Wanken
Key Takeaway
Wanken is classified as significant hazard in Montana. It was completed in 1928 and is 98 years old. Its primary use is fire protection. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 30 ft (taller than 82.7% in MT) |
| Dam Length | 310 ft |
| Dam Type | Earth |
| Max Storage | 185 acre-ft |
| Normal Storage | 107 acre-ft |
| Year Completed | 1928 (98 years old) |
| NID ID | MT00389 |
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
WANKEN FARMS
Private
Nearby Dams
The Moonspinner
Toole, MT
Low Hazard 25 ftEd Mcintyre
Toole, MT
Low Hazard 15 ftAlkali Flat
Toole, MT
Low Hazard 25 ftCowpath Dam
Toole, MT
High Hazard 49 ftSullivan Dam
Toole, MT
High Hazard 49 ftShelby Sewage Lagoon
Toole, MT
Low Hazard 10 ftKeil Ranch Reservoir #1
Pondera, MT
Low Hazard 30 ftWilson #2 (Toole)
Toole, MT
Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Wanken?
Wanken 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 Wanken?
Wanken is owned by WANKEN FARMS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Wanken built?
Wanken was completed in 1928, making it 98 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 Wanken?
Wanken 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 Wanken?
Wanken has a dam height of 30 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.