Croy Subwatershed Site A3-1050, located in Monona, Iowa, is a key water resource managed by the local government and regulated by the Iowa Department of Natural Resources. Built in 1951 by the USDA NRCS, this earth dam stands at a height of 30 feet and serves multiple purposes including fire protection, livestock management, and small fish pond creation. With a storage capacity of 92 acre-feet, the dam covers a surface area of 4 acres and drains a watershed area of 0.57 square miles along the TR-Maple River.

Despite its low hazard potential, the dam at Croy Subwatershed Site A3-1050 is considered to have a moderate risk level. The condition assessment is currently not rated, and there is no documented emergency action plan in place. The spillway type is uncontrolled, with no outlet gates or locks present. It is important for water resource and climate enthusiasts to monitor and assess the risk management measures for this dam, as it plays a crucial role in flood risk reduction and water storage in the region.