Mountain Brook Reservoir Dam
Key Takeaway
Mountain Brook Reservoir Dam is classified as significant hazard in New Hampshire. It was completed in 1951 and is 75 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 18 ft (taller than 63.5% in NH) |
| Dam Length | 265 ft |
| Dam Type | Earth |
| Max Storage | 2.7K acre-ft |
| Normal Storage | 266 acre-ft |
| Surface Area | 91 acres |
| Drainage Area | 14 sq mi |
| Max Discharge | 3,150 cfs |
| Year Completed | 1951 (75 years old) |
| NID ID | NH00099 |
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
TOWN OF JAFFREY
Local Government
Nearby Dams
Contoocook Lake Dam
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Low Hazard 7 ftContoocook River Dam
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Significant Hazard 15 ftCheshire
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Low Hazard 13 ftJaffrey Sewage Lagoon Dam
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Significant Hazard 25 ftBlack Reservoir Dam
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Significant Hazard 10 ftPearly Pond Dam
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Low Hazard 7 ftCrowcroft Pond Dam
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Low Hazard 10 ftHubbard Pond Dam & Dike
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Significant Hazard 8 ftFrequently Asked Questions
What is the hazard classification of Mountain Brook Reservoir Dam?
Mountain Brook Reservoir Dam 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 Mountain Brook Reservoir Dam?
Mountain Brook Reservoir Dam is owned by TOWN OF JAFFREY (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mountain Brook Reservoir Dam built?
Mountain Brook Reservoir Dam was completed in 1951, making it 75 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 Mountain Brook Reservoir Dam?
Mountain Brook Reservoir Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mountain Brook Reservoir Dam?
Mountain Brook Reservoir Dam has a dam height of 18 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 Mountain Brook Reservoir Dam last inspected?
Mountain Brook Reservoir Dam was last inspected on September 2, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.