Blackwood Lake Dam
Blackwood Lake Dam is an earth dam located in Camden County, New Jersey, built in 1922. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Blackwood Lake Dam
The primary purpose of Blackwood Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Township Of Gloucester (local government). It impounds the South Branch Big Timber Creek near Blackwood.
The dam stands 14 feet tall and stretches 200 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 236 acre-feet, and collects water from a drainage area of 19 square miles. Completed in 1922, the structure is over a century old.
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 04/17/2025.
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Location
| State | New Jersey |
| County | Camden |
| Nearest City | Blackwood |
| River/Stream | South Branch Big Timber Creek |
| Coordinates | 39.80190, -75.07340 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 200 ft |
| Year Completed | 1922 (104 years old) |
Storage & Hydraulics
| NID Storage | 236 acre-ft |
| Max Storage | 236 acre-ft |
| Normal Storage | 23 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 19 sq mi |
| Max Discharge | 1,927 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Township of Gloucester |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/17/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00800 |
| Federal ID | NJ00800 |
| More Info | State Dam Safety Program |