Lake Delaware Dam Reservoir Report

Last Updated: December 6, 2025

Lake Delaware Dam, located in the picturesque town of Lake Delaware, New York, is a private-owned recreational dam that was completed in 1840.


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Summary

This earth dam stands at a height of 9 feet and spans 67 feet in length, with a storage capacity of 265 acre-feet. The dam serves as a popular spot for outdoor enthusiasts, offering activities such as fishing, boating, and picnicking in its 64-acre surface area.

Managed by the New York State Department of Environmental Conservation (NYS DEC), Lake Delaware Dam is classified as low hazard potential with a moderate risk assessment rating. While the dam is not currently rated for its condition, it undergoes regular state inspections and is equipped with uncontrolled spillways. The surrounding area, including the TR-Little Delaware River, benefits from the dam's presence, providing a haven for wildlife and contributing to the local ecosystem.

With its historical significance and recreational offerings, Lake Delaware Dam is a vital water resource in Delaware County, New York. As climate change impacts water availability and quality, the maintenance and regulation of dams like Lake Delaware Dam play a crucial role in ensuring sustainable water management and preserving natural habitats. Enthusiasts can visit this tranquil setting to appreciate the beauty of the dam and its surrounding environment while supporting its continued conservation efforts.

Year Completed

1840

Dam Length

67

Dam Height

9

River Or Stream

TR-LITTLE DELAWARE RIVER

Primary Dam Type

Earth

Surface Area

64

Nid Storage

265

Hazard Potential

Low

Nid Height

9
       
Seasonal Comparison

Weather Forecast

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.