Upper Kezar Falls - Approach Channel Reservoir Report

Last Updated: December 14, 2025

The Upper Kezar Falls Approach Channel is a hydroelectric structure located in Kezar Falls, Maine, on the Ossipee River.


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Summary

Built in 1910, this concrete gravity dam stands at a height of 11 feet and has a length of 196 feet. It has a storage capacity of 130 acre-feet and a maximum discharge of 3360 cubic feet per second. The dam is primarily used for hydroelectric purposes, with two slide (sluice gate) outlet gates.

Managed by the Federal Energy Regulatory Commission, the Upper Kezar Falls Approach Channel has a low hazard potential and a moderate risk assessment rating. Its spillway type is uncontrolled, with a width of 176 feet. The dam has not undergone any significant modifications in recent years, with the last inspection conducted in June 2018. While the condition assessment is currently not available, emergency action plans are in place, meeting guidelines set by regulatory agencies.

Overall, the Upper Kezar Falls Approach Channel serves as an important hydroelectric infrastructure in the region, contributing to the generation of clean energy. As water resource and climate enthusiasts, it is crucial to monitor and ensure the safety and efficiency of such structures to mitigate any potential risks to the environment and surrounding communities. By staying informed and involved in the regulation and maintenance of these facilities, we can support sustainable water resource management and resilient infrastructure development for a greener future.

Year Completed

1910

Dam Length

196

Dam Height

11

River Or Stream

Ossipee River

Primary Dam Type

Concrete

Surface Area

10

Drainage Area

416

Nid Storage

130

Outlet Gates

Slide (sluice gate) - 2

Hazard Potential

Low

Nid Height

11
       
Seasonal Comparison

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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.