Erredge Group Detention, located in Zumbrota, Minnesota, is a private earth dam designed by the USDA NRCS in 1965 for the primary purpose of flood risk reduction along Bitter Creek. The dam stands at a height of 25 feet with a structural height of 28 feet and a length of 475 feet, providing a storage capacity of 97 acre-feet and a drainage area of 0.6 square miles. Despite being classified as having a significant hazard potential, the dam is currently in fair condition as of the last assessment in 2013.

Managed by the Minnesota Department of Natural Resources, Erredge Group Detention is regulated and inspected by the state, with enforcement and permitting responsibilities falling under the MNDNR EWR. The dam has an uncontrolled spillway and outlet gates, with a maximum discharge capacity of 340 cubic feet per second. While the dam has not undergone any modifications in recent years and lacks an Emergency Action Plan, it meets the guidelines for risk assessment and management, with a moderate risk rating of 3. As a vital infrastructure for flood risk reduction in the region, the dam serves as a crucial component in protecting the surrounding area from potential inundation events.