Valley Pond Dam Reservoir Report

Last Updated: December 5, 2025

Valley Pond Dam, located in Harwinton, Connecticut, is a state-regulated structure built in 1900 with a primary purpose of recreation.


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Summary

The dam, standing at a height of 21 feet and stretching 200 feet in length, creates a reservoir with a storage capacity of 135 acre-feet. Situated on Leadmine Brook, this earth dam not only provides recreational opportunities but also serves as a significant water resource in the area.

Despite its age, Valley Pond Dam has been assessed as satisfactory in condition, with a significant hazard potential. The dam is inspected every 7 years, with the last assessment conducted in April 2015. It is reassuring to note that emergency action plans have been prepared for the dam, indicating a proactive approach to risk management. The dam's location in the Litchfield County offers a serene environment for water and climate enthusiasts to appreciate the role of such structures in maintaining water resources and supporting local ecosystems.

With its historical significance and vital role in water management, Valley Pond Dam stands as a testament to the intersection of human ingenuity and environmental stewardship. As climate change continues to impact water resources, it is crucial to monitor and maintain such structures to ensure their safety and efficacy in the face of evolving environmental challenges. For enthusiasts interested in water resource management and climate adaptation, Valley Pond Dam provides a fascinating case study of the intersection between infrastructure, recreation, and environmental conservation.

Year Completed

1900

Dam Length

200

Dam Height

21

River Or Stream

LEADMINE BROOK

Primary Dam Type

Earth

Surface Area

15

Drainage Area

0.21

Nid Storage

135

Hazard Potential

Significant

Nid Height

21
       
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.