Frenchman Ir. Company #1 is an earth dam located in Phillips County, Montana, built in 1951. It carries a Significant hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 100 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 Frenchman Ir. Company #1
The primary purpose of Frenchman Ir. Company #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by William G Brookie (private). It impounds the Tr-milk River near Hinsdale.
The dam stands 10 feet tall and stretches 100 feet across, and has a maximum storage capacity of 471 acre-feet. Completed in 1951, the structure is well into its service life at over 50 years old.
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 | Phillips |
| Nearest City | Hinsdale |
| River/Stream | Tr-milk River |
| Coordinates | 48.55090, -107.39884 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 100 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 471 acre-ft |
| Max Storage | 471 acre-ft |
| Normal Storage | 162 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | William G Brookie |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01304 |
| Federal ID | MT01304 |
| More Info | State Dam Safety Program |