Nanticoke Creek Site 9c Dam Reservoir Report

Last Updated: December 6, 2025

Nanticoke Creek Site 9c Dam, located in Nanticoke, New York, is a crucial structure designed by the USDA NRCS to reduce flood risks along the Nanticoke Creek.


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Summary

Completed in 1967, this earth dam stands at a height of 33 feet and spans 870 feet in length. With a storage capacity of 899 acre-feet, the dam plays a pivotal role in safeguarding the surrounding area from potential flooding events.

Managed by the NYS DEC, the dam is regulated, permitted, inspected, and enforced by state authorities to ensure its structural integrity and compliance with safety standards. The dam's spillway, with a width of 218 feet, is designed as uncontrolled, allowing for the safe release of excess water during periods of heavy rainfall. Despite being assessed as in fair condition as of November 2019, the dam carries a high hazard potential, necessitating regular monitoring and maintenance to mitigate risks.

With a moderate risk rating and a history of periodic inspections, Nanticoke Creek Site 9c Dam remains a vital piece of infrastructure for flood risk reduction in the region. Its strategic location, sturdy construction, and effective management underscore its importance in protecting the community and preserving the integrity of the Nanticoke Creek watershed. For water resource and climate enthusiasts, this dam serves as a fascinating example of engineering ingenuity and environmental stewardship in mitigating the impacts of extreme weather events.

Year Completed

1967

Dam Length

870

Dam Height

33

River Or Stream

NANTICOKE CREEK

Primary Dam Type

Earth

Surface Area

13

Drainage Area

4.36

Nid Storage

899

Hazard Potential

High

Nid Height

33
       
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.