Arthun Dam
Key Takeaway
Arthun Dam is classified as significant hazard in Montana. It was completed in 1956 and is 70 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 23 ft (taller than 66.4% in MT) |
| Dam Length | 155 ft |
| Dam Type | Earth |
| Max Storage | 186 acre-ft |
| Normal Storage | 89 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 200 cfs |
| Year Completed | 1956 (70 years old) |
| NID ID | MT00331 |
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
LEN ARTHUN
Private
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Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Arthun Dam?
Arthun Dam 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 Arthun Dam?
Arthun Dam is owned by LEN ARTHUN (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Arthun Dam built?
Arthun Dam was completed in 1956, making it 70 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 Arthun Dam?
Arthun Dam serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Arthun Dam?
Arthun Dam has a dam height of 23 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.