Allens Falls Reservoir Report
Nearby: Parishville Sugar Island
Last Updated: December 17, 2025
Allens Falls is a captivating hydroelectric dam located in West Stockholm, New York, along the West Branch St.
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Summary
Regis River. Built in 1991, this concrete gravity dam stands at 37 feet tall and spans 766 feet in length, with a storage capacity of 1780 acre-feet. The dam serves as a vital source of renewable energy, utilizing a spillway width of 556 feet to manage a maximum discharge of 29,205 cubic feet per second.
Managed by the Federal Energy Regulatory Commission, Allens Falls poses a high hazard potential and is inspected annually to ensure operational safety. Despite its high-risk designation, the dam's condition assessment remains unavailable, highlighting the need for ongoing risk management measures. This dam not only provides hydroelectric power but also contributes to flood control and water resource management in the region, making it a crucial infrastructure project for both energy and climate enthusiasts alike.
With its unique design and critical role in the local ecosystem, Allens Falls serves as a prime example of sustainable energy production and water resource management. As climate change continues to impact water availability and infrastructure resilience, the importance of dams like Allens Falls in providing clean energy and water regulation cannot be overstated. As enthusiasts of water resources and climate conservation, understanding and advocating for the safe and efficient operation of dams like Allens Falls is essential in promoting a sustainable future for generations to come.
Year Completed |
1991 |
Dam Length |
766 |
Dam Height |
37 |
River Or Stream |
West Branch St. Regis River |
Primary Dam Type |
Concrete |
Surface Area |
132 |
Drainage Area |
200 |
Nid Storage |
1780 |
Outlet Gates |
Other Controlled - 2, Slide (sluice gate) - 1 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
37 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Allens Falls