Stoyanoff is an earth dam located in Meagher County, Montana, built in 1947. It carries a Low hazard potential classification.
Dam profile
NID height · 50 ft50 ft tall and 400 ft long, taller than 92% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Stoyanoff
The primary purpose of Stoyanoff is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Halmes Livestock Co., Gene Halmes (private). It impounds the Benton Gulch near Great Falls.
The dam stands 50 feet tall and stretches 400 feet across, has a maximum storage capacity of 575 acre-feet, and collects water from a drainage area of 24 square miles. Completed in 1947, the structure is well-established, with more than 75 years of service.
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 10/29/1993. That was over 32 years ago.
At 50 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Montana |
| County | Meagher |
| Nearest City | Great Falls |
| River/Stream | Benton Gulch |
| Coordinates | 46.69310, -111.26220 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 400 ft |
| Year Completed | 1947 (79 years old) |
Storage & Hydraulics
| NID Storage | 575 acre-ft |
| Max Storage | 575 acre-ft |
| Normal Storage | 392 acre-ft |
| Drainage Area | 24 sq mi |
| Max Discharge | 320 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Halmes Livestock Co., Gene Halmes |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/29/1993 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00051 |
| Federal ID | MT00051 |
| More Info | State Dam Safety Program |