Plummer Basin W Tailings is an earth dam located in Itasca County, Minnesota, built in 2015. It carries a Low hazard potential classification.
Dam profile
NID height · 45 ft45 ft tall and 10,670 ft long, taller than 90% 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 Plummer Basin W Tailings
The primary purpose of Plummer Basin W 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 Magnetation LLC (private).
The dam stands 45 feet tall and stretches 10,670 feet across, creates a reservoir covering 330 acres, has a maximum storage capacity of 8,250 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2015, the structure is relatively new.
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. The most recent inspection on record was 06/02/2016. That was over 10 years ago.
At 45 feet, this dam is taller than 90% of dams nationwide.
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Location
| State | Minnesota |
| County | Itasca |
| Nearest City | Taconite |
| Coordinates | 47.29844, -93.36230 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 45 ft |
| Dam Height | 45 ft |
| Dam Length | 10,670 ft |
| Year Completed | 2015 (11 years old) |
Storage & Hydraulics
| NID Storage | 8,250 acre-ft |
| Max Storage | 8,250 acre-ft |
| Surface Area | 330 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Tailings |
| Owner | Magnetation LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/02/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01667 |
| Federal ID | MN01667 |
| More Info | State Dam Safety Program |