Sugar River I
Key Takeaway
Sugar River I is classified as significant hazard in New Hampshire. It was completed in 1928 and is 98 years old. Its primary use is hydroelectric. 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 | 123 ft |
| Dam Type | Concrete |
| Max Storage | 50 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 74 sq mi |
| Max Discharge | 2,300 cfs |
| Year Completed | 1928 (98 years old) |
| NID ID | NH00602 |
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
Private
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Significant Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Sugar River I?
Sugar River I 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 Sugar River I?
Sugar River I is owned by information not available (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Sugar River I built?
Sugar River I was completed in 1928, making it 98 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 Sugar River I?
Sugar River I 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 Sugar River I?
Sugar River I 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 Sugar River I last inspected?
Sugar River I was last inspected on August 26, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.