Phantom Coulee Reservoir is an earth dam located in Chouteau County, Montana, built in 1906. It carries a Significant hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 250 ft long, taller than 50% 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 Phantom Coulee Reservoir
The primary purpose of Phantom Coulee 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 John/edwinna Engellant (private). It impounds the Phantom Coulee near Virgelle.
The dam stands 25 feet tall and stretches 250 feet across, has a maximum storage capacity of 756 acre-feet, and collects water from a drainage area of 22 square miles. Completed in 1906, the structure is over a century 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 | Chouteau |
| Nearest City | Virgelle |
| River/Stream | Phantom Coulee |
| Coordinates | 47.60280, -110.14650 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 250 ft |
| Year Completed | 1906 (120 years old) |
Storage & Hydraulics
| NID Storage | 756 acre-ft |
| Max Storage | 756 acre-ft |
| Normal Storage | 163 acre-ft |
| Drainage Area | 22 sq mi |
| Max Discharge | 130 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | John/edwinna Engellant |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03367 |
| Federal ID | MT03367 |
| More Info | State Dam Safety Program |