Harrison Spillway Dam
Key Takeaway
Harrison Spillway Dam is classified as high hazard in New York. It was completed in 1918 and is 108 years old. Its primary use is navigation. 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 | 16 ft (taller than 42.9% in NY) |
| Dam Length | 647 ft |
| Dam Type | Concrete |
| Max Storage | 2.0K acre-ft |
| Normal Storage | 1.4K acre-ft |
| Surface Area | 145 acres |
| Drainage Area | 151 sq mi |
| Max Discharge | 8,390 cfs |
| Year Completed | 1918 (108 years old) |
| NID ID | NY17176 |
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 State Canal Corporation
State Government
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What is the hazard classification of Harrison Spillway Dam?
Harrison Spillway 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 Harrison Spillway Dam?
Harrison Spillway 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 Harrison Spillway Dam built?
Harrison Spillway Dam was completed in 1918, making it 108 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 Harrison Spillway Dam?
Harrison Spillway 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 Harrison Spillway Dam?
Harrison Spillway Dam has a dam height of 16 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 Harrison Spillway Dam last inspected?
Harrison Spillway Dam was last inspected on September 14, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.