Black Wolff #3 is an earth dam located in Carter County, Montana, built in 1964. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 300 ft long, taller than 50% 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 Black Wolff #3
The primary purpose of Black Wolff #3 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Donald Wolff (private). It impounds the Box Elder Creek near Marmarth North Dakota.
The dam stands 25 feet tall and stretches 300 feet across, and has a maximum storage capacity of 229 acre-feet. Completed in 1964, 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.
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Location
| State | Montana |
| County | Carter |
| Nearest City | Marmarth North Dakota |
| River/Stream | Box Elder Creek |
| Coordinates | 45.63170, -104.41740 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 300 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 229 acre-ft |
| Max Storage | 229 acre-ft |
| Normal Storage | 50 acre-ft |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Donald Wolff |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02930 |
| Federal ID | MT02930 |
| More Info | State Dam Safety Program |