Lake Hopatcong Dam

High HazardPoor ConditionEmergency Action Plan: Yes

Location

StateNew Jersey
CountyMorris
River/StreamMusconetcong River
Coordinates40.91767, -74.66418

Physical Characteristics

Dam TypeConcrete
NID Height17 ft
Dam Height17 ft
Dam Length271 ft
Year Completed1925 (101 years old)

Storage & Hydraulics

NID Storage48,209 acre-ft
Normal Storage48,209 acre-ft
Surface Area2,474 acres
Drainage Area25 sq mi

Ownership & Safety

PurposeFlood Risk Reduction
OwnerDivision of Parks and Forestry
Owner TypeState
Hazard ClassificationHigh
Condition AssessmentPoor
Last Inspection08/28/2024
Emergency Action PlanYes

Identifiers

NID IDNJ00327
Federal IDNJ00327
More InfoState Dam Safety Program

Nearby Dams

Lake Musconetcong Dam 2.4 mi High Ledgewood Pond Dam 2.5 mi Significant Lake Lackawanna Dam 2.8 mi Significant Bear Pond Dam A 3.3 mi Significant Bear Pond Dam B 3.4 mi Significant Jefferson Lake Dam 3.6 mi Low Bear Pond Dam D 3.6 mi Low Jefferson Lake Dike 3.7 mi Low Johnson Lake Dam 4.4 mi Low Cranberry Lake Dam 4.5 mi High