Woodbury County Roadgrade Dam 36-86-42, located in Danbury, Iowa, is a crucial structure owned by the local government and regulated by the Iowa Department of Natural Resources. Completed in 1990, this earth dam stands at a height of 42 feet and stretches over 1000 feet in length, with a storage capacity of 540 acre-feet. The dam serves various purposes, including flood control and water resource management, particularly on the TR-Maple River.

With a significant hazard potential and a satisfactory condition assessment, Woodbury County Roadgrade Dam 36-86-42 plays a vital role in mitigating risks associated with potential flooding events in the region. The dam features an uncontrolled spillway with a width of 8 feet and undergoes regular inspections every five years to ensure its structural integrity and functionality. Despite its moderate risk assessment, the dam's risk management measures are not explicitly outlined, indicating a potential area for improvement in emergency preparedness and response protocols.