Empire Mine Secondary Pond Dam is an earth dam located in Marquette County, Michigan, built in 1975. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 30 ft30 ft tall and 850 ft long, taller than 68% 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 Empire Mine Secondary Pond Dam
Empire Mine Secondary Pond Dam is a dam in Marquette, Michigan. The dam is owned by Empire Iron Mining Partnership (private). It impounds the Green Creek near Gwinn.
The dam stands 30 feet tall and stretches 850 feet across, creates a reservoir covering 42 acres, and has a maximum storage capacity of 5,800 acre-feet. Completed in 1975, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 09/01/2016. That was over 10 years ago.
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Location
| State | Michigan |
| County | Marquette |
| Nearest City | Gwinn |
| River/Stream | Green Creek |
| Coordinates | 46.38333, -87.63333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 850 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 5,800 acre-ft |
| Max Storage | 5,800 acre-ft |
| Normal Storage | 5,000 acre-ft |
| Surface Area | 42 acres |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | Empire Iron Mining Partnership |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/01/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00720 |
| Federal ID | MI00720 |
| More Info | State Dam Safety Program |