Franklin Lake Dam Reservoir Report

Last Updated: December 8, 2025

Franklin Lake Dam, located in Eatontown, New Jersey, serves as a critical structure for the Branch Turtle Mill Brook.


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Summary

Owned by the local government, the dam primarily serves a recreational purpose, providing a surface area of 15 acres and a storage capacity of 70 acre-feet. With a height of 10 feet and a length of 300 feet, the dam is classified as an Earth type structure with a low hazard potential.

Despite its importance for recreation and water management, Franklin Lake Dam is in poor condition as of the last inspection in 2008. The dam is regulated by the New Jersey Department of Environmental Protection, with state permitting, inspection, and enforcement in place. However, there are no records of recent modifications or improvements to address the dam's deteriorating condition.

Given its critical role in the region's water resource management and recreational activities, it is essential for stakeholders to prioritize the rehabilitation and maintenance of Franklin Lake Dam. With its current poor condition and outdated inspection records, there is a pressing need for investment and attention to ensure the safety and functionality of this important infrastructure in Eatontown, New Jersey.

Dam Length

300

Dam Height

10

River Or Stream

Branch Turtle Mill Brook

Primary Dam Type

Earth

Surface Area

15

Drainage Area

0.85

Nid Storage

70

Hazard Potential

Low

Nid Height

10
       
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.