Whitmans Pond Dam & Dike Reservoir Report

Last Updated: December 5, 2025

Whitmans Pond Dam & Dike, located in Thompson, Connecticut, is a significant earth dam completed in 1900 with a primary purpose of recreation.


°F

°F

mph

Wind

%

Humidity

Summary

The dam stands at 8 feet high and spans 60 feet in length, with a storage capacity of 125 acre-feet. This structure regulates the flow of Robbins Brook, covering an area of 18 acres and serving as a popular spot for water resource and climate enthusiasts to enjoy various recreational activities.

Managed by a private owner, the dam is state-regulated by the Connecticut Department of Energy and Environmental Protection (DEEP), ensuring that inspection, enforcement, and permitting are carried out to maintain its safety. Despite being categorized as having a significant hazard potential, the condition assessment of Whitmans Pond Dam & Dike in 2018 deemed it to be satisfactory. The last inspection was conducted in June 2012, with a scheduled frequency of every 7 years to monitor its structural integrity.

With its historical significance dating back over a century, Whitmans Pond Dam & Dike continues to provide a vital recreational outlet while contributing to the management of water resources in the Windham County area. As an earth dam with a sizeable storage capacity, it plays a crucial role in regulating water flow and maintaining the ecological balance of the surrounding environment. For water resource and climate enthusiasts, this structure offers a unique opportunity to appreciate the intersection of human engineering and natural landscapes in a picturesque setting.

Year Completed

1900

Dam Length

60

Dam Height

8

River Or Stream

ROBBINS BROOK

Primary Dam Type

Earth

Surface Area

18

Drainage Area

2.71

Nid Storage

125

Hazard Potential

Significant

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.