Mcconnellsville Dam Reservoir Report

Last Updated: December 7, 2025

Mcconnellsville Dam, located in Mcconnellsville, New York, was completed in 1914 and stands at a height of 12 feet with a length of 260 feet.


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Summary

The dam, primarily used for recreation, is constructed as a Timber Crib type dam and spans the WEST BRANCH FISH CREEK. With a normal storage capacity of 128 acre-feet and a surface area of 32 acres, the dam offers a picturesque site for water resource and climate enthusiasts to explore and enjoy.

Managed by a private entity and regulated by the NYS DEC, Mcconnellsville Dam has a low hazard potential and a moderate risk assessment rating. Though the condition of the dam is currently not rated, it has been inspected as recently as August 2003. The dam features an uncontrolled spillway with a width of 176 feet, serving as a safety measure in case of excessive water flow. While the dam's emergency action plan status and risk management measures are not specified, the dam remains a popular recreational spot within the Oneida County area, offering visitors a unique opportunity to appreciate the intersection of water resources and climate dynamics in a serene setting.

Year Completed

1914

Dam Length

260

Dam Height

12

River Or Stream

WEST BRANCH FISH CREEK

Primary Dam Type

Timber Crib

Surface Area

32

Drainage Area

150

Nid Storage

260

Hazard Potential

Low

Nid Height

12
       
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.