Lake Jefferson

Sullivan County, New York (near Jeffersonville)

River/Stream: East Branch Callicoon Creek

High Hazard

Failure would likely cause loss of life

Key Facts

Dam Type
Gravity
Height
22 ft
Dam Length
220 ft
Reservoir Storage
350 acre-ft
Year Completed
1927
Primary Purpose
Hydroelectric
Owner Type
Private
Max Discharge
6,865 cfs

Condition Assessment

UnsatisfactoryLast inspected: 2025-06-05

Hazard Classification: High — This describes the potential consequences of dam failure, not the likelihood of failure.

Condition Assessment: Unsatisfactory — This describes the current physical condition of the dam based on the most recent inspection.

Location

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Quick Stats

NID ID
NY00205
State
New York (NY)
Coordinates
41.77740, -74.92530
Age
99 years

Nearby Dams

External Resources

Data sourced from the National Inventory of Dams (NID). Information may not reflect the most current status of this dam. Hazard classification reflects potential consequences of failure, not the likelihood of failure or the current condition.