Swans Falls Reservoir Report

Last Updated: December 16, 2025

Swans Falls, located in Fryeburg, Maine, is a captivating hydroelectric dam on the Saco River that was completed in 1923.


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Summary

With a dam height of 10 feet and a length of 630 feet, Swans Falls has a normal storage capacity of 450 acre-feet and a maximum storage of 535 acre-feet. This concrete dam also serves recreational purposes, offering a surface area of 150 acres for outdoor activities.

Managed by the Federal Energy Regulatory Commission, Swans Falls has a low hazard potential and a moderate risk assessment. The dam features an uncontrolled spillway with a width of 475 feet and two slide gates for water release. Despite not being state-regulated or inspected, the dam's risk management measures are in place to ensure safety and efficient operations. Its strategic location in the New England District adds to its importance as a key hydroelectric facility in the region.

For water resource and climate enthusiasts, Swans Falls presents a unique opportunity to explore the intersection of renewable energy generation and environmental conservation. Its historical significance and modern operational standards make it an intriguing case study for sustainable water resource management. With its serene surroundings and crucial role in power generation, Swans Falls stands as a symbol of responsible hydroelectric infrastructure in the heart of Maine's natural landscape.

Year Completed

1923

Dam Length

630

Dam Height

10

River Or Stream

Saco River

Primary Dam Type

Concrete

Surface Area

150

Drainage Area

446

Nid Storage

535

Outlet Gates

Slide (sluice gate) - 2

Hazard Potential

Low

Nid Height

10
       
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.