John Hackbarth is a privately owned dam located in Hardin, Iowa, along the TR- Iowa River. Built in 2002 by NRCS, this Earth-type dam stands at a height of 31 feet and serves multiple purposes including fire protection, stock, and small fish pond. With a storage capacity of 90 acre-feet, the dam covers a surface area of 4.7 acres and has a drainage area of 0.78 square miles.

Managed by the Iowa DNR, John Hackbarth has been rated as having a low hazard potential and a moderate risk assessment. Although the condition of the dam is currently not rated, it undergoes regular inspections and is equipped with an uncontrolled spillway with a width of 4 feet. The dam is designed to handle normal storage of 31 acre-feet and has not experienced any significant modifications since its completion.

Located in Steamboat Rock and under the jurisdiction of the state, John Hackbarth is an essential structure for the local community in terms of water resource management and environmental conservation. With its diverse functionalities and regulated operation, this dam stands as a testament to sustainable water infrastructure in the region.