Osborns Mills Dam
Osborns Mills Dam is an earth dam located in Monmouth County, New Jersey. It carries a Significant hazard potential classification and has a poor condition assessment.
About Osborns Mills Dam
The primary purpose of Osborns Mills 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 Wall (local government). It impounds the Wreck Pond Brook near Spring Lake.
The dam stands 12 feet tall and stretches 450 feet across, creates a reservoir covering 25 acres, has a storage capacity of 108 acre-feet, and collects water from a drainage area of 8 square miles.
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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 11/26/2024.
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Location
| State | New Jersey |
| County | Monmouth |
| Nearest City | Spring Lake |
| River/Stream | Wreck Pond Brook |
| Coordinates | 40.15315, -74.06168 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 450 ft |
Storage & Hydraulics
| NID Storage | 108 acre-ft |
| Normal Storage | 108 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 100 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Township of Wall |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 11/26/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00087 |
| Federal ID | NJ00087 |
| More Info | State Dam Safety Program |