West Thompson Dam Quick Facts
West Thompson Dam Map
West Thompson Dam Information
West Thompson Dam is a gravity earth dam located in Putnam, Windham, Connecticut.
The dam, which is on the Quinebaug River, was primarily built for Flood Risk Reduction purposes, but also serves for Recreation benefits.
The dam was designed by and commissioned in 1965 and is currently owned by USACE – New England District.
West Thompson Dam Structure
The West Thompson Dam is approximately 2,550 feet (777 m) long, 70 feet (21 m) high and has a structural volume of 1,184,900 cubic yards (905,921 cubic metres).
West Thompson Dam Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 1,200 acre-ft (1,480 Ml) and maximum capacity of 47,800 acre-ft (58,960 Ml).
The surface area of the reservoir is 200 acres (81 ha) and the total catchment area is 174 square miles (451 square kilometres).
West Thompson Dam Spillway
The dam has a 320 feet (98 m) wide uncontrolled spillway with a maximum discharge capacity of 63000 cubic feet per second (1784 cubic metres per second).
West Thompson Dam Compared to Five Famous American Dams
West Thompson Dam Weather
Current Conditions at West Thompson Dam
Failed to fetch current weather data.7-Day Forecast for West Thompson Dam
Failed to fetch weather forecast data.West Thompson Dam Frequently Asked Questions
West Thompson Dam is in Connecticut.
West Thompson Dam is in Windham County.
West Thompson Dam is 70 feet high.
West Thompson Dam is 2,550 feet long.
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Mansfield Hollow Dam
Somerset Dam
Townshend Dam
West Thompson Dam
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West Thompson Dam
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Condition Assessment Classification
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.
Source: National Inventory of Dams