Hannawa
Key Takeaway
Hannawa is classified as low hazard in New York. It was completed in 1902 and is 124 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 34 ft (taller than 83% in NY) |
| Dam Length | 255 ft |
| Dam Type | Gravity |
| Max Storage | 690 acre-ft |
| Normal Storage | 690 acre-ft |
| Surface Area | 204 acres |
| Drainage Area | 993 sq mi |
| Max Discharge | 12,700 cfs |
| Year Completed | 1902 (124 years old) |
| NID ID | NY00250 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Erie Boulevard Hydropower, L.P.
Private
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Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Hannawa?
Hannawa is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Hannawa?
Hannawa is owned by Erie Boulevard Hydropower, L.P. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hannawa built?
Hannawa was completed in 1902, making it 124 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 Hannawa?
Hannawa serves the following purposes: Hydroelectric, Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Hannawa?
Hannawa has a dam height of 34 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 Hannawa last inspected?
Hannawa was last inspected on May 13, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.