Wolf Lake Inc Dam Reservoir Report

Last Updated: December 24, 2025

Wolf Lake INC Dam, located in Sullivan, New York, is a privately owned structure with a primary purpose of recreation.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1940, this earth-type dam stands at 7 feet high and spans 223 feet in length, with a storage capacity of 70 acre-feet. Situated on the TR-WOLF LAKE river/stream, the dam's controlled spillway width is 18 feet, and it poses a low hazard potential with a very high risk assessment rating of 1.

Managed by the New York State Department of Environmental Conservation (NYS DEC), the Wolf Lake INC Dam is regulated, permitted, inspected, and enforced at the state level. While the dam's condition is currently not rated, it undergoes regular inspections, with the last one being in August 2009. Despite being non-Federal, the dam's risk management measures and emergency action plans are not explicitly outlined, leaving room for potential improvements in safety protocols.

The dam's location near Yankee Lake offers a surface area of 28 acres for recreational activities, attracting water resource and climate enthusiasts. With its historical significance dating back to the mid-20th century, Wolf Lake INC Dam serves as a vital structure for maintaining water levels and providing leisure opportunities in the region, amidst ongoing efforts to enhance its safety and emergency preparedness.

Year Completed

1940

Dam Length

223

Dam Height

7

River Or Stream

TR-WOLF LAKE

Primary Dam Type

Earth

Surface Area

28

Drainage Area

0.7

Nid Storage

70

Hazard Potential

Low

Nid Height

7
       
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.