Union Mill Lake Dam
Union Mill Lake Dam is an earth dam located in Burlington County, New Jersey. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Union Mill Lake Dam
The primary purpose of Union Mill Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Umlcc (private). It impounds the Barton Run-tr.
The dam stands 13 feet tall and stretches 150 feet across, creates a reservoir covering 4 acres, and has a maximum storage capacity of 73 acre-feet.
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 03/25/2025.
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Location
| State | New Jersey |
| County | Burlington |
| River/Stream | Barton Run-tr |
| Coordinates | 39.85282, -74.91023 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 150 ft |
Storage & Hydraulics
| NID Storage | 73 acre-ft |
| Max Storage | 73 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 4 acres |
| Max Discharge | 79 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | UMLCC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/25/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00971 |
| Federal ID | NJ00971 |
| More Info | State Dam Safety Program |