Horning-Festler Detention, located in Northfield, Minnesota, is a private earth dam designed by USDA NRCS to primarily reduce flood risks along the Cannon River. Completed in 1977, this structure stands at 26 feet in height and spans 513 feet in length, with a capacity to store up to 44 acre-feet of water. The dam's spillway type is listed as uncontrolled, with a maximum discharge capacity of 617 cubic feet per second.

Managed by the Minnesota Department of Natural Resources, this dam has been deemed to have a significant hazard potential, but with a satisfactory condition assessment as of September 2015. The structure undergoes inspections every four years, with the last inspection conducted in September 2019. While the risk assessment for Horning-Festler Detention is moderate, measures for risk management and emergency preparedness are not explicitly outlined in the available data. Overall, this dam plays a crucial role in mitigating flood risks in the area and serves as a vital component of water resource management in Rice County, Minnesota.