Leesville Dam Reservoir Report

Last Updated: December 5, 2025

Leesville Dam, also known as Leesville Pond, is a captivating water resource located in East Haddam, Connecticut.


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Summary

This state-owned dam, completed in 1900, stands 25 feet tall and stretches 450 feet in length, with a storage capacity of 138 acre-feet. Situated on the Salmon River, this earth dam serves primarily for recreational purposes, offering visitors a serene and picturesque setting for various outdoor activities.

With a high hazard potential but a satisfactory condition assessment as of September 2020, Leesville Dam is closely monitored by the Connecticut Department of Energy and Environmental Protection (DEEP). The dam's spillway width of 135 feet and maximum discharge capacity of 10,232 cubic feet per second ensure proper water management and safety measures. While no associated structures or locks exist, the dam's location within Middlesex County provides a vital source of water storage and flood control for the surrounding area.

Water resource and climate enthusiasts can explore the historical significance and environmental impact of Leesville Dam, delving into its role in water conservation and ecosystem maintenance. As a state-regulated structure with a rich heritage dating back over a century, Leesville Dam offers a unique glimpse into the intersection of human engineering and natural landscapes, inviting visitors to appreciate the beauty and importance of sustainable water management practices in the face of changing climate dynamics.

Year Completed

1900

Dam Length

450

Dam Height

25

River Or Stream

SALMON RIVER

Primary Dam Type

Earth

Surface Area

10

Drainage Area

111

Nid Storage

138

Hazard Potential

High

Nid Height

25
       
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.
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Area Campgrounds