Pishkun Dike 4
Key Takeaway
Pishkun Dike 4 is classified as high hazard in Montana. It was completed in 1931 and is 95 years old. Its primary use is irrigation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 30 ft (taller than 82.7% in MT) |
| Dam Length | 1,580 ft |
| Dam Type | Earth |
| Max Storage | 46.7K acre-ft |
| Normal Storage | 46.7K acre-ft |
| Surface Area | 1,550 acres |
| Year Completed | 1931 (95 years old) |
| NID ID | MT00575 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
RECLAMATION
Federal Government
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Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Pishkun Dike 4?
Pishkun Dike 4 is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Pishkun Dike 4?
Pishkun Dike 4 is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pishkun Dike 4 built?
Pishkun Dike 4 was completed in 1931, making it 95 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 Pishkun Dike 4?
Pishkun Dike 4 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 Pishkun Dike 4?
Pishkun Dike 4 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.
When was Pishkun Dike 4 last inspected?
Pishkun Dike 4 was last inspected on September 10, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.