Big (Toole)
Key Takeaway
Big (Toole) is classified as low hazard in Montana. It was completed in 1900 and is 126 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 12 ft (taller than 9.2% in MT) |
| Dam Length | 390 ft |
| Dam Type | Earth |
| Max Storage | 105 acre-ft |
| Normal Storage | 21 acre-ft |
| Drainage Area | 7 sq mi |
| Max Discharge | 100 cfs |
| Year Completed | 1900 (126 years old) |
| NID ID | MT00391 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
HAROLD E. HENRY, ESTATE OF
Private
Nearby Dams
Berkholder Dam
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Low Hazard 24 ftBlair #1
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Low Hazard 27 ftSkari and Sons #1
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Low Hazard 10 ftLaas
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Low Hazard 15 ftHenry Dam #2
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Low Hazard 33 ftHofer 2
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Low Hazard 22 ftHofer 1
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Low Hazard 22 ftFrequently Asked Questions
What is the hazard classification of Big (Toole)?
Big (Toole) is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Big (Toole)?
Big (Toole) is owned by HAROLD E. HENRY, ESTATE OF (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Big (Toole) built?
Big (Toole) was completed in 1900, making it 126 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 Big (Toole)?
Big (Toole) 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 Big (Toole)?
Big (Toole) has a dam height of 12 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.