Mercers Pond Dam Reservoir Report

Last Updated: December 5, 2025

Mercers Pond Dam, also known as Mersons Pond Dam, stands proudly in Fairfield, Connecticut, along the Boggs Pond Brook.


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Summary

This private dam, completed in 1870, serves primarily for recreational purposes, offering a serene oasis for water enthusiasts and nature lovers alike. With a height of 20 feet and a length of 320 feet, this earth dam holds a maximum storage capacity of 51 acre-feet and covers a surface area of 4 acres.

Despite its age, Mercers Pond Dam remains in satisfactory condition as of the last inspection in December 2017, with a high hazard potential due to its location and design. The dam is regulated and inspected by the Connecticut Department of Energy and Environmental Protection (DEEP), ensuring its safety and compliance with state regulations. The surrounding area is at risk of inundation in the event of a breach, emphasizing the importance of proper management and maintenance to mitigate potential risks to both the dam and downstream communities.

As a key component of the local water infrastructure, Mercers Pond Dam plays a crucial role in water resource management and flood control in the Danbury area. Its picturesque setting and recreational opportunities attract visitors seeking a peaceful escape in nature, highlighting the intersection of water conservation, climate resilience, and community engagement. With ongoing monitoring and maintenance, Mercers Pond Dam continues to serve as a vital resource for both humans and wildlife, underscoring the importance of sustainable water management practices in the face of a changing climate.

Year Completed

1870

Dam Length

320

Dam Height

20

River Or Stream

BOGGS POND BROOK

Primary Dam Type

Earth

Surface Area

4

Drainage Area

4.33

Nid Storage

51

Hazard Potential

High

Nid Height

20
       
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.