Tannery - Dam "A"

Black River· Jefferson, New York· Built 1914· Concrete· 14 ft tall
Significant Hazard Hydroelectric Fish And Wildlife Pond Not Listed

Key Takeaway

Tannery - Dam "A" is classified as significant hazard in New York. It was completed in 1914 and is 112 years old. Its primary use is hydroelectric. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 14 ft (taller than 33.5% in NY)
Dam Length215 ft
Dam TypeConcrete
Max Storage68 acre-ft
Normal Storage68 acre-ft
Surface Area9 acres
Drainage Area1,807 sq mi
Max Discharge2,800 cfs
Year Completed1914 (112 years old)
NID IDNY00298

Safety Information

Significant Hazard

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?

Emergency Action Plan: Yes
Last Inspection: June 17, 2022
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

Not Listed

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Tannery - Dam "A"?

Tannery - Dam "A" 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 Tannery - Dam "A"?

Tannery - Dam "A" is owned by information not available (Not Listed). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Tannery - Dam "A" built?

Tannery - Dam "A" 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 Tannery - Dam "A"?

Tannery - Dam "A" serves the following purposes: Hydroelectric, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Tannery - Dam "A"?

Tannery - Dam "A" 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 Tannery - Dam "A" last inspected?

Tannery - Dam "A" was last inspected on June 17, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.