Edgewood Lake Lower Dam Reservoir Report

Last Updated: December 6, 2025

Edgewood Lake Lower Dam, located in Beaverkill, Sullivan County, New York, is a stone dam completed in 1945 primarily for recreation purposes.


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Summary

With a height of 15 feet and a length of 60 feet, the dam stores 156 acre-feet of water in Edgewood Lake. The dam has a controlled spillway that is 4 feet wide and can handle a maximum discharge of 30 cubic feet per second. The dam's condition was last assessed as satisfactory in December 2016, with a significant hazard potential due to its location and storage capacity.

The dam is regulated by the New York State Department of Environmental Conservation (NYS DEC) and undergoes regular inspections, with the last one conducted in December 2020. The risk assessment for Edgewood Lake Lower Dam is classified as very high, indicating the need for stringent risk management measures. Despite its age, the dam has been maintained in satisfactory condition, but ongoing monitoring and maintenance are essential to ensure its continued safety and functionality. Enthusiasts of water resources and climate will find Edgewood Lake Lower Dam an intriguing structure given its historical significance and recreational value in the region.

Year Completed

1945

Dam Length

60

Dam Height

15

River Or Stream

TR-BEAVER KILL

Primary Dam Type

Stone

Surface Area

21

Drainage Area

0.46

Nid Storage

156

Hazard Potential

Significant

Nid Height

15
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.