Jackson #1
Key Takeaway
Jackson #1 is classified as significant hazard in Montana. It was completed in 1924 and is 102 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 19 ft (taller than 42.9% in MT) |
| Dam Length | 202 ft |
| Dam Type | Earth |
| Normal Storage | 38 acre-ft |
| Surface Area | 4 acres |
| Year Completed | 1924 (102 years old) |
| NID ID | MT00828 |
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
UNKNOWN
Not Listed
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High Hazard 80 ftFrequently Asked Questions
What is the hazard classification of Jackson #1?
Jackson #1 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 Jackson #1?
Jackson #1 is owned by UNKNOWN (Not Listed). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Jackson #1 built?
Jackson #1 was completed in 1924, making it 102 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 #1?
Jackson #1 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 #1?
Jackson #1 has a dam height of 19 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 #1 last inspected?
Jackson #1 was last inspected on July 16, 2014. Inspection dates indicate when a formal review occurred, not the results of that inspection.