Quaddick Reservoir Dam

FIVEMILE RIVER· Windham, Connecticut· Built 1900· Earth· 19 ft tall
High Hazard Recreation State Government

Key Takeaway

Quaddick Reservoir Dam is classified as high hazard in Connecticut. It was completed in 1900 and is 126 years old. Its primary use is recreation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.

Physical Details

Dam Height 19 ft (taller than 71.2% in CT)
Dam Length420 ft
Dam TypeEarth
Max Storage5.1K acre-ft
Normal Storage4.3K acre-ft
Surface Area467 acres
Drainage Area24 sq mi
Max Discharge2,500 cfs
Year Completed1900 (126 years old)
NID IDCT00184

Safety Information

High Hazard

Loss of human life is likely if the dam fails.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: Yes
Last Inspection: October 6, 2020
State Regulated: Yes
Regulatory Agency: DEEP

Ownership

Connecticut DEEP

State Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Quaddick Reservoir Dam?

Quaddick Reservoir Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Quaddick Reservoir Dam?

Quaddick Reservoir Dam is owned by Connecticut DEEP (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Quaddick Reservoir Dam built?

Quaddick Reservoir Dam was completed in 1900, making it 126 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

What is the primary purpose of Quaddick Reservoir Dam?

Quaddick Reservoir Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Quaddick Reservoir Dam?

Quaddick Reservoir Dam has a dam height of 19 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.

When was Quaddick Reservoir Dam last inspected?

Quaddick Reservoir Dam was last inspected on October 6, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.

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.