Jacksons Mills Dam
Jacksons Mills Dam is an earth dam located in Ocean County, New Jersey, built in 1925. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Jacksons Mills Dam
The primary purpose of Jacksons Mills Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by County Of Ocean (local government). It impounds the South Branch Metedeconk River.
The dam stands 15 feet tall and stretches 400 feet across, creates a reservoir covering 40 acres, has a storage capacity of 150 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1925, 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 08/22/2024.
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Location
| State | New Jersey |
| County | Ocean |
| River/Stream | South Branch Metedeconk River |
| Coordinates | 40.14750, -74.32520 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 400 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 150 acre-ft |
| Normal Storage | 150 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 9 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | County of Ocean |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/22/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00140 |
| Federal ID | NJ00140 |
| More Info | State Dam Safety Program |