Mansfield Hollow Dam - Dike C, also known as Mansfield Hollow Lake, is a gravity dam located in Willimantic, Connecticut, along the Nachaug River.
Wind
Humidity
Completed in 1952 by the US Army Corps of Engineers, the dam serves as a crucial flood risk reduction structure with a height of 78 feet and a storage capacity of 76,000 acre-feet. The dam's primary purpose is to mitigate flooding in the region, with a maximum discharge capacity of 106,500 cubic feet per second.
Managed by the US Army Corps of Engineers, Mansfield Hollow Dam - Dike C is classified as having a high hazard potential, requiring regular inspections and risk assessments. The dam's risk management measures include continuous monitoring, prioritized maintenance activities, and collaboration with local emergency managers to ensure preparedness for potential dam-related emergencies. Despite the inherent risks associated with dams, USACE works diligently to address flood risks and maintain the structural integrity of the dam to protect surrounding communities.
As part of its risk management strategy, the US Army Corps of Engineers at Mansfield Hollow Dam - Dike C emphasizes the importance of public engagement, emergency preparedness, and ongoing maintenance to minimize the impact of severe weather events and potential flood incidents. Through the development of emergency action plans, regular inspections, and coordinated efforts with local authorities, the dam continues to play a vital role in safeguarding the region against flood risks while ensuring the safety and well-being of nearby residents.
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 |
Nid Height |
78 |
Natchaug River At Willimantic
|
257cfs |
Willimantic River Near Coventry
|
157cfs |
Shetucket River Near Willimantic
|
588cfs |
Mount Hope River Near Warrenville
|
30cfs |
Little River Near Hanover
|
34cfs |
Yantic River At Yantic
|
115cfs |
| Location | Reservations | Toilets |
|---|---|---|
Highland Campground
|
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Brialee
|
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Wilderness Lake Campground
|