Frog Pond Dam Reservoir Report
Nearby: Robinson Pond Dam Lake Marie Dam
Last Updated: December 25, 2025
Frog Pond Dam, located in Windham, Connecticut, is a private-owned structure built in 1870 primarily for recreational purposes.
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Summary
The dam stands at a height of 10 feet and has a length of 130 feet, creating a surface area of 17.4 acres with a maximum storage capacity of 50 acre-feet. Situated along the Indian Hollow Brook, this earth-type dam is regulated by the Connecticut Department of Energy and Environmental Protection (DEEP) and undergoes regular inspections to ensure its satisfactory condition.
With a significant hazard potential, Frog Pond Dam plays a crucial role in managing water resources in the region. The dam's maximum discharge capacity is 287 cubic feet per second, making it an important structure in flood control and water management efforts. Despite its age, the dam has been assessed to be in satisfactory condition as of its last inspection in November 2015, with a regular inspection frequency of 5 years to monitor any potential risks or issues.
Enthusiasts interested in water resource management and climate resilience will find Frog Pond Dam an intriguing case study in how historic structures are maintained and regulated to ensure public safety and environmental protection. As a recreational dam, it serves both practical and leisure purposes, highlighting the importance of balancing human activities with nature conservation efforts. With its location in a picturesque setting in Windham, Connecticut, Frog Pond Dam is not only a functional infrastructure but also a symbol of the harmonious relationship between humans and the natural environment.
Year Completed |
1870 |
Dam Length |
130 |
Dam Height |
10 |
River Or Stream |
INDIAN HOLLOW BROOK |
Primary Dam Type |
Earth |
Surface Area |
17.4 |
Drainage Area |
1.87 |
Nid Storage |
50 |
Hazard Potential |
Significant |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Shetucket River Near Willimantic
|
702cfs |
Natchaug River At Willimantic
|
320cfs |
Little River Near Hanover
|
44cfs |
Willimantic River Near Coventry
|
161cfs |
Yantic River At Yantic
|
105cfs |
Mount Hope River Near Warrenville
|
38cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Frog Pond Dam
Beaver Brook Pond