Lower Lisbon
Key Takeaway
Lower Lisbon is classified as low hazard in New Hampshire. It was completed in 1986 and is 40 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 18 ft (taller than 63.5% in NH) |
| Dam Length | 292 ft |
| Dam Type | Concrete |
| Max Storage | 96 acre-ft |
| Normal Storage | 96 acre-ft |
| Surface Area | 64 acres |
| Drainage Area | 288 sq mi |
| Max Discharge | 1,200 cfs |
| Year Completed | 1986 (40 years old) |
| NID ID | NH00144 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
White Mountain Hydroelectric Corporation
Private
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High Hazard 149 ftFrequently Asked Questions
What is the hazard classification of Lower Lisbon?
Lower Lisbon is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lower Lisbon?
Lower Lisbon is owned by White Mountain Hydroelectric Corporation (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lower Lisbon built?
Lower Lisbon was completed in 1986, making it 40 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 Lower Lisbon?
Lower Lisbon 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 Lower Lisbon?
Lower Lisbon 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 Lower Lisbon last inspected?
Lower Lisbon was last inspected on May 22, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.