Willow Grove Dam
Willow Grove Dam is an earth dam located in Salem County, New Jersey. It carries a Significant hazard potential classification and has a fair condition assessment.
About Willow Grove Dam
Willow Grove Dam is a dam in Salem, New Jersey. The dam is owned by The Nature Conservancy (private). It impounds the Maurice River.
The dam stands 10 feet tall and stretches 1,500 feet across, creates a reservoir covering 125 acres, has a storage capacity of 512 acre-feet, and collects water from a drainage area of 64 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 09/06/2023.
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Location
| State | New Jersey |
| County | Salem |
| River/Stream | Maurice River |
| Coordinates | 39.55037, -75.07268 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 1,500 ft |
Storage & Hydraulics
| NID Storage | 512 acre-ft |
| Normal Storage | 512 acre-ft |
| Surface Area | 125 acres |
| Drainage Area | 64 sq mi |
| Max Discharge | 2,160 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | The Nature Conservancy |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 09/06/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00040 |
| Federal ID | NJ00040 |
| More Info | State Dam Safety Program |