Manor Lake Dam
Manor Lake Dam is an earth dam located in Morris County, New Jersey. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Manor Lake Dam
Manor Lake Dam is a dam in Morris, New Jersey. The dam is owned by Township Of Parsippany-troy Hills (local government). It impounds the Whippany River.
The dam stands 5 feet tall and stretches 125 feet across, creates a reservoir covering 4 acres, has a storage capacity of 9 acre-feet, and collects water from a drainage area of 1 square miles.
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 11/14/2024.
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Location
| State | New Jersey |
| County | Morris |
| River/Stream | Whippany River |
| Coordinates | 40.88180, -74.42833 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 5 ft |
| Dam Height | 5 ft |
| Dam Length | 125 ft |
Storage & Hydraulics
| NID Storage | 9 acre-ft |
| Normal Storage | 9 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 375 cfs |
Ownership & Safety
| Owner | Township of Parsippany-Troy Hills |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/14/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ01026 |
| Federal ID | NJ01026 |
| More Info | State Dam Safety Program |