Indian Hollow Pond Dam Reservoir Report

Last Updated: December 25, 2025

Indian Hollow Pond Dam, located in Windham, Connecticut, is a privately owned earth dam completed in 1900 for recreational purposes.


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Summary

The dam stands at a height of 9 feet and spans a length of 260 feet, with a storage capacity of 50 acre-feet and a surface area of 6.4 acres. Situated on Frog Brook, this dam is regulated by the Department of Energy and Environmental Protection (DEEP) in Connecticut.

Despite its low hazard potential, Indian Hollow Pond Dam has not been assessed for its condition and does not have an Emergency Action Plan (EAP) in place. The dam has a spillway width of 30 feet and a maximum discharge capacity of 361 cubic feet per second. While it has not been modified in recent years, regular inspections are conducted every 10 years to ensure its structural integrity and safety.

For water resource and climate enthusiasts, Indian Hollow Pond Dam serves as a valuable recreational asset in the region, providing opportunities for outdoor activities and enjoyment. Its presence on Frog Brook contributes to the local ecosystem and water management efforts, highlighting the importance of maintaining and monitoring dams for both safety and environmental conservation purposes.

Year Completed

1900

Dam Length

260

Dam Height

9

River Or Stream

FROG BROOK

Primary Dam Type

Earth

Surface Area

6.4

Drainage Area

3.41

Nid Storage

50

Hazard Potential

Low

Nid Height

9
       
Seasonal Comparison

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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.