Mill Dam
Mill Dam is an earth dam located in Burlington County, New Jersey, built in 1908. It carries a Low hazard potential classification and has a poor condition assessment.
About Mill Dam
The primary purpose of Mill 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 Mount Holly (local government). It impounds the North Branch Rancocas Creek near Mount Holly.
The dam stands 15 feet tall and stretches 240 feet across, creates a reservoir covering 37 acres, has a storage capacity of 102 acre-feet, and collects water from a drainage area of 144 square miles. Completed in 1908, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 04/09/2024.
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Location
| State | New Jersey |
| County | Burlington |
| Nearest City | Mount Holly |
| River/Stream | North Branch Rancocas Creek |
| Coordinates | 39.99283, -74.78117 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 240 ft |
| Year Completed | 1908 (118 years old) |
Storage & Hydraulics
| NID Storage | 102 acre-ft |
| Normal Storage | 102 acre-ft |
| Surface Area | 37 acres |
| Drainage Area | 144 sq mi |
| Max Discharge | 78 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Township of Mount Holly |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 04/09/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NJ00540 |
| Federal ID | NJ00540 |
| More Info | State Dam Safety Program |