Black Rock Dam
BRANCH BROOK·
Litchfield, Connecticut·
Built 1971·
Rockfill·
130 ft tall
Physical Details
| Dam Height | 130 ft (taller than 99.4% in CT) |
| Dam Length | 933 ft |
| Dam Type | Rockfill |
| Max Storage | 8.5K acre-ft |
| Normal Storage | 305 acre-ft |
| Surface Area | 21 acres |
| Drainage Area | 20 sq mi |
| Max Discharge | 33,500 cfs |
| Year Completed | 1971 (55 years old) |
| NID ID | CT00508 |
Safety Information
High Hazard
Loss of human life is likely if the dam fails
Emergency Action Plan: Yes
Last Inspection: October 25, 2023
State Regulated: No
Ownership
USACE - New England District
Federal Government
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Significant Hazard 13 ftFrequently Asked Questions
What is the hazard classification of Black Rock Dam?
Black Rock Dam is classified as High Hazard. Loss of human life is likely if the dam fails.
Who owns Black Rock Dam?
Black Rock Dam is owned by USACE - New England District (Federal Government).
When was Black Rock Dam last inspected?
Black Rock Dam was last inspected on October 25, 2023.
When was Black Rock Dam built?
Black Rock Dam was completed in 1971, making it 55 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.