Jackson Mills
Key Takeaway
Jackson Mills is classified as significant hazard in New Hampshire. It was completed in 1920 and is 106 years old. Its primary use is hydroelectric. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 33 ft (taller than 89.6% in NH) |
| Dam Length | 330 ft |
| Dam Type | Concrete |
| Max Storage | 150 acre-ft |
| Normal Storage | 150 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 529 sq mi |
| Max Discharge | 36,795 cfs |
| Year Completed | 1920 (106 years old) |
| NID ID | NH00121 |
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
City of Nashua, NH
Local Government
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What is the hazard classification of Jackson Mills?
Jackson Mills 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 Jackson Mills?
Jackson Mills is owned by City of Nashua, NH (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Jackson Mills built?
Jackson Mills was completed in 1920, making it 106 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 Jackson Mills?
Jackson Mills 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 Jackson Mills?
Jackson Mills 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 Jackson Mills last inspected?
Jackson Mills was last inspected on August 24, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.