Green Swamp #1 Dam

High HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

StateNew Jersey
CountyPassaic
River/StreamPost Brook
Coordinates41.04130, -74.32320

Physical Characteristics

Dam TypeEarth
NID Height29 ft
Dam Height29 ft
Dam Length640 ft
Year Completed1926 (100 years old)

Storage & Hydraulics

NID Storage41,700 acre-ft
Normal Storage41,700 acre-ft
Surface Area2,400 acres
Drainage Area94 sq mi

Ownership & Safety

PurposeWater Supply
OwnerNorth Jersey District Water Supply Commission
Owner TypeState
Hazard ClassificationHigh
Condition AssessmentSatisfactory
Last Inspection10/16/2024
Emergency Action PlanYes

Identifiers

NID IDNJ00209
Federal IDNJ00213S001
More InfoState Dam Safety Program

Nearby Dams

Green Swamp #2 Dam 0.2 mi High Green Swamp #3 Dam 0.4 mi High Green Swamp #4 Dam 0.6 mi High Irish Brook Dam 0.8 mi High Core Wall Dam 1.1 mi High Wolf Den Dam 1.1 mi High Post Brook Dam 1.1 mi High Glen Wild Lake Dam 1.3 mi Significant Overflow Weir Dam 1.3 mi High Morse Lake Dam 1.4 mi Low