Milton Lake Dam is a concrete dam located in Union County, New Jersey, built in 1937. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 204 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Milton Lake Dam
The primary purpose of Milton Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by County of Union (local government). It impounds the Robins Branch Rahway River near Rahway.
The dam stands 10 feet tall and stretches 204 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 30 acre-feet, and collects water from a drainage area of 21 square miles. Completed in 1937, the structure is well-established, with more than 75 years of service.
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 02/15/2024.
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Location
| State | New Jersey |
| County | Union |
| Nearest City | Rahway |
| River/Stream | Robins Branch Rahway River |
| Coordinates | 40.60627, -74.29868 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 204 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 30 acre-ft |
| Max Storage | 30 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 21 sq mi |
| Max Discharge | 2,168 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | County of Union |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 02/15/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00599 |
| Federal ID | NJ00599 |
| More Info | State Dam Safety Program |