Fox Run Development - Lower Dam in Oskaloosa, Iowa, is a privately owned earth dam completed in 1996 with a primary purpose of flood risk reduction along the Muchakinock Creek. The dam stands at a height of 15 feet and spans a length of 230 feet, with a storage capacity of 23 acre-feet. Situated in Mahaska County, Iowa, this dam is regulated by the Iowa Department of Natural Resources and has a significant hazard potential.

Despite being classified as not rated in terms of condition assessment, the risk assessment for Fox Run Development - Lower Dam indicates a moderate risk level. The dam features an uncontrolled spillway with a width of 5 feet and a surface area of 1.9 acres, serving a drainage area of 0.6 square miles. While the dam has not been modified in recent years and lacks emergency action plans and inundation maps, it is subject to regular state inspections and enforcement to ensure its functionality and safety for the surrounding area. With its strategic location and critical flood risk reduction role, Fox Run Development - Lower Dam is a key asset in water resource management within the region.