First Reservoir Dam
Key Takeaway
First Reservoir Dam is classified as high hazard in New York. It was completed in 1917 and is 109 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 | 46 ft (taller than 90.9% in NY) |
| Dam Length | 650 ft |
| Dam Type | Earth |
| Max Storage | 116 acre-ft |
| Normal Storage | 68 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 2 sq mi |
| Year Completed | 1917 (109 years old) |
| NID ID | NY01531 |
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
NYSOPRHP - PALISADES INTERSTATE PARK COMMISSION
State Government
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Low Hazard 24 ftFrequently Asked Questions
What is the hazard classification of First Reservoir Dam?
First Reservoir 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 First Reservoir Dam?
First Reservoir Dam is owned by NYSOPRHP - PALISADES INTERSTATE PARK COMMISSION (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was First Reservoir Dam built?
First Reservoir Dam was completed in 1917, making it 109 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 First Reservoir Dam?
First Reservoir 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 First Reservoir Dam?
First Reservoir Dam has a dam height of 46 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 First Reservoir Dam last inspected?
First Reservoir Dam was last inspected on June 25, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.