Nefsy #3 is an earth dam located in Prairie County, Montana, built in 1953. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 350 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 Nefsy #3
The primary purpose of Nefsy #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 State of Montana, D.n.r.c., T.l.m.d. (state). It impounds the West Fork Brackett Creek near Fallon.
The dam stands 15 feet tall and stretches 350 feet across, and has a maximum storage capacity of 271 acre-feet. Completed in 1953, 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 | Prairie |
| Nearest City | Fallon |
| River/Stream | West Fork Brackett Creek |
| Coordinates | 46.96820, -105.38940 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 350 ft |
| Year Completed | 1953 (73 years old) |
Storage & Hydraulics
| NID Storage | 271 acre-ft |
| Max Storage | 271 acre-ft |
| Normal Storage | 139 acre-ft |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | State of Montana, D.n.r.c., T.l.m.d. |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02326 |
| Federal ID | MT02326 |
| More Info | State Dam Safety Program |