Cedar Lake Dam
Cedar Lake Dam is an earth dam located in Morris County, New Jersey, built in 1925. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Cedar Lake Dam
The primary purpose of Cedar Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Cedar Lake Property Owners, Inc (private). It impounds the Rockaway River-tr near Denville.
The dam stands 13 feet tall and stretches 250 feet across, creates a reservoir covering 89 acres, has a maximum storage capacity of 600 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1925, the structure is over a century old.
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 04/18/2023.
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Location
| State | New Jersey |
| County | Morris |
| Nearest City | Denville |
| River/Stream | Rockaway River-tr |
| Coordinates | 40.91013, -74.46963 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 250 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 600 acre-ft |
| Max Storage | 600 acre-ft |
| Normal Storage | 492 acre-ft |
| Surface Area | 89 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 37 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Cedar Lake Property Owners, Inc |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/18/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00805 |
| Federal ID | NJ00805 |
| More Info | State Dam Safety Program |