Black River Dam is an earth dam located in Allegan County, Michigan, built in 1967. It carries a Low hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 550 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 irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Harold J. & Martha Hamlin (private). It impounds the Trib to N Fork Black River near Hawks Head.
The dam stands 18 feet tall and stretches 550 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 54 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1967, 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 11/16/1967. That was over 58 years ago.
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Location
| State | Michigan |
| County | Allegan |
| Nearest City | Hawks Head |
| River/Stream | Trib to N Fork Black River |
| Coordinates | 42.49302, -86.19548 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 550 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 40 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 280 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Harold J. & Martha Hamlin |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/16/1967 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00423 |
| Federal ID | MI00423 |
| More Info | State Dam Safety Program |