Tannery - Dam "A" Reservoir Report
Nearby: West End Dam Carthage State Dam
Last Updated: December 18, 2025
Tannery - Dam "A" is a private hydroelectric dam located on the Black River in Carthage, New York.
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Summary
Built in 1914, this concrete gravity dam stands at 14 feet tall and spans 215 feet in length, with a storage capacity of 68 acre-feet. The dam serves multiple purposes including fish and wildlife pond management, as well as generating hydroelectric power.
Managed by the Federal Energy Regulatory Commission, Tannery - Dam "A" is regulated by various state agencies including the New York State Department of Environmental Conservation. With a significant hazard potential and a moderate risk assessment rating, the dam undergoes regular inspections to ensure its structural integrity and safety. Although the condition assessment is not available, emergency action plans are in place to address any potential risks or incidents.
The dam's uncontrolled spillway, with a width of 117 feet, can handle a maximum discharge of 2800 cubic feet per second. Despite its age, Tannery - Dam "A" continues to play a vital role in water resource management and renewable energy production in the region, highlighting the intersection of water resources and climate sustainability for enthusiasts and stakeholders alike.
Year Completed |
1914 |
Dam Length |
215 |
Dam Height |
14 |
River Or Stream |
Black River |
Primary Dam Type |
Concrete |
Surface Area |
8.5 |
Drainage Area |
1807 |
Nid Storage |
68 |
Hazard Potential |
Significant |
Foundations |
Rock |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Tannery - Dam "A"