Pattaconk Dam #3 Reservoir Report

Last Updated: December 5, 2025

Pattaconk Dam #3, also known as Abbott Pond, is a private dam located in Chester, Connecticut along the Pattaconk Brook.


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Summary

The dam is primarily used for recreational purposes and stands at a height of 13 feet with a length of 75 feet. It has a storage capacity of 7 acre-feet and covers a surface area of 1.4 acres, serving as a popular spot for outdoor activities in the region.

Managed by the Connecticut Department of Energy and Environmental Protection (DEEP), Pattaconk Dam #3 has been deemed to have a significant hazard potential but is currently in satisfactory condition as of the last assessment in November 2018. The dam has a spillway width of 65 feet and is inspected every seven years to ensure its structural integrity and safety. While there are no associated structures or locks, the dam remains a key feature in the local landscape and provides a picturesque setting for visitors to enjoy.

Situated within Middlesex County, Pattaconk Dam #3 is under state jurisdiction and receives oversight from the DEEP. With its masonry construction and recreational focus, the dam serves as both a functional structure and a scenic attraction in the area. Its location along the Pattaconk Brook makes it a significant part of the local environment, offering opportunities for water resource and climate enthusiasts to appreciate the intersection of human engineering and natural beauty.

Dam Length

75

Dam Height

13

River Or Stream

PATTACONK BROOK

Primary Dam Type

Masonry

Surface Area

1.4

Drainage Area

7.89

Nid Storage

7

Hazard Potential

Significant

Nid Height

13
       
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.
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Area Campgrounds