Garst Dam, located on the South Raccoon River in Guthrie County, Iowa, is a privately-owned structure designed by the USDA NRCS and completed in 1965. With a primary purpose of fire protection and serving as a small fish pond, the earth dam stands at 36 feet tall and spans 473 feet in length. Its storage capacity is 87 acre-feet, with a normal storage level of 36 acre-feet and a surface area of 5 acres.

Managed by the Iowa Department of Natural Resources, Garst Dam is regulated, permitted, inspected, and enforced by state authorities to ensure its safety and compliance with regulations. Despite its low hazard potential, the dam's risk assessment is moderate, indicating a level 3 risk. While the condition assessment is currently not rated, the structure has not undergone significant modifications since its completion. With its uncontrolled spillway type and soil foundation, Garst Dam plays a crucial role in providing water resources for fire protection and supporting local wildlife in the area.