Treadwell Mills
Key Takeaway
Treadwell Mills is classified as significant hazard in New York. It was completed in 1938 and is 88 years old. Its primary use is hydroelectric. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 24 ft (taller than 68.1% in NY) |
| Dam Length | 278 ft |
| Dam Type | Gravity |
| Max Storage | 820 acre-ft |
| Normal Storage | 820 acre-ft |
| Surface Area | 95 acres |
| Drainage Area | 604 sq mi |
| Max Discharge | 1,200 cfs |
| Year Completed | 1938 (88 years old) |
| NID ID | NY00017 |
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
Lower Saranac Hydro Partners, LLC
Private
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Low Hazard 8 ftFrequently Asked Questions
What is the hazard classification of Treadwell Mills?
Treadwell Mills 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 Treadwell Mills?
Treadwell Mills is owned by Lower Saranac Hydro Partners, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Treadwell Mills built?
Treadwell Mills was completed in 1938, making it 88 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 Treadwell Mills?
Treadwell Mills 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 Treadwell Mills?
Treadwell Mills has a dam height of 24 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 Treadwell Mills last inspected?
Treadwell Mills was last inspected on May 18, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.