Sucker Brook Flood Control Dam Reservoir Report

Last Updated: December 6, 2025

The Sucker Brook Flood Control Dam, also known as the Sucker Brook Reservoir, is a significant water resource infrastructure in Winchester, Connecticut.


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Summary

Completed in 1970, this state-owned dam stands at a height of 68 feet and stretches for 1160 feet along Sucker Brook, providing crucial flood risk reduction for the surrounding area. With a capacity for 1995 acre-feet of storage and a maximum discharge of 6400 cubic feet per second, this dam plays a vital role in protecting the community from potential flooding events.

Managed by the Connecticut Department of Energy and Environmental Protection (DEEP), the Sucker Brook Flood Control Dam is subject to regular inspections to ensure its structural integrity and operational effectiveness. While classified as having a high hazard potential, the dam's condition has been assessed as satisfactory, reflecting the diligent maintenance and monitoring efforts in place. Additionally, emergency action plans are in place to guide response measures in case of a dam failure, demonstrating a commitment to public safety and disaster preparedness.

Located in Litchfield County, the Sucker Brook Flood Control Dam serves as a crucial piece of infrastructure in the region's water resource management system. With its primary purpose of flood risk reduction and adherence to state regulations, this dam exemplifies the importance of proactive measures in safeguarding communities against the impacts of extreme weather events and ensuring sustainable water resource management practices.

Year Completed

1970

Dam Length

1160

Dam Height

68

River Or Stream

SUCKER BROOK

Drainage Area

3.43

Nid Storage

1995

Hazard Potential

High

Nid Height

68
       
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.