Long Lake Park Dam Reservoir Report

Last Updated: December 15, 2025

Long Lake Park Dam, also known as Jennings Memorial Pond, is a recreational dam located in Long Lake, New York.


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Summary

Constructed in 1934, this earth dam stands at a height of 13 feet and spans 560 feet in length. It serves the primary purpose of providing recreational opportunities for visitors, with a normal storage capacity of 270 acre-feet and a maximum discharge of 805 cubic feet per second.

Managed by the local government and regulated by the New York State Department of Environmental Conservation, Long Lake Park Dam is classified as having a low hazard potential and a moderate risk assessment. Despite not being rated for its condition, the dam has undergone state inspections, with the last recorded inspection dating back to October 1984. While the dam features an uncontrolled spillway with a width of 50 feet, there are no outlet gates or associated structures to manage water flow.

Water resource and climate enthusiasts visiting Long Lake Park Dam can appreciate its historical significance and the recreational opportunities it provides in the Hamilton County area. With its picturesque surroundings and moderate risk assessment, this earth dam continues to offer a serene setting for outdoor activities and serves as a vital component of the local ecosystem in Long Lake, New York.

Year Completed

1934

Dam Length

560

Dam Height

13

River Or Stream

LONG LAKE OFFSTREAM

Primary Dam Type

Earth

Surface Area

45

Drainage Area

8.28

Nid Storage

485

Hazard Potential

Low

Nid Height

13
       
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.