Georgetown Dam
Key Takeaway
Georgetown Dam is classified as high hazard in Montana. It was completed in 1900 and is 126 years old. Its primary use is hydroelectric. 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 | 55 ft (taller than 97.2% in MT) |
| Dam Length | 525 ft |
| Max Storage | 77.5K acre-ft |
| Normal Storage | 31.0K acre-ft |
| Surface Area | 2,850 acres |
| Max Discharge | 1,400 cfs |
| Year Completed | 1900 (126 years old) |
| NID ID | MT00225 |
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
Granite County Montana
Local Government
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Low Hazard 9 ftFrequently Asked Questions
What is the hazard classification of Georgetown Dam?
Georgetown 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 Georgetown Dam?
Georgetown Dam is owned by Granite County Montana (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Georgetown Dam built?
Georgetown Dam was completed in 1900, making it 126 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 Georgetown Dam?
Georgetown Dam serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Georgetown Dam?
Georgetown Dam has a dam height of 55 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 Georgetown Dam last inspected?
Georgetown Dam was last inspected on July 22, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.