Blenheim - Gilboa Upper
Key Takeaway
Blenheim - Gilboa Upper is classified as high hazard in New York. It was completed in 1974 and is 52 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 | 110 ft (taller than 98.9% in NY) |
| Dam Length | 11,900 ft |
| Dam Type | Earth |
| Max Storage | 18.5K acre-ft |
| Normal Storage | 18.4K acre-ft |
| Surface Area | 355 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 10,200 cfs |
| Year Completed | 1974 (52 years old) |
| NID ID | NY00691 |
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
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Significant Hazard 24 ftFrequently Asked Questions
What is the hazard classification of Blenheim - Gilboa Upper?
Blenheim - Gilboa Upper 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 Blenheim - Gilboa Upper?
Blenheim - Gilboa Upper is owned by New York Power Authority (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Blenheim - Gilboa Upper built?
Blenheim - Gilboa Upper was completed in 1974, making it 52 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 Blenheim - Gilboa Upper?
Blenheim - Gilboa Upper serves the following purposes: Hydroelectric, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Blenheim - Gilboa Upper?
Blenheim - Gilboa Upper has a dam height of 110 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 Blenheim - Gilboa Upper last inspected?
Blenheim - Gilboa Upper was last inspected on May 24, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.