Aldon Mill Pond Dam

TANKERHOOSEN RIVER· Tolland, Connecticut· Built 1920· Masonry· 25 ft tall
Significant Hazard Recreation State Government

Key Takeaway

Aldon Mill Pond Dam is classified as significant hazard in Connecticut. It was completed in 1920 and is 106 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 25 ft (taller than 83% in CT)
Dam Length95 ft
Dam TypeMasonry
Max Storage87 acre-ft
Normal Storage37 acre-ft
Surface Area7 acres
Drainage Area13 sq mi
Max Discharge2,435 cfs
Year Completed1920 (106 years old)
NID IDCT00622

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: January 23, 2015
State Regulated: Yes
Regulatory Agency: DEEP

Ownership

Connecticut DEEP

State Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Aldon Mill Pond Dam?

Aldon Mill 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 Aldon Mill Pond Dam?

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

When was Aldon Mill Pond Dam built?

Aldon Mill Pond Dam was completed in 1920, making it 106 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 Aldon Mill Pond Dam?

Aldon Mill 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 Aldon Mill Pond Dam?

Aldon Mill Pond Dam has a dam height of 25 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 Aldon Mill Pond Dam last inspected?

Aldon Mill Pond Dam was last inspected on January 23, 2015. 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.