Asylum Reservoir #2 Dam Reservoir Report

Last Updated: December 5, 2025

Asylum Reservoir #2 Dam, located in Middletown, Connecticut, is a state-owned structure designed for water supply purposes.


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Summary

It is situated along the Reservoir Brook and stands at a height of 35 feet with a length of 800 feet, providing a storage capacity of 390 acre-feet. The dam is primarily made of masonry and stone, resting on rock and soil foundations, making it a significant component of Connecticut's water resource infrastructure.

Despite being classified as having a significant hazard potential, the dam is in fair condition as of the last inspection in February 2020. It is regulated by the Connecticut Department of Energy and Environmental Protection (DEEP) and undergoes regular inspections to ensure compliance with safety standards. The dam features valve outlet gates and serves as a vital resource for maintaining water supply in the area, highlighting its importance in the region's water management system.

With its key role in water supply and a notable storage capacity, Asylum Reservoir #2 Dam represents a critical piece of infrastructure in Middlesex County, Connecticut. As climate change impacts water resources, the dam's condition assessment and regular inspections are vital for ensuring its continued functionality and resilience in the face of evolving environmental challenges. Asylum Reservoir #2 Dam stands as a testament to the proactive approach taken by state agencies in safeguarding water resources and infrastructure for the benefit of the community and the environment.

Dam Length

800

Dam Height

35

River Or Stream

RESERVOIR BROOK

Primary Dam Type

Masonry

Surface Area

13.6

Drainage Area

0.25

Nid Storage

390

Outlet Gates

Valve

Hazard Potential

Significant

Foundations

Rock, Soil

Nid Height

35
       
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.