Wildwood Dike Reservoir Report

Last Updated: December 10, 2025

The Wildwood Dike in Parsippany, New Jersey, is a crucial piece of infrastructure designed for water supply purposes.


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Summary

This earth dam, standing at a height of 8 feet and stretching 170 feet in length, plays a vital role in managing water resources in the area. Situated on the banks of the Troy Brook, this dam serves to store water, with a maximum capacity of 180 acre-feet and a normal storage of 120 acre-feet.

Owned and regulated by the local government and the New Jersey Department of Environmental Protection, the Wildwood Dike has a low hazard potential and is in satisfactory condition as of the last inspection in 2008. With a drainage area of 1.2 square miles and a surface area of 16 acres, this dam is a key component in the water management system of Morris County. Its location in Mountain Lakes Borough highlights its importance in safeguarding the water supply for the surrounding communities.

While the Wildwood Dike may not be the largest dam in the region, its role in ensuring water security for Parsippany and beyond cannot be understated. With proper maintenance and oversight from state agencies, this earth dam continues to serve its primary purpose effectively. Climate and water resource enthusiasts will appreciate the importance of structures like the Wildwood Dike in maintaining water supply reliability and resilience in the face of changing environmental conditions.

Dam Length

170

Dam Height

8

River Or Stream

Troy Brook

Primary Dam Type

Earth

Surface Area

16

Drainage Area

1.2

Nid Storage

180

Hazard Potential

Low

Nid Height

8
       
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.