Assunpink #21 Dam Reservoir Report
Nearby: Assunpink #20 Dam Assunpink #8 Dam
Last Updated: December 7, 2025
Assunpink #21 Dam, located in Mercer County, New Jersey, is a crucial structure owned by the local government and regulated by the New Jersey Department of Environmental Protection.
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Summary
The dam, situated on the Assunpink Creek, serves primarily for flood risk reduction, with a height of 24.6 feet and a storage capacity of 80 acre-feet. With a hazard potential rated as high, the dam's condition assessment in May 2021 was deemed satisfactory, reflecting its ongoing maintenance and effectiveness in mitigating flooding risks in the area.
Managed and funded by the Natural Resources Conservation Service, Assunpink #21 Dam plays a vital role in protecting the surrounding community from potential water-related disasters. The dam's association with flood risk reduction underscores its importance in safeguarding the region and its residents from the impact of extreme weather events, especially in a time of increasing climate variability and heightened concerns about water resource management. With regular inspections and a history of satisfactory condition assessments, the dam stands as a critical infrastructure for water resource and climate enthusiasts to monitor and appreciate for its essential role in maintaining the local environment's resilience.
As a significant structure in the region, Assunpink #21 Dam's presence on the Assunpink Creek contributes to the overall water management system in Mercer County. Its strategic location and function in flood risk reduction highlight the intersection of water resource management and climate resilience, emphasizing the importance of sustainable infrastructure development to address the challenges posed by a changing climate. As enthusiasts in this field, understanding the role and significance of dams like Assunpink #21 is crucial for promoting effective water resource management practices and building a more resilient future in the face of climate change impacts.
Dam Length |
2500 |
Dam Height |
24.6 |
River Or Stream |
Assunpink Creek |
Primary Dam Type |
Earth |
Surface Area |
45 |
Drainage Area |
7.9 |
Nid Storage |
80 |
Hazard Potential |
High |
Nid Height |
25 |
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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