Phantom Coulee Reservoir
Phantom Coulee Reservoir is an earth dam located in Chouteau County, Montana, built in 1906. It carries a Significant hazard potential classification.
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 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03367 |
| Federal ID | MT03367 |
| More Info | State Dam Safety Program |