Fillmore Glen Dam Reservoir Report

Last Updated: December 6, 2025

Fillmore Glen Dam, located in Moravia, New York, is a concrete dam completed in 1931 primarily for recreational purposes.


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Summary

The dam stands at a height of 27 feet and spans 104 feet in length, creating Fillmore Glen Lake with a storage capacity of 45 acre-feet. Situated on the TR-OWASCO INLET river, the dam serves as a picturesque backdrop for outdoor enthusiasts seeking a tranquil escape in Cayuga County. Despite its age, the dam has a low hazard potential and has not been rated for its current condition.

Owned and regulated by the State of New York through the NYS DEC, Fillmore Glen Dam has undergone state inspection, permitting, and enforcement processes to ensure its safety and compliance with regulatory standards. With a spillway width of 12 feet, the dam has a maximum storage capacity of 45 acre-feet and a normal storage capacity of 27 acre-feet, making it an important feature of the local landscape. The dam's risk assessment is classified as high, indicating the need for ongoing risk management measures to mitigate potential hazards.

In addition to its structural significance, Fillmore Glen Dam is associated with a state-regulated recreation area, offering visitors opportunities for hiking, picnicking, and other outdoor activities in a scenic natural setting. The dam's historical and environmental importance, coupled with its recreational value, make it a vital part of the region's water resource infrastructure and a popular destination for climate enthusiasts and nature lovers alike.

Year Completed

1931

Dam Length

104

Dam Height

27

River Or Stream

TR-OWASCO INLET

Primary Dam Type

Concrete

Surface Area

3

Nid Storage

45

Hazard Potential

Low

Nid Height

27
       
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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.