Clinton Mills Dike Reservoir Report
Last Updated: December 15, 2025
Clinton Mills Dike, located in Hunterdon, New Jersey, is a private earth dam constructed on the South Branch Raritan River with the primary purpose of flood risk reduction.
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Summary
Standing at a height of 7.8 feet and stretching 320 feet in length, this dike plays a crucial role in managing water levels and protecting surrounding areas from potential flooding events. The dam has a storage capacity of 21 acre-feet and covers a surface area of 10 acres, serving as a vital structure in the region's water resource management.
Managed by the New Jersey Department of Environmental Protection (NJDEP), Clinton Mills Dike is subject to state regulatory oversight, including permitting, inspection, and enforcement activities. Despite its significant hazard potential, the dam's condition assessment in April 2021 deemed it satisfactory, ensuring its continued functionality and safety. With a history of inspections and a designated emergency action plan (EAP), the dam is well-prepared to address any potential risks or emergencies, demonstrating a commitment to effective risk management and public safety in the face of changing climate conditions.
Representing a critical infrastructure project for flood control in the region, Clinton Mills Dike stands as a testament to the importance of proactive water resource management in addressing climate-related challenges. With its strategic location on the South Branch Raritan River and its role in mitigating flood risks, this dam serves as a vital component of the community's resilience against natural disasters. Through ongoing monitoring, maintenance, and emergency preparedness efforts, Clinton Mills Dike exemplifies a model for sustainable water infrastructure management in the face of a changing climate landscape.
Dam Length |
320 |
Dam Height |
7.8 |
River Or Stream |
South Branch Raritan River |
Primary Dam Type |
Earth |
Surface Area |
10 |
Drainage Area |
111 |
Nid Storage |
21 |
Hazard Potential |
Significant |
Nid Height |
8 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Spruce Run Recreation Area
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Voorhees State Park
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Dogwood Haven Family Campground
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Tinicum County Park
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Clinton Mills Dike