Decozen's Dam
Decozen's Dam is an earth dam located in Morris County, New Jersey, built in 1954. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Decozen's Dam
The primary purpose of Decozen's Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Ferring Pharmaceuticals, Inc. (private). It impounds the Troy Brook near Parsippany.
The dam stands 11 feet tall and stretches 250 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 48 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1954, the structure is well into its service life at over 50 years 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 03/08/2023.
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Location
| State | New Jersey |
| County | Morris |
| Nearest City | Parsippany |
| River/Stream | Troy Brook |
| Coordinates | 40.87133, -74.44063 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 250 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 48 acre-ft |
| Max Storage | 48 acre-ft |
| Normal Storage | 38 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 48 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Ferring Pharmaceuticals, Inc. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/08/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00353 |
| Federal ID | NJ00353 |
| More Info | State Dam Safety Program |