Turkey Cr Watershed Site 55-D, located in Cass County, Iowa, is a significant earth dam constructed in 1994 by the USDA NRCS to primarily reduce flood risks in the area. With a height of 42 feet and a length of 900 feet, this dam has a storage capacity of 1174 acre-feet and serves a drainage area of 2.7 square miles along the TR-Turkey Creek. The dam's purpose extends beyond flood risk reduction to include fire protection, stock, and small fish pond maintenance.

Managed and regulated by the Iowa Department of Natural Resources, Turkey Cr Watershed Site 55-D is considered to have a significant hazard potential but is currently in satisfactory condition as per its last assessment in June 2019. The dam has a spillway width of 3 feet and is uncontrolled, making it crucial for managing excess water during heavy rainfall events. Despite its moderate risk rating, the dam's overall risk management measures and emergency action plan status are not clearly defined, indicating a potential area for improvement to enhance its resilience and response capabilities in case of emergencies.