Flagstaff
Key Takeaway
Flagstaff is classified as high hazard in Maine. It was completed in 1948 and is 78 years old. Its primary use is hydroelectric. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 45 ft (taller than 94.7% in ME) |
| Dam Length | 1,339 ft |
| Dam Type | Earth |
| Max Storage | 275.5K acre-ft |
| Normal Storage | 275.5K acre-ft |
| Surface Area | 17,950 acres |
| Drainage Area | 516 sq mi |
| Max Discharge | 20,000 cfs |
| Year Completed | 1948 (78 years old) |
| NID ID | ME00127 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Brookfield Renewable Power LLC NYRO
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Flagstaff?
Flagstaff is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Flagstaff?
Flagstaff is owned by Brookfield Renewable Power LLC NYRO (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Flagstaff built?
Flagstaff was completed in 1948, making it 78 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 Flagstaff?
Flagstaff serves the following purposes: Hydroelectric, Recreation, Water Supply, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Flagstaff?
Flagstaff has a dam height of 45 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 Flagstaff last inspected?
Flagstaff was last inspected on June 21, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.