Hollow Dam
Key Takeaway
Hollow Dam is classified as significant hazard in New York. It was completed in 1987 and is 39 years old. Its primary use is hydroelectric. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 31 ft (taller than 80.7% in NY) |
| Dam Length | 386 ft |
| Dam Type | Concrete |
| Max Storage | 220 acre-ft |
| Normal Storage | 220 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 294 sq mi |
| Max Discharge | 10,000 cfs |
| Year Completed | 1987 (39 years old) |
| NID ID | NY01604 |
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
Ampersand Hollow Dam Hydro, LLC
Private
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What is the hazard classification of Hollow Dam?
Hollow Dam 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 Hollow Dam?
Hollow Dam is owned by Ampersand Hollow Dam Hydro, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hollow Dam built?
Hollow Dam was completed in 1987, making it 39 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 Hollow Dam?
Hollow Dam 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 Hollow Dam?
Hollow Dam has a dam height of 31 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 Hollow Dam last inspected?
Hollow Dam was last inspected on September 23, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.