Carimona Detention, located in Fillmore, Minnesota, is a local government-owned Earth-type dam designed by USDA NRCS to mitigate flood risks along Willow Creek-TR. Completed in 1981, this 32-foot high structure serves primarily for flood risk reduction, with a storage capacity of 86.6 acre-feet and a normal storage of 3.5 acre-feet. Despite its low hazard potential and satisfactory condition assessment, Carimona Detention is regulated, permitted, inspected, and enforced by the Minnesota Department of Natural Resources - Environmental & Water Resources Division.

The dam, with a length of 390 feet and a drainage area of 0.7 square miles, features an uncontrolled spillway and outlet gates. It has a moderate risk assessment and has been subject to inspections every 8 years, with the last assessment conducted in April 2016. Although there are no associated structures or locks, Carimona Detention plays a crucial role in managing water resources in the region and ensuring the safety of nearby communities. With its strategic location in Preston and its vital role in flood risk reduction, this dam stands as a testament to the importance of sustainable water resource management in Minnesota.