Lebanon Lake Dam Reservoir Report

Last Updated: December 7, 2025

Lebanon Lake Dam in Sullivan, New York, stands as a vital structure for recreation and water resource management.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1926, this earth dam boasts a height of 20 feet and a length of 175 feet, providing a storage capacity of 2520 acre-feet. Its primary purpose is to offer recreational opportunities, with a controlled spillway and low hazard potential. The dam overlooks the scenic Lebanon Lake Brook, offering a serene setting for outdoor enthusiasts.

Managed by private owners, Lebanon Lake Dam falls under the regulatory oversight of the New York State Department of Environmental Conservation. With state-permitted inspections and enforcement, the dam ensures the safety and welfare of surrounding communities. Despite its condition being labeled as "Not Rated," Lebanon Lake Dam remains a crucial asset for water management and flood control in the region.

With a risk assessment rating of "Very High (1)," the dam's risk management measures may need further attention to mitigate potential hazards. As climate change impacts water resources, Lebanon Lake Dam plays a crucial role in maintaining water supply reliability and recreational opportunities for visitors. Its strategic location and design underscore the importance of sustainable infrastructure for adapting to changing environmental conditions.

Year Completed

1926

Dam Length

175

Dam Height

20

River Or Stream

LEBANON LAKE BROOK

Primary Dam Type

Earth

Surface Area

288

Drainage Area

7

Nid Storage

2520

Hazard Potential

Low

Nid Height

20
       
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.