Assunpink # 6 Dam Reservoir Report
Last Updated: December 7, 2025
Assunpink # 6 Dam, located in Robbinsville Township, Mercer County, New Jersey, is a vital structure designed for flood risk reduction along the Assunpink Creek.
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Summary
Built in 1975, this earth dam stands at a height of 31 feet and spans a length of 2500 feet, providing a storage capacity of 12,653 acre-feet to mitigate potential flooding in the area. The primary purpose of the dam is flood risk reduction, while also serving as a habitat for fish and wildlife with a surface area of 66 acres.
Managed by the state regulatory agency NJDEP, Assunpink # 6 Dam undergoes regular inspections with a satisfactory condition assessment as of June 2021. With a high hazard potential, the dam's emergency action plan (EAP) was last revised in June 2018, ensuring preparedness for any unforeseen events. The dam's location in a densely populated area underscores the importance of its role in protecting both human and natural habitats from the impacts of flooding, making it a crucial asset for water resource and climate enthusiasts in the region.
Overall, Assunpink # 6 Dam stands as a significant infrastructure project funded and managed by the Natural Resources Conservation Service, showcasing the collaborative efforts between federal and state agencies to safeguard communities and ecosystems from the adverse effects of extreme weather events. Its strategic placement along the Assunpink Creek and efficient operation underscore its critical role in enhancing resilience to climate-related challenges, making it a focal point for water resource and climate enthusiasts seeking to understand the intersection of infrastructure, environmental conservation, and climate adaptation in the region.
Year Completed |
1975 |
Dam Length |
2500 |
Dam Height |
31 |
River Or Stream |
Assunpink Creek |
Primary Dam Type |
Earth |
Surface Area |
66 |
Drainage Area |
22 |
Nid Storage |
12653 |
Hazard Potential |
High |
Nid Height |
31 |
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.
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