Thompson Island Dam
Key Takeaway
Thompson Island Dam is classified as low hazard in New York. It was completed in 1910 and is 116 years old. Its primary use is navigation.
Physical Details
| Dam Height | 15 ft (taller than 37.1% in NY) |
| Dam Length | 736 ft |
| Dam Type | Concrete |
| Max Storage | 1.0K acre-ft |
| Normal Storage | 1.0K acre-ft |
| Surface Area | 36 acres |
| Drainage Area | 3,440 sq mi |
| Year Completed | 1910 (116 years old) |
| NID ID | NY01074 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
New York State Canal Corporation
State Government
Nearby Dams
Fort Miller
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Low Hazard 7 ftNorthumberland Dam
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Low Hazard 16 ftClarks Mills Lower
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Low Hazard 20 ftClark Mills Upper
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Low Hazard 23 ftSchuylerville
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High Hazard 43 ftWinnies Reef Dam
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Significant Hazard 16 ftMiddle Falls
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Low Hazard 12 ftHudson Falls
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Significant Hazard 17 ftFrequently Asked Questions
What is the hazard classification of Thompson Island Dam?
Thompson Island Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Thompson Island Dam?
Thompson Island Dam is owned by New York State Canal Corporation (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Thompson Island Dam built?
Thompson Island Dam was completed in 1910, making it 116 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 Thompson Island Dam?
Thompson Island Dam serves the following purposes: Navigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Thompson Island Dam?
Thompson Island Dam has a dam height of 15 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 Thompson Island Dam last inspected?
Thompson Island Dam was last inspected on August 27, 1971. Inspection dates indicate when a formal review occurred, not the results of that inspection.