Flowed Land Dam Reservoir Report

Last Updated: December 16, 2025

Flowed Land Dam, located in Newcomb, Essex County, New York, is a state-owned masonry dam completed in 1926 for recreational purposes.


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Summary

Situated along the Opalescent River, this dam has a height of 20 feet and a length of 100 feet, with a maximum storage capacity of 720 acre-feet. With a low hazard potential and a moderate risk assessment, the dam is classified as "Not Rated" in terms of its condition assessment.

The Flowed Land Dam features an uncontrolled spillway with a width of 90 feet and has a normal storage capacity of 432 acre-feet spread over a surface area of 58 acres. Despite being last inspected in 1979, the dam is regulated, permitted, inspected, and enforced by the New York State Department of Environmental Conservation (NYS DEC). The dam plays a crucial role in providing recreational opportunities in the area while effectively managing water resources along the Opalescent River.

With its historical significance dating back to the early 20th century, the Flowed Land Dam serves as a testament to New York State's commitment to water resource management and recreation. As a vital structure along the Opalescent River, the dam continues to be a focal point for water resource and climate enthusiasts who appreciate the engineering marvel and environmental impact of such infrastructure in the region.

Year Completed

1926

Dam Length

100

Dam Height

20

River Or Stream

OPALESCENT RIVER

Primary Dam Type

Masonry

Surface Area

58

Nid Storage

720

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.