Westons Arch Dam
Westons Arch Dam is a concrete dam located in Middlesex County, New Jersey, built in 1919. It carries a Significant hazard potential classification and has a fair condition assessment.
About Westons Arch Dam
The primary purpose of Westons Arch Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by New Brunswick City (local government). It impounds the Lawrence Brook near New Brunswick.
The dam stands 17 feet tall and stretches 248 feet across, creates a reservoir covering 160 acres, has a maximum storage capacity of 1,600 acre-feet, and collects water from a drainage area of 42 square miles. Completed in 1919, 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 12/15/2023.
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Location
| State | New Jersey |
| County | Middlesex |
| Nearest City | New Brunswick |
| River/Stream | Lawrence Brook |
| Coordinates | 40.48142, -74.41347 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 248 ft |
| Year Completed | 1919 (107 years old) |
Storage & Hydraulics
| NID Storage | 1,600 acre-ft |
| Max Storage | 1,600 acre-ft |
| Normal Storage | 1,050 acre-ft |
| Surface Area | 160 acres |
| Drainage Area | 42 sq mi |
| Max Discharge | 2,290 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | New Brunswick City |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 12/15/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00382 |
| Federal ID | NJ00382 |
| More Info | State Dam Safety Program |