Gartside
Key Takeaway
Gartside is classified as high hazard in Montana. It was completed in 1962 and is 64 years old. Its primary use is recreation. 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 | 31 ft (taller than 90.2% in MT) |
| Dam Length | 1,350 ft |
| Dam Type | Earth |
| Max Storage | 872 acre-ft |
| Normal Storage | 326 acre-ft |
| Surface Area | 41 acres |
| Drainage Area | 33 sq mi |
| Max Discharge | 13,040 cfs |
| Year Completed | 1962 (64 years old) |
| NID ID | MT00349 |
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
STATE OF MONTANA, D.F.W.P.
State Government
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Low Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Gartside?
Gartside 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 Gartside?
Gartside is owned by STATE OF MONTANA, D.F.W.P. (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Gartside built?
Gartside was completed in 1962, making it 64 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 Gartside?
Gartside serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Gartside?
Gartside has a dam height of 31 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 Gartside last inspected?
Gartside was last inspected on September 26, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.