Bn #3 is an earth dam located in Rosebud County, Montana, built in 1966. It carries a Low hazard potential classification.
Dam profile
NID height · 33 ft33 ft tall and 225 ft long, taller than 76% 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 Bn #3
The primary purpose of Bn #3 is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Burlington Northern Rr (private). It impounds the Tr-muggins Creek near Sanders.
The dam stands 33 feet tall and stretches 225 feet across, has a maximum storage capacity of 105 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1966, 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.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Montana |
| County | Rosebud |
| Nearest City | Sanders |
| River/Stream | Tr-muggins Creek |
| Coordinates | 46.64280, -107.51960 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 225 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 105 acre-ft |
| Max Storage | 105 acre-ft |
| Normal Storage | 51 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 800 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Burlington Northern Rr |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02026 |
| Federal ID | MT02026 |
| More Info | State Dam Safety Program |