Cornwall Upper Reservoir Dam
Key Takeaway
Cornwall Upper Reservoir Dam is classified as high hazard in New York. It was completed in 1912 and is 114 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 | 33 ft (taller than 82.3% in NY) |
| Dam Length | 565 ft |
| Dam Type | Earth |
| Max Storage | 222 acre-ft |
| Normal Storage | 193 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1912 (114 years old) |
| NID ID | NY00604 |
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 CORNWALL-ON-HUDSON
Local Government
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High Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Cornwall Upper Reservoir Dam?
Cornwall Upper 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 Cornwall Upper Reservoir Dam?
Cornwall Upper Reservoir Dam is owned by VILLAGE OF CORNWALL-ON-HUDSON (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Cornwall Upper Reservoir Dam built?
Cornwall Upper Reservoir Dam was completed in 1912, making it 114 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 Cornwall Upper Reservoir Dam?
Cornwall Upper 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 Cornwall Upper Reservoir Dam?
Cornwall Upper Reservoir Dam has a dam height of 33 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 Cornwall Upper Reservoir Dam last inspected?
Cornwall Upper Reservoir Dam was last inspected on October 23, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.