Wildwood Lake Dam Reservoir Report

Last Updated: December 10, 2025

Wildwood Lake Dam, located in Parsippany, New Jersey, serves as a vital structure for recreational purposes in the area.


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Summary

Managed by the local government, this earth dam spans 745 feet in length and stands at a height of 13 feet, with a storage capacity of 180 acre-feet. The dam sits on Troy Brook and is regulated by the New Jersey Department of Environmental Protection, ensuring its compliance with state inspection and enforcement protocols.

With a hazard potential classified as high, Wildwood Lake Dam has been assessed as satisfactory in condition, following its last inspection in December 2020. The dam's Emergency Action Plan (EAP) status is currently unspecified, but it is crucial for ensuring the safety of nearby residents. In the event of an emergency, having a prepared and up-to-date EAP is essential for effective risk management and mitigation strategies.

As a significant element in the local water resource infrastructure, Wildwood Lake Dam plays a crucial role in flood control and water management. Its location in Mountain Lakes Borough adds to its importance in the region, highlighting the need for continued monitoring and maintenance to ensure its effectiveness in safeguarding the community and the environment.

Dam Length

745

Dam Height

13

River Or Stream

Troy Brook

Primary Dam Type

Earth

Surface Area

16

Drainage Area

1.2

Nid Storage

180

Hazard Potential

High

Nid Height

13
       
Seasonal Comparison

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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.