Black Rock Dam

BRANCH BROOK· Litchfield, Connecticut· Built 1971· Rockfill· 130 ft tall
High Hazard Flood Risk Reduction Federal Government

Physical Details

Dam Height 130 ft (taller than 99.4% in CT)
Dam Length933 ft
Dam TypeRockfill
Max Storage8.5K acre-ft
Normal Storage305 acre-ft
Surface Area21 acres
Drainage Area20 sq mi
Max Discharge33,500 cfs
Year Completed1971 (55 years old)
NID IDCT00508

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

Nearby Dams

Frequently 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.