Iowa Noname16 is a privately-owned dam located in Guthrie County, Iowa, along the South Raccoon River. Built in 1968 by the USDA NRCS, this earth dam serves multiple purposes including fire protection, stock watering, and recreational activities. With a height of 34 feet and a length of 1046 feet, the dam has a storage capacity of 4000 acre-feet and covers a surface area of 13 acres.

Managed by the Iowa Department of Natural Resources, Iowa Noname16 is regulated, permitted, inspected, and enforced by state authorities to ensure its safe operation. Despite having a low hazard potential, the dam is classified as having a moderate risk level, indicating the need for ongoing risk assessment and management measures. The dam's spillway is uncontrolled, and there are no outlet gates or locks associated with the structure.

Located within the Rock Island District, Iowa Noname16 plays a crucial role in water resource management and climate resilience in the region. Water enthusiasts and climate advocates can appreciate the dam's contribution to fire protection, wildlife habitat, and recreational opportunities along the TR-Long Branch stream. As efforts continue to assess and address potential risks associated with the dam, its significance in the local ecosystem and community remains an important focus for conservation and sustainability efforts.