Black River Dam is an earth dam located in Gogebic County, Michigan, built in 1947. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 15 ft15 ft tall and 150 ft long. 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 Black River Dam
The primary purpose of Black River Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mdnr Fisheries (state). It impounds the Black River near Ramsay.
The dam stands 15 feet tall and stretches 150 feet across, creates a reservoir covering 110 acres, has a maximum storage capacity of 660 acre-feet, and collects water from a drainage area of 8 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 10/11/2017.
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Location
| State | Michigan |
| County | Gogebic |
| Nearest City | Ramsay |
| River/Stream | Black River |
| Coordinates | 46.34000, -90.05500 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 150 ft |
| Year Completed | 1947 (79 years old) |
Storage & Hydraulics
| NID Storage | 660 acre-ft |
| Max Storage | 660 acre-ft |
| Normal Storage | 480 acre-ft |
| Surface Area | 110 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 570 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Mdnr Fisheries |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/11/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00071 |
| Federal ID | MI00071 |
| More Info | State Dam Safety Program |