Neponset River Dam - Lower Mills
Key Takeaway
Neponset River Dam - Lower Mills is classified as significant hazard in Massachusetts. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 15 ft (taller than 48.8% in MA) |
| Dam Length | 140 ft |
| Dam Type | Concrete |
| Max Storage | 250 acre-ft |
| Normal Storage | 220 acre-ft |
| Surface Area | 64 acres |
| Drainage Area | 109 sq mi |
| NID ID | MA01093 |
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
DCR - DEPT. OF CONSERVATION & RECREATION
State Government
Nearby Dams
Pine Tree Brook Pl-566 Flood Control Dam
Norfolk, MA
Significant Hazard 21 ftNeponset River Dam - Hyde Park
Norfolk, MA
Significant Hazard 22 ftBlue Hills Reservoir Dam
Norfolk, MA
High Hazard 36 ftWestinghouse Dam
Suffolk, MA
Significant Hazard 15 ftGreat Pond Dam
Norfolk, MA
High Hazard 10 ftBraintree Dam
Norfolk, MA
High Hazard 37 ftGreat Pond Upper Reservoir Dam
Norfolk, MA
High Hazard 18 ftCentennial Dam
Norfolk, MA
High Hazard 21 ftFrequently Asked Questions
What is the hazard classification of Neponset River Dam - Lower Mills?
Neponset River Dam - Lower Mills 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 Neponset River Dam - Lower Mills?
Neponset River Dam - Lower Mills is owned by DCR - DEPT. OF CONSERVATION & RECREATION (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
What is the primary purpose of Neponset River Dam - Lower Mills?
Neponset River Dam - Lower Mills serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Neponset River Dam - Lower Mills?
Neponset River Dam - Lower Mills 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 - Lower Mills last inspected?
Neponset River Dam - Lower Mills was last inspected on March 29, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.