Trails Pond Dam - Spillway Removed 2012 Reservoir Report

Last Updated: December 5, 2025

Trails Pond Dam, also known as Trails Pond (Dewatered), underwent a significant change in 2012 when its spillway was removed.


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Summary

Located in Groton, Connecticut, this private dam on Birch Plain Creek was originally completed in 1880 with a height of 12.4 feet and a storage capacity of 53 acre-feet. The dam, primarily designated as an Earth-type structure, served a variety of purposes and was regulated by the state Department of Energy and Environmental Protection (DEEP).

Following the removal of the spillway in 2012, the dam's hazard potential and condition assessment were labeled as 'Undetermined' and 'Not Rated', respectively. Despite lacking recent inspections and risk assessments, the dam remains an integral part of the local landscape with its historical significance and environmental impact on the surrounding area. As water resource and climate enthusiasts explore the implications of this dam modification, there is a growing interest in understanding its role in the ecosystem and potential future developments.

With its unique history and ecological importance, Trails Pond Dam continues to spark discussions among water resource and climate enthusiasts. As stakeholders navigate the complexities of dam management and regulation, the removal of the spillway in 2012 stands as a pivotal moment in the dam's evolution. As efforts to assess its condition and potential risks progress, the legacy of Trails Pond Dam serves as a reminder of the intricate balance between human infrastructure and natural ecosystems in the face of changing environmental conditions.

Year Completed

1880

Dam Length

300

Dam Height

12.4

River Or Stream

BIRCH PLAIN CREEK

Primary Dam Type

Earth

Surface Area

7

Drainage Area

0.97

Nid Storage

53

Hazard Potential

Undetermined

Nid Height

12
       
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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.