J. Seward Johnson Dam

Low HazardPoor ConditionEmergency Action Plan: Yes

Location

StateNew Jersey
CountyHunterdon
Nearest CityOldwick
River/StreamCold Brook
Coordinates40.68798, -74.75342

Physical Characteristics

Dam TypeEarth
NID Height24 ft
Dam Height24 ft
Dam Length1,150 ft
Year Completed1967 (59 years old)

Storage & Hydraulics

NID Storage50 acre-ft
Normal Storage50 acre-ft
Surface Area6 acres
Drainage Area0 sq mi
Max Discharge450 cfs

Ownership & Safety

PurposeIrrigation
OwnerJames Loring Johnson
Owner TypePrivate
Hazard ClassificationLow
Condition AssessmentPoor
Last Inspection03/11/2021
Emergency Action PlanYes

Identifiers

NID IDNJ00770
Federal IDNJ00770
More InfoState Dam Safety Program

Nearby Dams

Lake Cushetunk Dam 4.8 mi Significant Round Valley North Dam 5.7 mi High Hunterdon Learning Center Dam 5.9 mi Low Round Valley Dike 6.1 mi High Ellsworth (detention Pond) Dam 6.3 mi Significant Ravine Lake Dam 6.3 mi High Round Valley P&f Dike 6.4 mi Low Chester Pond Dam 6.6 mi Low Peapack-gladstone Res Dam 6.8 mi Low Lake Solitude Dam 7.1 mi High