Maffitt Reservoir Dam, located in Dallas County, Iowa, is a crucial infrastructure owned by a public utility and regulated by the Iowa Department of Natural Resources. Completed in 1944, this earth dam stands at a height of 79 feet and spans 1800 feet along the Raccoon River. Its primary purpose is to provide water supply, with a storage capacity of 6700 acre-feet and a normal storage level of 5200 acre-feet.

With a surface area of 230 acres and a drainage area of 1.41 square miles, Maffitt Reservoir Dam poses a high hazard potential but has been assessed as satisfactory in condition. The dam features an uncontrolled spillway with a width of 8 feet, and it is inspected every two years for safety and maintenance. Despite its age, the dam remains a critical component of the water infrastructure in the West Des Moines area, ensuring a reliable water supply for the local community while managing flood risk along the Raccoon River.