Easton Reservoir Dam Reservoir Report

Last Updated: December 5, 2025

Easton Reservoir Dam, located in Easton, Connecticut, is a picturesque concrete dam built in 1926 primarily for water supply purposes.


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Summary

Standing at a height of 123 feet and stretching 1040 feet in length, the dam holds a maximum storage capacity of 36,000 acre-feet with a surface area of 488 acres. The reservoir is fed by the Mill River and serves as a critical water resource for the Fairfield County region.

Managed by the Department of Energy and Environmental Protection (DEEP) in Connecticut, the dam is subject to state regulation, inspection, and enforcement to ensure its structural integrity and safety. Despite being classified as having a high hazard potential, the dam's condition assessment is rated as fair, and it has a moderate risk level. With an uncontrolled spillway and slide gates for outlet control, the Easton Reservoir Dam plays a vital role in mitigating flood risks and providing water security to the surrounding communities.

Enthusiasts interested in water resources and climate change will find the Easton Reservoir Dam a fascinating example of infrastructure designed to balance water supply needs with environmental considerations. The dam's historic significance, coupled with its functionality in managing water resources and reducing flood risks, highlights the importance of sustainable water management practices in the face of a changing climate. With ongoing inspections and risk assessments, the Easton Reservoir Dam serves as a symbol of resilience and adaptation to ensure the region's water security for years to come.

Year Completed

1926

Dam Length

1040

Dam Height

123

River Or Stream

MILL RIVER

Primary Dam Type

Concrete

Surface Area

488

Drainage Area

12.8

Nid Storage

36000

Outlet Gates

Slide (sluice gate)

Hazard Potential

High

Foundations

Rock

Nid Height

123
       
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.