Plummer Basin Sw Clear Water Pond is an earth dam located in Itasca County, Minnesota, built in 1947. It carries a Low hazard potential classification.
Dam profile
NID height · 40 ft40 ft tall and 2,100 ft long, taller than 86% 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 Sw Clear Water Pond
The primary purpose of Plummer Basin Sw Clear Water Pond 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 (private). It impounds the Swan River-os near Taconite.
The dam stands 40 feet tall and stretches 2,100 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 120 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1947, the structure is well-established, with more than 75 years of service.
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 40 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | Minnesota |
| County | Itasca |
| Nearest City | Taconite |
| River/Stream | Swan River-os |
| Coordinates | 47.29316, -93.36472 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 2,100 ft |
| Year Completed | 1947 (79 years old) |
Storage & Hydraulics
| NID Storage | 120 acre-ft |
| Max Storage | 120 acre-ft |
| Normal Storage | 60 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 12 sq mi |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Tailings |
| Owner | Magnetation |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/02/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01634 |
| Federal ID | MN01634 |
| More Info | State Dam Safety Program |