Republic Mine Tailings Pond Dam B is an earth dam located in Marquette County, Michigan, built in 1960. It carries a Low hazard potential classification.
Dam profile
NID height · 42 ft42 ft tall and 12,320 ft long, taller than 88% 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 Republic Mine Tailings Pond Dam B
The primary purpose of Republic Mine Tailings Pond Dam B 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 Marquette Iron Mining Partnership (private). It impounds the Tributary to Michigamme River near Republic.
The dam stands 42 feet tall and stretches 12,320 feet across, creates a reservoir covering 288 acres, and has a maximum storage capacity of 5,000 acre-feet. Completed in 1960, 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. The most recent inspection on record was 01/01/1901. That was over 125 years ago.
At 42 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Michigan |
| County | Marquette |
| Nearest City | Republic |
| River/Stream | Tributary to Michigamme River |
| Coordinates | 46.37167, -87.95333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 12,320 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 5,000 acre-ft |
| Max Storage | 5,000 acre-ft |
| Normal Storage | 4,500 acre-ft |
| Surface Area | 288 acres |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Tailings |
| Owner | Marquette Iron Mining Partnership |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 01/01/1901 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00568 |
| Federal ID | MI00568 |
| More Info | State Dam Safety Program |