Hanover Lake Dam is an earth dam located in Burlington County, New Jersey, built in 1948. It carries a Significant hazard potential classification.
Dam profile
NID height · 9 ft9 ft tall and 400 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Hanover Lake Dam
The primary purpose of Hanover Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Usaf Amc (federal). It impounds the Hartshorne Mill Stream near Browns Mills.
The dam stands 9 feet tall and stretches 400 feet across, creates a reservoir covering 75 acres, has a maximum storage capacity of 847 acre-feet, and collects water from a drainage area of 17 square miles. Completed in 1948, the structure is well-established, with more than 75 years of service.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 07/30/2024.
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Location
| State | New Jersey |
| County | Burlington |
| Nearest City | Browns Mills |
| River/Stream | Hartshorne Mill Stream |
| Coordinates | 39.98333, -74.51806 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 400 ft |
| Year Completed | 1948 (78 years old) |
Storage & Hydraulics
| NID Storage | 847 acre-ft |
| Max Storage | 847 acre-ft |
| Normal Storage | 142 acre-ft |
| Surface Area | 75 acres |
| Drainage Area | 17 sq mi |
| Max Discharge | 840 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Usaf Amc |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 07/30/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00459 |
| Federal ID | NJ00459 |
| More Info | State Dam Safety Program |