Allentown Dam Reservoir Report

Last Updated: December 7, 2025

Located in Allentown Borough, New Jersey, the Allentown Dam stands as a crucial water resource structure along Doctors Creek.


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Summary

Managed by the local government, this Earth dam serves primarily for recreational purposes, offering a storage capacity of 341 acre-feet and covering a surface area of 26 acres. With a height of 18 feet and a length of 300 feet, the dam plays a significant role in regulating water flow and providing opportunities for leisure activities in the area.

Despite its satisfactory condition assessment and high hazard potential, the Allentown Dam undergoes regular inspections to ensure its structural integrity and safety. The last inspection took place in October 2021, with a mandated inspection frequency of every two years. Additionally, the dam is under state jurisdiction and regulation by the New Jersey Department of Environmental Protection, with enforcement and permitting processes in place to maintain compliance with safety standards and emergency preparedness protocols.

In the event of an emergency, the Allentown Dam has protocols in place to address potential risks and ensure the safety of surrounding communities. With detailed emergency action plans and regular risk assessments, the dam is equipped to handle various scenarios and mitigate potential hazards effectively. As a vital component of the local water infrastructure, the Allentown Dam demonstrates a commitment to water resource management and climate resilience in the region.

Dam Length

300

Dam Height

18

River Or Stream

Doctors Creek

Primary Dam Type

Earth

Surface Area

26

Drainage Area

17.4

Nid Storage

341

Hazard Potential

High

Nid Height

18
       
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.