Blockton Watershed Site S-9, located in the picturesque city of Blockton, Iowa, is a vital water resource managed by the local government for various purposes including fire protection, stock, small fish pond management, flood risk reduction, and recreation. This dam, completed in 1973, stands at a height of 30 feet and has a storage capacity of 255 acre-feet, serving a drainage area of 0.81 square miles along the TR-Platte River. The dam's earth construction and soil foundation make it a reliable structure for water management in the region.

Managed by the Iowa Department of Natural Resources, Blockton Watershed Site S-9 has a low hazard potential and a moderate risk assessment rating. Although the dam's condition is currently not rated, it undergoes regular inspections and enforcement to ensure its integrity and safety. With its uncontrolled spillway and a surface area of 12.3 acres, this site plays a crucial role in water resource management and ecosystem conservation in the area. For water resource and climate enthusiasts, Blockton Watershed Site S-9 offers a fascinating study in sustainable water management practices and the interconnectedness of water resources with local ecosystems.