George Lake Dam Reservoir Report

Last Updated: December 7, 2025

George Lake Dam, located in Long Valley, New Jersey, is a recreational dam built in 1909 with a primary purpose of providing leisure activities for water resource and climate enthusiasts.


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Summary

This earth dam stands at a height of 29.5 feet and has a length of 230 feet, creating a reservoir with a storage capacity of 88 acre-feet. The dam is situated on Electric Brook, within the Morris County area, offering a serene environment for outdoor activities such as fishing, boating, and wildlife observation.

Despite its historical significance and recreational value, George Lake Dam has been flagged with a significant hazard potential and a poor condition assessment in recent inspections. The dam is state-regulated by the New Jersey Department of Environmental Protection (NJDEP) and undergoes regular inspections and enforcement measures to ensure public safety. The last inspection date was recorded in October 2020, with a frequency of every two years, highlighting the importance of ongoing monitoring and maintenance to mitigate potential risks.

Local government ownership and management of George Lake Dam underscore the need for continued collaboration with state regulatory agencies to address the dam's condition and implement necessary risk management measures. With a congressional representative, Tom Malinowski, overseeing the area, there is a shared commitment to safeguarding the dam and its surrounding environment for future generations of water enthusiasts. As efforts are made to improve the dam's condition and safety features, George Lake remains a valued recreational destination for residents and visitors alike.

Year Completed

1909

Dam Length

230

Dam Height

29.5

River Or Stream

Electric Brook

Primary Dam Type

Earth

Surface Area

5

Drainage Area

2.9

Nid Storage

88

Hazard Potential

Significant

Nid Height

30
       
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.