Upper Greenwich
Key Takeaway
Upper Greenwich is classified as low hazard in New York. It was completed in 1918 and is 108 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 14 ft (taller than 33.5% in NY) |
| Dam Length | 200 ft |
| Dam Type | Concrete |
| Max Storage | 90 acre-ft |
| Normal Storage | 90 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 399 sq mi |
| Max Discharge | 14,200 cfs |
| Year Completed | 1918 (108 years old) |
| NID ID | NY01434 |
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
Batten Kill Hydro Associates
Private
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Low Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Upper Greenwich?
Upper Greenwich 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 Upper Greenwich?
Upper Greenwich is owned by Batten Kill Hydro Associates (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Greenwich built?
Upper Greenwich was completed in 1918, making it 108 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 Upper Greenwich?
Upper Greenwich 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 Upper Greenwich?
Upper Greenwich has a dam height of 14 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 Greenwich last inspected?
Upper Greenwich was last inspected on August 18, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.