Long Pond Dam Reservoir Report
Nearby: Second Pond Dam Mill Pond Dam
Last Updated: January 11, 2026
Long Pond Dam, located in Grafton, New York, is a state-regulated earth dam completed in 1918 for recreational purposes.
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Summary
With a height of 9 feet and a length of 200 feet, the dam creates a reservoir with a storage capacity of 1702 acre-feet and a surface area of 115 acres. The dam is situated on the TR-QUACKEN KILL river/stream and has a high hazard potential due to its proximity to populated areas.
Despite its high hazard potential, Long Pond Dam has been assessed as being in satisfactory condition as of February 2018. The dam is inspected every 2 years, with the last inspection conducted in January 2020. While the dam does not have a spillway, it has a maximum discharge capacity of 33 cubic feet per second. The risk assessment for the dam is considered high, indicating the importance of ongoing monitoring and maintenance to ensure its safety and functionality for both water resource management and recreational use.
Year Completed |
1918 |
Dam Length |
200 |
Dam Height |
9 |
River Or Stream |
TR-QUACKEN KILL |
Primary Dam Type |
Earth |
Surface Area |
115 |
Drainage Area |
2.13 |
Nid Storage |
1702 |
Hazard Potential |
High |
Nid Height |
9 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Hudson River At Lock 1 Near Waterford Ny
|
4430cfs |
Hudson R Above Lock 1 Nr Waterford Ny
|
7110cfs |
Hoosic River Near Eagle Bridge Ny
|
1080cfs |
Hudson River At Green Island Ny
|
10400cfs |
Mohawk River At Cohoes Ny
|
8960cfs |
Walloomsac River Near North Bennington
|
208cfs |
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.
Long Pond Dam