Hopkinton
Key Takeaway
Hopkinton is classified as low hazard in New Hampshire. It was completed in 1890 and is 136 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 10 ft (taller than 16% in NH) |
| Dam Length | 325 ft |
| Dam Type | Concrete |
| Max Storage | 380 acre-ft |
| Normal Storage | 380 acre-ft |
| Surface Area | 110 acres |
| Drainage Area | 437 sq mi |
| Max Discharge | 7,000 cfs |
| Year Completed | 1890 (136 years old) |
| NID ID | NH00204 |
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 Hopkinton, NH
Local Government
Nearby Dams
Hopkinton Sewage Lagoon Dam
Merrimack, NH
Significant Hazard 18 ftHopkinton Dam - Dike H-3
Merrimack, NH
High Hazard 66 ftHopkinton Dam - Dike H-2
Merrimack, NH
High Hazard 77 ftHoague - Sprague
Merrimack, NH
Significant Hazard 14 ftHopkinton Dam
Merrimack, NH
High Hazard 71 ftTransfer Station Lagoons Dam
Merrimack, NH
Significant HazardKimball Lake Dam
Merrimack, NH
Low Hazard 7 ftGrassy Pond Dam
Merrimack, NH
Low Hazard 9 ftFrequently Asked Questions
What is the hazard classification of Hopkinton?
Hopkinton 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 Hopkinton?
Hopkinton is owned by Town of Hopkinton, NH (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hopkinton built?
Hopkinton was completed in 1890, making it 136 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 Hopkinton?
Hopkinton 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 Hopkinton?
Hopkinton has a dam height of 10 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 Hopkinton last inspected?
Hopkinton was last inspected on July 26, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.