Phantom Coulee Reservoir
Key Takeaway
Phantom Coulee Reservoir is classified as significant hazard in Montana. It was completed in 1906 and is 120 years old. Its primary use is fire protection. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 25 ft (taller than 70.3% in MT) |
| Dam Length | 250 ft |
| Dam Type | Earth |
| Max Storage | 756 acre-ft |
| Normal Storage | 163 acre-ft |
| Drainage Area | 23 sq mi |
| Max Discharge | 130 cfs |
| Year Completed | 1906 (120 years old) |
| NID ID | MT03367 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
JOHN/EDWINNA ENGELLANT
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Phantom Coulee Reservoir?
Phantom Coulee Reservoir is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Phantom Coulee Reservoir?
Phantom Coulee Reservoir is owned by JOHN/EDWINNA ENGELLANT (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Phantom Coulee Reservoir built?
Phantom Coulee Reservoir was completed in 1906, making it 120 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Phantom Coulee Reservoir?
Phantom Coulee Reservoir serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Phantom Coulee Reservoir?
Phantom Coulee Reservoir has a dam height of 25 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.