Amwell No. 3 Dam
Amwell No. 3 Dam is an earth dam located in Hunterdon County, New Jersey, built in 1970. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Amwell No. 3 Dam
The primary purpose of Amwell No. 3 Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Amwell Valley Conservancy (private). It impounds the Branch Alexauken Creek.
The dam stands 26 feet tall and stretches 330 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 122 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1970, 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 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 09/27/2024.
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Location
| State | New Jersey |
| County | Hunterdon |
| River/Stream | Branch Alexauken Creek |
| Coordinates | 40.41275, -74.90070 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 330 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 122 acre-ft |
| Max Storage | 122 acre-ft |
| Normal Storage | 62 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 600 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Amwell Valley Conservancy |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/27/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00621 |
| Federal ID | NJ00621 |
| More Info | State Dam Safety Program |