Fox Hollow Lake Dam Reservoir Report

Last Updated: December 10, 2025

Fox Hollow Lake Dam, located in Sussex, New Jersey, stands as a significant structure along the Paulinskill River-TR.


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Summary

Built in 1925, this private-owned earth dam serves primarily for recreational purposes, offering a serene setting for outdoor enthusiasts. With a dam height of 12 feet and a length of 300 feet, the reservoir has a storage capacity of 480 acre-feet, providing ample water for various activities such as fishing, boating, and swimming.

Despite its age, Fox Hollow Lake Dam has undergone regular inspections by the New Jersey Department of Environmental Protection, with the last assessment conducted in March 2021. The dam currently holds a satisfactory condition assessment, indicating its structural integrity and functionality. With a significant hazard potential, the dam's emergency action plan is crucial in ensuring the safety of surrounding communities in the event of a breach or overflow.

As a vital component of the local water resource infrastructure, Fox Hollow Lake Dam plays a crucial role in managing water levels and providing recreational opportunities for residents and visitors alike. With its picturesque location in Sparta Township and close proximity to the Paulinskill River, the dam serves as a valuable asset for the community while also posing potential risks that require vigilant monitoring and maintenance to ensure continued safety and functionality.

Year Completed

1925

Dam Length

300

Dam Height

12

River Or Stream

Paulinskill River-TR

Primary Dam Type

Earth

Surface Area

76

Drainage Area

1.4

Nid Storage

480

Hazard Potential

Significant

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.
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Area Campgrounds