Rocky Gorge Upper
Key Takeaway
Rocky Gorge Upper is classified as low hazard in Maine. It was completed in 1900 and is 126 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 10 ft (taller than 18.4% in ME) |
| Dam Length | 140 ft |
| Dam Type | Concrete |
| Max Storage | 141 acre-ft |
| Normal Storage | 141 acre-ft |
| Surface Area | 43 acres |
| Drainage Area | 86 sq mi |
| Max Discharge | 6,600 cfs |
| Year Completed | 1900 (126 years old) |
| NID ID | ME00391 |
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
Rocky Gorge Corporation
Private
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Significant Hazard 70 ftFrequently Asked Questions
What is the hazard classification of Rocky Gorge Upper?
Rocky Gorge Upper 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 Rocky Gorge Upper?
Rocky Gorge Upper is owned by Rocky Gorge Corporation (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Rocky Gorge Upper built?
Rocky Gorge Upper was completed in 1900, making it 126 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 Rocky Gorge Upper?
Rocky Gorge Upper 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 Rocky Gorge Upper?
Rocky Gorge Upper has a dam height of 10 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 Rocky Gorge Upper last inspected?
Rocky Gorge Upper was last inspected on July 30, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.