Cozy Lake Dam is an earth dam located in Morris County, New Jersey, built in 1924. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 8 ft8 ft tall and 610 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 Cozy Lake Dam
The primary purpose of Cozy Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Cozy Lakers Inc. (private). It impounds the East Branch of Rockaway River near Jefferson.
The dam stands 8 feet tall and stretches 610 feet across, creates a reservoir covering 29 acres, has a storage capacity of 150 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1924, the structure is over a century old.
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 06/07/2022.
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Location
| State | New Jersey |
| County | Morris |
| Nearest City | Jefferson |
| River/Stream | East Branch of Rockaway River |
| Coordinates | 41.01602, -74.50468 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 610 ft |
| Year Completed | 1924 (102 years old) |
Storage & Hydraulics
| NID Storage | 150 acre-ft |
| Normal Storage | 150 acre-ft |
| Surface Area | 29 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 955 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Cozy Lakers Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/07/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NJ00309 |
| Federal ID | NJ00309 |
| More Info | State Dam Safety Program |