Mansfield Hollow Dam, also known as Mansfield Hollow Lake, is a Federal-owned structure located in Windham, Connecticut.
Wind
Humidity
Built in 1952 by the US Army Corps of Engineers, this gravity dam stands at a height of 78 feet and has a storage capacity of 76,000 acre-feet. Its primary purpose is flood risk reduction along the Nachaug River, with a normal storage capacity of 2,800 acre-feet and a maximum discharge of 106,500 cubic feet per second.
With a high hazard potential, Mansfield Hollow Dam is regularly inspected and maintained by the US Army Corps of Engineers to manage flood risks effectively. The dam has an Emergency Action Plan in place, updated regularly, and meets all safety guidelines to ensure the surrounding communities are prepared for any emergencies. The Corps works closely with local authorities to develop evacuation plans and conduct risk assessments to mitigate potential threats. Continuous monitoring and proactive risk management measures are implemented to maintain the dam's structural integrity and safeguard the area from the impacts of severe weather events and flooding.
Year Completed |
1952 |
Dam Length |
14050 |
Dam Height |
78 |
River Or Stream |
NACHAUG RIVER |
Primary Dam Type |
Gravity |
Surface Area |
450 |
Hydraulic Height |
74 |
Drainage Area |
159 |
Nid Storage |
76000 |
Structural Height |
78 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
78 |
Natchaug River At Willimantic
|
257cfs |
Shetucket River Near Willimantic
|
588cfs |
Willimantic River Near Coventry
|
157cfs |
Mount Hope River Near Warrenville
|
30cfs |
Little River Near Hanover
|
34cfs |
Yantic River At Yantic
|
115cfs |