Northumberland Dam Reservoir Report
Nearby: Clarks Mills Lower Clark Mills Upper
Last Updated: December 16, 2025
Northumberland Dam, located in Schuylerville, New York, is a state-owned concrete dam built in 1870 on the Hudson River with a primary purpose of navigation.
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Summary
Standing at a height of 16 feet and stretching 805 feet in length, the dam has a storage capacity of 3,350 acre-feet and covers a surface area of 2,750 acres. The dam is regulated by the New York State Department of Environmental Conservation (NYS DEC) and is equipped with an uncontrolled spillway that is 725 feet wide. Despite a low hazard potential, the dam's condition has not been rated, and it has not been inspected since May 2011.
The Northumberland Dam plays a crucial role in managing the water resources and navigation along the Hudson River. With its historical significance dating back to the 19th century, the dam continues to serve its purpose effectively. Although the dam's risk assessment is moderate, with a risk level of 3 out of 5, there have been no reported incidents or emergencies associated with the dam. As an essential structure in the region, efforts to maintain and monitor the dam's condition are imperative to ensure its continued safe operation and protection of the surrounding environment.
Enthusiasts of water resources and climate in Northumberland Dam's vicinity can appreciate the engineering marvel and historical relevance of this structure. As a state-regulated dam with a focus on navigation, the Northumberland Dam stands as a testament to the importance of effective water management in sustaining regional ecosystems and supporting transportation infrastructure. Continued vigilance and attention to the dam's maintenance and inspection protocols will be crucial in safeguarding its integrity and ensuring its long-term functionality for the benefit of the community and the environment.
Year Completed |
1870 |
Dam Length |
805 |
Dam Height |
16 |
River Or Stream |
HUDSON RIVER |
Primary Dam Type |
Concrete |
Surface Area |
2750 |
Drainage Area |
2997 |
Nid Storage |
3350 |
Hazard Potential |
Low |
Nid Height |
16 |
Seasonal Comparison
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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.
Northumberland Dam
Schuyler Island Way Schuylerville