Blackwell Dam, located in Mt. Sterling, Iowa, is a privately owned structure designed by the USDA NRCS and regulated by the Iowa DNR. Completed in 1958, this earth dam stands at a height of 23 feet and spans a length of 455 feet, serving primarily for fire protection and as a small fish pond. With a storage capacity of 56 acre-feet and a surface area of 4 acres, Blackwell Dam plays a crucial role in water resource management in the region.

Despite being classified as having a low hazard potential and a moderate risk assessment, Blackwell Dam's condition remains unrated. The dam's spillway, categorized as uncontrolled, presents a unique aspect of its design. While it has not undergone any modifications since its completion, the dam's last inspection dates back to 1960. With a drainage area of 0.32 square miles, the dam serves as a vital piece of infrastructure for maintaining water supply and regulating flow in the Fox River.

For water resource and climate enthusiasts, Blackwell Dam offers a fascinating case study in dam construction and management. With its historical significance and continued operational relevance, this structure exemplifies the intricate balance between human intervention and natural ecosystems. As efforts towards sustainable water management continue to gain importance, Blackwell Dam stands as a testament to the enduring legacy of water infrastructure in the region.