Van Dorans Mill Dam
Van Dorans Mill Dam is an earth dam located in Morris County, New Jersey, built in 1943. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Van Dorans Mill Dam
The primary purpose of Van Dorans Mill Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Thompson M. Swayne (private). It impounds the Passaic River near Millington.
The dam stands 18 feet tall and stretches 940 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 20 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1943, 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 03/08/2024.
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Location
| State | New Jersey |
| County | Morris |
| Nearest City | Millington |
| River/Stream | Passaic River |
| Coordinates | 40.73322, -74.54272 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 940 ft |
| Year Completed | 1943 (83 years old) |
Storage & Hydraulics
| NID Storage | 20 acre-ft |
| Max Storage | 20 acre-ft |
| Normal Storage | 12 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 2,840 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Thompson M. Swayne |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/08/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00364 |
| Federal ID | NJ00364 |
| More Info | State Dam Safety Program |