Jasper County Roadgrade Dam 15-81-20, located in Reasnor, Iowa, is a local government-owned earth dam completed in 2005 for grade stabilization along Turkey Creek. Designed by Michael Olson, Jasper County Engineer, the dam stands at a height of 38 feet and spans 830 feet in length, with a storage capacity of 480 acre-feet. Despite its low hazard potential, the dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections to ensure its structural integrity.

With a drainage area of 0.79 square miles and a surface area of 20.6 acres, Jasper County Roadgrade Dam 15-81-20 serves a primary purpose of grade stabilization and is equipped with an uncontrolled spillway. The dam's risk assessment is classified as moderate, with a risk management plan in place to mitigate potential hazards. Although its condition is currently not rated, the dam's design and construction adhere to state regulations, demonstrating a commitment to water resource management and environmental protection in Jasper County.

For water resource and climate enthusiasts, Jasper County Roadgrade Dam 15-81-20 offers a fascinating case study in earth dam engineering and local government stewardship. Its strategic location along Turkey Creek, coupled with its storage capacity and risk management measures, highlight the importance of responsible dam maintenance and oversight in safeguarding water resources for communities like Reasnor, Iowa.