Stony Brook W.s. Site 11 (amwell) Dam
Stony Brook W.s. Site 11 (amwell) Dam is an earth dam located in Hunterdon County, New Jersey, built in 1963. It carries a Significant hazard potential classification and has a poor condition assessment.
About Stony Brook W.s. Site 11 (amwell) Dam
The primary purpose of Stony Brook W.s. Site 11 (amwell) Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Division Of Fish & Wildlife (state). It impounds the Stony Brook-tr.
The dam stands 22 feet tall and stretches 951 feet across, creates a reservoir covering 10 acres, has a storage capacity of 41 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1963, the structure is well into its service life at over 50 years 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 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 10/02/2024.
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Location
| State | New Jersey |
| County | Hunterdon |
| River/Stream | Stony Brook-tr |
| Coordinates | 40.39945, -74.84125 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 951 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 41 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Division of Fish & Wildlife |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 10/02/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00343 |
| Federal ID | NJ00343 |
| More Info | State Dam Safety Program |