Hadley Falls
Key Takeaway
Hadley Falls is classified as significant hazard in New Hampshire. It was completed in 1922 and is 104 years old. Its primary use is hydroelectric. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 20 ft (taller than 70.9% in NH) |
| Dam Length | 230 ft |
| Dam Type | Concrete |
| Max Storage | 150 acre-ft |
| Normal Storage | 150 acre-ft |
| Surface Area | 24 acres |
| Drainage Area | 197 sq mi |
| Max Discharge | 6,620 cfs |
| Year Completed | 1922 (104 years old) |
| NID ID | NH00020 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
State Government
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Low Hazard 8 ftFrequently Asked Questions
What is the hazard classification of Hadley Falls?
Hadley Falls is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Hadley Falls?
Hadley Falls is owned by information not available (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hadley Falls built?
Hadley Falls was completed in 1922, making it 104 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 Hadley Falls?
Hadley Falls serves the following purposes: Hydroelectric, Fire Protection, Stock, Or Small Fish Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Hadley Falls?
Hadley Falls has a dam height of 20 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 Hadley Falls last inspected?
Hadley Falls was last inspected on May 25, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.