Tennanah Lake Dam
Key Takeaway
Tennanah Lake Dam is classified as significant hazard in New York. It was completed in 1914 and is 112 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 17 ft (taller than 46.3% in NY) |
| Dam Length | 41 ft |
| Dam Type | Concrete |
| Max Discharge | 60 cfs |
| Year Completed | 1914 (112 years old) |
| NID ID | NY00339 |
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
BLUE MOUNTAIN ASSOCIATES;BLUE MOUNTAIN ASSOCIATES
Private
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Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Tennanah Lake Dam?
Tennanah Lake 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 Tennanah Lake Dam?
Tennanah Lake Dam is owned by BLUE MOUNTAIN ASSOCIATES;BLUE MOUNTAIN ASSOCIATES (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Tennanah Lake Dam built?
Tennanah Lake Dam was completed in 1914, making it 112 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 Tennanah Lake Dam?
Tennanah Lake Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Tennanah Lake Dam?
Tennanah Lake Dam 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 Tennanah Lake Dam last inspected?
Tennanah Lake Dam was last inspected on June 28, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.