Neponset River Dam
Key Takeaway
Neponset River Dam is classified as low hazard in Massachusetts. It was completed in 1850 and is 176 years old. Its primary use is other.
Physical Details
| Dam Height | 15 ft (taller than 48.8% in MA) |
| Dam Length | 150 ft |
| Dam Type | Masonry |
| Max Storage | 153 acre-ft |
| Normal Storage | 55 acre-ft |
| Drainage Area | 11 sq mi |
| Year Completed | 1850 (176 years old) |
| NID ID | MA03137 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
TOWN OF WALPOLE, DEPARTMENT OF PUBLIC WORKS
Local Government
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High Hazard 19 ftFrequently Asked Questions
What is the hazard classification of Neponset River Dam?
Neponset River Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Neponset River Dam?
Neponset River Dam is owned by TOWN OF WALPOLE, DEPARTMENT OF PUBLIC WORKS (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Neponset River Dam built?
Neponset River Dam was completed in 1850, making it 176 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 Neponset River Dam?
Neponset River Dam serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Neponset River Dam?
Neponset River Dam has a dam height of 15 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 Neponset River Dam last inspected?
Neponset River Dam was last inspected on February 26, 2009. Inspection dates indicate when a formal review occurred, not the results of that inspection.