Rock Ridge Lake Dam

Significant HazardPoor ConditionEmergency Action Plan: Yes

Location

StateNew Jersey
CountyMorris
Nearest CityDenville
River/StreamDenney Brook
Coordinates40.91135, -74.46343

Physical Characteristics

Dam TypeEarth
NID Height10 ft
Dam Height10 ft
Dam Length235 ft
Year Completed1949 (77 years old)

Storage & Hydraulics

NID Storage174 acre-ft
Normal Storage174 acre-ft
Surface Area17 acres
Drainage Area0 sq mi
Max Discharge330 cfs

Ownership & Safety

PurposeRecreation
OwnerRock Ridge Community Club
Owner TypePrivate
Hazard ClassificationSignificant
Condition AssessmentPoor
Last Inspection04/15/2025
Emergency Action PlanYes

Identifiers

NID IDNJ00178
Federal IDNJ00178
More InfoState Dam Safety Program

Nearby Dams

Cooks Pond Dam 0.2 mi Significant Cedar Lake Dam 0.3 mi Significant Birchwood Lake Dam 1.3 mi High Lake Arrowhead Dam 1.5 mi Significant Crystal Lake Dam 1.6 mi High Sunset Lake Dam 1.7 mi High Indian Lake Dam 1.8 mi Low Wildwood Dike 1.9 mi Low Dixons Pond Dam 1.9 mi Low Wildwood Lake Dam 2.0 mi High