Great Pond Upper Reservoir Dam
Key Takeaway
Great Pond Upper Reservoir Dam is classified as high hazard in Massachusetts. It was completed in 1942 and is 84 years old. Its primary use is water supply. 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 | 18 ft (taller than 63.9% in MA) |
| Dam Length | 2,775 ft |
| Dam Type | Earth |
| Max Storage | 2.3K acre-ft |
| Normal Storage | 1.9K acre-ft |
| Surface Area | 172 acres |
| Drainage Area | 5 sq mi |
| Year Completed | 1942 (84 years old) |
| NID ID | MA00823 |
Safety Information
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?
Ownership
TRI-TOWN WATER BOARD
Local Government
Nearby Dams
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High Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Great Pond Upper Reservoir Dam?
Great Pond Upper 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 Great Pond Upper Reservoir Dam?
Great Pond Upper Reservoir Dam is owned by TRI-TOWN WATER BOARD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Great Pond Upper Reservoir Dam built?
Great Pond Upper Reservoir Dam was completed in 1942, making it 84 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 Great Pond Upper Reservoir Dam?
Great Pond Upper Reservoir Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Great Pond Upper Reservoir Dam?
Great Pond Upper Reservoir Dam has a dam height of 18 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 Great Pond Upper Reservoir Dam last inspected?
Great Pond Upper Reservoir Dam was last inspected on October 14, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.