Jackson Summit Reservoir Dam Reservoir Report

Last Updated: December 11, 2025

Jackson Summit Reservoir Dam, located in Jackson Summit, New York, is a vital water resource infrastructure managed by the local government.


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Summary

Built in 1934, this earth dam stands at a height of 27 feet and stretches 1400 feet in length, providing storage for up to 1550 acre-feet of water from Jackson Creek. With a primary purpose of water supply, the dam has a high hazard potential but is currently assessed as satisfactory in condition.

Operated by the New York State Department of Environmental Conservation, the dam is regulated and inspected to ensure its structural integrity and safety. The reservoir has a normal storage capacity of 1079 acre-feet and covers a surface area of 90 acres. In case of emergencies, the dam has an uncontrolled spillway with a width of 50 feet to manage excess water flow. Despite its moderate risk assessment, the dam meets guidelines for emergency action plans and continues to serve as a crucial water source for the surrounding area.

Year Completed

1934

Dam Length

1400

Dam Height

27

River Or Stream

JACKSON CREEK

Primary Dam Type

Earth

Surface Area

90

Drainage Area

5

Nid Storage

1550

Hazard Potential

High

Nid Height

27
       
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.