Turn Mill Pond Dam Reservoir Report

Last Updated: December 8, 2025

Turn Mill Pond Dam in Jackson Township, New Jersey, is a state-regulated structure with a primary purpose of recreation.


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Summary

Owned by the state, this Earth-type dam stands at a height of 12.8 feet and has a storage capacity of 115 acre-feet. The dam, located on the South Run-TR river, spans 2200 feet and covers a surface area of 58 acres, serving as a popular spot for outdoor activities in Ocean County.

Despite being classified as having a low hazard potential, Turn Mill Pond Dam is regularly inspected by the NJDEP to ensure its structural integrity and overall condition. The most recent assessment in July 2021 deemed the dam to be in fair condition. With a last inspection date in July 2021 and an inspection frequency of 4 years, the dam is monitored to meet safety standards and emergency preparedness guidelines. Managed and funded by the Natural Resources Conservation Service, Turn Mill Pond Dam continues to provide recreational opportunities while maintaining a focus on safety and environmental conservation.

Dam Length

2200

Dam Height

12.8

River Or Stream

South Run-TR

Primary Dam Type

Earth

Surface Area

58

Drainage Area

3

Nid Storage

115

Hazard Potential

Low

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.