Hopkins Dam, located in Fremont County, Iowa, is a private earth dam constructed in 1959 by the USDA NRCS for fire protection and as a stock or small fish pond. With a height of 37 feet and a length of 386 feet, the dam has a storage capacity of 43 acre-feet and serves the purpose of regulating water flow in TR-Mill Creek. Despite being uncontrolled, the spillway design poses a low hazard potential, and the dam is rated as having a moderate risk level.

Managed by the Iowa Department of Natural Resources, Hopkins Dam undergoes state inspection, regulation, and permitting to ensure its structural integrity and operational safety. While the last inspection took place in 1960, the dam is still actively monitored to mitigate any potential risks. With its location in a picturesque setting near Hamburg, Iowa, water resource and climate enthusiasts can appreciate the important role Hopkins Dam plays in water management and conservation efforts in the area.