South Fork Reservoir is an earth dam located in Silver Bow County, Montana, built in 1946. It carries a Significant hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 600 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 South Fork Reservoir
The primary purpose of South Fork Reservoir 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 Butte-silver Bow (local government). It impounds the Divide Creek near Buxton.
The dam stands 20 feet tall and stretches 600 feet across, and has a maximum storage capacity of 51 acre-feet. Completed in 1946, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | Montana |
| County | Silver Bow |
| Nearest City | Buxton |
| River/Stream | Divide Creek |
| Coordinates | 45.85732, -112.74918 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 600 ft |
| Year Completed | 1946 (80 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 26 acre-ft |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Butte-silver Bow |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03725 |
| Federal ID | MT03725 |
| More Info | State Dam Safety Program |