Lake Glen Dam Reservoir Report

Last Updated: December 5, 2025

Lake Glen Dam, also known as Glen Lake Dam, is a concrete structure located in Woodbridge, Connecticut.


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Summary

Built in 1907, this dam serves as a crucial water supply source with a storage capacity of 710 acre-feet and a surface area of 23 acres. The dam stands at a height of 62 feet and spans a length of 380 feet, harnessing the waters of the Sargent River for the surrounding area.

Managed by the state regulatory agency DEEP, Lake Glen Dam is inspected regularly to ensure its structural integrity and adherence to safety standards. With a high hazard potential but a satisfactory condition assessment as of November 2019, the dam is equipped with slide gates for outlet control and has a spillway width of 40 feet. As a vital component of the water infrastructure in New Haven County, Lake Glen Dam plays a pivotal role in managing water resources and mitigating potential risks associated with its operation.

Water resource and climate enthusiasts will appreciate the significance of Lake Glen Dam in maintaining a reliable water supply for the region. Its historical significance, combined with its modern safety measures and regulatory oversight, demonstrate a commitment to sustainable water management practices. As climate change continues to impact water resources, the management of structures like Lake Glen Dam will be crucial in adapting to changing conditions and ensuring the resilience of water infrastructure in the face of uncertainty.

Year Completed

1907

Dam Length

380

Dam Height

62

River Or Stream

SARGENT RIVER

Primary Dam Type

Concrete

Surface Area

23

Drainage Area

5.7

Nid Storage

710

Outlet Gates

Slide (sluice gate)

Hazard Potential

High

Foundations

Rock

Nid Height

62
       
Seasonal Comparison

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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.