Stony Batter Pond Dam Reservoir Report

Last Updated: December 6, 2025

Stony Batter Pond Dam, located in Cornwall, Connecticut, is a private earth dam completed in 1945 with a primary purpose of recreation.


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Summary

Sitting on Millard Brook, this dam has a height of 12 feet and a length of 600 feet, providing a storage capacity of 54 acre-feet. With a surface area of 10 acres and a drainage area of 0.16 square miles, this dam is a significant water resource in the area.

Managed by the Connecticut Department of Energy and Environmental Protection (DEEP), Stony Batter Pond Dam is regulated, permitted, inspected, and enforced by the state, ensuring its safety and compliance with regulations. Despite being considered to have a significant hazard potential, the dam's condition assessment is currently marked as "Not Rated," with inspection frequency set at 7 years.

Water and climate enthusiasts can appreciate the importance of Stony Batter Pond Dam in providing recreational opportunities while also ensuring the safety and management of water resources in Litchfield County. With its historic significance and vital role in water storage and management, this dam showcases the intersection of human engineering with natural ecosystems, making it a fascinating site for exploration and study.

Year Completed

1945

Dam Length

600

Dam Height

12

River Or Stream

MILLARD BROOK

Primary Dam Type

Earth

Surface Area

10

Drainage Area

0.16

Nid Storage

54

Hazard Potential

Significant

Nid Height

12
       
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.