Third Reservoir Spillway and Dam

Rockland County, New York (near Thiells)

River/Stream: TR-HORSE CHOCK BROOK

Significant Hazard

Failure could cause economic loss or disruption

Key Facts

Dam Type
Earth
Height
25 ft
Dam Length
510 ft
Reservoir Storage
373 acre-ft
Year Completed
1946
Primary Purpose
Water Supply
Owner Type
State
Max Discharge
—

Condition Assessment

PoorLast inspected: 2019-06-25

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

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

Location

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Quick Stats

NID ID
NY01430
State
New York (NY)
Coordinates
41.20750, -74.08056
Age
80 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.