New Brooklyn Dam Reservoir Report

Last Updated: December 5, 2025

New Brooklyn Dam, located in Folsom, New Jersey, stands as a vital structure along the Great Egg Harbor River, serving primarily for recreational purposes.


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Summary

Built in 1936, this earth dam holds a height of 9 feet and a length of 212 feet, with a storage capacity of 128 acre-feet and a surface area of 74 acres. Despite its historical significance, the dam's condition assessment in 2020 revealed a poor state, indicating a significant hazard potential.

Managed by the local government and regulated by the New Jersey Department of Environmental Protection, the New Brooklyn Dam requires frequent inspections due to its condition. The dam's emergency action plan was last revised in January 2021, with an inspection frequency of every 2 years. With a spillway type unspecified, the dam poses a risk that necessitates effective risk management measures to ensure the safety of the surrounding community and environment. As water resource and climate enthusiasts, it is crucial to monitor and advocate for the maintenance and improvements of this essential infrastructure to prevent potential disasters and preserve the ecological balance of the area.

Year Completed

1936

Dam Length

212

Dam Height

9

River Or Stream

Great Egg Harbor River

Primary Dam Type

Earth

Surface Area

74

Drainage Area

8.8

Nid Storage

128

Hazard Potential

Significant

Nid Height

9
       
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.