Nanticoke Creek Site 7b Dam Reservoir Report

Last Updated: December 5, 2025

Nestled in Tioga County, New York, the Nanticoke Creek Site 7b Dam stands as a crucial structure for flood risk reduction along the KETCHUMVILLE BR NANTICOKE CR.


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Summary

Built in 1970 by the USDA NRCS, this earth-type dam stretches 830 feet in length and reaches a height of 44 feet, offering a storage capacity of 1007 acre-feet. Despite its importance, recent assessments have deemed its condition as poor, with a high hazard potential. The NYS DEC oversees its regulation, inspection, and enforcement to ensure public safety.

The dam's spillway, with a width of 180 feet, remains uncontrolled, posing potential risks in case of heavy inflows. The surrounding community of Maine, New York, relies on the dam for protection against flooding, highlighting the critical role it plays in safeguarding lives and property. With a drainage area of 3.6 square miles and a maximum discharge capacity of 7558 cubic feet per second, the dam's functionality is essential in managing water flow during periods of high precipitation.

As climate change continues to impact weather patterns, the maintenance and upkeep of Nanticoke Creek Site 7b Dam become increasingly vital. With a moderate risk rating and a history of poor condition, proactive measures must be taken to enhance its resilience and ensure its effectiveness in mitigating flood-related risks. Collaboration between local government, regulatory agencies, and the community will be key in preserving this essential water resource infrastructure for future generations.

Year Completed

1970

Dam Length

830

Dam Height

44

River Or Stream

KETCHUMVILLE BR NANTICOKE CR

Primary Dam Type

Earth

Surface Area

4

Drainage Area

3.6

Nid Storage

1007

Hazard Potential

High

Nid Height

44
       
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.