Little Dam Lake Dam Reservoir Report

Last Updated: December 6, 2025

Little Dam Lake Dam, located in Southfields, New York, is a state-regulated earth dam completed in 1897 with a primary purpose of recreation.


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Summary

Standing at a height of 11.5 feet and a length of 465 feet, this dam holds a normal storage capacity of 122.5 acre-feet and has a surface area of 36.8 acres. The dam, situated on the TR-RAMAPO RIVER, is under the jurisdiction of the NYS DEC and is inspected regularly to ensure its satisfactory condition.

With a hazard potential classified as high and a moderate risk assessment rating, Little Dam Lake Dam is equipped with an uncontrolled spillway that is 75 feet wide. Despite its age, the dam has been deemed to meet safety guidelines, with emergency action plans in place. The last inspection in December 2020 showed that the dam was in satisfactory condition, enforcing its reputation as a crucial water resource for the surrounding community and a popular spot for recreational activities. This historical structure continues to play a significant role in managing water resources and providing enjoyment for locals and visitors alike.

Year Completed

1897

Dam Length

465

Dam Height

11.5

River Or Stream

TR-RAMAPO RIVER

Primary Dam Type

Earth

Surface Area

36.8

Nid Storage

191

Hazard Potential

High

Nid Height

12
       
Seasonal Comparison

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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.