Assabet
Key Takeaway
Assabet is classified as significant hazard in Massachusetts. It was completed in 1921 and is 105 years old. Its primary use is hydroelectric. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 13 ft (taller than 39.5% in MA) |
| Dam Length | 480 ft |
| Dam Type | Masonry |
| Max Storage | 122 acre-ft |
| Normal Storage | 122 acre-ft |
| Surface Area | 30 acres |
| Drainage Area | 123 sq mi |
| Max Discharge | 3,350 cfs |
| Year Completed | 1921 (105 years old) |
| NID ID | MA00128 |
Safety Information
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?
Ownership
Acton Hydro Company, Inc.
Private
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Significant Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Assabet?
Assabet 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 Assabet?
Assabet is owned by Acton Hydro Company, Inc. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Assabet built?
Assabet was completed in 1921, making it 105 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 Assabet?
Assabet serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Assabet?
Assabet has a dam height of 13 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 Assabet last inspected?
Assabet was last inspected on June 16, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.