Thomas Pond Reservoir Report

Last Updated: December 14, 2025

Thomas Pond, located in Cumberland, Maine, is a private water resource managed by the Maine Emergency Management Agency.


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Summary

This picturesque pond, with a surface area of 442 acres, serves multiple purposes including fish and wildlife conservation, recreational activities, and water supply. The concrete dam, completed in 1935, stands at a height of 8 feet and has a hydraulic height of 6 feet, providing storage capacity of 1750 acre-feet.

Despite its low hazard potential, Thomas Pond is regulated by the state and undergoes regular inspections to ensure its structural integrity. The dam, with a length of 69 feet and a spillway width of 6 feet, is crucial for maintaining the pond's normal storage capacity of 1400 acre-feet. While the condition assessment is currently not rated, the pond's emergency action plan readiness and risk management measures are yet to be fully evaluated. As a hub for outdoor enthusiasts and environmental stewards, Thomas Pond continues to be a vital water resource in the region.

With its serene surroundings and diverse ecosystem, Thomas Pond remains a haven for water resource and climate enthusiasts. Managed for recreation and conservation purposes, this private water body is a vital asset for the community. As efforts to enhance the pond's safety and emergency preparedness continue, it stands as a shining example of responsible water resource management in Maine.

Year Completed

1935

Dam Length

69

Dam Height

8

River Or Stream

Thomas Pond Outlet

Primary Dam Type

Concrete

Surface Area

442

Hydraulic Height

6

Nid Storage

1750

Structural Height

8

Hazard Potential

Low

Nid Height

8
       
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.