Colliersville Reservoir Report

Last Updated: December 6, 2025

Colliersville, also known as Goodyear Lake Dam, is a key structure located in Otsego, New York, along the North Branch Susquehanna River.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1908 by Stevens - Hewitt Engineering Co., this dam serves primarily for hydroelectric purposes, providing power and recreational opportunities in the area. Standing at a height of 35 feet and with a length of 324 feet, it has a storage capacity of 7800 acre-feet and a maximum discharge rate of 11600 cubic feet per second.

Managed by the Federal Energy Regulatory Commission, Colliersville Dam holds a high hazard potential due to its critical role in water resource management. Despite its age, the dam is maintained for safety, with regular inspections conducted by the regulatory agency to ensure its structural integrity. While the risk assessment indicates a moderate level of risk, the dam's condition assessment is currently not available. Emergency action plans are in place, with the last revision in October 2019, ensuring preparedness in case of any unforeseen events.

With its historical significance and vital role in the region's water resource management, Colliersville Dam stands as a testament to early engineering achievements. As a focal point for both hydroelectric power generation and recreational activities, this structure continues to play a crucial role in sustaining the local ecosystem and economy. Despite the challenges posed by its age and hazard potential, ongoing regulatory oversight and risk management measures help ensure the safety and stability of this essential infrastructure for the community.

Year Completed

1908

Dam Length

324

Dam Height

35

River Or Stream

North Branch Susquehanna River

Surface Area

364

Drainage Area

351

Nid Storage

7800

Hazard Potential

High

Foundations

Rock

Nid Height

35
       
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.