Thomaston Dam
NAUGATUCK RIVER·
Litchfield, Connecticut·
Built 1960·
Rockfill·
137 ft tall
Physical Details
| Dam Height | 137 ft (taller than 99.6% in CT) |
| Dam Length | 2,000 ft |
| Dam Type | Rockfill |
| Max Storage | 63.0K acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 97 sq mi |
| Max Discharge | 132,200 cfs |
| Year Completed | 1960 (66 years old) |
| NID ID | CT00501 |
Safety Information
High Hazard
Loss of human life is likely if the dam fails
Emergency Action Plan: Yes
Last Inspection: June 4, 2019
State Regulated: No
Ownership
USACE - New England District
Federal Government
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Significant Hazard 8 ftFrequently Asked Questions
What is the hazard classification of Thomaston Dam?
Thomaston Dam is classified as High Hazard. Loss of human life is likely if the dam fails.
Who owns Thomaston Dam?
Thomaston Dam is owned by USACE - New England District (Federal Government).
When was Thomaston Dam last inspected?
Thomaston Dam was last inspected on June 4, 2019.
When was Thomaston Dam built?
Thomaston Dam was completed in 1960, making it 66 years old.
Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.