Mcmanus Pond Dam Reservoir Report

Last Updated: December 5, 2025

Mcmanus Pond Dam, located in Stamford, Connecticut, is a private-owned structure regulated by the state's Department of Energy and Environmental Protection (DEEP).


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Summary

With a primary purpose of recreation, this concrete dam stands at a height of 10 feet and stretches 120 feet in length, creating a surface area of 3.7 acres. The dam holds back Haviland Brook and serves as a popular spot for outdoor activities in the area.

Despite its satisfactory condition assessment as of September 2020, Mcmanus Pond Dam poses a significant hazard potential due to its location and structure. Regular inspections are conducted every five years to ensure its safety and functionality. The dam's spillway width of 70 feet helps manage water flow during times of high discharge, further emphasizing the importance of proper maintenance and monitoring for water resource and climate enthusiasts interested in the dam's ecological impact on the surrounding area.

As a key component in the local landscape, Mcmanus Pond Dam not only provides recreational opportunities but also highlights the delicate balance between water resource management and environmental safety. With state-regulated oversight and a history of satisfactory conditions, this dam serves as a focal point for ongoing discussions on dam safety and the preservation of natural habitats in Fairfield County, Connecticut.

Dam Length

120

Dam Height

10

River Or Stream

HAVILAND BROOK

Primary Dam Type

Concrete

Surface Area

3.7

Drainage Area

1.93

Hazard Potential

Significant

Nid Height

10
       
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.