East Brimfield Dam Reservoir Report

Last Updated: December 10, 2025

East Brimfield Dam, also known as East Brimfield Lake, is a rockfill dam located in Worcester, Massachusetts, along the Quinebaug River.


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Summary

Completed in 1960 by the US Army Corps of Engineers, the dam stands at a height of 53 feet and has a storage capacity of 71,000 acre-feet. Its primary purpose is flood risk reduction, with additional recreational benefits for the community.

The dam has a high hazard potential and undergoes regular inspections and risk assessments to ensure its structural integrity and safety. The US Army Corps of Engineers actively manages flood risks associated with the dam by monitoring its condition, prioritizing maintenance activities, and collaborating with local emergency managers to develop and update emergency action plans. Despite its risk management measures, the dam does not eliminate all flood risk, and the USACE continues to work towards addressing potential issues that may arise during severe weather events.

Overall, East Brimfield Dam plays a crucial role in protecting the surrounding area from flooding while also providing recreational opportunities for the community. With ongoing risk management efforts and proactive maintenance, the dam remains a vital infrastructure for water resource and climate enthusiasts in the region.

Year Completed

1960

Dam Length

520

Dam Height

53

River Or Stream

QUINEBAUG RIVER

Primary Dam Type

Rockfill

Surface Area

360

Hydraulic Height

48

Drainage Area

68

Nid Storage

71000

Structural Height

53

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

53
       
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.