Long Sault
Key Takeaway
Long Sault is classified as high hazard in New York. It was completed in 1958 and is 68 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 | 104 ft (taller than 98.6% in NY) |
| Dam Length | 2,960 ft |
| Dam Type | Concrete |
| Max Storage | 803.0K acre-ft |
| Normal Storage | 750.0K acre-ft |
| Surface Area | 37,500 acres |
| Drainage Area | 300,000 sq mi |
| Max Discharge | 1,250,000 cfs |
| Year Completed | 1958 (68 years old) |
| NID ID | NY00677 |
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
New York Power Authority
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Long Sault?
Long Sault 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 Long Sault?
Long Sault is owned by New York Power Authority (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Long Sault built?
Long Sault was completed in 1958, making it 68 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 Long Sault?
Long Sault serves the following purposes: Hydroelectric, Navigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Long Sault?
Long Sault has a dam height of 104 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 Long Sault last inspected?
Long Sault was last inspected on August 3, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.