Lake Skannatati Dams A B & C Reservoir Report

Last Updated: December 6, 2025

Lake Skannatati Dams A, B, and C, located in Sloatsburg, New York, are state-owned earth dams completed in 1945 for recreational purposes.


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Summary

These dams, with a combined height of 24 feet and a length of 760 feet, provide a storage capacity of 486 acre-feet of water for activities such as fishing, boating, and swimming on Lake Kanawauke. The dams have a low hazard potential and a moderate risk assessment rating, with a maximum discharge capacity of 1,280 cubic feet per second.

Managed by the New York State Department of Environmental Conservation, Lake Skannatati Dams A, B, and C are regulated and inspected by the state to ensure their safety and functionality. The spillway of the dams is uncontrolled, with a width of 82 feet, allowing excess water to flow out during heavy rainfall events. Despite not having a formal condition assessment rating, these dams are in good standing and continue to serve as a vital water resource for the surrounding community.

As water resource and climate enthusiasts, the Lake Skannatati Dams A, B, and C offer a fascinating glimpse into the intersection of human engineering and natural ecosystem management. With their recreational primary purpose and state oversight, these dams play a crucial role in providing water storage and recreational opportunities while also being mindful of environmental impacts and risk management measures.

Year Completed

1945

Dam Length

760

Dam Height

24

River Or Stream

TR-LAKE KANAWAUKE

Primary Dam Type

Earth

Surface Area

32

Drainage Area

1.61

Nid Storage

486

Hazard Potential

Low

Nid Height

24
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.