Windsor Lake Dam Reservoir Report

Reservoir Report

Massachusetts

Nearby: Eclipse Dam Natural Bridge Dam

Last Updated: December 16, 2025

Windsor Lake Dam in Massachusetts, completed in 1883, stands as a significant structure regulating the flow of a tributary of the Hoosic River.

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Summary

The dam, primarily serving recreational purposes, boasts an earth core type with a buttress foundation, standing at a height of 27 feet and a length of 375 feet. With a normal storage capacity of 170 acre-feet and a hazard potential rated as high, the dam is subject to state regulation by the Department of Conservation and Recreation. Despite its age, the dam's condition assessment remains satisfactory as of the last inspection in April 2017.

Located in N. Adams, Windsor Lake Dam not only provides recreational opportunities but also plays a crucial role in flood control and water resource management. With a drainage area of 0.39 square miles and a surface area of 20.5 acres, the dam serves as a vital infrastructure for the local community. While the risk assessment categorizes the dam as moderate, it is essential for the state to continue monitoring and implementing appropriate risk management measures to ensure its continued safety and functionality for the future.

With a maximum storage capacity of 235 acre-feet and a hydraulic height of 21 feet, Windsor Lake Dam remains a key feature in the water resource landscape of Berkshire, Massachusetts. As a state-regulated structure with a high hazard potential, the dam requires regular inspection and maintenance to mitigate any potential risks. Climate and water resource enthusiasts may find interest in the historical significance and ongoing management of Windsor Lake Dam, highlighting the intersection of engineering, environmental conservation, and public safety.

Year Completed	1883
Dam Length	375
Dam Height	27
River Or Stream	TRIBUTARY OF HOOSIC RIVER
Primary Dam Type	Earth
Surface Area	20.5
Hydraulic Height	21
Drainage Area	0.39
Nid Storage	235
Hazard Potential	High
Foundations	Unlisted/Unknown
Nid Height	27

Explore Interactive Map

WINDSOR LAKE DAM

Reservoir Report • Water Levels • Weather Forecast

December 16, 2025

Year_Completed	1883
Dam_Length	375
Dam_Height	27
River_Or_Stream	TRIBUTARY OF HOOSIC RIVER
Primary_Dam_Type	Earth
Surface_Area	20.5
Hydraulic_Height	21
Drainage_Area	0.39
Nid_Storage	235
Hazard_Potential	High
Foundations	Unlisted/Unknown
Nid_Height	27

Seasonal Comparison

Weather Forecast

Nearby Streamflow Levels

Hoosic River Near Williamstown 91.4cfs	91cfs
Green River At Williamstown 31.1cfs	31cfs
Hoosic River At Adams 39.9cfs	40cfs
Deerfield River At Charlemont 521.0cfs	521cfs
East Branch Housatonic River At Coltsville 25.0cfs	25cfs
Walloomsac River Near North Bennington 72.1cfs	72cfs

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.