Green Swamp #4 Dam
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | New Jersey |
| County | Passaic |
| River/Stream | Wanaque River |
| Coordinates | 41.04032, -74.31135 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 65 ft |
| Dam Height | 65 ft |
| Dam Length | 300 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 81,730 acre-ft |
| Normal Storage | 81,730 acre-ft |
| Surface Area | 2,310 acres |
| Drainage Area | 90 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | North Jersey District Water Supply Commission |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/16/2024 |
| Emergency Action Plan | Yes |