Newtown Hoffman Site 5a Dam Reservoir Report

Last Updated: December 8, 2025

Newtown Hoffman Site 5a Dam, also known as Jackson Creek Dam, is a critical flood risk reduction structure located in Elmira, New York.


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Summary

Built in 1999 by the USDA NRCS, this Earth-type dam stands at a height of 52 feet and spans 315 feet in length. With a storage capacity of 1469 acre-feet and a drainage area of 1977 acres, it plays a key role in managing water levels and mitigating the risk of flooding in the region.

The dam is regulated by the NYS DEC and undergoes regular inspections to ensure its structural integrity. Despite being classified as having a high hazard potential, the condition assessment in 2019 rated it as satisfactory. In the event of an emergency, plans are in place to manage the risk and protect the surrounding community. With a moderate risk assessment rating, stakeholders are actively involved in implementing measures to enhance the dam's resilience and overall safety.

As part of the Buffalo District, the Newtown Hoffman Site 5a Dam is a crucial piece of infrastructure that exemplifies the collaboration between local government and state agencies in safeguarding water resources and addressing the challenges posed by climate change. Its strategic location along Jackson Creek highlights the importance of proactive measures in managing water flow and protecting the environment and local communities from the impacts of extreme weather events.

Year Completed

1999

Dam Length

315

Dam Height

52

River Or Stream

JACKSON CREEK

Primary Dam Type

Earth

Surface Area

53.5

Drainage Area

1977

Nid Storage

1469

Hazard Potential

High

Nid Height

52
       
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.