Big Brook Bog Dam
Key Takeaway
Big Brook Bog Dam is classified as significant hazard in New Hampshire. It was completed in 1946 and is 80 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 11 ft (taller than 23.8% in NH) |
| Dam Length | 370 ft |
| Dam Type | Earth |
| Max Storage | 250 acre-ft |
| Normal Storage | 107 acre-ft |
| Surface Area | 36 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 991 cfs |
| Year Completed | 1946 (80 years old) |
| Year Modified | 1971 |
| NID ID | NH00457 |
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
NH FISH AND GAME DEPARTMENT
State Government
Nearby Dams
Coon Brook Bog Dam
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Low Hazard 10 ftMoose Falls Dam
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Significant Hazard 10 ftSecond Connecticut Lake Dam
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Low Hazard 28 ftPerry Pond Dam
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Unknown 7 ftEast Inlet Dam
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Low Hazard 13 ftScott Bog Pond Dam
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Low Hazard 9 ftFirst Connecticut Lake Dam
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High Hazard 56 ftFirst Conn Lake South Bay Dike
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Low Hazard 14 ftFrequently Asked Questions
What is the hazard classification of Big Brook Bog Dam?
Big Brook Bog 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 Big Brook Bog Dam?
Big Brook Bog Dam is owned by NH FISH AND GAME DEPARTMENT (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Big Brook Bog Dam built?
Big Brook Bog Dam was completed in 1946, making it 80 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 Big Brook Bog Dam?
Big Brook Bog 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 Big Brook Bog Dam?
Big Brook Bog Dam has a dam height of 11 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 Big Brook Bog Dam last inspected?
Big Brook Bog Dam was last inspected on September 15, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.