Onwatt
Key Takeaway
Onwatt is classified as low hazard in Montana. It was completed in 1932 and is 94 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 20 ft (taller than 44.5% in MT) |
| Dam Length | 200 ft |
| Dam Type | Earth |
| Max Storage | 81 acre-ft |
| Normal Storage | 28 acre-ft |
| Year Completed | 1932 (94 years old) |
| NID ID | MT02559 |
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
DON WATERS
Private
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Low Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Onwatt?
Onwatt 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 Onwatt?
Onwatt is owned by DON WATERS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Onwatt built?
Onwatt was completed in 1932, making it 94 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 Onwatt?
Onwatt 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 Onwatt?
Onwatt has a dam height of 20 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.