Union Falls Reservoir Report

Last Updated: December 20, 2025

Union Falls is a captivating hydroelectric dam located on the Saranac River in Clayburg, New York.


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Summary

Built in 1905, this concrete gravity dam stands at a height of 24 feet and spans 520 feet, providing a storage capacity of 8,900 acre-feet. With a maximum discharge of 13,000 cubic feet per second, Union Falls plays a crucial role in harnessing the power of water for electricity generation in the region.

Managed by the Federal Energy Regulatory Commission, Union Falls has a high hazard potential and is classified as a very high risk structure. Despite its age, the dam remains a vital component of the local water resource infrastructure, with a controlled spillway and two slide gates for water release. The dam's location in Clinton County contributes to its importance in regulating water flow and ensuring a stable water supply for the surrounding area.

As an enthusiast of water resources and climate, Union Falls offers a fascinating glimpse into the intersection of human engineering and natural forces. Its historical significance, structural design, and operational characteristics make it a noteworthy example of how we have harnessed water resources for sustainable energy production. The dam's presence on the Saranac River underscores the essential role it plays in both water management and renewable energy generation, making it a compelling subject for further exploration and study in the field.

Year Completed

1905

Dam Length

520

Dam Height

24

River Or Stream

Saranac River

Primary Dam Type

Concrete

Surface Area

1630

Drainage Area

329

Nid Storage

8900

Outlet Gates

Slide (sluice gate) - 2

Hazard Potential

High

Foundations

Rock

Nid Height

24
       
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.
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Area Campgrounds