Mount Laurel Lake Dam is an earth dam located in Passaic County, New Jersey, built in 1930. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 345 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Mount Laurel Lake Dam
The primary purpose of Mount Laurel Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Upper Greenwood Lake Property Owners (private). It impounds the Longhouse Brook near Upper Greenwood Lake.
The dam stands 15 feet tall and stretches 345 feet across, creates a reservoir covering 40 acres, has a maximum storage capacity of 210 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1930, the structure is well-established, with more than 75 years of service.
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. The most recent inspection on record was 03/29/2002. That was over 24 years ago.
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Location
| State | New Jersey |
| County | Passaic |
| Nearest City | Upper Greenwood Lake |
| River/Stream | Longhouse Brook |
| Coordinates | 41.16578, -74.38877 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 345 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 210 acre-ft |
| Max Storage | 210 acre-ft |
| Normal Storage | 153 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 300 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Upper Greenwood Lake Property Owners |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 03/29/2002 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NJ00506 |
| Federal ID | NJ00506 |
| More Info | State Dam Safety Program |