Hunner Tailings
Hunner Tailings is an earth dam located in Itasca County, Minnesota, built in 1956. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Hunner Tailings
The primary purpose of Hunner Tailings is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by County Of Itasca (local government). It impounds the Prairie River-os near La Prairie.
The dam stands 25 feet tall and stretches 8,800 feet across, has a maximum storage capacity of 3,750 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1956, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 10/15/2014. That was over 11 years ago.
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Location
| State | Minnesota |
| County | Itasca |
| Nearest City | La Prairie |
| River/Stream | Prairie River-os |
| Coordinates | 47.32173, -93.48494 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 8,800 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 3,750 acre-ft |
| Max Storage | 3,750 acre-ft |
| Normal Storage | 1,500 acre-ft |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Tailings |
| Owner | County of Itasca |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/15/2014 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00774 |
| Federal ID | MN00774 |
| More Info | State Dam Safety Program |