Five Mile
Key Takeaway
Five Mile is classified as significant hazard in Connecticut. It was completed in 1855 and is 171 years old. Its primary use is hydroelectric. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 17 ft (taller than 66% in CT) |
| Dam Length | 145 ft |
| Dam Type | Masonry |
| Max Storage | 260 acre-ft |
| Normal Storage | 260 acre-ft |
| Surface Area | 65 acres |
| Drainage Area | 77 sq mi |
| Max Discharge | 3,100 cfs |
| Year Completed | 1855 (171 years old) |
| NID ID | CT00550 |
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
Quinebaug Associates, LLC
Private
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Significant Hazard 14 ftFrequently Asked Questions
What is the hazard classification of Five Mile?
Five Mile 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 Five Mile?
Five Mile is owned by Quinebaug Associates, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Five Mile built?
Five Mile was completed in 1855, making it 171 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 Five Mile?
Five Mile 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 Five Mile?
Five Mile has a dam height of 17 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 Five Mile last inspected?
Five Mile was last inspected on September 12, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.