Deer Lake Dam Reservoir Report

Last Updated: December 6, 2025

Deer Lake Dam, located in Broome, New York, along Fly Creek, is a private earth dam primarily used for recreation purposes.


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Summary

With a height of 10 feet and a length of 125 feet, the dam has a storage capacity of 119 acre-feet and covers a surface area of 32 acres. The dam's spillway type is uncontrolled, and it has a low hazard potential with a moderate risk assessment score of 3.

Although the dam was last inspected in 1980 and is currently rated as "Not Rated" in terms of condition assessment, it is regulated by the New York State Department of Environmental Conservation. The dam's emergency action plan status and risk management measures are currently not available, highlighting the need for updated information and potential enhancements to ensure the safety and stability of the structure. For water resource and climate enthusiasts, Deer Lake Dam presents an interesting case study in private dam management and the importance of ongoing monitoring and maintenance to mitigate potential risks and protect surrounding communities and ecosystems.

Dam Length

125

Dam Height

10

River Or Stream

FLY CREEK

Primary Dam Type

Earth

Surface Area

32

Nid Storage

119

Hazard Potential

Low

Nid Height

10
       
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.