Port Jervis Reservoir #3 Dike Reservoir Report

Last Updated: December 6, 2025

Port Jervis Reservoir #3 Dike, located in Port Jervis, New York, is a vital structure owned by the local government and regulated by the NYS DEC for water supply purposes.


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Summary

Built in 1912, this earth dam stands at a height of 12 feet and spans 970 feet in length, providing a maximum storage capacity of 1570 acre-feet. The reservoir covers a surface area of 71 acres and is situated along the TR-DELAWARE RIVER, making it a crucial component of the region's water resource infrastructure.

Despite its fair condition assessment and high hazard potential, the dam has undergone regular inspections, with the latest conducted in December 2020. The emergency action plan (EAP) has been prepared and updated to ensure public safety in case of any unforeseen events. With a risk assessment rating of High (2), the dam is subject to heightened monitoring and risk management measures to mitigate potential hazards. The dam is not under the jurisdiction of the US Army Corps of Engineers, and its operation and maintenance fall under the purview of the local government.

In light of its historical significance and critical role in water supply management, Port Jervis Reservoir #3 Dike stands as a testament to the engineering prowess of its time. As climate change continues to impact water resources, ensuring the safety and integrity of such structures becomes paramount. With ongoing inspections, risk assessments, and emergency preparedness measures in place, the dam serves as a crucial lifeline for the community, highlighting the importance of sustainable water resource management in the face of evolving environmental challenges.

Year Completed

1912

Dam Length

970

Dam Height

12

River Or Stream

TR-DELAWARE RIVER

Primary Dam Type

Earth

Surface Area

71

Nid Storage

1570

Hazard Potential

High

Nid Height

12
       
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.