Union Mill Lake Dam Reservoir Report
Last Updated: December 13, 2025
Union Mill Lake Dam, located in Evesham Township, New Jersey, is a private-owned structure primarily used for recreation purposes.
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Summary
The dam, classified as an Earth type, stands at a height of 12.5 feet and has a storage capacity of 73 acre-feet, providing a serene surface area of 4 acres for visitors to enjoy. Despite its recreational appeal, the dam poses a significant hazard potential with a poor condition assessment, highlighting the need for regular inspections and maintenance.
Managed by the New Jersey Department of Environmental Protection, Union Mill Lake Dam falls under state jurisdiction with regulatory agencies overseeing permitting, inspection, and enforcement activities. The dam's last inspection in March 2021 revealed its poor condition, prompting the need for ongoing risk assessment and management measures to ensure public safety. Additionally, the dam lacks an Emergency Action Plan (EAP) and inundation maps, indicating a need for enhanced emergency preparedness protocols.
With its picturesque location along Barton Run-TR, Union Mill Lake Dam serves as a popular recreational spot in Burlington County, New Jersey. As climate change impacts water resources and infrastructure resilience, the dam's significance in both recreational and safety aspects underscores the importance of proactive maintenance and risk mitigation efforts. As water resource and climate enthusiasts, understanding the complexities of managing structures like Union Mill Lake Dam is crucial for fostering sustainable practices and safeguarding our natural environment for future generations.
Dam Length |
150 |
Dam Height |
12.5 |
River Or Stream |
Barton Run-TR |
Primary Dam Type |
Earth |
Surface Area |
4 |
Nid Storage |
73 |
Hazard Potential |
Significant |
Nid Height |
13 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Union Mill Lake Dam