Upper Collinsville
Key Takeaway
Upper Collinsville is classified as significant hazard in Connecticut. It was completed in 1837 and is 189 years old. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 18 ft (taller than 67.8% in CT) |
| Dam Length | 325 ft |
| Dam Type | Stone |
| Max Storage | 350 acre-ft |
| Normal Storage | 350 acre-ft |
| Surface Area | 53 acres |
| Drainage Area | 360 sq mi |
| Max Discharge | 55,000 cfs |
| Year Completed | 1837 (189 years old) |
| NID ID | CT00674 |
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
canton hydro llc
State Government
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Significant Hazard 5 ftFrequently Asked Questions
What is the hazard classification of Upper Collinsville?
Upper Collinsville 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 Upper Collinsville?
Upper Collinsville is owned by canton hydro llc (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Collinsville built?
Upper Collinsville was completed in 1837, making it 189 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
How tall is Upper Collinsville?
Upper Collinsville 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 Upper Collinsville last inspected?
Upper Collinsville was last inspected on October 25, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.