Lake Bella in Nobles, Minnesota, is a local government-owned earth dam designed by USDA NRCS and completed in 1971 for flood risk reduction on the Ocheydan River. The dam stands at a height of 28 feet with a hydraulic height of 22 feet, helping to store a maximum of 3,220 acre-feet of water to mitigate potential flooding in the area. With a drainage area of 67 square miles, Lake Bella has a low hazard potential and is classified as having a satisfactory condition.

Managed by the Minnesota Department of Natural Resources, Lake Bella's primary purpose is flood risk reduction, with uncontrolled spillways and outlets. The dam is regularly inspected, with the last assessment conducted in June 2020, noting a moderate risk level. Located in a beautiful natural setting, Lake Bella serves as a vital infrastructure for water resource management and climate resilience in the region, contributing to the overall environmental health and safety of the surrounding community.