Lake Aeroflex Dam Reservoir Report

Last Updated: December 10, 2025

Lake Aeroflex Dam, located in Andover Township, Sussex County, New Jersey, is a state-owned structure regulating the flow of the Pequest River-TR.


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Summary

The dam, primarily designed for recreation, is an earth-type construction standing at 15 feet high and spanning 50 feet in length. With a storage capacity of 360 acre-feet and a surface area of 125 acres, the dam serves as a popular spot for outdoor activities and water-based recreation in the region.

Despite its low hazard potential, the dam's condition assessment in 2005 rated it as poor, highlighting the need for regular inspections and potential maintenance. The dam is regulated by the New Jersey Department of Environmental Protection (NJDEP) and is subject to state jurisdiction, permitting, inspection, and enforcement. While the structure has not been modified in recent years, its risk management measures, emergency action plans, and inundation maps are not currently up to date, raising concerns about its long-term safety and stability.

Lake Aeroflex Dam, nestled in the picturesque landscape of Sussex County, plays a crucial role in water resource management and recreational opportunities in the area. As climate change continues to impact water resources, ensuring the safety and resilience of structures like Lake Aeroflex Dam is paramount to mitigate potential risks and protect both the environment and the surrounding communities.

Dam Length

50

Dam Height

15

River Or Stream

Pequest River-TR

Primary Dam Type

Earth

Surface Area

125

Drainage Area

4.4

Nid Storage

360

Hazard Potential

Low

Nid Height

15
       
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.
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Area Campgrounds