Reservoir Report

Connecticut

Last Updated: May 5, 2026

Nearby: Derby Housatonic Levee Upper Ansonia Reservoir East Dike

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Ansonia Levee, also known as Naugatuck River, is a crucial water resource infrastructure located in Ansonia, Connecticut.

Summary

Owned and regulated by the local government, this levee plays a vital role in protecting the surrounding area from the potential risks of flooding. With its state-regulated status and regular inspections, Ansonia Levee ensures the safety and security of the community it serves.

Situated along the Naugatuck River, Ansonia Levee has a high hazard potential and is considered to be in "Not Rated" condition. Despite its lack of a specific primary purpose or dam type designation, this structure is essential for managing water levels and mitigating flood risks in the region. While details about its construction and specifications are not provided, the ongoing monitoring and maintenance of Ansonia Levee demonstrate a commitment to upholding its functionality and effectiveness.

With its strategic location and significance in the local water management system, Ansonia Levee represents a crucial piece of infrastructure in the region. As climate change continues to pose challenges in terms of extreme weather events and rising sea levels, the presence of well-maintained levees like Ansonia is key to ensuring the resilience and adaptability of communities in the face of environmental threats and disasters.

Regional Streamflow Levels

Housatonic River At Stevenson 2230.0cfs	2230cfs
Naugatuck River At Beacon Falls 277.0cfs	277cfs
Mill R Nr Hamden 24.0cfs	24cfs
Pootatuck R At Sandy Hook 25.8cfs	26cfs
Pomperaug River At Southbury 71.9cfs	72cfs
Rooster River At Fairfield 5.57cfs	6cfs

15-Day Long Term Forecast

River Or Stream	NAUGATUCK RIVER
Hazard Potential	High

Seasonal Comparison

5-Day Hourly Forecast Detail

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.