Hainline Dam, located in Ringgold County, Iowa, was completed in 1996 and is primarily owned by a private entity. The dam, designed by NRCS, serves the purpose of fire protection, stock, or small fish pond. With a height of 31 feet and a length of 215 feet, the dam has a storage capacity of 46 acre-feet and covers a surface area of 2.8 acres.

The dam, built on TR-GRAND RIVER, is regulated by the Iowa DNR and is inspected, permitted, and enforced by the state. Despite its low hazard potential, the dam's risk assessment is moderate (3), indicating a need for risk management measures. The spillway type is uncontrolled, and the dam is constructed with earth materials on a soil foundation.

Water resource and climate enthusiasts interested in Hainline Dam will find its location, design, purpose, and regulatory information compelling. The dam not only serves practical functions but also presents opportunities for studying hydrological processes and risk management strategies in dam infrastructure. Its association with the Grand River and the environmental impact of the dam's construction add to its significance in the context of water resource management and climate adaptation.