Tarrytown Waterworks Dam
Key Takeaway
Tarrytown Waterworks Dam is classified as high hazard in New York. It was completed in 1897 and is 129 years old. Its primary use is water supply. 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 | 18 ft (taller than 49.5% in NY) |
| Dam Length | 315 ft |
| Dam Type | Earth |
| Max Storage | 1.1K acre-ft |
| Normal Storage | 890 acre-ft |
| Surface Area | 81 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 590 cfs |
| Year Completed | 1897 (129 years old) |
| NID ID | NY00054 |
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
VILLAGE OF TARRYTOWN
Local Government
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High Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Tarrytown Waterworks Dam?
Tarrytown Waterworks 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 Tarrytown Waterworks Dam?
Tarrytown Waterworks Dam is owned by VILLAGE OF TARRYTOWN (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Tarrytown Waterworks Dam built?
Tarrytown Waterworks Dam was completed in 1897, making it 129 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 Tarrytown Waterworks Dam?
Tarrytown Waterworks Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Tarrytown Waterworks Dam?
Tarrytown Waterworks Dam has a dam height of 18 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 Tarrytown Waterworks Dam last inspected?
Tarrytown Waterworks Dam was last inspected on April 25, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.