Johnson Lake Dam is an earth dam located in Sussex County, New Jersey. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 11 ft11 ft tall and 42 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 Johnson Lake Dam
The primary purpose of Johnson Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Township of Byram (local government). It impounds the Lubbers Run-tr.
The dam stands 11 feet tall and stretches 42 feet across, creates a reservoir covering 33 acres, has a storage capacity of 198 acre-feet, and collects water from a drainage area of 0 square miles.
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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 12/21/2022.
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Location
| State | New Jersey |
| County | Sussex |
| River/Stream | Lubbers Run-tr |
| Coordinates | 40.96060, -74.72667 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 42 ft |
Storage & Hydraulics
| NID Storage | 198 acre-ft |
| Normal Storage | 198 acre-ft |
| Surface Area | 33 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 58 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Township of Byram |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/21/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NJ00499 |
| Federal ID | NJ00499 |
| More Info | State Dam Safety Program |