Halfway Brook Reservoir Dam Reservoir Report

Last Updated: December 21, 2025

Halfway Brook Reservoir Dam, located in Glens Falls, New York, is a significant earth dam completed in 1936 for water supply purposes.


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Summary

The dam stands at a height of 28 feet and has a length of 410 feet, providing a storage capacity of 289 acre-feet. The reservoir covers a surface area of 31 acres and serves a drainage area of 5.89 square miles.

Managed by the local government and regulated by the New York State Department of Environmental Conservation, Halfway Brook Reservoir Dam poses a significant hazard potential and undergoes inspections every four years. The spillway, with a width of 70 feet, is classified as uncontrolled, capable of discharging a maximum of 3670 cubic feet per second. Despite its age, the dam's condition is not rated, highlighting the need for ongoing monitoring and risk management measures.

Water resource and climate enthusiasts will be intrigued by Halfway Brook Reservoir Dam's role in providing essential water supply services to the region. The dam's historical significance, structural features, and risk assessment information make it a compelling subject for further study and appreciation of the critical infrastructure that supports communities' water needs in the face of changing climate conditions.

Year Completed

1936

Dam Length

410

Dam Height

28

River Or Stream

HALFWAY CREEK

Primary Dam Type

Earth

Surface Area

31

Drainage Area

5.89

Nid Storage

289

Hazard Potential

Significant

Nid Height

28
       
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.