Fox Lake Dam Reservoir Report

Last Updated: December 7, 2025

Fox Lake Dam, located in Yulan, Sullivan County, New York, is a privately owned rockfill dam with a primary purpose of recreation.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1900, this dam stands at a height of 9 feet and has a length of 150 feet, creating a surface area of 26 acres and a storage capacity of 115 acre-feet. The dam is situated on Dunn Brook and is regulated by the New York State Department of Environmental Conservation (NYS DEC).

Despite being classified as having a low hazard potential, Fox Lake Dam has a moderate risk assessment rating. The dam is currently in a not rated condition assessment status, with the last inspection conducted in 1901. While it does not have an Emergency Action Plan (EAP) prepared or meet EAP guidelines, the dam is regularly inspected, permitted, and enforced by the state regulatory agency. The surrounding area is under the jurisdiction of the state, ensuring that the dam is maintained and monitored for any potential risks.

The picturesque Fox Lake Dam provides opportunities for recreational activities in the area while also serving as a water resource for the community. As climate and water resource enthusiasts, the data on Fox Lake Dam showcases the importance of proper dam management and maintenance to mitigate potential risks and ensure the safety and sustainability of the surrounding environment.

Year Completed

1900

Dam Length

150

Dam Height

9

River Or Stream

DUNN BROOK

Primary Dam Type

Rockfill

Surface Area

26

Nid Storage

115

Hazard Potential

Low

Nid Height

9
       
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.