Tennents Brook Dam
Tennents Brook Dam is an earth dam located in Middlesex County, New Jersey, built in 1890. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Tennents Brook Dam
The primary purpose of Tennents Brook Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Utility Service Affiliates (perth Amboy) Inc. (private). It impounds the Tennents Brook near Old Bridge.
The dam stands 9 feet tall and stretches 600 feet across, creates a reservoir covering 50 acres, has a maximum storage capacity of 340 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1890, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 03/27/2024.
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Location
| State | New Jersey |
| County | Middlesex |
| Nearest City | Old Bridge |
| River/Stream | Tennents Brook |
| Coordinates | 40.42580, -74.33898 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 600 ft |
| Year Completed | 1890 (136 years old) |
Storage & Hydraulics
| NID Storage | 340 acre-ft |
| Max Storage | 340 acre-ft |
| Normal Storage | 250 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 267 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Utility Service Affiliates (Perth Amboy) Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/27/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NJ00380 |
| Federal ID | NJ00380 |
| More Info | State Dam Safety Program |