Beaver Lake Dam Reservoir Report
Last Updated: December 6, 2025
Beaver Lake Dam, located in Sullivan, New York, was completed in 1940 with a primary purpose of flood risk reduction.
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Summary
This earth dam stands at 7 feet high and stretches 24 feet in length, with a maximum storage capacity of 53 acre-feet. The dam's controlled spillway, with a width of 4 feet, helps manage a maximum discharge of 34 cubic feet per second, contributing to its low hazard potential rating.
Owned privately, Beaver Lake Dam is regulated by the New York State Department of Environmental Conservation, with state-permitting, inspection, and enforcement in place. The dam also serves recreational purposes, offering a surface area of 19 acres for enthusiasts to enjoy. While the dam's condition is not rated, its risk assessment is deemed very high, reflecting the importance of ongoing risk management measures to safeguard the surrounding area from potential hazards.
For water resource and climate enthusiasts, Beaver Lake Dam presents an intriguing case study in dam infrastructure maintenance and risk management. With its historical significance dating back to the mid-20th century, the dam continues to play a crucial role in flood risk reduction while providing recreational opportunities for the local community. As discussions around climate change and water resource management intensify, the importance of monitoring and maintaining dams like Beaver Lake Dam to ensure their safety and effectiveness in the face of evolving environmental challenges becomes increasingly clear.
Year Completed |
1940 |
Dam Length |
24 |
Dam Height |
7 |
River Or Stream |
TR-BOWERS POND |
Primary Dam Type |
Earth |
Surface Area |
19 |
Nid Storage |
53 |
Hazard Potential |
Low |
Nid Height |
7 |
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.
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