Oneida City Reservoir Dam Reservoir Report

Last Updated: December 7, 2025

The Oneida City Reservoir Dam, also known as Glenmore Reservoir, is a concrete dam located in Glenmore, New York.


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Summary

Built in 1926, this dam serves as a crucial water supply source, with a normal storage capacity of 615 acre-feet and a maximum storage of 1420 acre-feet. The dam is situated on the Florence Creek, within a drainage area of 14.4 square miles.

With a height of 50 feet and a length of 378 feet, the Oneida City Reservoir Dam poses a high hazard potential and has been assessed as being in poor condition as of June 2017. Despite its age, the dam is still actively regulated, inspected, and permitted by the New York State Department of Environmental Conservation. However, the dam lacks a spillway, which is a critical safety feature in managing water levels during emergencies.

Given its important role in water supply and the high risk associated with its condition, ongoing risk management measures and inspections are essential to ensure the safety and reliability of the Oneida City Reservoir Dam. Climate and water resource enthusiasts can appreciate the significance of this dam in sustaining the region's water needs while recognizing the need for ongoing maintenance and improvements to mitigate potential hazards and ensure long-term resilience.

Year Completed

1926

Dam Length

378

Dam Height

50

River Or Stream

FLORENCE CREEK

Primary Dam Type

Concrete

Surface Area

88

Drainage Area

14.4

Nid Storage

1420

Hazard Potential

High

Nid Height

50
       
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.