach Dam plays a vital role in managing water resources in the area.

The dam, situated on TR-Cottonwood Creek, has a low hazard potential and a moderate risk assessment rating. Despite not being rated for its condition assessment, Gerlach Dam is subject to state permitting, inspection, and enforcement to ensure its safety and functionality. While it does not have an Emergency Action Plan (EAP) prepared, the structure meets regulatory guidelines and has not undergone any recent modifications, highlighting its reliability as a water management infrastructure in the region.

As a key component of water resource management in Buena Vista County, Iowa, Gerlach Dam underscores the importance of sustainable infrastructure for climate resilience. With its controlled spillway and modest storage capacity, the dam serves as a crucial asset for both local water supply and environmental conservation efforts. Its strategic location and design by the USDA NRCS demonstrate a commitment to safeguarding water resources and mitigating potential risks associated with climate variability.