Weymouth Great Pond Dam
Key Takeaway
Weymouth Great Pond Dam is classified as significant hazard in Massachusetts. It was completed in 1884 and is 142 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 9 ft (taller than 12.4% in MA) |
| Dam Length | 190 ft |
| Dam Type | Earth |
| Max Storage | 2.8K acre-ft |
| Normal Storage | 2.0K acre-ft |
| Surface Area | 450 acres |
| Drainage Area | 3 sq mi |
| Year Completed | 1884 (142 years old) |
| NID ID | MA00777 |
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
TOWN OF WEYMOUTH, DEPARTMENT OF PUBLIC WORKS
Local Government
Nearby Dams
Smelt Brook Dam
Norfolk, MA
High Hazard 15 ftCushing Pond Dam
Plymouth, MA
Significant Hazard 12 ftArmstrong Pond Dam
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High Hazard 20 ftWhitmans Pond Dam
Norfolk, MA
High Hazard 15 ftAmes Pond Dam
Plymouth, MA
Significant Hazard 15 ftLake Holbrook Dam
Norfolk, MA
Significant Hazard 10 ftIron Hill Dam
Norfolk, MA
High Hazard 26 ftIsland Grove Pond Dam
Plymouth, MA
Significant Hazard 12 ftFrequently Asked Questions
What is the hazard classification of Weymouth Great Pond Dam?
Weymouth Great 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 Weymouth Great Pond Dam?
Weymouth Great Pond Dam is owned by TOWN OF WEYMOUTH, DEPARTMENT OF PUBLIC WORKS (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Weymouth Great Pond Dam built?
Weymouth Great Pond Dam was completed in 1884, making it 142 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 Weymouth Great Pond Dam?
Weymouth Great Pond 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 Weymouth Great Pond Dam?
Weymouth Great Pond Dam has a dam height of 9 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 Weymouth Great Pond Dam last inspected?
Weymouth Great Pond Dam was last inspected on December 9, 2016. Inspection dates indicate when a formal review occurred, not the results of that inspection.