Conewango Creek Site 19 Dam Reservoir Report

Last Updated: December 7, 2025

Conewango Creek Site 19 Dam, located in Randolph, New York, is a key structure for flood risk reduction along Battle Creek.


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Summary

Built in 1971 by USDA NRCS, this earth dam stands at 65 feet high and spans 480 feet in length, providing a storage capacity of 391 acre-feet and a drainage area of 2.1 square miles. With a maximum discharge of 1899 cfs and a spillway width of 212 feet, the dam is designed to manage high hazard potential and has been assessed as satisfactory in condition.

Managed by the NYS DEC, the dam undergoes regular inspections every two years to ensure its structural integrity and effectiveness in reducing flood risks. The dam's emergency action plan is up to date, meeting guidelines for risk management. Despite moderate risk assessment, the dam has been deemed as satisfactory in its current condition, showcasing its importance in protecting the surrounding community from potential flooding events.Overall, Conewango Creek Site 19 Dam plays a crucial role in water resource management and climate resilience efforts in Cattaraugus County, New York.

Year Completed

1971

Dam Length

480

Dam Height

65

River Or Stream

BATTLE CREEK

Primary Dam Type

Earth

Surface Area

10

Drainage Area

2.1

Nid Storage

391

Hazard Potential

High

Nid Height

65
       
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.