Post Group Detention is an earth dam located in Murray County, Minnesota, built in 1974. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 39 ft39 ft tall, taller than 85% 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 Post Group Detention
The primary purpose of Post 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 Post Group;sorenson, Heidi (private). It impounds the Chanarambie River-tr near Edgerton.
The dam stands 39 feet tall, has a maximum storage capacity of 177 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1974, the structure is well into its service life at over 50 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 03/31/2017.
At 39 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Minnesota |
| County | Murray |
| Nearest City | Edgerton |
| River/Stream | Chanarambie River-tr |
| Coordinates | 43.92822, -95.98364 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 34 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 177 acre-ft |
| Max Storage | 177 acre-ft |
| Normal Storage | 79 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 71 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Post Group;sorenson, Heidi |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 03/31/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00852 |
| Federal ID | MN00852 |
| More Info | State Dam Safety Program |