Nspc Stage 2 Tailings
Nspc Stage 2 Tailings is an earth dam located in St. Louis County, Minnesota, built in 1978. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Nspc Stage 2 Tailings
The primary purpose of Nspc Stage 2 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 Us Steel (private). It impounds the Hay Creek-os near Pengilly.
The dam stands 70 feet tall and stretches 25,300 feet across, has a maximum storage capacity of 10,000 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1978, the structure is 48 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 09/29/2021.
At 70 feet, this dam is taller than 96% of all dams in the United States.
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Location
| State | Minnesota |
| County | St. Louis |
| Nearest City | Pengilly |
| River/Stream | Hay Creek-os |
| Coordinates | 47.33774, -93.06190 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 70 ft |
| Dam Height | 60 ft |
| Dam Length | 25,300 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 10,000 acre-ft |
| Max Storage | 10,000 acre-ft |
| Normal Storage | 2,100 acre-ft |
| Drainage Area | 9 sq mi |
Ownership & Safety
| Purpose | Tailings |
| Owner | US Steel |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/29/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00801 |
| Federal ID | MN00801 |
| More Info | State Dam Safety Program |