Meggison Dam is a privately owned structure located in Dallas, Iowa, along the TR-North Raccoon River. Built in 1977 by the USDA NRCS, this earth dam stands at a height of 30 feet and spans 280 feet in length, providing storage of 20 acre-feet and serving purposes such as fire protection, stock, and small fish pond management. Situated in the Rock Island District, the dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections to ensure its integrity and safety.

With a low hazard potential and a moderate risk assessment rating, Meggison Dam is deemed to be in satisfactory condition, although it has not been formally rated. The dam features an uncontrolled spillway type and is designed to handle moderate discharges. While no emergency action plan (EAP) is currently in place, the structure meets regulatory guidelines and is equipped to manage potential risks associated with its operation. Despite its relatively small size, Meggison Dam plays a crucial role in water resource management and environmental conservation efforts in the region, highlighting the importance of private ownership in maintaining critical infrastructure for sustainable development.