Hempys Lake Dam, located in Tama County, Iowa, is a privately owned earth dam completed in 1963 for recreational purposes. With a height of 32 feet and a length of 450 feet, the dam creates a reservoir with a storage capacity of 250 acre-feet and a surface area of 11 acres. Despite its low hazard potential, the dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections to ensure its safety and integrity.

Surrounded by the tranquil waters of TR-Sugar Creek, Hempys Lake Dam offers a picturesque setting for fishing, boating, and other recreational activities. The dam's uncontrolled spillway and soil foundation contribute to its simple yet effective design, which has stood the test of time since its construction over half a century ago. Despite being classified as moderate risk level 3, the dam has not been rated for its condition, highlighting the need for ongoing risk management measures and emergency preparedness.

In the political landscape, Hempys Lake Dam falls under the jurisdiction of the Detroit District of the U.S. Army Corps of Engineers, with oversight from the Iowa DNR. With its peaceful surroundings and importance for fire protection, stock, and small fish pond maintenance, Hempys Lake Dam serves as a valuable resource for the local community and a testament to the enduring relationship between water resources and climate enthusiasts.