Arrigoni Pond Dam

HAMMONASSET RIVER· Middlesex, Connecticut· Built 1945· Earth· 21 ft tall
Significant Hazard Recreation Private

Key Takeaway

Arrigoni Pond Dam is classified as significant hazard in Connecticut. It was completed in 1945 and is 81 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 21 ft (taller than 76.6% in CT)
Dam Length100 ft
Dam TypeEarth
Max Storage83 acre-ft
Normal Storage83 acre-ft
Surface Area9 acres
Drainage Area2 sq mi
Max Discharge182 cfs
Year Completed1945 (81 years old)
NID IDCT00384

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

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

Emergency Action Plan: Yes
Last Inspection: November 22, 2019
State Regulated: Yes
Regulatory Agency: DEEP

Ownership

Richard And Kathryn Spero

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Arrigoni Pond Dam?

Arrigoni Pond Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Arrigoni Pond Dam?

Arrigoni Pond Dam is owned by Richard And Kathryn Spero (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Arrigoni Pond Dam built?

Arrigoni Pond Dam was completed in 1945, making it 81 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 Arrigoni Pond Dam?

Arrigoni Pond 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 Arrigoni Pond Dam?

Arrigoni Pond Dam has a dam height of 21 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 Arrigoni Pond Dam last inspected?

Arrigoni Pond Dam was last inspected on November 22, 2019. 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.