Jackman Reservoir Dam
Key Takeaway
Jackman Reservoir Dam is classified as high hazard in New Hampshire. It was completed in 1926 and is 100 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 | 43 ft (taller than 93.4% in NH) |
| Dam Length | 1,844 ft |
| Dam Type | Earth |
| Max Storage | 12.4K acre-ft |
| Normal Storage | 8.7K acre-ft |
| Surface Area | 519 acres |
| Drainage Area | 63 sq mi |
| Year Completed | 1926 (100 years old) |
| NID ID | NH00199 |
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
CENTRAL RIVERS POWER NH LLC
Private
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What is the hazard classification of Jackman Reservoir Dam?
Jackman 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 Jackman Reservoir Dam?
Jackman Reservoir Dam is owned by CENTRAL RIVERS POWER NH LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Jackman Reservoir Dam built?
Jackman Reservoir Dam was completed in 1926, making it 100 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 Jackman Reservoir Dam?
Jackman Reservoir Dam serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Jackman Reservoir Dam?
Jackman Reservoir Dam has a dam height of 43 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 Jackman Reservoir Dam last inspected?
Jackman Reservoir Dam was last inspected on October 3, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.