Jackson Lake Dam
Key Takeaway
Jackson Lake Dam is classified as high hazard in Montana. It was completed in 1936 and is 90 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 | 32 ft (taller than 90.8% in MT) |
| Dam Length | 391 ft |
| Dam Type | Earth |
| Max Storage | 490 acre-ft |
| Normal Storage | 372 acre-ft |
| Surface Area | 36 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 210 cfs |
| Year Completed | 1936 (90 years old) |
| NID ID | MT00053 |
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
SCOTT JACKSON
Private
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What is the hazard classification of Jackson Lake Dam?
Jackson Lake Dam 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 Jackson Lake Dam?
Jackson Lake Dam is owned by SCOTT JACKSON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Jackson Lake Dam built?
Jackson Lake Dam was completed in 1936, making it 90 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 Jackson Lake Dam?
Jackson Lake 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 Jackson Lake Dam?
Jackson Lake Dam has a dam height of 32 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 Jackson Lake Dam last inspected?
Jackson Lake Dam was last inspected on April 8, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.