Ellsworth (detention Pond) Dam
Ellsworth (detention Pond) Dam is an earth dam located in Somerset County, New Jersey. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Ellsworth (detention Pond) Dam
The primary purpose of Ellsworth (detention Pond) Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Hills Village North Master Association (private). It impounds the N. Branch Raratin River-tr.
The dam stands 9 feet tall and stretches 400 feet across, creates a reservoir covering 1 acres, has a storage capacity of 20 acre-feet, and collects water from a drainage area of 0 square miles.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 03/27/2025.
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Location
| State | New Jersey |
| County | Somerset |
| River/Stream | N. Branch Raratin River-tr |
| Coordinates | 40.65712, -74.64097 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 400 ft |
Storage & Hydraulics
| NID Storage | 20 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 2,400 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Hills Village North Master Association |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/27/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00944 |
| Federal ID | NJ00944 |
| More Info | State Dam Safety Program |