Hummel Dam, located in Plymouth County, Iowa, was completed in 1966 and is owned and regulated by a private entity. The dam, designed by USDA NRCS, serves multiple purposes including fire protection, stock, and small fish pond, as well as recreation. With a height of 43 feet and a length of 440 feet, the earth dam has a storage capacity of 47 acre-feet and covers a surface area of 2.6 acres.

Managed by the Iowa Department of Natural Resources, the dam has a low hazard potential and is currently rated as "Not Rated" for condition assessment. Despite its moderate risk level, the dam is regularly inspected and maintained to ensure public safety. Situated on the TR-Big Sioux River, Hummel Dam plays a crucial role in water resource management and provides essential services to the surrounding community.

With its uncontrolled spillway type and a drainage area of 0.26 square miles, Hummel Dam is a vital infrastructure for both water conservation and recreational activities in the area. The dam's strategic location in Sioux City, along with its multiple uses and low hazard potential, highlights its significance in safeguarding water resources and enhancing the overall environmental and social well-being of the region.