Perry-wyman Tailings is an earth dam located in Itasca County, Minnesota, built in 1949. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 35 ft35 ft tall and 2,400 ft long, taller than 80% 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 Perry-wyman Tailings
The primary purpose of Perry-wyman 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 Swan River-tr near Local Residents.
The dam stands 35 feet tall and stretches 2,400 feet across, has a maximum storage capacity of 300 acre-feet, and collects water from a drainage area of 7 square miles. Completed in 1949, 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 09/17/2017.
At 35 feet, this dam is taller than 80% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Minnesota |
| County | Itasca |
| Nearest City | Local Residents |
| River/Stream | Swan River-tr |
| Coordinates | 47.40357, -93.13169 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 2,400 ft |
| Year Completed | 1949 (77 years old) |
Storage & Hydraulics
| NID Storage | 300 acre-ft |
| Max Storage | 300 acre-ft |
| Normal Storage | 100 acre-ft |
| Drainage Area | 7 sq mi |
Ownership & Safety
| Purpose | Tailings |
| Owner | US Steel |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 09/17/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00777 |
| Federal ID | MN00777 |
| More Info | State Dam Safety Program |