Harriman
Key Takeaway
Harriman is classified as high hazard in Vermont. It was completed in 1924 and is 102 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 | 186 ft (taller than 99.2% in VT) |
| Dam Length | 1,250 ft |
| Dam Type | Other |
| Max Storage | 116.1K acre-ft |
| Normal Storage | 103.4K acre-ft |
| Surface Area | 1,875 acres |
| Drainage Area | 184 sq mi |
| Max Discharge | 35,200 cfs |
| Year Completed | 1924 (102 years old) |
| NID ID | VT00025 |
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
Great River Hydro, LLC
Private
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Significant Hazard 12 ftFrequently Asked Questions
What is the hazard classification of Harriman?
Harriman 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 Harriman?
Harriman is owned by Great River Hydro, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Harriman built?
Harriman was completed in 1924, making it 102 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 Harriman?
Harriman serves the following purposes: Hydroelectric, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Harriman?
Harriman has a dam height of 186 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 Harriman last inspected?
Harriman was last inspected on August 2, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.