Spooner Group Detention is an earth dam located in Winona County, Minnesota, built in 1986. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 38 ft38 ft tall and 400 ft long, taller than 84% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Spooner Group Detention
The primary purpose of Spooner Group Detention is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Crigler, James (private). It impounds the Gilmore Creek near Winona.
The dam stands 38 feet tall and stretches 400 feet across, has a maximum storage capacity of 59 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1986, the structure is 40 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/23/2018.
At 38 feet, this dam is taller than 84% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Minnesota |
| County | Winona |
| Nearest City | Winona |
| River/Stream | Gilmore Creek |
| Coordinates | 44.01270, -91.69534 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 400 ft |
| Year Completed | 1986 (40 years old) |
Storage & Hydraulics
| NID Storage | 59 acre-ft |
| Max Storage | 59 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 586 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Crigler, James |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/23/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01532 |
| Federal ID | MN01532 |
| More Info | State Dam Safety Program |